33results about How to "Good mechanical performance" patented technology

The invention relates to a steel-concrete composite bridge and a construction method thereof. The novel steel-concrete composite bridge is characterized by comprising main beams, a cast-in-situ SAP (Super Absorbent Polymer) internal curing concrete bridge panel and shear studs, wherein clustered or uniformly-distributed shear studs are arranged on the main beams; a plurality of main beams are erected in a splicing way along the transverse direction of the bridge; all the main beams are connected into a whole through an end connecting plate along the longitudinal direction of the bridge, thereby forming a multi-hole connection structure; the top surfaces of the main beams are provided with open stiffening ribs, and are coated with an epoxy resin bonding layer; an SAP is poured on the epoxy resin bonding layer to realize internal curing; a cast-in-situ SAP internal curing concrete bridge panel is formed by concrete; the shear studs, longitudinal and transverse reinforcing meshes and the open stiffening ribs are positioned in the cast-in-situ SAP internal curing concrete bridge panel. An FRP (Fiber Reinforced Polymer/Plastic) board or an upper flange steel board of a T-shaped steel beam is a template which is light, has high strength and high stress performance and does not need to be detached; SAP internal curing concrete has a weak shrinking and gradual changing effect, so that the problem of tendency to cracking when the conventional concrete bridge panel is too large and too thin is solved; the influence of floor stand construction on urban traffic is lowered remarkably.

The invention discloses a space joint support structure and support method for a water-rich broken strata tunnel, and relates to the technical field of tunnel construction. The problems that a large-scale deformation is prone to occur due to the fact that a water-rich broken surrounding rock section adopts a conventional spray anchoring to support surrounding rocks, the surrounding rock pressure is great, effective prevention and control of water leakage is difficult, and stability of a tunnel structure and safety of construction are jeopardized are solved. The key points of the technical scheme are that the space joint support structure comprises an initial concrete layer, a steel mesh, and steel arches arranged at intervals; longitudinal connecting steel beams distributed along the axialof a tunnel in a staggered mode are arranged between the steel arches in the circumferential direction; longitudinally connecting steel beams are connected with anchor rods; a steel fiber concrete layer covering the steel arches, the steel mesh, and the longitudinally connecting steel beam sprays the surface of the steel mesh; a waterproof and drainage structure layer paves the surface of steel fiber concrete; and a second lining concrete layer pours the surface of the waterproof and drainage structure layer. According to the space joint support structure and support method for the water-richbroken strata tunnel, deformation of the surrounding rocks in the tunnel can be effectively controlled, the waterproof and drainage functions are excellent, and stability of the tunnel structure andsafety of construction are ensured.

The invention belongs to the technical field of municipal drainage pipelines and particularly relates to a discarding catch basin connected with an anti-silting precipitation trash removal pipeline. The discarding catch basin connected with the anti-silting precipitation trash removal pipeline comprises the anti-silting precipitation trash removal pipeline and an discarding catch basin, wherein the anti-silting precipitation trash removal pipeline comprises a rainwater pipeline wall, an impermeable layer, a rainwater pipeline bin, trash cut inclined nets, buffer slopes, precipitable gratings,bottom precipitation ports, high-lift trash removal pumps, silt output pipelines and precipitation desilting grooves; the discarding catch basin comprises a storage and purification tank, a catch basin cover, an activated carbon core filter layer, an oil removal layer, a nonwoven geotextile layer, connecting rods, float balls, a piston slide, slide pistons, discarding water collection control cavity control holes, an discarding water collection control cavity, an discarding down pipe, a drainage pipeline, rainwater pipelines, a water pump and a water pumping pipe. The discarding catch basin purifies, stores and recycles rainwater while the rainwater is drained effectively, so that automatic control of desilting, purification, discarding and storage of the rainwater is realized, and industrialization process and sponge city construction can be promoted.

The invention discloses a bonded-unbonded pre-stress concrete basement structure and a corresponding construction method thereof. The construction method includes the floor-slab construction involving the steps of: separating a pile body from a soleplate, arranging a plastic plate sliding layer, applying the pre-stress; and carrying out waterproof treatment and integrating the pile body with the soleplate. The outer wall construction involving the steps of: arranging a sliding layer between the outer wall and the soleplate or the floor-slab; applying the pre-stress; carrying out the anti-corrosion treatment to the anchoring tools; carrying out the pressure grouting for the pre-embedded pipes with the bonded pre-stress and grouting the big or small pedestal foot of the outer wall of the basement after the pre-stress is applied to the outer wall of the basement. The basement structure is constructed according to the construction method and has the advantages that the load-carrying capability is better; the leakage can be avoided; the durability is strong and the earthquake resistance is good; in addition, the basement structure eliminates the temperature expansion joints, post-cast strips and expansion reinforced strips, completely avoids the leakage risk caused by the rubber waterproof strip and the like and the trouble caused by the management and maintenance, thus overcoming the various defects of the existing basement.

The invention discloses a rib ring type extendable shear type ring supporting cable dome structure. The rib ring type extendable shear type ring supporting cable dome structure comprises ring cables,stay cables, extendable shear type hinge supporting rods and dorsal cables. According to the novel structure, incontinuous supporting rods in a traditional rib ring type cable dome are replaced with the continuous extendable shear type hinge supporting rods, the supporting rods are continuously arranged in the circumferential direction, and the horizontal projections of the supporting rods coincide with the ring cables. The upper ends of the supporting rods and the stay cables are in hinged connection with the dorsal cables, the inner stay cables and the outer stay cables are hinged to the upper ends and the lower ends of the adjacent shear type hinge supporting rods separately, the ring cables are hinged to the lower ends of the continuous supporting rods on the same rings, and closed arrangement is achieved. By means of prestress tensioning, prestress is established in the dorsal cables, the ring cables and the stay cables, and the structure belongs to an all-tension structure system. Compared with a traditional cable dome structure, the rib ring type extendable shear type ring supporting cable dome structure has good stability performance outside the radial plane, high construction efficiency and good comprehensive economic benefits. The rib ring type extendable shear type ring supporting cable dome structure is suitable for roofs of large-span buildings and suitable for sports buildings and exhibition buildings, and is in a prestress large-span space structural style with broad development prospects.

The invention discloses partially prefabricated section steel-concrete combined column based on side plate and application of the partially prefabricated section steel-concrete combined column, and belongs to the technical field of buildings. The combined column is good in stress performance, stable in component connection, few and simple in construction process and high in construction efficiency; when the height of the combined column is 3000 mm and the section size is 350 mm*350 mm, the section size of I-shaped steel is 350 mm* 350mm* 6mm; when the thickness of an upper flange and a lower flange is 6 mm, the axial compression ultimate bearing capacity can reach 5733.2 kN, the ultimate flexural bearing capacity can reach 272.5 kN.m, and the ductility coefficient can reach 4.02.

The utility model relates to a double-strut cable dome structure, which belongs to the technical field of space structure of civil engineering. A double-strut cable dome structure is mainly composed of ridge cables, oblique cables, continuous struts and ring cables. The new structure is that the struts are arranged continuously from end to end, that is, the projection coincides with the hoop, and all the struts except the central strut are connected through spherical joints. The upper ends of the struts and oblique cables are hingedly connected with the ridge cables, the oblique cables connect the upper and lower ends of the adjacent ring struts, and the hoop cables connect the lower ends of the continuous struts of the same ring, and are arranged in a closed ring direction. Through prestress tension, prestress is established in the ridge cables, ring cables, oblique cables and struts, which belong to the full tension structure system. Compared with the traditional cable dome structure, the double-strut cable dome has the characteristics of light weight, high overall rigidity, and fewer oblique cables. At the same time, it has better mechanical performance, convenient construction, and good comprehensive economic benefits. The roof suitable for large-span buildings is a prestressed space structure form with broad development prospects.

The invention discloses a ring type earhole universal joint, which comprises a connector which is of a ring shape and two jaws which consist of a rotary shaft and a support shaft and are Y-shaped; four earholes are arranged on the connector; and axes of two opposite earholes are overlapped; two axes of the four earholes are in teh same plane and vertical to each other; the rotary shaft and the support shaft are fixedly connected or integrally molded; a connecting structure used for being connected with other shafts is arranged on the rotary shaft; two shaft heads which are in rotational matching with the two opposite earholes are arranged at two ends of the support shaft; and the two jaws are respectively installed at two sides of the connector. The ring type earhole universal joint provided by the invention can effectively overcomes defects in stress concentration of the existing universal joint pin and has simple structure and better stress performance. The invention also discloses the connector and the jaws, which are arranged on the ring type earhole cardan and are coordinately used.

The invention provides an underground comprehensive pipe rack segment waterproof splicing structure and an installation method thereof. The underground comprehensive pipe rack segment waterproof splicing structure comprises splicing grooves, wherein two steel angle cushion layers are arranged in the splicing grooves, and additional waterproof rubber layers are arranged on the steel angle cushion layers; a detachable water stop piece is arranged on the upper sides of the two steel angle cushion layers in the splicing grooves, and the detachable water stop piece, the waterproof rubber layers and the steel angle cushion layers are in screwing fastening connection with threads in one ends of fixing steel feet through nuts and are fixed into the splicing grooves; and a glue injecting conduit is placed on the lower side of the detachable water stop piece, and a blocking plate is placed on the upper side of the detachable water stop piece. According to the underground comprehensive pipe rack segment waterproof splicing structure, the waterproof performance is good, the force performance is good, the maintenance is convenient, and timely replacement when a waterproof structure at a splicing position is aged can be ensured due to the fact that the detachable water stop piece is installed at a splicing seam position; and by pre-burying the glue injecting conduit in the splicing seam position, the splicing seam position can be blocked effectively and rapidly, the repairing quality is effectively ensured, and the waterproof performance at the splicing position of a segment is enhanced.

The invention relates to a connecting node for a building, in particular to a assembly-type limiting reinforced steel wood frosted sleeve combined node. The node comprises a square center column, X-shaped wood beams and beam column connecting assemblies, the beam column connecting assemblies are fixedly sleeved on the outer side of the square central column, and each X-shaped wood beam is locatedon the outer side of each beam column connecting assembly and is fixedly connected with each beam column connecting assembly; the square center column comprises a frosted wood column, a frosted steelsleeve, a frosted wood sleeve outer shell, an FRP fiber reinforced composite material layer and a central column frosted steel cover, the center of the frosted wood column is provided with a first central hole running through in the length direction, a prestressed steel strand passes through the first central hole, the frosted steel sleeve is in a hollow square body and is fixedly sleeved on the outer side of the frosted wood column, a closed annular inserting groove is formed between the upper end and the lower end of the frosted steel sleeve and the two ends of the frosted wood column. According to the assembly-type limiting reinforced steel wood grinding sleeve combined node, the productization, assembly and standardization of combination nodes are realized, the labor cost is effectively reduced, the efficiency is improved, and the construction period is shortened.

The invention discloses a hole wall side expansion rotary shearing device for a drilling shear test and a test method. The device comprises a mounting assembly for supporting the device, a lifting assembly and a shearing assembly; the lifting assembly is used for driving the shearing assembly to lift; the shearing assembly comprises a drill rod and a power device used for driving the drill rod to rotate and detachably connected with one end of the drill rod. The shearing unit comprises a first probe part and a second probe part arranged below the first probe part and connected with the first probe part; The device also comprises an expansion pipe which penetrates through the first probe part and extends into the second probe part; the expansion pipe is connected with a normal force providing device; a plurality of shearing sheets are arranged on the surface of the second probe part in the radial direction; the shearing sheets are arranged in an array, and the shearing sheets on the same straight line in the radial direction of the second probe part form a group; shearing sheets in two adjacent groups of shearing sheets are arranged in a staggered manner; opening positions distributed in the radial direction are arranged on the surface of the second probe part between two adjacent groups of shearing sheets. According to the invention, a lateral pressure test and a shear test can be realized, and the stress performance is good.

The invention provides an assembly type prestressed highway tunnel crash barrier and belongs to the technical field of highway tunnel safety protection. Transverse and longitudinal stressed steel bars and crash barrier shear reinforcements are arranged in the crash barrier and extend out of the bottom of a crash barrier body to form an external extension reinforcement cage. When the crash barrier is connected with a highway foundation, the reinforcement cage reserved at the bottom end of the crash barrier is inserted into a pouring groove reserved in the highway foundation and then high-strength concrete is poured. Bottom sleeves are mounted at the junction between the crash barrier and the highway foundation, and the bottom sleeves, the crash barrier and the highway foundation are connected together through connecting bolts. Prestressed riggings are arranged in the crash barrier. Anti-collision rollers are arranged on the right surface of the crash barrier. The assembly type prestressed highway tunnel crash barrier has the beneficial effects that the assembly type prestressed highway tunnel crash barrier is good in anti-collision performance, good in stress performance, convenient to mount, easy to replace and quick and convenient to install; when a vehicle collides with the surface of the crash barrier, the anti-collision rollers on the outer surface of the crash barrier and the prestressed riggings arranged in the crash barrier body are combined to bear force to achieve the good buffering effect on the collided vehicle.

The invention discloses a building method for a scaffold used for drilling platform pile leg splicing. The building method for the scaffold used for drilling platform pile leg splicing includes the steps that a triangular region of drilling platform pile legs is built; a passage for the drilling platform pile legs is built; a main chord cantilevered frame of the drilling platform pile legs is built; an inner two-step frame of the drilling platform pile legs is built and is divided into an upper layer two-step frame and a lower layer two-step frame; protective railings and foot stopping plates of the drilling platform pile legs are built. The building method for the scaffold used for drilling platform pile leg splicing is high in safety and low in cost and saves time and labor, and the scaffold is easy to build.

The invention discloses a rainwater collection city road with an integral large cavity bottom groove. Pervious concrete cover plates are adopted on side pavements on two sides of the city road, a temporary water storage and water drainage layer is formed by the pervious concrete cover plates and the integral large cavity bottom groove, the integral large cavity bottom groove is connected with municipal pipelines, and side pavement rainwater and road rainwater can be collected and temporarily stored simultaneously; the side pavement rainwater is filtered through the pervious concrete cover plates to flow into a side pavement rainwater and road rainwater collection and temporary storage layer, and then the rainwater enters the municipal pipelines; city road rainwater is filtered through a road rainwater inflowing gate to flow into the side pavement rainwater and road rainwater collection and temporary storage layer, and then the rainwater enters the municipal pipelines. The rainwater collection city road has the beneficial effects of simple structure, good stress performance and simple and convenient processing, and the road rainwater collection and drainage system can effectively solve the problem that an existing pavement is easy to pond. A large quantity of rapid collection temporary water storage cavities can be used for rapid collection and storage through pervious holes, and efficient rainwater utilization and disaster prevention effects are realized through subsequent long-term water seepage and water purification for a period of time.

The invention relates to a rainwater collecting ecological porous road surface having functions of purifying air and preventing frost heave, and belongs to the fields of technical control on air purifying, noise reducing, sewage interception, water collecting, water draining, and rainwater filtering and purifying treatment. The road surface structure sequentially comprises a highway, border stones, porous skidproof surface layers, temporary water storage ponds, municipal pipe network and the like from middle to two sides. Porous foam concrete, graded broken stone layers, water purification layers and a non-woven geotextile layer are arranged for performing effective filtration on seeped water; and when the road surface has a slope, the whole road structure is preferentially perpendicular to the direction of the slope. The rainwater collecting ecological porous road surface disclosed by the invention is simple in structure, good in stress performance, good in seepage effect, low in paving cost and simple in paving technology; the road structure can recover, store, filter and purify rainwater, and the problem of water gathering on the road surface is effectively solved; and besides, air is purified, the problems that in winter, the road surface in a northern city is poor in frost heave resistance property can be effectively solved, the heat island effect is reduced, the city noise pollution is effectively improved, and the rainwater collecting ecological porous road surface is ecological and environmentally friendly.

Provided is a sub-conductive wire spacing bar which comprises a polygon framework and a wire clamp body which is connected with the framework. The head end part of the wire clamp body presents to be a hooked shape. The internal arc surface of the hook is provided with an elastic anti-skid protective mat. The cross section of the framework presents to be H-shaped. The framework and the wire clamp body are provided with through holes with different hole diameters. The through holes with different hole diameters are internally provided with cone-shaped clamping pieces which are connected with the framework and the wire clamp body. A gap is arranged between axial directions of the framework and the wire clamp body of the spacing bar so that wearing caused by mutual friction between the framework and the wire clamp body is avoided.

The invention discloses a tunneling device with the drilling distance being adjustable and a tunneling machine. The tunneling device comprises a cutterhead, multiple heads, a fixing mechanism and drilling mechanisms, and the heads are vertically arranged on the cutterhead and slidably connected with the cutterhead. The fixing mechanism is used for fixing the heads sliding on the cutterhead onto the cutterhead so as to adjust the positions of the heads on the cutterhead. The drilling mechanisms are arranged on the cutterhead and comprise drill rods capable of stretching out and drawing back inthe axial direction on the cutterhead. The drilling mechanisms are arranged on the cutterhead, drilling pre-breaking to to-be-excavated rock mass is completed through the drilling mechanisms, then theheads are arranged on the cutterhead and slidably connected with the cutterhead, the positions of the heads on the cutterhead are adjusted, finally the to-be-excavated rock mass is tunneled through the cutterhead with the positions of the heads adjusted, the mechanical property of the heads can be better exerted, and therefore the aim of efficiently tunneling the to-be-excavated rock mass is achieved.

The invention discloses a connecting joint for an outer sleeve pipe type concrete filled steel tubular column and a steel girder end plate. The connecting joint comprises the concrete filled steel tubular column, a steel girder, an end plate, high-strength unidirectional self-fastening bolts and an outer sleeve pipe, wherein the edge of the outer sleeve pipe is welded to the outer side of a steel tubular column wall in the lap joint position of the steel girder and the concrete filled steel tubular column, and the end plate is located on the outer side of the outer sleeve pipe; the end of the steel girder is welded to the end plate; the unidirectional self-fastening bolts are inserted into bolt holes reserved in the end plate, the outer sleeve pipe and the steel tubular column wall from outside to inside; the heads of the unidirectional self-fastening bolts have a self-supply function, and riveting heads are formed on the inner side of the concrete filled steel tubular column; concrete is poured into the concrete filled steel tubular column. The connecting joint has good stress and anti-seismic properties, is simple in structure, definite in force transmission and fast in construction and facilitates structure layout. The problems that high-strength bolts are difficult to construct in a joint area, and the steel tubular column wall at the connecting joint of the unidirectional self-fastening bolts is prone to protrude outwards and deform due to lack of protection are solved. The connecting joint is a novel semi-rigidity connecting joint for the concrete filled steel tubular column and the steel girder.

The invention discloses a novel assembly type bridge lower structure which comprises pier stand columns composed of profile steel stand column inner cores and concrete reinforcing layers poured aroundthe profile steel stand column inner cores, the tops of the inner cores extend out of the concrete reinforcing layers to form top socket sections, and the bottoms of the inner cores extend out of theconcrete reinforcing layers to form bottom socket sections. Pier caps are arranged on a bent cap, and top socket grooves matched with the top socket sections are formed in the pier caps. Bearing platforms are of a cast-in-place reinforced concrete structure, and bottom socket grooves matched with the bottom socket sections are formed in the bearing platforms. Poured reinforcing layers are high-strength shrinkage-free cement grouting material layers poured into top inserting seams formed by the top socket sections and the top socket grooves and bottom inserting seams formed by the bottom socket sections and the bottom socket grooves. According to the invention, the socket sections of the inner cores of the large-size section steel stand columns are respectively in socket connection with the bent cap and the bearing platforms, so that the construction precision requirement is reduced, the construction process is simplified, and the construction period is greatly shortened.

A container (1) includes a body and a petaloid base (3) extending the body, the base (3) including feet (7) separated into pairs by recessed valleys (12) that extend radially to an edge (8), the base (3) further including a series of grooves (17) that extend radially, extending at least partially along the bottom of the valleys (13), in which:

The invention provides a cement-based composite material. A dry basis of the cement-based composite material comprises the following components in parts by mass: 40-45 parts of magnesium oxide, 25-30parts of monopotassium phosphate, 10-16 parts of fly ash, 4-10 parts of borax and 0.4-4 parts of coconut fibers. A building component formed by pouring the cement-based composite material provided bythe invention has the compressive strength of 42-54MPa and the breaking strength of 12-20MPa, has the characteristics of quick setting, high strength and high toughness, and is suitable for quick repair of roads and airfield runways with large traffic flow, such as high speed and municipal administration; production of building materials combined with industrial waste, manufacturing of artificialboards serving as novel binders, solidification treatment of frozen earth areas and deep oil wells and the like are well applied. Based on the good toughness, energy absorption performance and stressperformance of the renewable plant fiber cement-based composite material, the renewable plant fiber cement-based composite material can be gradually added into an engineering load-bearing members.

The invention discloses a vehicle cover guide rail connecting device which comprises a body. The body comprises a first connecting block and a second connecting block, the first connecting block is arranged outside a guide rail, the second connecting block extends into the guide rail, the first connecting block is connected with the second connecting block, and the body is connected with a supporting piece used for supporting the guide rail. The guide rail is clamped and connected through the first connecting block and the second connecting block, upward pre-stress is applied to the guide rail through the supporting piece, the guide rail is supported, and the guide rail is prevented from collapsing and deforming at the connecting position.

The invention relates to a tree-shaped trident steel pipe column for supporting an outdoor concrete platform. The tree-shaped trident steel pipe column for supporting the outdoor concrete platform comprises a lower steel pipe, at least two upper steel pipes, a bifurcate connecting piece, a concrete slab, water drainage pipes and concrete, wherein the bifurcate connecting piece is a connecting nodeof the lower steel pipe and the upper steel pipes, the lower end of the lower steel pipe is fixed on a base surface, the upper end of the lower steel pipe is fixedly connected with the lower end of the bifurcate connecting piece, the bottoms of the at least two upper steel pipes are welded to the upper end of the bifurcate connecting piece, the upper ends of the upper steel pipes are fixedly connected to the concrete slab, and the communicating drainage pipes are arranged in the lower steel pipe, the upper steel pipes and the bifurcate connecting piece, and the concrete is poured between theouter wall of the drainage pipe and the inner walls of the lower steel pipe, the upper steel pipes and the bifurcate connecting piece. According to the tree-shaped trident steel pipe column for supporting the outdoor concrete platform, the platform has good stress performance and is low in cost, can effectively shorten the construction time, and meet the requirement for attractiveness of outdoor platforms of various forms.

The invention relates to the field of electric power facilities, and discloses a section steel support and cover plate fabricated foundation for a frozen earth area. The foundation comprises bottom plate battens and a bottom plate connecting cross beam, the bottom plate battens are arranged in parallel, the bottom plate connecting cross beam is perpendicularly connected to the bottom plate battens, the bottom plate connecting cross beam is provided with a section steel support, the section steel support comprises at least three main materials, and the main materials form a conical structure. The bottoms of the main materials of the section steel support are connected to the bottom plate connecting cross beam in a scattered manner, the tops of the main materials of the section steel support converge and are connected with a connecting base plate used for being connected with an iron tower foot plate, and a cover plate is arranged at the periphery of the section steel support to form a conical structure with the periphery closed. The surface friction coefficient of the section steel support and the surface friction coefficient of the cover plate are both smaller than the surface friction coefficient of concrete. By the adoption of the foundation, frost heaving force generated by frozen soil on the foundation can be reduced, the construction period is short, and the stress performance is better.

The invention provides a unilateral external-hanging-type enclosed fire prevention system, and belongs to the field of underground engineering disaster prevention. An I-shaped mounting bracket is mounted on a cabin plate through expansion bolts, one side of the I-shaped mounting bracket is connected with the bolt connection end of a unilateral external-hanging-type enclosed fire prevention plate,and the other side of the I-shaped mounting bracket is connected with the plug end of the unilateral external-hanging-type enclosed fire prevention plate; the unilateral external-hanging-type enclosedfire prevention plate connected at the bolt connection end is mounted before the unilateral external-hanging-type enclosed fire prevention plate connected at the plug end. The unilateral external-hanging-type enclosed fire prevention system has the advantages of good fire prevention performance, good stress performance, quickness and convenience in mounting, easiness in replacement, effective full coverage on portions with poor fire prevention performance, significantly improved fire and disaster prevention performance, and capability of effectively reducing casualties and economic losses inthe event of a fire of an underground structure.

The invention provides a prefabricated concrete-filled steel tube composite column and a building thereof. The composite column comprises a steel tube, a tube filled concrete column, a tube outside concrete layer and a steel reinforcement framework, wherein the tube filled concrete column which is formed by filling and pouring during prefabrication is arranged in the steel tube; the tube outside concrete layer wraps the steel tube; the steel reinforcement framework is embedded in the tube outside concrete layer; and connecting structures are respectively arranged on both ends of the steel tube. The prefabricated concrete-filled steel tube composite column has the advantages of good stress performance, good quality of factory prefabricated parts, high construction efficiency, simplicity and convenience in connection, good corrosion resistance and fireproof performance, high durability, wide application range, good economy and the like and has good application prospects in steel structure engineering.

The invention discloses a large-span multi-channel monorail traffic rail beam bridge, and belongs to the field of monorail traffic. The large-span multi-channel monorail traffic rail beam bridge comprises a stay cable system and a sling system. A multi-channel monorail traffic track beam is characterized in that two or more monorail traffic driving channels are formed on the same beam, and the line shape of the multi-channel monorail traffic track beam is determined on the basis of the minimum radius of the channel with the maximum driving speed and is kept consistent with the line shape of aline. A cable beam anchoring device on the outer side surface of a web on the lower portion of the multi-channel monorail traffic track beam is anchored together with a stay cable or a sling, the distance S between the anchoring position and the centroid axis of the cross section of the track beam is smaller than or equal to 1.0 m, vehicle loads borne by the track beam are transmitted to a bridgetower, and the large-span multi-channel monorail traffic track beam bridge is formed.

The invention discloses a support joint of a cable dome structure and a machining method. The machining method comprises the steps of using three-dimensional mechanical design software for modeling an original node model, and obtaining a first file; importing the first file into finite element analysis software for topological optimization, and finally performing facet repairing and merging on a topological optimization result to obtain a second file with the topological optimization result; importing the second file into instant simulation software to carry out rapid smoothing processing on an optimization result; manufacturing the outer contour of the joint by using an evanescent mode, and filling and leveling up the hole characteristics in the joint model to obtain a foam model; brushing the foam model with an alcohol-based coating, and filling the foam model with organic ester sodium silicate sand to make a sand mold; and destroying the foam model and gasifying to form a cavity, inputting the mold core into the cavity, and performing mold closing and pouring after coating is brushed. According to the support joint manufactured through the machining method, the dead weight of the joint is reduced, and the safety and stability of the joint are improved; meanwhile, the support joint is clear in force transmission route and reasonable in stress form.

The invention pertains to composition of fluoroplastic and poly(aryletherketone), to method of making the same, and to shaped products therefrom, including notably wire sheaths, which combine advantageous performances of both ingredients, which can be easily manufactured through conventional equipment's, and which notably deliver room temperature toughness, in combination with notably chemical resistance and dielectric properties of fluoroplastics and with mechanical performances of poly(aryl ether ketone)s.

The invention relates to a connecting method of a prefabricated concrete member and belongs to the technical field of prefabricated concrete structures. Through the connecting method, a first prefabricated concrete member body and a second prefabricated concrete member body are connected into a whole. The connecting method is characterized in that the first prefabricated concrete member body is provided with at least one non-through hole; steel bars are arranged in the holes; the steel bars are anchored in concrete of the side walls of the holes; anchored steel bars stretch from the second prefabricated concrete member body; the first prefabricated concrete member body is installed, the holes are filled with concrete or a grouting material, and then the second prefabricated concrete member body is installed; and the anchored steel bars of the second prefabricated concrete member body stretch into the holes.