148results about How to "Reduce the amount of work at height" patented technology

The invention discloses a large valve and large-diameter pipeline pre-assembly pup joint manufacturing and hoisting method. The manufacturing and hoisting method is characterized in that a prefabricated segment and a pre-assembly entirety are manufactured in a ground machining field, and the pre-assembly entirety is hoisted in place with a vertical transportation machine to be connected with an installed overhead large-diameter pipeline in a butt-joint welding mode; the method comprises the technological processes of construction preparing, prefabricated segment manufacturing, pre-assembly entirety manufacturing, pre-assembly entirety hoisting, butt-joint welding of the pre-assembly entirety and the installed overhead pipeline and checking and accepting. The hoisting method has the advantages that the tedious and high-difficulty high-altitude operation process is simplified and completed in the ground machining field, and therefore the problems that in traditional construction, the construction processes are tedious, the construction period is long, the high-altitude operation construction operation surface requirement is high, and the welding and installing quality is difficult to guarantee are solved; the whole construction process is in a safe, stable and controllable state, the installation precision is high, the construction period can be shortened, the construction efficiency is improved, the labor and material cost is reduced, and the economic benefit is significant.

The invention discloses a construction method of a large-diameter barrel cabin top, and relates to the technical field of building construction engineering. H-shaped inclined steel beams are designed in groups. Welding of an H-shaped inclined steel beam assembly is finished on the ground. After a ring beam is temporarily positioned above a barrel body, the welded H-shaped inclined steel beam assembly is lifted and is respectively welded with the barrel body and the ring beam. Finally, temporary positioning pieces of the ring beam are removed. Due to the fact that the welding of the H-shaped inclined steel beam assembly is finished on the ground, the H-shaped inclined steel beam assembly is lifted between the barrel body and the ring beam according to a suspension center on a design drawing and then is welded, at least 75% of quantity of work on the upper air is saved, quality is effectively guaranteed, safety and high-labor-intensity defects brought by the work on the upper air are greatly reduced, work efficiency is improved, and construction cost of the large-diameter cabin top is greatly reduced.

The invention discloses a synchronous vertical swing lift construction method for a double inclination arc tower. The method comprises the following steps: arranging a vertical swing winch at the combination of two gate-shaped arch ribs and reinforced concrete, arranging a bearing gate type lifting tower at the position of the symmetrical central line of the arch ribs, arranging an upper lifting sustained center and a lower lifting sustained center at the top of the tower and on the arch ribs respectively, and performing symmetrical synchronous vertical swing lift through two pairs of hydraulic lifters by utilizing the symmetry character of the double arch ribs, so as to achieve the purpose of vertically swinging the arch ribs from the planimetric position to the mounting position. The construction method has the advantages that the arc tower construction difficulty is reduced, tools and materials are saved, the construction period is shortened, and the installation of two mammoth arch rib structures can be completed with high precision and high quality; aloft work of the arch ribs is converted into ground integral assembly work, the construction efficiency is high, the safety protection work is easy to organize, and the construction quality is easy to guarantee; machines and equipment required for the construction are in a small quantity, the process is simple, and the operation is safe; the construction speed is high, the manufacture cost is low, and the investment is saved.

The invention provides a semi-precast beam, which mainly comprises a beam body and steel bars (a general name of stressed steel bars, stirrups and tie bars), and is characterized in that: only the stressed steel bars and the stirrups on the lower part are pre-arranged in the semi-precast beam; and the beam body is exposed on a banding or welding part of the stirrups and other post-arranged stressed steel bars to prevent the steel bars on the upper part from impeding construction. The semi-precast beam has the advantages that: the steel bars of the semi-precast beam do not conflict with the steel bars of other components in the process of installation, so that the treatment of the steel bars at joints meets the requirement of a specification of a reinforced concrete structure; a beam holding component bears the construction load instead of a full scaffold by using a principle of simply supported beams; the connection of the steel bars and the banding of templates are performed on the floor, so that the safety of workers is ensured, and the construction efficiency and the construction quality are obviously improved; the amount of high-altitude operation is substantially reduced; and the post-casting of concrete is operated on the floor, and the amount of the post-cast concrete is substantially reduced, so the construction speed is substantially improved.

The invention discloses an integral modular structure of an industrial furnace and a construction method. The integral modular structure comprises a main body part and accessory equipment and accessories. The main body part of the integral modular structure of the industrial furnace comprises a radiation section modular structure, a convection segment, a radiation furnace pipe, a crossing pipe for connecting a convection furnace pipe with the radiation furnace pipe and a supporting hanging system for the radiation furnace pipe and the crossing pipe. The accessory equipment and accessories comprise a chimney, a waste heat boiler, a steam pocket, a draught fan, an ash ejector, parts of platform and ladder, an instrument and a cable of the instrument. The method comprises the steps that the main body part of an integral module of the industrial furnace and the accessory equipment and accessories of the integral module of the industrial furnace are manufactured and assembled in a workshop, integrally transported and integrally mounted to be in place. Integral modular design, workshop modular manufacturing, integral assembly, integral transportation and field integral mounting to be in place are adopted in the industrial furnace; the construction difficulty is reduced, the manufacturing precision and the construction schedule are ensured, the labor cost of site operation is low, the construction period is short, and construction is safe.

The invention discloses a construction method for integrally and downward putting cofferdam ring beams by means of a continuous jack method. The construction method sequentially comprises: step one, installing a ring beam hanging system; step two, integrally uplifting ring beams and dismounting ring beam butt-joint platform bailey beams; step three, firstly putting the ring beams downward; step four, converting a ring beam system; and step five, secondarily putting lower-layer ring beams downward. A jack is continuously used for providing force for putting the ring beams downward, so that the demand for labor force is reduced, and temporarily organized large-scale labor force is avoided. In addition, corresponding cost is reduced, the ring beam splicing time on a cofferdam is shortened, and time is saved for tubular pile inserting and driving and sludge suction of the cofferdam. The integral downward putting of the ring beams can reach 2m each hour, and time is saved for the overall downward putting process. The high-altitude operation amount is decreased during construction. Original upper-layer ring beams are used as a downward putting platform, and integral underwater downward putting of the lower-layer ring beams is achieved.

The invention relates to a vertical swiveling construction method of a dual-steel-arch tower, belonging to the field of bridge construction. A vertical swiveling construction mode is adopted in the vertical swiveling construction method which is characterized in that the vertical swiveling construction of dual steel arcs is realized by utilizing the self durable structure of a bridge. The method comprises the following steps of: firstly, mounting a plate-lifting tripod, a steering cable saddle and a steel stranded wire on an inner arch tower for vertically swiveling an inwards arch tower and finishing the welding of an annual welding line of the inwards arch tower; then, carrying out the swiveling construction on an outer arch tower: firstly penetrating the plate-lifting steel stranded wire through the steering cable saddle on the inwards arch tower before construction and carrying out the vertical swiveling construction on the outer arch tower by utilizing the inwards arch tower as a support for swiveling the outer arch tower; and finally, finishing the welding of the annual welding line of the outer arch tower. The invention has the advantages of simple construction, high mounting accuracy, convenience of welding, quality guarantee, smaller danger, less overhead operation, low manufacture cost, short construction period, high construction efficiency, and the like.

The invention provides a device and method for constructing an assembled crossing frame. The device and method are characterized in that the crossing frame comprises a tower base, a middle section and a tower head which are sequentially arranged in the vertical direction; the device comprises a jacking frame, a control device, a rope collecting and releasing mechanism and a power source; the rope collecting and releasing mechanism comprises two layers of stay wires which are symmetrically arranged on two sides of the tower head and two sides of the middle section respectively, and steering blocks and tension sensors are arranged between the stay wires and the rope collecting and releasing mechanism respectively; the jacking frame, the synchronous control device and the rope collecting and releasing mechanism are connected with the power source respectively. Compared with the prior art, the device and method for constructing the assembled crossing frame have the advantages that an inverted assembly mode is adopted, so that the quantity of aerial work is reduced, and safety is high; an assembly mode that the middle section is jacked hydraulically is adopted, so that tower assembly construction efficiency is high, and labor intensity of construction workers is relieved; it is guaranteed that the crossing frame is perpendicular to the horizontal plane all the time in an assembly process and after assembly is finished.

The invention relates to the field of building materials. In order to be adapted to housing industrialization, the invention discloses a prefabricated cast-in-place combination type superposed shear wall which comprises an outer wall layer, a heat insulating material layer and an inner wall layer, wherein the heat insulating material layer is located between the outer wall layer and the inner wall layer, and the outer wall layer and the inner wall layer are connected through tie bars or connectors; the inner wall layer comprises a prefabricated part and a cast-in-place part, the prefabricated part of the inner wall layer is basically located at the middle portion of the outer wall layer, the area of the prefabricated part of the inner wall layer is smaller than or equal to that of the outer wall layer, and the prefabricated part of the inner wall layer reserves lateral and longitudinal reinforced steel bars; and the outer wall layer, the heat insulating material layer and the prefabricated part of the inner wall layer are made into a whole in advance; and the prefabricated part reserves the lateral and longitudinal reinforced steel bars to be anchored into the cast-in-place part of the inner wall layer. The invention has the advantages of improved building quality, energy saving, environmental protection, short working period, industrial production and increased construction safety.

The invention relates to a high-altitude large-span curved roof hydraulic lifting construction method, and belongs to the technical field of structural engineering steel structures. A high-altitude large-span curved roof hydraulic lifting device comprises a curved roof, wherein the curved roof comprises truss upper chords, roof surfaces and truss lower chords; a plurality of roof support columns are arranged on the lower end surfaces of the truss lower chords; a plurality of hydraulic lifting assemblies are arranged between the roof support columns; a plurality of lifting frames arranged at equal intervals are uniformly arranged at the periphery of the curved roof; lifting platform frames are arranged on the lifting frames; hydraulic lifters are arranged at the front ends of the lifting platform frames; steel structure lifting appliances which are in lug type pin connection with the truss upper chords are arranged below the hydraulic lifters; and steel strands which are connected withthe hydraulic lifters in a movable and sleeved manner are arranged between the hydraulic lifters and the steel structure lifting appliances. The construction method has the advantages of large liftingtonnage, short construction period, large operation space, reduction of high-altitude operation volume and reduction of safety risks, and solves the problems of large high-altitude bulk welding volume, large operation risks and unstable construction quality.

The invention discloses a straddle-type temporary cable self-balancing push-type cable change underpinning apparatus for suspension bridge cables and belongs to the technical field of maintenance andreinforcement engineering of civil engineering suspension bridges. The straddle-type temporary cable self-balancing push-type cable change underpinning apparatus for suspension bridge cables comprisesa main cable that is inclined; steel box girder (13) is arranged blow the main cable; lugs are arranged on the upper surface of the steel box girder (13); the main cable is provided with a pluralityof permanent cable clamps; the top end of a permanent cable is connected with each permanent cable clamp; the bottom end of each permanent cable is connected with one lug; each lug is provided with apinhole. The straddle-type temporary cable self-balancing push-type cable change underpinning apparatus for suspension bridge cables helps solve the problem that cables are difficult to change when each cable lug of a suspension bridge has only one hanging hole, the fact that multiple-point lifting is carried out change one cable is avoided, aerial operation quantity is low, construction is simple, and the line shape and internal force of existing suspension bridge main cables and stiffening beams are less perturbed.

The invention discloses a synchronous jacking construction method for a large-span steel roof truss by multiple hydraulic equipment, and relates to the technical field of building construction. The synchronous jacking construction method comprises the following steps of arrangement and projection of jacking points of a jacking area, truss assembly, welding, truss lifting, preparation work before hydraulic jacking, steel roof truss overall synchronous jacking, construction quality inspection and jacking equipment unloading; and through the synchronous jacking construction method, the large-spansteel roof truss is simultaneously jacked up by the multiple hydraulic equipment, and the effects of shortening the construction period of the entire long-span steel roof truss, improving construction safety and construction quality and reducing construction cost are achieved.

The invention relates to high curved-surface net racks, particularly to a lifting and installation method of high curved-surface net racks, which can be applied in building steel structures. The lifting and installation method proceeds according to the processes of a lifting preparation stage and a lifting stage. According to the lifting and installation method of high curved-surface net racks, the structure is compact, the requirements for mechanical equipment is low, the construction efficiency is improved, the construction cost is reduced, and the construction safety is improved.

The invention discloses a bent cap supporting safety system. The device comprises a steel bar (1), supporting platform (2), i-shaped steel (3), a support adjusting device (4), logic controller (5), wherein the steel bar (1) comprises a front half part (11) and a rear half part (12); the rear half part (12) is pre-buried in the side surface of the pier and penetrates through the axis of the pier; the supporting platform (2) is tightly attached to the side surface of a pier, the front half portion (11) is exposed out of the side surface of the supporting platform (2), the supporting adjusting device (4) is arranged on the upper surface of the supporting platform (2), the I-shaped steel (3) is arranged on the upper surface of the supporting adjusting device (4), and the logic controller (5) is electrically connected with the supporting adjusting device (4). A supporting adjusting system is arranged, automatic synchronous adjustment is achieved, and high-altitude operation is reduced; thelongitudinal gradient is convenient to adjust by adopting the adjusting rod; after the cover plate template is installed, data collection is carried out in real time, and an alarm is given at the first time when a settlement problem occurs.

The invention discloses a large-span combined type overload eccentric slope angle steel structure integrated synchronous jacking construction method. The method comprises the following steps that 1, acorresponding number of jacking foundations are constructed on a terrace according to a plurality of set jacking point locations; 2, after the terrace is hardened, ground splicing and acceptance inspection of combined steel structures are performed; 3, jacking equipment is installed, and jacking is performed; 3.1, ground assembling of crossed joists is performed on the multiple set jacking pointlocations; 3.2, the crossed joists are lifted to the positions of net rack upper chord balls; 3.3, hemispherical hinged supports are concentrically welded to the bottoms of the crossed joists; 3.4, the combined steel structures achieve supporting conversion from net rack lower chord balls supported by buttresses to the net rack upper chord balls supported by jacking frames through a jack; 3.5, synchronous jacking is performed; 3.6, supplementing and splicing installing of net rack support position balls and connecting rod pieces thereof can be performed, and then the whole structure falls backin position. Overhead operation can be greatly reduced, and safety and reliability are achieved.

The invention discloses a construction method for a large-span overhung ultra-limit structure. The method includes the following steps that 1, construction unit classification is carried out on the ultra-limit structure, wherein the internal part of the structure and a middle strip block of an upper steel structure of the overhung part of the structure are classified as a first construction unit, and the rest part of the overhung part is classified as a second construction unit; 2, construction of the first construction unit is completed on a tower floorboard through a high-altitude assembly method and a cantilever installation method; 3, construction of the second construction unit is completed through integral lifting and slipping after integral lifting. According to the method, the multiple technologies of high-altitude assembly, integral lifting, slipping after integral lifting and the like are adopted, labor time is shortened, material expense and equipment expense are reduced, and the requirement for integral control over the construction technology, quality, safety, progress, cost and the like is met.

The invention belongs to the technical field of steel structure building hoisting methods, and particularly relates to a hoisting method for a modular vault-type space tube truss steel structure system building. A modular unit of two or more steel trusses is divided into combinations with two or three sections, a ground splicing mode is adopted, all modular assemblies with steel structures are assembled into a plurality of unit bodies, then the several unit bodies are spliced into a combination, and a hoisting mode of simultaneous closing of the multiple high-altitude trusses is adopted. The aloft work processes such as truss and tie bar hoisting and high-altitude tie bar screwing and high-strength bolt fastening are reduced, the using machine-team of a crane is greatly reduced, because ofthe hoisting mode of the combinations, the working face is large, after multi-station truss hoisting is completed, the safe stability can be good, boundary dimension deformation of the trusses is small, all hole positions of high-strength bolts can be ensured, and the later bar filling process is facilitated.

The invention discloses vertical lifting type communication maintenance equipment, and belongs to the technical field of communication equipment. The vertical lifting type communication maintenance equipment comprises two oppositely-arranged stand columns, the opposite sides of the two stand columns are slidably connected with a lifting workbench, the top of the lifting workbench is fixedly connected with a first screw, the outer side walls, close to the top ends, of the stand columns are further provided with driving motors, the driving ends of the driving motors are connected with the lifting workbench through mooring ropes, the outer side walls, close to the top ends, of the stand columns are fixedly connected with symmetrically-distributed nut bases through supports, and a second screwis in threaded connection with the interior of each nut base. According to the vertical lifting type communication maintenance equipment, the automatic separation function of an outer communication box in the ascending process of the lifting workbench is achieved, the locking function of alignment embedding of the outer communication box is achieved through the dead weight of an inner communication box, the embedding stability of the outer communication box is improved, the excellent protection performance of the outer communication box is kept, the efficiency of high-altitude disassembling of the damaged communication box is improved, and the danger under high-altitude operation is reduced.

The invention provides a corridor mounting method and a corridor, and relates to the technical field of constructional engineering. The corridor mounting method avoids erecting a large number of supporting measures, saves materials and labor cost, reduces high-altitude operation amount and improves construction safety by means of a construction mode of hoisting components such as a first main rodpiece, a second main rod piece, a vertical structure, a horizontal structure and an inlaying section. Temporary measures such as embedding sections and chain blocks are used, so that the constructionsafety of the corridor steel structure is improved; and finally, the steel structure is unloaded in the installation process, so that the installation stability, the installation precision and the stability after unloading of the steel structure are ensured.