149 results about "Falsework" patented technology

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 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.

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.

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.

The utility model discloses a support-free detachable fixed template application structure applied to an assembly type structural system, which comprises a prefabricated truss reinforced concrete lower chord member, a floor slab prefabricated layer, more than one group of connecting supports and through fixing bolts, the connecting supports are arranged on the two sides of the prefabricated truss reinforced concrete lower chord side by side, a space used for pouring the truss reinforced concrete upper chord is formed between the opposite connecting supports, the connecting supports are installed on the prefabricated truss reinforced concrete lower chord through oppositely-penetrating fixing bolts, and the floor slab prefabricated layer is connected to the upper portions of the connecting supports in a lap joint mode. By the adoption of the method, a part of or even all scaffolds can be omitted, and the detachable standard connecting support designed in the utility model can be used as a temporary support of a main beam cast-in-place part side mold and a floor slab at the same time, and is fixed on a main beam prefabricated part through a split bolt; and the split fixing bolts in the cast-in-place height range can be accurately positioned according to the width requirement and support is formed.

The application discloses a kind of steel building body arc piece connection construction method, comprising: the following arc steel beam piece is stressed whole to the arc steel beam piece on top and is supported, to present the construction process of the fixed pull tie system of steel building body arc piece.The arc steel beam piece of lower side is connected and positioned by spot welding plate and steel structure building body side edge spot welding connection, simultaneously by pull rod pull tie stress and bottom support rod support, so that the arc steel beam piece of lower side forms stressed whole to install upper support rod support in the arc steel beam piece on top, after the arc steel beam piece on top is welded and fixed with steel structure building body by welding layer, the arc steel beam piece of lower side can be welded with steel structure building body immediately, solve the problem that after the arc steel beam piece on top is supported by erecting scaffold from ground and construction, it needs to be disassembled to install and construct the arc steel beam piece of lower side, improve construction efficiency.

The application relates to a design and construction method of an assembled concrete pipe gallery. The construction method comprises the following steps: S1, prefabricating a concrete column and a concrete beam, the end of the concrete beam is reserved with exposed beam end steel bars, and the connecting side surface of the concrete column is embedded with protruding column side steel bars; S2, hoisting the concrete column, anchoring the lower end of the concrete column in the bearing platform foundation, and adjusting and fixing the verticality and elevation; S3, installing an independent temporary support structure between two adjacent installed concrete columns; S4, hoisting the concrete beam, erecting the two ends of the concrete beam on the temporary support structure, and cross-over arranging the beam end steel bars and the column side steel bars to form a steel bar connecting joint; the application greatly reduces high-altitude operation and the use of a scaffold, the main operation is completed on the ground or at low altitude, the safety risk is reduced, prefabrication and installation can be carried out in a flow, and the construction period is significantly shortened.

This invention provides a prefabricated building construction platform and its construction method, belonging to the field of building construction sorting technology. The prefabricated building construction platform and its construction method include a support assembly and guide rails. Multiple guide rails are spaced apart front to back and are fixedly installed on embedded parts in the wall, extending vertically. The support assembly is fixedly connected to the embedded parts on the wall. A support plate is provided at the top of the support assembly, extending horizontally. Mounting frames are provided at both ends of the support plate, and an operating platform is fixedly connected between two mounting frames. A vertically connected passage is provided on the operating platform. The support assembly supports the support plate, mounting frames, and operating platform. A hydraulic mechanism enables the support plate, mounting frames, and operating platform to be raised and lowered. This eliminates the need for extensive scaffolding to support the operating platform, reducing material waste and improving work efficiency.

The utility model provides an engineering building scaffold convenient to feed, which belongs to the technical field of scaffolds and comprises a scaffold body, a mounting plate arranged on one side of the top of the scaffold body, a triangular fixing frame arranged on one side of the mounting plate, supporting frames arranged on two sides of the bottom of the triangular fixing frame, and guide rails arranged on two sides of the supporting frames. A moving block is slidably connected into the guide rail, a moving pulley is rotatably connected to the inner side of the moving block, an article placing frame is arranged at the bottom of the moving block, an upper traction wheel is rotatably connected to the top of the supporting frame, a synchronous motor is embedded in one side of the supporting frame, a winding shaft is fixedly connected to the output end of the synchronous motor, and a traction cable is arranged among the winding shaft, the moving pulley and the upper traction wheel. According to the engineering building scaffold convenient to feed, the traction force of the output end of the synchronous motor is reduced through the movable pulley of the movable pulley structure, the load of the output end is reduced, and therefore heavier objects can be pulled through smaller power.

The invention relates to the technical field of constructional engineering, and discloses a foldable cantilever scaffold device. Through the collaborative design of the folding assembly (the supporting piece and the adjusting rod) hinged to the I-shaped steel and the sliding assembly, the traditional upward pulling type and downward supporting type functions are integrated, and double-mode dynamic switching is achieved; the angle rotation of the supporting piece enables the device to be flexibly switched between a cantilever downward supporting mode and a cable-stayed anchoring mode; a U-shaped sliding block of the sliding assembly slides along a flange of the I-shaped steel, the position of a limiting rod is adjusted in real time along with the length of the cantilever through an adjusting bolt, and it is ensured that supporting force accurately acts on the optimal force bearing point; the equidistant holes of the adjusting rod are matched with the bolts of the limiting rod to provide multi-gear height adjustment to adapt to different floor heights and loads. The supporting piece and the adjusting rod are hinged, so that the anti-overturning force of an upward-pulling mode and the stability of a downward-supporting mode are enhanced respectively. The device can be folded and stored in I-shaped steel flange plates, the storage and transportation space occupancy rate is remarkably reduced, and standardized components support repeated use. The problems that a traditional scaffold is single in function and rigid in adjustment are solved through a modular pin joint, sliding locking and dual-mode bearing system, and a standardized high-adaptability supporting scheme is provided for high-rise and special-shaped structures.

The application discloses a kind of anti-falling climbing hanging ladders, comprising: ladder frame, a set of symmetrically arranged hook above the ladder frame;Setting on one side of the ladder frame, the anti-falling mechanism includes fixedly installed one side of the ladder frame, the anti-falling device of the application, by setting hook on ladder frame, can make ladder frame hang in the steel frame of building construction scaffold, when construction personnel are located below ladder frame, can be via external mobile phone terminal through motor wireless receiving module control traction motor access power and start, its start winding traction rope, by setting anti-falling device on the lateral side of ladder frame, safety rope on anti-falling device is fixed with safety ring, and then construction personnel climb on ladder frame and work, if appear to step empty or lose balance, instantaneous tension will trigger anti-falling device, and then through anti-falling device control construction personnel slowly fall, to reduce risk, improve construction safety.

This application discloses a reverse construction process for cast-in-place overpass pile and column integrated casting, belonging to the technical field of overpass construction. It includes the following steps: S1, road maintenance; S2, integrated pile and column casting; S3, abutment and cap beam construction; S4, box girder casting using the ground formwork method; S5, ancillary structure construction; S6, earthwork excavation and pier finishing; S7, tie beam construction. This application, by adopting a reverse construction process of "maintaining road access first, then constructing the structure, and finally excavating," overturns the traditional forward construction logic, ensuring uninterrupted access to existing roads and eliminating the need for detours during construction, significantly reducing social conflicts. Integrated pile and column casting creates a seamless, integral structure between the pile foundation and pier, improving structural integrity and load-bearing capacity. The ground formwork method for casting box girders eliminates the need for full-span scaffolding, avoiding the safety risks of high-scaffolding construction. Simultaneous layered earthwork excavation and pier finishing avoids high-altitude scaffolding work, significantly reducing construction safety risks.

This utility model discloses a cableway suspended platform installation structure, relating to the field of building construction technology. It includes a suspended platform guide mechanism and a suspended platform suspension mechanism installed on the top of a building. The guide mechanism comprises a guide mechanism frame and a guide wire rope. The upper end of the guide wire rope is connected to the guide mechanism frame, and the lower end is connected to the bottom of the building. The guide wire rope is inclined relative to the ground. A suspended platform is installed on the guide wire rope, and a pulley mechanism is installed on the suspended platform. The guide wire rope is connected to the pulley mechanism. The suspended platform suspension mechanism comprises a suspension mechanism frame and a suspension wire rope. The upper end of the suspension wire rope is connected to the suspension mechanism frame, and the lower end is connected to the suspended platform. The suspension wire rope is also connected to the movable end of a hoist. This cableway suspended platform installation structure can be installed on inclined facades and can be used for curtain wall construction, etc. It is convenient to install and dismantle, safe to operate, and saves time, solving a series of problems such as difficult scaffolding erection, high costs of scaffolding measures, and impact on construction schedules.

The utility model provides a tunnel inverted arch waterproof plate laying supporting structure which comprises a platform frame located on the top, a platform top plate is laid on the top of the platform frame, a plurality of horizontal wheel sets are installed on the inner side edge of the platform frame, and the horizontal wheel sets are in sliding fit with an upper sliding way laid on the inner side wall of a tunnel. A triangular supporting frame structure is fixed to the bottom of the platform frame, a plurality of vertical wheel sets which are vertically arranged are fixed to the bottom end of the triangular supporting frame structure, and the vertical wheel sets are in sliding fit with a lower sliding way laid on a tunnel bottom plate. The supporting structure is of an integral structure, can well adapt to tunnel secondary lining waterproof laying construction, replaces a traditional scaffold supporting mode, can be conveniently and integrally moved after being formed at a time and then is reused, construction efficiency is effectively improved, construction difficulty is reduced, and safety of the operation process is guaranteed.

The utility model discloses a construction platform for a building machine horizontal structure lag construction elevator shaft, and relates to the technical field of building machines. The elevator shaft construction platform comprises four lower hanging vertical rods, X-direction platform beams and Y-direction platform beams, wherein the lower hanging vertical rods are fixedly connected with steel wire ropes; the X-direction platform beams and the Y-direction platform beams are fixedly arranged around the peripheral sides of the lower hanging vertical rods at intervals; the lower hanging vertical rods, the X-direction platform beams and the Y-direction platform beams form a shaft body structure; a construction platform steel gangplank is horizontally installed in the well body structure, a people passing opening is formed in the surface of the construction platform steel gangplank, and a crawling ladder is installed at the bottom of the people passing opening. A bottom inclined construction platform steel gangplank is installed below the well body structure, a bottom supporting plate is obliquely arranged below the inclined construction platform steel gangplank, and one side of the bottom supporting plate abuts against the vertical structure wall. The device is simple in structure, low in manufacturing and using cost and convenient to mount and dismount; compared with a huge scaffold structure in the prior art, building and using are more convenient and efficient.

The utility model relates to the technical field of beam body cutting, in particular to a partitioning type cutting system for cutting an existing beam body, which comprises a rope saw cutting machine and a steel pipe fastener type scaffold arranged on one side or two sides of an existing bent cap. The rope saw cutting machine is arranged on the steel pipe fastener type scaffold, a rope saw chain of the rope saw cutting machine penetrates through a drill hole formed in the existing track beam, and the rope saw cutting machine conducts sleeve cutting on the existing track beam. The utility model has the advantages that the cutting operation time of the existing beam body is shortened, and the construction efficiency is improved; the construction structure is simple, reasonable, convenient to construct and suitable for popularization.

This invention belongs to the field of building construction technology, and particularly relates to a method for enclosing a pre-reserved material hoisting opening in ultra-high clearance structures without the need for formwork. The method includes the following steps: Step A, material preparation before construction, specifically including: Step A1, selecting H-beams conforming to national standards as the main beam; Step A2, prioritizing the use of scaffolding steel pipes as connecting supports; Step A3, preparing tie rods for connection and fixation; Step B, pre-construction preparation, using H400×400×15×20 H-beams, corresponding specifications of steel pipes, and 14mm diameter tie rods for construction, and setting up a small opening of appropriate size. After reinforcement, the material hoisting opening exhibited good stability during subsequent construction. During the bottom formwork removal stage, the small opening facilitated the removal work, meeting project schedule and quality requirements, and shortening the construction period by 50%. After construction, the material hoisting opening was well-sealed, no safety accidents occurred during construction, and construction costs and time were effectively controlled.

The invention discloses a construction method for an aluminum formwork supporting system of a hollow ribbed floor ribbed beam, and relates to the technical field of building engineering construction. The method comprises the steps that the size of a core mold is determined by combining the floor span, the design load and the concrete strength grade, rib beams are positioned through a two-way coordinate marking method with the axis of a frame column as the benchmark, a core mold arrangement diagram is generated by integrating a structure drawing and a water and electricity installation drawing, and aluminum mold matching and node bulk sample design are conducted based on the core mold arrangement diagram. The distance between vertical rods and force transmission path parameters are set, and it is ensured that the supporting system is matched with the stress of the ribbed beams; accurate alignment of the support and the ribbed beam is achieved according to the process of aluminum mold installation, ribbed beam paying-off, beam and bottom rib installation, ribbed rib installation, embedded pipeline laying, core mold installation, anti-floating fixing, plate surface rib binding, concrete pouring and aluminum mold removal. The problems of support deviation, low wood mold process precision and poor aluminum mold adaptability caused by modulus limitation of a traditional scaffold are solved.

The invention discloses a secondary grouting construction device and method for a top truss column foot of a reverse building method supporting column, and belongs to the technical field of building construction. The construction device comprises a steel plate hoop assembly and a grouting funnel, the steel plate hoop assembly is formed by assembling two L-shaped steel plates with bolt connection lug buckles and mounting bolts, the steel plate hoop assembly is detachably fixed to the top of a steel column through the mounting bolts, and the grouting funnel is matched with a truss column bottom plate grouting hole. The construction method comprises the steps that the L-shaped steel plates are assembled and fixed to form the grouting baffle, grouting materials are poured into the gap between the steel column and the truss column bottom plate through the funnel, and after the grouting materials reach the design strength, the assembly is disassembled and cleaned for recycling. Scaffolds do not need to be erected, assemblies are convenient to disassemble and assemble and can be repeatedly used, the construction efficiency is greatly improved compared with a traditional wood pattern mode, the comprehensive cost is reduced, the grouting quality is stable, universality is high, the requirement for green construction is met, and the method is suitable for secondary grouting construction of the roof truss through the reverse building method.

The application discloses a kind of complex terrain cast-in-place box girder construction methods, belong to building construction field, comprising: with the through core rod that penetrates pier column as support, main cross beam is set on the through core rod, and bailey beam is set on cross beam, and scaffold is set on bailey beam and constructs support system, finally builds formwork and completes the pouring of box girder;The through core rod is provided with two upper and lower rods, and a support limiting device is arranged between the upper and lower through core rods for limiting support, and the support limiting device and the through core rod are fixed in a non-welding manner, and are fixed with the main cross beam in a welding manner.The method of the application uses the through core rod+bailey piece+disc type scaffold as the support system to replace the conventional full-frame support and steel pipe column scheme, without setting up full-frame support and steel pipe column support, saving time, speeding up construction progress, reducing the risk of support installation and removal, reducing material and personnel investment, and having strong practicality for cast-in-place box girder construction with a span of not more than 25m, especially in mountainous areas, with obvious cost reduction and efficiency improvement.

The utility model provides a profile steel support structure for high-altitude cantilever structure construction, and belongs to the technical field of building construction. According to the technical scheme, the device comprises a triangular steel platform operation frame, a triangular steel platform and an overhanging supporting frame; the triangular steel platform operation frame comprises a jacking rod, a connecting rod is arranged on the jacking rod, and an inclined supporting rod is arranged on the connecting rod; the triangular steel platform comprises a plurality of horizontal section steel, diagonal bracing section steel is arranged at the outer side ends of the horizontal section steel, the free ends of the horizontal section steel and the diagonal bracing section steel are arranged on the wall through connecting pieces, and a plurality of formwork supporting cross beams are arranged on the horizontal section steel. The overhanging supporting frame comprises a supporting frame vertical rod, a longitudinal horizontal rod and a transverse horizontal rod, the inner side end of the transverse horizontal rod is connected with the full framing in the building, and the supporting frame vertical rod is fixed to the formwork supporting frame cross beam. The overhanging scaffold has the advantages that through structural optimization, the problems that a traditional overhanging scaffold is long in construction period, high in leakage risk, waste in materials and the like are systematically solved, and comprehensive benefits are remarkable.

The invention discloses a maintenance platform and method for tunnel maintenance. The problem that in the prior art, a scaffold is inconvenient to move after being built is solved. The device comprises a moving trolley capable of moving on a track, a plurality of lap joint frames detachably arranged on the moving trolley, a connecting mechanism arranged between every two adjacent lap joint frames, an extension mechanism detachably arranged between a fixing mechanism and the connecting mechanism, and an anti-slip mechanism arranged on the moving trolley and used for fixing the moving trolley. Through cooperation of the lap joint frames and the connecting mechanisms, the two adjacent lap joint frames can be conveniently assembled and disassembled, meanwhile, the extension mechanisms can be conveniently installed so that the use space of the lap joint frames can be increased, and in addition, the movable trolley can further drive the lap joint frames to move so that the positions of the lap joint frames can be adjusted.

The invention belongs to the field of laminated slab construction, and particularly relates to a laminated slab construction joint slurry leakage prevention formwork structure and a construction method.The formwork structure comprises a formwork arranged on the lower side of a laminated slab cast-in-place belt, a sealing strip is arranged on the surface of the included angle between the side face of the formwork and a laminated slab, and a main keel is arranged on the outer side of the sealing strip; the main keels on the two sides of the formwork are fixed to the formwork through clamps. Secondary keels are arranged on the lower side of the main keel at equal intervals, telescopic supporting rods are arranged on the lower sides of the secondary keels, and the lower ends of the telescopic supporting rods are fixed to a scaffold supporting system; the construction method comprises the steps that the formwork is arranged on the lower side of the laminated slab cast-in-place belt; a long-strip-shaped sealing strip is laid at the included angle position of the formwork and the laminated slab in the length direction of the cast-in-place belt; the main keels are pressed on the surfaces of the sealing strips, then the main keels on the two sides of the formwork are clamped through a clamp, and the sealing strips are tightly attached to the side faces of the formwork; secondary keels are uniformly arranged on the lower side of the main keel, and telescopic supporting rods are arranged on the lower sides of the secondary keels, so that the sealing strip is tightly attached to the bottom surface of the laminated slab.

The utility model relates to a floating bridge type water temporary safety channel. The floating bridge type overwater temporary safety channel comprises a channel unit, the channel unit comprises single-side supporting frames, buoys, building wood formworks, battens and longitudinal rods, the two single-side supporting frames are connected through the longitudinal rods, and the buoys are arranged between the left sides of the lower portions of the two single-side supporting frames and between the right sides of the lower portions of the two single-side supporting frames. Battens are uniformly arranged between the middle parts of the two single-side support frames, are arranged along the axial direction of the longitudinal rod, and are provided with a building wood template. The cross rods, the cross fasteners, the short vertical rods, the inclined supporting rods, the long vertical rods, the rotary fasteners, the direct fasteners and the longitudinal rods are all connected through the fasteners to form the framework, the batten, the building wood formwork and the dense safety net are installed in the framework, and the overwater safety channel for temporary wading operation can be used as the overwater safety channel for temporary wading operation. The materials such as the buoys, the scaffold steel pipes, the fasteners and the battens are low in purchase cost and can be reused, and the whole body is more stable after bearing.

The invention relates to the technical field of building construction, and discloses a batten mounting device which comprises a frame, the frame is formed by connecting a plurality of rod bodies, each rod body comprises vertical rods, the number of the vertical rods is at least four in the gravity direction, each rod body further comprises transverse rods, the transverse rods are arranged in the horizontal direction, and the transverse rods are connected with the vertical rods, so that the frame forms a three-dimensional structure. And through the three-dimensional frame formed by the at least four vertical rods and the horizontal cross rods, the overall stability and the bearing capacity of the device are improved. The vertical rods are arranged in the gravity direction so that the vertical load of the battens can be effectively dispersed, and the grid structure formed by the horizontal transverse rods can resist lateral force and prevent the frame from deforming. Meanwhile, transportation and on-site assembly are facilitated, and the device is particularly suitable for aerial work scenes. The three-dimensional structure of the frame provides a reliable installation foundation for a subsequent driving assembly, and meanwhile the size is allowed to be flexibly adjusted according to construction requirements. And compared with a single-side scaffold, the structural stability is higher, and the battens can be transported without depending on a wall body.

The invention discloses a trestle maintenance construction method and system, and relates to the field of constructional engineering installation, and the method comprises the following steps: laying double rails in a trestle, and installing an anti-back-sliding device; a winch is fixed to a high platform of the trestle to serve as traction power; a steel wire rope connected with the winch is connected with a transport vehicle running on the double rails; a plurality of suspenders are welded at the bottom of the trestle; a closed hanging scaffold is set up on the hanging rod step by step in a segmented mode, a winch is used for dragging a transport vehicle, and maintenance materials are transported to a construction point along the double rails; and constructors carry out welding and reinforcing operation on the closed hanging scaffold.

The invention discloses a closed protective portal frame system for dynamically isolating a rail-mounted area from a station construction area, which is erected above a bottom plate of an underground excavation station and stretches across the rail-mounted area, and comprises a plurality of modular portal frame units arranged in parallel and a protective net covering the outer sides of the modular portal frame units, each modular portal frame unit is of a portal structure formed by stand columns, cross beams and corner supports, the bottoms of the stand columns are fixed to a station bottom plate through detachable bottom plate connecting pieces, the stand columns and the cross beams are detachably connected, the stand columns serve as formwork supporting frames for non-standard section negative second layer side wall concrete operation, and the upper surfaces of the cross beams bear station structure construction scaffolds. The adjacent portal frame units are connected through the longitudinal connecting rods to form an integral protection corridor. The rail-mounted area full-closed hard isolation and integrated protection and construction supporting functions are achieved, modular design is achieved, assembly and disassembly are rapid, dynamic construction is adapted, the safety and efficiency of cross operation are improved, the construction period is shortened, and the cost is reduced.

The invention discloses a steel structure cantilever platform system for rotational flow pool open caisson construction, and relates to the technical field of cantilever platform systems. Comprising a plurality of overhanging main beams annularly embedded along the well wall of the open caisson, a secondary beam network installed at the tops of the main beams and arranged in the radial direction, an annular ring beam connected with the inner side ends of all secondary beams to form a closed frame, a platform bed board laid on a framework, a diagonal bracing system connected with the bottoms of the main beams and the well wall, and a safety protection system on the edge of a platform. According to the core of the method, through the design of high-position pre-burying and synchronous sinking, a platform main structure is pre-installed at the elevation higher than the underground water level when the second section of the open caisson is manufactured, and therefore a dry and stable high-altitude operation face is provided all the time in the subsequent sinking and construction process. The system fundamentally avoids the problem that a scaffold is erected in accumulated water and sludge at the bottom of a well in a traditional process, parallel working procedures are achieved, construction safety, efficiency and economical efficiency are remarkably improved, and the system is particularly suitable for deep well engineering with the high underground water level.

The present application relates to the technical field of building construction, and discloses an elevator shaft operation platform, which comprises: wall-attached devices, multiple wall-attached devices are arranged at intervals between the shaft walls of an elevator shaft, the top of each wall-attached device is provided with a support groove; a support frame is arranged on the wall-attached device, the support frame is clamped on the support groove, the wall-attached device further comprises a limiting piece, the limiting piece is detachably assembled in the groove of the support groove to press-fit the support frame in the support groove; a support plate is laid on the support frame, and the support plate is used for supporting construction personnel. The multiple wall-attached devices can be fixedly assembled with the shaft walls of the elevator shaft through expansion bolts to form the assembly basis of the support frame, the support frame is positioned by the support groove and the limiting piece, the support frame is prevented from shaking, and the stability of the operation platform is improved; the wall-attached devices of the operation platform are directly fixed with the shaft walls of the elevator shaft, and structures such as high scaffolds are not needed, thereby saving construction time, being convenient to disassemble and assemble, and saving construction cost.

The invention provides a two-structure wall masonry device and a construction method, and belongs to the technical field of wall masonry devices. The two-structure wall masonry device comprises a rail assembly, a masonry bottom plate and a masonry formwork and can further comprise a plurality of cushion blocks. The wall construction method comprises the steps that S1, a wall is built, tie bars are pre-buried, and welding holes are formed; s2, wall body treatment; s3, the prefabricated wall body is moved to the wall body design position; s4, lowering the wall body, and welding tie bars; and S5, the welding holes are grouted and sealed, and the bottom of the wall is grouted and fixed. The wall building device is used for prefabricating the wall indoors, a large number of scaffolds do not need to be built, input of materials and construction cost is reduced, high-altitude operation is not needed, and potential safety hazards are reduced. The positions of the tie bars do not need to be adjusted in the later period, and the tie strength of the tie bars can be reserved to the maximum extent; and the perpendicularity and the flatness of the prefabricated wall body are adjusted before the prefabricated wall body is fixed, so that the construction quality can be improved.