38results about How to "Guaranteed section size" patented technology

The invention relates to a structure and a construction method of a cast-in-style welded steel frame composite concrete shear wall. The structure comprises an indoor concrete layer, an outdoor concrete layer and a wire frame insulation sandwich board. The wire frane insulation sandwich board is coated between the indoor concrete layer and the outdoor concrete layer. At least two rectangular and groove-typed cantilever holes are arranged at the top of the sandwich board, and each cantilever hole is provided with a U-shaped cantilever anchor bar which penetrates through the sandwich board and a floor slab to be fixedly connected with the floor slab. The construction method includes site preparation work, binding of load-bearing steel bars of a wall body and edge member steel bars, custom processing of the sandwich boards, installation of the sandwich boards, pavement of template positioning pieces and wall bushings, fixation of water and electric pipes inside the wall body, binding of ordinary blocks on both sides of the wall body steel bars, erecting of the templates, pouring of the concrete, removing of the templates and concrete curing. Since a series of composite wall construction methods are adopted, problems existing in the prior art are solved, and a composite heat preservation technology is improved.

A construction technology of a wall body is characterized in that a concrete hollow supporting body is arranged between position-limiting templates which are arranged on two sides for limiting the thickness of the wall body for ensuring the thickness of a protective layer of the concrete of a shear wall, controlling the width of the cross section of the wall body and being used as a sleeve of a tying bolt, the hollow supporting body comprises steel wires or small short steel bars which are shaped like hollow rods; supporting surfaces for supporting the templates are arranged on two ends of the hollow supporting body, a through hole for being penetrated by the tying bolt is arranged at the center along the longitudinal direction; the length of the hollow supporting body is less than the thickness of the wall body to be constructed by 1.5-2.5mm, the width and the height of the end surfaces are 45-85mm, and the diameter of the through hole is greater than the diameter of the tying bolt by 3-7mm. The hollow supporting body integrates a pad of the protective layer of the concrete of the shear wall, a jack for controlling the cross section of the wall body and the sleeve of the tying bolt into a whole body, thereby not only saving a great number of steel bars or PVC sleeves, but also reducing the construction cost and improving the construction efficiency.

The invention discloses a temporary positioning device for a steel bar framework. The temporary positioning device for the steel bar framework comprises fixed buckles and a supporting frame, wherein the shape of the supporting frame is matched with the cross-sectional shape of the steel bar framework. The fixed buckles are installed on the supporting frame and the number of the fixed buckles is matched with the number of longitudinal steel bars of the steel bar framework. The fix buckles comprise upper rings and lower rings, one ends of the upper rings and one ends of the low rings are connected in a hinged mode through pin shafts, and the other ends of the upper rings and the other ends of the low rings are detachably connected through locking devices, so that the upper rings and the lower rings are combined into a circular fixing ring for temporarily fixing steel bars, anti-skid rubber pads are arranged on the inner walls of the upper rings and the inner walls of the lower rings, andthe lower rings are mounted on the supporting frame through connecting pieces. The fixed buckles are mounted on four side rods of a rectangular frame through sliding bases, and a sliding device comprises the sliding bases, wherein sliding holes formed in the four side rods of the rectangular frame in a sleeving mode are formed in the sliding bases. The temporary positioning device for the steel bar framework is simple, efficient and high-practical and in a rectangular or strip shape, has the functions of fixing the spacing and position of the steel bars in a steel bar cage and preventing thesteel bars from shifting.

The invention discloses a construction method of a special structural layer for tapered bottom wheat steeping, comprising the following steps of: erecting a bracket according to the sequence of a special-shaped beam, a cross-shaped beam, a circular beam and a round hole; laying a special-shaped beam bottom form and a cross-shaped beam bottom form on the beam bottom bracket; banding a beam reinforcement cage above the special-shaped beam bottom form; placing the banded beam reinforcement cage on the special-shaped beam bottom form; banding a beam reinforcement cage above the cross-shaped beam bottom form; banding cantilever bracket tendons on the special-shaped beam and the cross-shaped beam, and passing reinforcing steel bars through the circular beam; preparing a triangular hollow cabinet from battens and bamboo veneers and fixing on the beam bottom protruding from the circular beam; laying a planking bottom form on the side from of each beam, and reserving post-casting zones at the corresponding position of the beam affecting on the stretching of the bonded prestressed tendons; pouring concrete; and stretching the special-shaped beam prestressed tendons in this layer. The inventive method has the advantages of no need of rework, convenient scaffold erection, accurate template erection positions, and safe structure.

The invention discloses a surface layer template connecting structure of a cast-in-place concrete sloping roof, which a compact sloping roof structure suitable for building a slope between 30 degrees and 60 degrees. The surface layer template connecting structure of the cast-in-place concrete sloping roof comprises a bottom layer template, a surface layer template, a water stopping bolt, a plurality of vertical keels and a plurality of side keels, wherein the bottom layer template is positioned on a bottom surface; the vertical keels are distributed in parallel above the bottom layer template; length directions of the vertical keels are consistent with the direction from a slope bottom to a slope top; one end of the water stopping bolt is connected with the bottom layer template while the other end of the water stopping bolt is connected with the vertical keels; side surfaces of the side keels are connected with side surfaces of the vertical keels; the surface layer template is a stripped wood plate with length adaptive to a distance between the adjacent vertical keels; and two ends of the surface layer template are connected with the side keels. In the invention, because the surface layer template connecting structure located by the vertical keels and limited by the water stopping bolt is adopted, the thickness of the sloping roof structure is controlled, the foundation is laid for mounting the surface layer template, a compactness requirement on the concrete structure is assured, and the construction difficulty of the structure leakage is fundamentally solved.

The invention provides a pentagonal arm frame, a wet spraying machine, and a manufacturing method of a polygonal arm frame, and relates to the technical field of engineering machines. The pentagonal arm frame comprises an arm frame body which is formed by bending of a plate, the two ends of the bent plate are connected in a welded mode, and a welded joint formed by welding is located on a top plate of the arm frame body. According to the pentagonal arm frame, the technical problems that in the prior art, the section size of the pentagonal arm frame is difficult to ensure due to the fact that welding heat input is large, and consequently, the two side faces are prone to shrinkage deformation are relieved.

The invention provides a horizontal pneumatic pressing machine and a press-fit method for a cable assembly. The pressing machine adopts the structure that an electromagnetic valve is mounted below a table board; a pressure mechanism, a positioning mechanism, a PLC (Programmable Logic Controller) electrical control mechanism and two start switches are mounted on the table board; a sensing mechanism is mounted on the side of the positioning mechanism; a power supply is connected when the sensing mechanism induces a signal that a wrench is pulled downwards to a 90-degree position; and two start switches are pressed by two hands at the same time so as to automatically control the action of the pressure mechanism to carry out press-fit. According to the invention, a mechanical and sensing combined positioning way, a manual pre-positioning and self-control press-in combined mode, and modularized mechanism design are adopted, and the PLC electrical control mechanism is utilized to directly input pre-arranged parameters so as to realize the horizontal press-fit of the cable assembly. During the press-fit period, manual support is not required, working burden is reduced, and the safety is ensured. According to the invention, the automatic press-fit problem of the larger-diameter semi-flexible rigid cable assembly is solved, and both the press-fit efficiency and the press-fit quality are greatly improved.

The invention provides a solid rock foundation positioning and blasting and hydraulic spalling combined excavation construction method which comprises the following steps of A construction preparation; B, drawing deepening based on a BIM technology; C, foundation position lofting; D, explosive mounting hole lofting; E, explosive mounting hole drilling; F, foundation middle position blasting; G, blasted gravel cleaning; H, spalling hole position lofting and spalling hole drilling; I, hydraulic spalling; J, crushing and cleaning of rocks in a foundation; and K, qualified foundation subsoil inspecting to complete excavation construction of the foundation. The invention provides the solid rock foundation positioning and blasting and hydraulic spalling combined excavation construction method which is a novel construction method, not only can improve the excavation speed of the solid rock foundation but also can ensure the excavation size of the solid rock foundation well, and is efficient,environmentally-friendly and energy-saving in the construction process.

The invention relates to an ultra-high performance concrete and common concrete combined pile and a construction method thereof. The combined pile comprises an ultra-high performance concrete prefabricated barrel, a plurality of holes are formed in the side wall of the ultra-high performance concrete prefabricated barrel, the ultra-high performance concrete prefabricated barrel is placed in a pile hole, the center line of the ultra-high performance concrete prefabricated barrel coincides with that of the pile hole, common concrete is poured in the ultra-high performance concrete prefabricated barrel to form a common concrete inner core, the common concrete flows out of the holes in the outer wall of the ultra-high performance concrete prefabricated barrel from inside to outside to form a common concrete bonding outer layer, and the common concrete bonding outer layer is located between the outer wall of the ultra-high performance concrete prefabricated barrel and the inner wall of the pile hole. The ultra-high performance concrete and common concrete combined pile is simple in structure construction, novel in material and good in mechanical property, the pile diameter can be reduced, manufacturing cost can be saved, the problems happening to pile foundation construction are effectively solved, the quality and durability of the pile are improved, the good mechanical property and economic benefits are achieved, and the quite wide application prospect is achieved.

The invention discloses a concrete small-cross section special-shaped column mould box method construction method. The concrete small-cross section special-shaped column mould box method constructionmethod comprises the following steps: S1, performing deepening design, and determining the types, the numbers and the cross sections of the mould boxes required to be added for changing a special-shaped column into a rectangular column; S2, manufacturing the mould boxes; S3, performing lofting on side lines of a small-cross section concrete special-shaped column and a rectangular contour line; S4,mounting reinforcing steel bars of the small-cross section concrete special-shaped column; S5, mounting mould plates of the small-cross section concrete special-shaped column; and S6, pouring, vibrating, curing, checking and accepting concrete of the small-cross section concrete special-shaped column. According to the construction method, the special-shaped column is changed into the rectangularcolumn through rectangular mould plate boxes, so that the mould supporting reinforcing construction process is simplified; the construction speed is high; the efficiency is high; the safety of a reinforcing system is ensured; the waste caused by cutting a large mould plate into small mould plates and cutting a steel pipe can be avoided; standardized and sized rectangular template boxes can be prefabricated in a factory directly and spliced on site; and the mould plate boxes, and the mould supporting and reinforcing materials can be used repeatedly, so that the construction energy consumption is reduced, and the construction cost is reduced.

The invention discloses an independent foundation closed type formwork structure and process. The independent foundation closed type formwork structure comprises templates, square timber, steel pipes,rebars and split bolts. Inclined binding bars are pre-embedded in a concrete cushion. The upper sides of the left and right side face templates are each connected with one side face template throughseal butt joint structures. Meanwhile the diagonal split bolts are perpendicularly installed on all the slope templates. All the diagonal split bolts and the corresponding pre-embedded binding bars are fixed together. The independent concrete cushion serves as the foundation, the area formed by all the side face templates and the slope templates in a surrounded mode serves as a closed pouring area, and thus a closed type formwork supporting purpose can be achieved. The overall performance of an independent foundation template system is improved, the binding bars are pre-embedded in the independent foundation cushion and are welded to split wires, the split wires are connected with the slope templates to resist buoyancy of concrete to the slope templates, and thus the independent foundationtemplate system is firm and stable.

The invention discloses a stair inclined plate type stadium stand template reinforcement system and a construction method thereof. The stair inclined plate type stadium stand template reinforcement system includes horse stool reinforcement (1), positioning reinforcement (2), square wood (3), double steel tubes (4), water stopping screw rods (5) and a short steel tube (6), two short supporting legs at the bottom of the horse stool reinforcement (1) and main reinforcement of a rebar mesh piece (8) are welded to form a triangular bracket structure, the positioning reinforcement and the horse stool reinforcement are welded and fixed, side dies (7) are bound to the positioning reinforcement, the transversely spliced side dies are overlapped through the square wood, the double steel tubes are arranged above the side dies and tied with the water stopping screw rods, the water stopping screw rods are welded to the rebar mesh piece, and the short steel tube is welded to the double steel tubes and supports the square wood located at the lower end of the upper step side die. According to the stair inclined plate type stadium stand template reinforcement system and the construction method thereof, a rebar mesh of an inclined plate of a stand is fixed by pulling the upper part and supporting the lower part, it is ensured that the rebar mesh piece does not slide downward, the positioning reinforcement at a step template lower opening is fixed, the upper opening transverse double steel tubes and the short steel tube form a firm triangular system with the side dies, and stability of the template system is guaranteed.

The invention relates to a double-faced superposed beam and a construction method thereof. At the present stage, the state energetically develops housing industrialization, but in an existing prefabricated building mode, a prefabricated beam is limited by the beam length, a production environment, transportation and installation conditions and the like. The double-faced superposed beam comprises a steel bar framework (6) and prefabricated concrete slabs (1), the prefabricated concrete slabs are poured on the two vertical sides of the steel bar framework, the steel bar framework comprises truss bars (4), a set of beam stirrups (2) are installed in the truss bars, the two vertical sides of the one set of beam stirrups are fixed with the truss bars, the two vertical sides of the one set of beam stirrups are fixed with a set of constructional steel bars (3), beam main bars (5) are arranged at the circular arc positions of four corners of the one set of beam stirrups in a penetrating mode respectively, and the inner sides of the prefabricated concrete slabs are provided with smoothly-reduced cross sections.

The invention discloses a structural steel two-stage heating hardening and tempering process method. The structural steel two-stage heating hardening and tempering process method comprises the following steps that S1, one-stage heating is carried out, specifically, a structural steel workpiece is overall heated, and the first-stage heating temperature is controlled to be the lower limit of the normal quenching temperature of the structural steel workpiece. The structural steel two-stage heating hardening and tempering process method is suitable for the workpiece with the diameter or thicknesslarger than the material hardenability critical diameter or with the large section size change, the first-stage heating temperature selects the lower limit of the normal quenching temperature of steel, grains can be refined, the internal stress is reduced, the probability of cracks is greatly reduced, and deformation and decarburization are reduced; the second-stage heating temperature selects theupper limit of the quenching temperature, the hardenability effect of the large part of the section size of the workpiece is guaranteed, and the situation that the temperature of the small part of the section size is reduced too low in the process of transferring from a heating chamber to a cooling chamber is prevented; the first-stage long-time heating is carried out, and the overall structure transformation of the workpiece is guaranteed; and the second-stage short-time heating is carried out, and the situation that the section size of the workpiece is small or the temperature of the changing part is too high, and consequently defects are generated is prevented.