38results about How to "Reduce dismantling process" patented technology

The invention discloses a complete set of tunnel mechanical equipment, which specifically refers to an excavation trolley (or an excavation gantry), a drainage and steel bar binding trolley, a liningtrolley, a spray maintenance trolley, a ditch cable trough trolley, an inverted arch self-propelled hydraulic trestle and a wet spray manipulator, referred to as five trolleys, one trestle and one wetspray machine. A construction organization method matched with the complete set of mechanical equipment comprises the following construction organization steps: S1, hole excavation; S2, initial support; S3, inverted arch lining; S4, arched wall lining; S5, ditch cable troughs and the complete set of mechanical equipment. The construction organization method is reasonable, effectively improves tunnel management effect, improves construction operation environment, ensures construction safety and quality, improves construction progress and is worthy of promotion.

The invention discloses a formwork reinforcing device without top support for a post-cast strip and a construction method thereof. The formwork reinforcing device comprises basement top plates, waterstop screw rods, main rib steel pipes, timber cushion blocks, clamps, back rib timbers, formworks, a post-cast strip beam and plain concrete columns, wherein the basement top plates are respectively arranged at both ends of the post-cast strip beam; the main rib steel pipes are arranged at the upper end and lower end of each basement top plate at equal intervals along the horizontal direction; three water stop screw rods penetrate through each of the main rib steel pipes at equal intervals along the longitudinal direction; the timber cushion blocks are respectively arranged at one end of the upper end surface of each basement top plate. The formwork reinforcing device has the beneficial effects that the problem of accumulation of revolving materials such as lower steel pipes, formworks, timbers and the like at the overhanging end of the post-cast strip in the building construction project are solved, the construction cost is reduced, the load bearing function of the formwork supportingsystem can be replaced, and the project quality of the beam plate at the overhanging area of the post-cast strip is effectively guaranteed; the operation is simple, the use is convenient, the good social benefit is realized, and the formwork reinforcing device is suitable for being popularized and applied.

The invention provides a frame-shear wall structure based on three-side-grooved strip precast concrete wallboard assembly and a construction method thereof. The structure comprises a cast-in-place spatial form system formed by mutually connecting strip precast concrete wallboards, wall column forms, shear walls and floor/roof forms; the strip precast concrete wallboards are precast with reinforced concrete, each wallboard is provided with end grooves and two side grooves, and the each wallboard can be provided with an insulation layer and a decorating layer as required; rebars are placed and concrete are poured between the wallboards or between the wallboards and wall columns, between the wallboards and the shear walls, including a cavity with side grooves, into space communicated through the end grooves, and onto the floor/roof forms, so that a single floor frame-shear wall structure building of a building unit is formed; a multi-floor building unit can be constructed by lap joint based on the single-floor building unit. The frame-shear wall structure and the construction method thereof have the advantages that manufacturing is simple, investment on production equipment is low, construction steps are fewer, construction speed is higher and less labor is required.

The invention provides a prefabricated reinforced concrete hollow column template which is internally embedded with reinforcing steel bars and is provided with one or a plurality of hollow hole duct(s) which is/are penetrated longitudinally; and the cross section shape of the outer wall surface of a column body of a hollow column die as well as the cross section shape of the inner wall surface of the hollow hole duct are square. The invention also provides a manufacturing method of the prefabricated reinforced concrete hollow column template by adopting a die. The hollow column template provided by the invention has the advantages of simplicity in machining, simplicity and convenience in construction and the like, and can be widely applied to various building constructions.

The invention provides a construction structure for a high-inclination sloping roof. The construction structure comprises a lower layer formwork, an upper layer formwork, keels and limiting waterproof bolts; the lower layer formwork is parallel to the upper layer formwork, and a pouring space is formed by the lower layer formwork and the upper layer formwork; the keels are arranged on the peripheral faces of the lower layer formwork and the upper layer formwork to support the lower layer formwork and the upper layer formwork; the limiting waterproof bolts are arranged in the overlapped direction of the lower layer formwork and the upper layer formwork and used for fixing and locating the lower layer formwork, the upper layer formwork and the keels, wherein the portions, above concrete, of the limiting waterproof bolts are reserved after first-stage concrete pouring is completed and are used for fixing roof tiles. By means of the construction structure for the high-inclination sloping roof, the concrete pouring quality can be improved, and the engineering cost can be reduced.

The invention provides a slab column-shear wall structure building based on precast reinforced concrete hollow formworks and a construction method thereof. The building comprises a cast-in-place space formwork system which is formed through the interconnection of hollow column formworks, wall formworks and floor/roof formworks, wherein each hollow column formwork is made of reinforced concrete in a precasting way and provided with at least one longitudinally-penetrating hollow channel; through the interspersion of reinforcements and the filling of concrete in the intercommunicated hollow channels of the hollow column formworks and the wall formworks and the laying of the reinforcements and the pouring of the concrete onto each floor/roof formwork, a single storey slab column-shear wall structure building which can be a one-storey building unit or a single-storey building is formed; and next, based on the one-storey building unit, a multistorey building unit can be formed in a lap joint way. The slab column-shear wall structure building based on the precast reinforced concrete hollow formworks and the construction method thereof provided by the invention have the advantages of simplicity in workpiece processing, low production equipment investment, fewer installation procedures, high construction speed, lower labor cost and the like.

The invention belongs to a demolition construction method of cable cranes, in particular to a demolition construction method for a large-span cable crane adjacent to a railway business line, and solves the technical problem in the background art. The method comprises the following steps: firstly, a hoisting rope 1, a traction rope, a bearing cable 9 and a working rope 10 are demolished stepwise, and then parts above 100 m of a super high-rise tower are disassembled by a shaking derrick mast 14; the 80-100 m part is disassembled by a jib of a truck crane 15; and the part below 80 m is demolished as a whole by a main jib of the truck crane 15. The construction method is special for demolition of large-span cable cranes on the railway business lines with short demolition period and poor working environment, the super-high-rise tower system is divided into three parts to be demolished, the three parts are demolished in different means, demolition of conventional single-layer loose parts isadjusted to be demolition of whole demolition stepwise, so that working efficiency is improved, a large number of high-altitude operations are switched to ground work, safety risks are reduced to thegreatest extent, railway blockade points are reduced, and safety of railway business lines is ensured.

The invention provides a support-free formwork for reserved bolt holes of a roughing mill body and a construction method. The support-free formwork comprises a reserved hole box, wherein the reservedhole box comprises a bottom sealing plate, a plurality of threaded steel pipes and a top sealing plate; the threaded steel pipes are uniformly distributed between the top sealing plate and the bottomsealing plate; the top sealing plate is provided with top sealing plate holes corresponding to the upper ends of the threaded steel pipes; the upper ends of the threaded steel pipes penetrate throughthe top sealing plate holes and are fixedly connected with the top sealing plate; the bottom sealing plate is provided with bottom sealing plate holes corresponding to the lower ends of the threaded steel pipes; and the lower ends of the threaded steel pipes penetrate through the bottom sealing plate holes and are fixedly connected with the bottom sealing plate. According to the support-free formwork, the defects of wood formwork construction are effectively overcome, the overall rigidity of the formwork is improved through the threaded steel pipes, the formwork dismounting process is reduced,time and labor are saved, the threaded steel pipes and a concrete foundation are fixedly connected into a whole for use, the quality of the reserved bolt holes is guaranteed, and meanwhile, foundation bolts can be effectively prevented from being pulled out through threads of the threaded steel pipes.

The invention belongs to the field of tunnel construction, and particularly discloses a large-span small-clear-distance shallow-buried tunnel excavation construction method which comprises the following steps: determining basic mechanical parameters of surrounding rocks: testing the basic mechanical parameters of the surrounding rocks of a current construction section by carrying out an indoor test on a rock sample taken on site; after testing, according to the determined basic mechanical parameters of the surrounding rock, carrying out surrounding rock partition evolution analysis and excavation method judgment on the currently constructed section; tunnel arch advanced grouting reinforcement is carried out on the currently constructed large-span small-clear-distance segment; excavating an upper step and primarily supporting; excavating a middle step and carrying out primary support; excavating a lower step and primarily supporting; an inverted arch is excavated, and an inverted arch steel frame is installed and backfilled; and laying a waterproof plate, and completing construction after quality inspection. According to the method, an IV-level surrounding rock three-step four-step excavation mode and a V-level surrounding rock lining mode are adopted, namely, rapid excavation, strong supporting and frequent measurement are achieved, and tunnel construction safety is ensured.