The invention discloses a special steel formwork for a combined stairway of a high-rise building and an assembly method of the special steel formwork. The special steel formwork comprises two mutually parallel stairway beams, horizontal poles are arranged between the stairway beams, two ends of each horizontal pole are perpendicularly connected with the stairway beams respectively, a stepping vertical pole is perpendicularly arranged on the side wall of each stairway beam and fixed to the stairway beam, horizontal poles are placed at two ends and the center of each stairway beam respectively, angle steel switchover pieces are attached to the side walls and the bottoms of the horizontal poles and cling to the stairway beams, U-shaped fasteners penetrate the angle steel switchover pieces and the stairway beams to serve as fixing parts, the stepping vertical poles are perpendicularly fixed outside the stairway beams, a horizontal positioning mechanism is arranged between each stepping vertical pole and the corresponding stairway beam, the bottom of each stepping vertical pole is connected with a baffle, angle steel switchover pieces are arranged on the baffles, and rib plates and fixing pipes are welded on the baffles and used for enhancing the strength of the baffles and fixing lateral timber formworks. By the aid of an assembly structure, deformation of concrete can be avoided after forming, and the quality of the stairway is ensured.

Special steel formwork for combined stairway of high-rise building and assembly method of special steel formwork

The invention provides an integral type stair mold and a construction method of the integral type stair mold. The mold comprises step type face plates, strip-shaped side plates, box iron connecting strips, a box iron keel frame, hoisting rings, anchor straps, exhaust holes, vibration holes and a pouring opening. The construction method includes the following steps of firstly, manufacturing the integral type stair mold according to the design size of stair treads; secondly, hoisting the integral type stair mold to a stair bottom formwork; thirdly, unceasingly pouring concrete into the pouring opening, and conducting vibration while conducting pouring till the integral type stair mold is filled with the concrete; fourthly, unfastening fastening disc strips of the four anchor straps and hoisting away the integral type stair mold when the concrete has the prescribed strength. By means of the integral type stair mold and the construction method, the concrete can be unceasingly poured at a time, the construction method is easy and convenient to use, quality can be easily controlled, the integral type stair mold is high in rigidity, durable in use and capable of being repeatedly circulated and used when input once, the mold is installed and detached as a whole, and operation is easy.

Integral type stair mold and construction method of integral type stair mold

The invention relates to a construction method for a combined plate staircase. The construction method comprises the following steps that: a corresponding number of steel templates with the corresponding dimensions are manufactured according to the dimension of the staircase, wherein the steel templates comprise a bottom integral steel plate (1), middle standard pedaling templates (2) with the same number as the staircase steps, an upper pedaling template (3) and a lower pedaling template (4); the bottom integral steel plate (1) is manufactured according to the dimension of the staircase; the two ends of the bottom integral steel plate are bent; the bent upper end is used for being connected with an upper platform plate, and the bent lower end is used for being connected with a lower platform plate; the length of the bent upper end is identical to the width of the upper pedaling template (3), and the length of the bent lower end is identical to the width of the lower pedaling template (4); the staircase template is installed; a hoisting ring (6) is fixed; hanging to proper positions are performed, the upper pedaling template (3) is fixed on an upper platform beam through screw bolts, and the lower pedaling template (4) is fixed on a lower platform beam through screw bolts; and concrete is cast. The construction method has the advantages that the staircase construction operation can be simple; the staircase quality is improved; and the cost is reduced.

Construction method for combined plate staircase

The invention discloses a hidden well lid covering device. The hidden well lid covering device is characterized by comprising a well lid protecting cover and a protecting ring arranged around the well lid protecting cover in a sleeved mode. The well lid protecting cover comprises a circle of vertical cover wall and a bottom plate welded to the bottom of the cover wall, longitudinal and transverse steel bars attached to the bottom plate are welded inside the cover wall, the steel bars and the bottom plate are welded together, a plurality of pore plates are welded to the edge of the top of the cover wall, holes allowing the well lid protecting cover to be opened conveniently and engraved characters indicating the type of a well lid are arranged on the pore plates, and space used for paving pattern bricks or concrete or pitch is reserved in the cover wall. The hidden well lid covering device has the advantages of being simple in structure, convenient to use and attractive in appearance, effectively protecting the well lid against direct contact of ground vehicles or pedestrians, preventing the well lid from being crushed by the vehicles, and prolonging the service life of the well lid. The environment is beautified, the uniformity of a road is kept from the appearance, and the driving comfort degree can be improved. The device is used on a side pavement, and it can be guaranteed that a sidewalk for the blind is straight, smooth and uninterrupted.

Hidden well lid covering device and construction method thereof

The invention relates to the field of construction of municipal engineering, in particular to a wellhead position correction method. The wellhead position correction method comprises the following steps: measuring the reference width of a new well frame base, namely the distance between a pair of opposite corners of an original rectangular well frame in the width direction of a pavement; measuringthe reference length of a new well frame base, namely the distance between another pair of opposite corners of the original rectangular well frame in the length direction of the pavement; dismountingthe original rectangular well frame and the pavement facing layers at the four sides of the original rectangular well frame, exposing a pavement base layer, and constructing the new well frame base in a way that the length direction and the width direction of the new well frame base are separately parallel to the length direction and the width direction of the pavement; and covering the new wellframe base by adopting a plurality of rectangular frameless well covers. The length direction and the width direction of the new well frame base and the new frameless well covers are separately parallel to that of the pavement; the pavements on the frameless well covers and the pavements on road surfaces at the four sides of the frameless well covers are the same in grain direction, so the appearance is ensured to be beautiful, the pavements are saved, and a blind channel needs not bypass the well covers.

Wellhead position correction method

The utility model discloses a combined steel template of an integral stair plate, which comprises two side parallel main beams. Inclination of each main beam is same with that of an included angle between a stair segment and a horizontal surface. Two side parallel main beams are respectively provided with a plurality of pairs of mutually symmetrical angle steel tension rods, which correspond with spaces of stair steps. A square steel support is fixed at the back side of each angle steel tension rod. A step baffle plate is fixed at the backside of each square steel support. The combined steel template of the integral stair plate has the following advantages: simple and reasonable structure, high convenience in building field construction, high construction efficiency, high effect, easy batch production, basically no maintenance, and long service life.

Combined steel template of integral stair plate

The utility model discloses a stainless steel decorative paving well cover which comprises a supporting main body and a decorative face, wherein the supporting main body comprises a rectangular frame which is formed by combining a triangular stainless steel in a manner of welding, and a bottom plate is fixed to the bottom of the rectangular frame; a facing layer is filled in the rectangular frame The stainless steel decorative paving well cover has a simple and reasonable structure, and is scientific and reasonable in design, and convenient to open and maintain The stainless steel decorative paving well cover has high bearing capacity and attractive appearance, is easily processed and produced, can achieve mass customization in a plant, can be easily assembled in match with a field structure, has easiness in construction, can be matched with the ambient ground well through the shape, and achieves good effect of hiding The stainless steel decorative paving well cover has long service life that is predicated to be over 30 years through a trial and error; and due to high designability of the stainless steel decorative paving well cover, proper well covers can be designed for different areas or different environments

Stainless steel decorative paving well cover

The utility model discloses a novel self-closing type safety protective door. Inner stand columns are respectively arranged at two sides of a self-unloading platform, the inner stand columns at two sides are respectively provided with a hinged door body through a hinge, each of the inner stand columns at two sides inclines towards the inner side by an angle alpha, outer stand columns are respectively arranged at the outer sides of the inner stand columns at two sides, the outer side of each of the door bodies at two sides extends towards outwards to form an extension portion, and the width of each extension portion is larger than the distance between each outer stand column and each inner stand column. The novel self-closing type safety protective door achieves the purpose of automatic closing by utilizing the gravity of the door bodies, achieves self-closing, and eliminates the troublesome operation that the protective door is manually closed after each time of loading and unloading. After the novel self-closing type safety protective door is installed for use, human assistance is not needed in the process of closing the protective door, the protective door is closed automatically, and the self-closing rate reaches above 98%.

Novel self-closing type safety protective door

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Combined steel template of integral stair plate

Stainless steel decorative paving well cover

Novel self-closing type safety protective door