32results about How to "Simple and economical construction" patented technology

The invention provides a stretch-draw forming composite structure arch bridge and a building method thereof. The arch bridge comprises at least two lower strings (2), at least two upper strings (4), a set of flying shores (5), a set of web members (1) and a set of beams (3), wherein the lower strings (2) are straight and parallel to each other, the upper strings (4) upwards arch and are parallel to each other, the flying shores (5) are transversely connected between the two adjacent upper strings, the web members (1) are connected between the upper strings and the lower strings of the same sides, the beams (3) are connected between the two adjacent lower strings; a plane bridge floor system is jointly constituted by the lower strings and the beams, each lower string is formed by splicing a set of lower string pipes (2b) penetrating on a lower string steel cable (2a) in sequence, and the adjacent lower string pipes are connected through flange bolts; and each upper string is formed by welding upper string pipes (4a) in sequence, the bottoms of the two ends of the spliced upper string pipes are welded to the two ends of the spliced lower string pipes correspondingly, and the spliced lower string pipes and upper string pipes are grouted with micro-expansive mortar or concrete. According to the stretch-draw forming composite structure arch bridge and the building method thereof, the construction forming state and the operating loading state can be integrated into a whole in arch bridge building, and construction is rapid, easy and economic.

This paper describes a winding device for wrapping material around a flat core rotating about an axis of rotation which in turn follows a circular trajectory, controlling the rotation of the core about its axis and the orientation of its axis of rotation The law of motion of both circular trajectories (independently driven by motors via electric cams) to counteract the position and velocity changes of the material at the core inlet. The winding device is used to manufacture an electrical energy storage device.

The invention relates to the technical field of coral reef ecological restoration. A layered artificial reef depending on wind power supply comprises layered reef disks, a center cylinder and concrete pier type bases and is characterized in that the layered artificial reef depending on wind power supply is fixed through the concrete pier type bases, the upper portion of the center cylinder is connected with a wind power generation device and supplies power to the layered reef disks and coral reef adhering units on the layered reef disks, and the lower portion of the center cylinder stretches to the seafloor. Due to the combination of a wind power generation technology and a layered truss structure, the novel artificial coral reef which is free of pollution and stable is provided; due to the design, adhesion of coral insects and growth of coral can be stimulated, the metabolism period of the coral insects is shortened, and the ecological restoration work of the coral reef can be greatly accelerated.

The invention provides a multipoint fastening and reinforcing method for a concrete silo structure. The method comprises the steps: firstly, arranging a vertical unequal-sided angle steel on the external wall of a silo at intervals of certain spacing, and equidistantly planting chemical anchor bolts along the vertical directions of the angle steels so as to anchor the angle steels on the wall of the silo, wherein long sides of the angle steels are tightly attached to the surface of the external wall of the silo; then, arranging a steel plate strip, which horizontally encircles the silo, at intervals of certain spacing along the vertical direction of the silo; forming a bolt hole in each part, directly facing to the corresponding long side of each corresponding angle steel, of each corresponding steel plate strip; enabling bolts to penetrate through the bolt holes in the steel plate strips from outside to inside, and arranging a puller nut at the part, located between the corresponding steel plate strip and the corresponding angle steel, of each bolt; screwing the bolts so as to enable the front ends of the bolts to be abutted against the long sides of the angle steels, and meanwhile, outwards turning the puller nuts so as to enable the puller nuts to be outwardly abutted against the steel plate strips and apply certain prestress to the steel plate strips; then, hanging a reinforcing mesh; finally, building a sliding formwork, and pouring a layer of reinforced concrete outside the wall of the silo.

The invention discloses a smoothwall blasting method for digging a tunnel. The method includes the basic processes of marking the shot point, digging and drilling holes, installing the blasting devices, connecting all the blasting devices through detonating fuses, connecting a millsecond detanator and an electric detonator, and finally detonating through a blaster. The method solves the problem of big damage to the wall rocks in the process of digging and blasting the tunnel and is particularly good for controlling over-excavation and under-excavation. The method saves the digging cost and atthe same time makes the late support construction of the tunnel simpler and more economic.

Dampening device (1) for a Dozer blade (10) and related earthwork equipment (100); the blade (10) being carried by a frame (102) of the equipment (100) through the interposition of an actuating unit (106) suitable to adjust the vertical position of the blade (10); an axial-symmetrical member (11) being carried by the frame (102) to dampen oscillations associated, in use, to the forward movement of the blade (10).