513 results about "Falsework" patented technology

The invention discloses a press-in type open caisson construction method based on an automatic control system. The automatic control system comprises a data acquisition module, a data analysis and decision module and an execution control module. The data acquisition module is used for collecting data in the sinking process of the open caisson in real time, the data analysis and decision module analyzes the collected data in real time and generates a control instruction, and the execution control module regulates and controls the pressure sinking equipment and the soil sampling equipment according to the control instruction; the construction method comprises the following steps: constructing a ground anchor pile; isolation pile construction; construction of the open caisson: surveying and setting out, excavating a foundation pit, laying a sand cushion layer, laying a concrete cushion layer, constructing a brick moulding bed, erecting a scaffold, erecting a template, binding reinforcing steel bars and pouring concrete; pressing and sinking the open caisson; according to the method, an automatic control system is adopted, various parameters in the open caisson construction process can be monitored and adjusted in real time, uniform sinking of the open caisson is achieved through accurate control over the parameters, and the construction precision and quality are improved.

A portable, handheld system designed for anchoring and securing ladders, pump jack scaffolding, and walkways on pitched roofs or inclined surfaces. The invention includes three platform configurations, each with a variable pitch adjustment for leveling across multiple roof angles: (1) a ladder stop platform equipped with a 360-degree stop mechanism for multi-directional ladder stabilization; (2) a pump jack platform that provides a stable base for supporting pump jack systems and scaffolding; and (3) a walkway platform configured with parallel plank attachment bars and integrated guardrails for safe foot traffic. Each platform features anchor beds for secure attachment to structural elements like roof trusses and reinforced lateral rib members for uniform load distribution, enhancing structural integrity and load-bearing capacity across the system.

The present invention relates to the field of building construction, and in particular to a method for installing square tubes of a double-helix rising double-twisted cantilever steel structure on a facade. A detailed design is first performed. The construction method can effectively connect and fix the cantilever steel main beam to the main structure cylinder by welding through the arc-shaped embedded parts, thereby facilitating the subsequent welding and fixing of the cantilever steel side beam and the cantilever main beam. In addition, the hand chain hoist and the automobile crane lifting method are provided, so that the construction process of the cantilever steel structure on the facade is innovatively adopted in the process of concrete main structure construction. The construction method of synchronous interlacing and coordinated lifting and installation solves the problem that the facade scaffolding and cantilever floor support frame affect the lifting and installation of the cantilever steel structure components on the facade of the high-rise building during the civil construction process. While improving the processing quality of the double-helix rising double-twisted cantilever steel structure on the facade, the construction period of the lifting and installation of the facade steel structure is greatly shortened, and the economic benefits are remarkable.

The application discloses the technical field of building construction, in particular to a post-pouring zone independent support system and an implementation method, which adopts a post-pouring zone first formwork support system to erect a jacking support together with a scaffold and a wooden formwork, cracks and water seepage at a stress position after jacking after the formwork is removed are prevented, and hidden problems are prevented from occurring, through jacking treatment of a top support plate at the top of an inclined support and a vertical support rod two, the jacking and blocking effect of the post-pouring zone is ensured, the blocking effect is ensured by mutually splicing the blocking plates to form a whole, and the vertical height of the vertical support rod one and the vertical support rod two is adjustable to ensure the adaptation to various jacking heights. The post-pouring zone formwork support system after jacking after the formwork is removed can not find cracks and water seepage at a stress position after jacking after the formwork is removed, but the root problem cannot be solved, and only the speed of cracks at the stress position can be temporarily delayed, but various subsequent problems will gradually appear, and normal use is affected.

The invention relates to the technical field of building construction safety, in particular to an outer frame hard protection structure and a construction method thereof.The outer frame hard protection structure comprises a pedal, the pedal is flatly laid on a cross rod of a scaffold, a first baffle is arranged on the side, away from a main body structure, of the pedal, and a second baffle is movably arranged on the side, close to the main body structure, of the pedal. Through assembly of the pedal and the baffles on the two sides, rapid installation can be achieved, the impact resistance and the wind pressure resistance of the outer frame protection structure are improved, small objects are effectively prevented from falling down, and the construction safety is improved; local looseness or separation from a main body structure caused by construction vibration can be avoided.

The steel formwork hydraulic jacking construction method of the heat absorption tower concrete structure comprises the following steps that the first section of tower wall of a heat absorption tower is constructed, a plurality of steel cylinders are inserted into the first section of tower wall of the heat absorption tower in the circumferential direction, and concrete is poured to embed the steel cylinders; scaffolds are erected inside and outside the heat absorption tower respectively; a center drum is assembled in a heat absorption tower, a plurality of steel channels are installed on the top of the first section of tower wall of the heat absorption tower, the center drum is fixed through the steel channels, steel rings are jointly installed at the bottoms of all the steel channels, one jack is fixed to the top of each steel channel, and each jack is correspondingly fixed to one steel cylinder; a stay cable is installed between the channel steel and the central drum, and a hanging bracket is installed on the channel steel; wood formworks are fully laid on the tops of the steel channels, and derrick masts are arranged on the wood formworks; a hydraulic system is installed on the wood formwork; jacking the first section of tower wall of the heat absorption tower, continuously connecting the steel cylinder to the top of the steel cylinder after jacking, and circulating the operation until all jacking work is completed; in the jacking process, the load is greatly reduced, and the construction period is shortened.

The invention discloses a large cantilever concrete structure formwork layered anchor pulling construction method and an intelligent monitoring system, and particularly relates to the field of building construction.The large cantilever concrete structure formwork layered anchor pulling construction method comprises the steps that a 16 # I-steel cantilever heavy frame is installed by pre-burying a high-strength bolt sleeve and conducting three-dimensional positioning; the first to sixth rows of frame bodies are erected layer by layer, a secondary top layer is poured, and the first to fourth phi-20 flower basket pull rods are sequentially installed after top layer concrete is poured; then main and secondary keels and an adjustable jacking are installed, a formwork is laid, and the elevation is corrected to be + / -3 mm; steel bar numerical control machining straight thread connection and water and electricity pre-burying are synchronously completed; arranging a vibrating wire strain gauge, a spoke pressure gauge and a tilt angle sensor, uploading data to the BIM in real time, and establishing load-deformation dual-threshold early warning; after the formwork is removed, a scaffold and a main body structure are tied and reinforced in time at the upturning ridge of the eave gutter on the top layer of the concrete structure according to a wall connecting piece method through steel pipe fasteners; the formwork and the outer protection frame are integrated, concrete is poured twice, early warning and alarm linkage are achieved, and safety and high efficiency are achieved.

The invention discloses a collaborative supervision method and system for a construction project, and relates to the technical field of construction project supervision, and the method comprises the steps: obtaining various types of basic information of the construction project; and based on the real-time change characteristics of various types of information in the basic information, determining differential collaborative supervision period information. According to the collaborative supervision method and system for coping with the construction project, the collection points covering the whole range of the construction area are used; four types of core information including engineering design data such as a structure change list, a construction progress record such as process connection time, a material quality certificate such as a steel bar mechanics detection report and an on-site safety inspection result such as a scaffold acceptance record are synchronously obtained, and accurate classification is carried out according to features; the collaborative acquisition of the multi-source information thoroughly changes the one-sidedness in the traditional supervision; in the residential building construction process, a supervisor can rapidly position the root cause of the problem, namely insufficient personnel qualification instead of materials, by integrating the material information and the safety information, and misjudgment caused by single information is avoided.

The utility model relates to the technical field of building equipment, in particular to a climbing frame support fixing device for a split-level building structure, which is characterized in that a base is fixed on the horizontal ground through a through-wall lead screw to enable the equipment to have a stable foundation plane, and a vertical upright post is arranged at the front end of the base through a connecting bolt; then the long inclined struts are in inclined lap joint with the base and the stand column to form a stable triangular structure, all the components are stably connected through connecting bolts, the wall-attached supports are arranged at the upper end of the stand column and the horizontal plane end of a base installation layer respectively, and after vertical response is formed, construction and installation of the next link of the scaffold are facilitated.

The utility model relates to the technical field of building construction, and discloses a detachable conveying device and a feeding system, which comprise a support, a conveying device and a feeding device, the sliding rail comprises at least two rails, and the at least two rails are fixedly connected to the support in parallel; the transport vehicle comprises pulleys and a bottom plate, the pulleys are arranged below the bottom plate, and the pulleys are suitable for moving along the sliding rails. According to the detachable transportation device, existing construction materials on a construction site are assembled into the detachable transportation device, the construction materials can be conveniently transported inside and outside a building after the top of the building is sealed, the structure is simple, and the cost is low.

The utility model relates to the field of bridge construction, in particular to a built-in totally-enclosed operating platform for a thin-wall hollow pier. Comprising a shaft platform and a plurality of supporting pieces, the supporting pieces are distributed on the same horizontal plane along the inner side of the hollow pier, and the shaft platform is placed on the supporting pieces; the shaft platform comprises an outer frame, a plurality of main beams evenly distributed in the inner space of the outer frame and a table top laid on the upper surfaces of the main beams and the outer frame. The corbel is simple in structure, the shaft platform and the corbel body can be prefabricated in advance, the whole corbel is installed and detached through hoisting, efficiency is improved, meanwhile, dangerous operation such as binding at high altitude is omitted compared with a traditional scaffold and other modes, and safety of operators is improved; and the area of the shaft platform can occupy the inner side space of the whole hollow pier, so that the operation space is effectively increased.

The invention discloses a construction technology of a squat silo top formwork system, and belongs to the technical field of silo construction, and the construction technology comprises construction of a conical shell top plate supporting system, and comprises the following steps: reserved hole construction: when a silo wall slip form is constructed to an elevation, a plurality of reserved holes are uniformly distributed in a silo wall along the circumferential direction; mounting a central upright post, hoisting the central upright post to a foundation at the central position of the warehouse, arranging four cable ropes for temporary fixation, then erecting double-row scaffolds around the upright post, and carrying out column embracing connection by using steel pipe fasteners and a central steel pipe every 1.5 meters; a top conversion platform is installed, the assembled conversion platform is lifted to the top of the center stand column through a tower crane, and the conversion platform is in bolt connection with the center stand column through a round pipe; bailey frames are installed, the two sides of one end of each Bailey piece are welded to the conversion platform through channel steel to limit sliding of the Bailey beams, the other end of each Bailey piece is placed at the reserved hole of the bin wall, and the Bailey beams are placed in the central symmetry direction in sequence. The stability of the supporting system is improved.

The present invention relates to the field of bridge construction equipment, and specifically discloses an assembled steel pipe falsework support assembly, including: a support column, a hoop assembly installed on the support column, a cross brace and a diagonal brace are fixedly connected to the hoop assembly through a gusset plate, a suspension assembly is installed on the hoop assembly, a hook portion is provided on one side of the cage ladder, and the hook portion can be detachably suspended on the suspension assembly, and sleeves and joints are provided on the cage body. By arranging two or more hoop bodies on the hoop assembly and connecting them with the cross brace column and the diagonal brace column through the gusset plate, the connection strength of the support structure is ensured; and by installing a suspension assembly on the hoop body to install a detachable cage ladder, and the spliced cage ladder can be increased according to the increase in the height of the support column, and the cage ladders are mutually installed through the sleeves, which not only ensures the strength and reliability but also improves the overall maintainability of the falsework.

A jig frame supporting system of a special-shaped large-section annular prestressed concrete structural beam comprises a bearing platform, stand columns and stand column connecting rods, the stand columns are connected through the stand column connecting rods to form a frame body, and the bearing platform is arranged at the top of the frame body. The bearing platform is used for temporarily bearing the weight of the special-shaped large-section annular prestressed concrete structural beam and the template system thereof; the column connecting rod is horizontally or obliquely arranged; the bearing platform comprises profile steel keels arranged in a crisscross manner, and the bottoms of the profile steel keels are fixedly connected with the vertical rods through bolts; the bearing platform is connected with the stand columns through bolts, and the stand columns are connected with the stand column connecting rods through bolts. Compared with an existing plate buckle type scaffold supporting system, the jig frame supporting system has the advantages of being small in overall weight, high in bearing capacity, convenient to produce in batches, convenient and fast to install and low in labor requirement.

The utility model relates to a temporary safety channel for an assembly type stair. The temporary safety channel comprises a supporting assembly and a stair assembly. A containing cavity is defined by the supporting assembly, the step assembly is arranged in the containing cavity, the first end of the supporting assembly is used for being placed on a rest platform of the (n-2)-th layer of stairs, the second end of the supporting assembly is used for being placed on a floor platform of the (n-1)-th layer of stairs, and the third end of the supporting assembly is used for being connected with a hoisting device; wherein n is a natural number greater than 2; compared with a scaffold erected between an upper floor and a lower floor, the construction efficiency is improved, and meanwhile potential safety hazards are reduced.

The invention discloses an in-situ cast-in-place construction process for a pre-tensioning method prestressed arch slab roof of a large-span granary. Comprising the following steps that S1, a pre-tensioning method pedestal is cast in situ or a prefabricated pre-tensioning method pedestal is used; s2, a pre-tensioning method pedestal is poured; s3, pre-stressed tendons are tensioned through a pre-tensioning method pedestal; s4, building a template of the arch slab roof; s5, dismounting a pre-tensioning method pedestal and a template; an all-round scaffold is erected on the hardened ground in the granary, in-situ cast-in-situ slab construction is carried out, the integrity of the arch slab is guaranteed, and the quality is good; according to the arrangement of a cast-in-place pre-tensioning method pedestal or a prefabricated pre-tensioning method pedestal, the construction quality is ensured, formwork building is conveniently conducted on the arch slab roof, prestressed tendons are installed on the pre-tensioning method pedestal, formwork supporting and fixing are achieved, and due to elastic retraction of the prestressed tendons, the formwork can be fixed through the bonding effect between the prestressed tendons and concrete, the formwork can be fixed, and the formwork can be fixed. And the concrete obtains pre-compressive stress, and the integrity and the high quality of the arch slab roof are improved.

The utility model discloses a heavy eave hilly top roof overhanging structure formwork supporting system which comprises a plurality of main supporting steel beams located at a roof overhanging position, a formwork supporting frame and a roof overhanging structure formwork, the main supporting steel beams are distributed in parallel along the horizontal plane, one end of each main supporting steel beam is fixedly connected with a top floor, and the other end of each main supporting steel beam is fixedly connected with the formwork supporting frame. The other ends of the main supporting steel beams extend to the outer portion of the top floor and are distributed in an overhanging mode. A plurality of auxiliary supporting steel beams perpendicular to the main supporting steel beams are arranged at the positions, above the cantilever ends, of the main supporting steel beams, the formwork supporting frame is arranged above the auxiliary supporting steel beams, the roof cantilever structure formwork is fixed to the top of the formwork supporting frame, and a scaffold of a double-row outer frame structure is erected on the outer side of the formwork supporting frame. The lower portion of the scaffold is connected with the main supporting steel beam. The formwork supporting device is simple in structure, low in erecting difficulty and high in safety, and the formwork supporting problem of cantilever structures of multi-layer, high-layer and small high-layer roofs is solved.

A detachable open caisson internal operation platform relates to the technical field of municipal engineering construction, is arranged on the inner side of the side wall of an open caisson, and comprises a plurality of upper preformed holes which are transversely and uniformly formed in the inner side of the side wall of the open caisson at intervals and a plurality of lower preformed holes which are transversely and uniformly formed in the inner side of the side wall of the open caisson at intervals, the operation platform further comprises platform supports which are detachably matched with the upper preformed holes and the lower preformed holes in an inserted mode, and a scaffold is erected on the multiple platform supports to form the operation platform. The platform support is convenient to assemble and disassemble and can be repeatedly used, the upper preformed hole and the lower preformed hole are small, the open caisson structure cannot be damaged, waterproof construction is not affected after plugging, and the platform support is simple and compact in structure and high in practicability.

This invention discloses a construction method for cast-in-place box girder spanning an existing overpass, comprising the following steps: Step 1: Construction preparation stage, including foundation treatment, formwork processing, and steel reinforcement processing; Step 2: Erection and reinforcement of full-span scaffolding. First, the scaffolding is erected. After the scaffolding is erected, the bottom formwork and outer side plates of the box girder are installed. Then, the scaffolding is pre-stressed. After unloading, the elevation of the bottom formwork is adjusted as needed. Finally, the inner side formwork and the bottom formwork of the top plate of the box girder are installed; Step 3: Casting of the box girder. After the entire cross-section of the box girder is cast, it is cured. Tensioning is performed when the concrete strength reaches 85% of the design strength, and finally, grouting is carried out; Step 4: Dismantling of the scaffolding. In this invention, disc-lock full-span scaffolding is used to reinforce existing highway bridges. Disc-lock full-span scaffolding is then erected on top of the existing highway bridge as cast-in-place scaffolding. Installation and dismantling are convenient and can save construction time.

The utility model discloses a lining construction formwork supporting system for a TBM marshalling train rail-mounted area of a subway station. The device comprises a movable door frame and a full disc buckle type scaffold, the movable door frame is arranged in a rail-mounted area in a crossing mode and comprises a plurality of door-type steel frames which are arranged at intervals and connected into a whole, lower cross beams are arranged on the lower portions of stand columns on the two sides of the movable door frame, and H-shaped rail wheels are arranged on the lower portions of the lower cross beams. The movable gantry is movably arranged on gantry steel rails arranged on the two sides of a track area through H-shaped track wheels, a plurality of inclined struts are arranged at the bottoms of the two sides of the movable gantry at intervals, one end of each inclined strut is fixedly connected with a lower cross beam of the movable gantry, and the other end of each inclined strut is fixed to the ground through two reinforcing steel bars which are 25 mm in diameter and implanted into a hardened face. The all-round disc buckle type scaffold is erected on the outer side of the movable portal frame, the all-round disc buckle type scaffold in the rail-mounted area range is located on an upper cross beam of the portal steel frame, and formworks at the position of a station side wall are horizontally and oppositely supported through steel pipes.

The invention discloses an assembly type dense rib rapid assembling and disassembling combination system which comprises a formwork, a formwork, a jacking and a transverse supporting steel pipe. The mold shell is provided with a cavity with a downward opening, the lower edge of the cavity horizontally extends outwards to form a flange edge, and a groove extending along the edge is formed in the upper side of the outer edge of the flange edge; the lower surfaces of the multiple mold shells are coplanar and arranged in a matrix mode. The two ends, in the width direction, of the formwork are erected on the bottoms of the grooves of the two adjacent formwork shells correspondingly, and the formwork and the flange edges are fixed through nailing type connecting pieces. The top supports are arranged below the corners of the four mold shells forming the square block; the transverse supporting steel pipes are laid on the top supports, each top support is correspondingly provided with two transverse supporting steel pipes, and the two transverse supporting steel pipes abut against the lower side faces of the flange edges of the two adjacent mold shells in a one-to-one correspondence mode. The method has the beneficial effects that the defects of edges and no edges are reduced, a traditional wood formwork is saved, slurry leakage is avoided, formwork reversing is convenient, cleaning and sanitation are facilitated, the formwork shell is not prone to being damaged during disassembly, cost is saved, assembly and disassembly are fast, labor is saved, the using amount of scaffolds and plate buckles is low, concrete is saved, and it is guaranteed that the secondary beams and the edge beams are not damaged by formwork removal, and the attractive state is not damaged.

The invention relates to the technical field of building formwork erecting, in particular to a steel-concrete combined type floor formwork erecting construction method which comprises the following steps that a formwork is arranged below an upper flange plate of a steel beam, the formwork extends into the lower portion of the upper flange plate of the steel beam, and a sponge strip is arranged between the upper flange plate of the steel beam and the formwork; secondary keels are arranged below the formwork and are parallel to the steel beams at equal intervals, and the secondary keels are fixedly connected with the formwork; the height of the main keel and the height of the vertical supporting mechanism are determined, the main keel is perpendicular to the secondary keel and tightly attached to the lower portion of the secondary keel, the vertical supporting mechanism is adopted to abut against and fix the main keel, and the bottom of the vertical supporting mechanism is supported on the top face of a lower flange plate of the steel beam; after the formworks are erected, steel bar meshes are laid on the formworks, and finally concrete is poured; and after the floor support plate reaches the corresponding standard strength, the vertical supporting mechanism, the main keel, the secondary keel and the formwork are sequentially dismantled. Scaffold supporting is not needed below the formwork, aloft work is reduced, the construction speed is increased, and cost is saved.

The invention discloses a plain concrete pile foundation support cast-in-place beam and a construction method thereof, and the construction method comprises the steps of firstly constructing plain concrete piles and erecting a strip-shaped foundation, constructing a supporting support on the strip-shaped foundation, erecting a plate buckle scaffold on the supporting support, and then erecting a beam template and constructing a beam body structure. The problem that the bearing capacity of a cast-in-place bridge construction foundation is insufficient under the deep soft foundation geological condition can be effectively solved, the construction technology is complete, the construction process is safe, quality control is effective, follow-up large-area plain concrete pile support cast-in-place beam construction can be effectively guided, driving movement can be conducted through the carrying and moving mechanism structure, and the construction efficiency is improved. And during moving, the whole parts can be moved, so that the moving is more efficient and convenient, the whole body can be effectively ensured, and the subsequent building construction is more convenient.

The invention relates to a force transmission device supported by cantilever I-shaped steel and a vertical rod. The force transmission device aims at improving the force transmission efficiency and stability of a scaffold system in high-rise building construction. The device comprises overhanging I-shaped steel, a scaffold and a force transmission device. One end of the overhanging I-shaped steel is fixed on a building structure layer, and the other end is overhung and connected with the scaffold. Through holes are formed in the positions, corresponding to the web plates, between the top plate and the bottom plate, and the positions of the through holes correspond to scaffold vertical rods. The force transmission device is composed of two symmetrically-arranged hydraulic clamping mechanisms which are located on the outer sides of the webs respectively, and the upper ends and the lower ends abut against the I-shaped steel top plate and the I-shaped steel bottom plate. A scaffold vertical rod penetrates through the through hole and is clamped by the hydraulic clamping mechanism, and a force unloading ring is arranged below the vertical rod and abuts against the I-shaped steel bottom plate. According to the device, the stability of the scaffold is improved through a force transmission mode of the vertical rod, the clamp, the cantilever I-shaped steel and the building structure layer, a reasonable unloading mode is achieved, and the stability of the whole scaffold structure is enhanced.

The utility model discloses a building hoist bridgehead transition slab device with side protection in the technical field of building construction, which comprises a bottom plate, a fixing plate is hinged to the right side of the bottom plate, guardrails are arranged on the front side and the rear side of the top of the fixing plate, a top plate is arranged in front of the top of the bottom plate, and a control mechanism is arranged on the top of the top plate. A first rotating mechanism is arranged at the top of the control mechanism, a second rotating mechanism is arranged on the left side of the front guardrail, a connecting plate is arranged between the first rotating mechanism and the second rotating mechanism, two sets of mounting plates are arranged on the front side and the rear side of the bottom plate correspondingly, and mounting holes are formed in the tops of the four sets of mounting plates correspondingly; the guardrail comprises two sets of supporting side plates, and the two sets of supporting side plates are both arranged at the top of the fixing plate. The problems that a gap between a construction hoist and a building cannot be completely sealed when a scaffold is erected, potential safety hazards exist, the construction cost is large, and the construction period is long are solved.

The application discloses a bridge maintenance platform and a maintenance method, wherein the bridge maintenance platform comprises a longitudinal support beam and a walking mechanism slidingly installed on the longitudinal support beam; the longitudinal support beam is horizontally arranged and fixedly connected with a bridge; a manned lifting mechanism is hung below the walking mechanism; and the walking mechanism drives the manned lifting mechanism to move horizontally along the longitudinal support beam. The bridge maintenance platform can be fixed on the bridge, does not affect the traffic on the bridge and the navigation under the bridge, can be fixed on the bridge for a long time, can be used for the bridge inspection and maintenance at any time, and the staff can stand on the bridge maintenance platform to control the movement of the bridge maintenance platform to conduct the dead angle-free inspection and maintenance on each part of the bridge without the need of erecting a scaffold, thereby saving time and effort. The bridge maintenance platform is not affected by the traffic on the bridge and the topography and geomorphology under the bridge, and is suitable for the maintenance of various bridges.

To provide formwork structure capable of supporting vertical load and horizontal load acting on formwork when concrete is placed, with simple constitution.SOLUTION: Form structure 40 is for constructing a slope portion of an arch member of an arch bridge by using concrete 32. The form structure 40 includes: a falsework that supports a bottom falsework 50 upon concrete placement; PC steel material 44 which is arranged in such an inclined manner that it is orthogonal to the slope of the slope portion and which has an upper end portion fixed to a meran material 31 and a lower end portion fixed to the falsework; and beam material 46 which is arranged between the meran material 31 and the falsework and bears compressive force accompanied with tension of the PC steel material 44.SELECTED DRAWING: Figure 5

The utility model relates to the technical field of building engineering, concretely relates to the optimization design of the structure of external scaffold and steel sheet net connecting device, the utility model is realized through the following technical scheme: a kind of external frame steel sheet net connecting device, including connecting steel pipe and connecting plate, the one end of connecting steel pipe is provided with the slot for the insertion of connecting plate along its length direction, and the slot extends the clamping interface of connecting steel pipe in the circumferential direction;Connecting plate includes the horizontal main part of part insertion in the connecting steel pipe, and the convex part of the clamping interface resistance cooperation that is outwardly extended horizontally from horizontal main part. The utility model aims at the improvement of the structure of connecting steel pipe and connecting plate itself, the stable connection of both can be realized without additional connecting bolt, eliminate the security risk caused by bolt drop, enhance the security and stability in construction process.

The application relates to a wall reverse construction method and a construction device, and relates to the technical field of building wall construction. In order to solve the problem that it is inconvenient to convey blocks to a high scaffold for wall construction by construction personnel, the device comprises a base, a construction platform, a guide pipe and a lifting arm. A plurality of moving wheels are arranged on the base. The construction platform is arranged on the base in a liftable mode. The guide pipe is vertically arranged on the base. One end of the guide pipe is telescopically connected to a floor slab. The lifting arm is slidably arranged on the guide pipe and is used for conveying blocks. The application has the effect that the construction personnel can conveniently perform block laying work on the wall at a high position.

This invention belongs to the field of bridge maintenance technology and proposes a method for reinforcing cracks in bridge corbels, including the following steps: S1. Scaffolding erection; S2. Bridge bottom surface cleaning; S3. Vertical drilling of the bridge; S4. Erection of the reinforced box girder; S5. Fixing of the reinforced box girder; S6. Side formwork erection; S7. Grouting; S8. Formwork removal; S9. Groove filling and post-construction maintenance. This invention provides a strong support to the original bridge bottom surface by reinforcing the box girder and injecting reinforcing grout into the cracks and grouting cavities. After the grout solidifies, it not only repairs the damaged cracks inside the corbel but also tightly bonds the reinforced box girder, the solidified grout, and the original bridge structure together, improving the reinforcement effect and overall load-bearing capacity of the bridge corbel.