Early-stripping formwork system for concreting of constructions comprising beams, slab and columns

An early-stripping formwork system for concreting of constructions comprising beams, slab and columns, comprising several standard formworks (1), props with multiple early-stripping support mechanisms (2), several filler beams (3) mainly used for supporting construction beams of floors, and filler panels, wherein the standard formwork (1) comprises a panel (11) and a formwork frame (12) and is in right-angle quadrilateral shape, and the formwork frame (12) of the standard formwork (1) is provided with L-shaped corners (121) at its four corners, wherein the early-stripping prop (2) comprises an upper support inner tube (21) and a lower support outer tube (22) which forms a telescopic connection, a rectangular head plate (23) is disposed at the top end of the upper support inner tube (21), and one corner of the head plate is complementary to an internal corner of any one of the L-shaped corners (121) on the formwork frame (12), a load-releasing mechanism (24) which causes the upper support inner tube (21) to descend by a predetermined height is connected between the upper support inner tube (21) and the lower support outer tube (22), an early stripping mechanism (25) for early stripping of the standard formwork (1) is disposed on the upper support inner tube (21), short posts (251) for supporting the formwork frame (12) are disposed at four corners of the early stripping mechanism (25), and a structure for preventing the formwork frame (12) from slipping outwards is formed between the short post (251) and the L-shaped corner (121), wherein the formwork frame (12) is in a detachable combined structure;

• and
• wherein the L-shaped corners (121) of the formwork frame (12) are fixedly connected with frame border beams (122) by bolts, the four frame border beams (122) form the rim of the formwork frame (12), a plurality of stiffening beams (123) are disposed between a set of two opposing frame border beams (122) therein, and the stiffening beams (123) are fixedly connected to the frame boarder beams (122) by bolts at both ends thereof;
• and that the L-shaped corners (121), the frame border beams (122) and the stiffening beams (123) each have a plane for supporting the panel (11);
• wherein the L-shaped corner (121) is in an integral structure;
• that the frame border beam (122) is formed by bending of a sheet material, the main structure of the frame border beam (122) is in the shape of an inequilateral angle iron, the length of a vertical side of the angle iron of the frame border beam (122) is larger than that of a horizontal side thereof, the frame border beam (122) is connected to the L-shaped corner (121) by the vertical side thereof, and stiffening structures are fixedly connected at connection locations on the frame border beam (122) where the frame border beam is connected with the L-shaped corner (121);
• that the stiffening beam (123) is formed by bending of a sheet material, the main structure of the stiffening beam (123) is in the shape of a channel steel, the channel opening of the stiffening beam (123) is provided in horizontal direction, connection blocks (123a) are fixedly connected at both ends of the stiffening beam (123), and the stiffening beam (123) is connected to the frame border beam (122) by the connection blocks (123a);
• and that the frame border beam (122) and the stiffening beam (123) are all provided with lightening holes for lightening weight thereof;
• and
• wherein the L-shaped corner (121) comprises a top angle iron (121a) and a bottom angle iron (121b) which are provided vertically and are in opposite internal angle directions, the top angle iron (121a) and the bottom angle iron (121b) are connected by a support plate (121c) which is provided horizontally and is supportable on an upper end face of any one of the short posts (251) of the early-stripping mechanism (25), and the bottom angle iron (121b) and the short post (251) form a structure for preventing the formwork frame (12) from slipping outwards;
• that support angle irons (121d) extend horizontally on two angle iron sides of the top angle iron (121a), a horizontal side of the support angle iron (121d) is located at an upper part of the top angle iron (121a), an upper plane of the horizontal side of the support angle iron (121d) is used for supporting the panel (11) of the standard formwork (1), the distance between the upper plane of the horizontal side of the support angel steel (121d) and an upper end face of the top angle iron (121a) is equal to the thickness of the panel (11), and a vertical side of the support angle iron (121d) is provided with frame border beams connection holes (121e) for connecting the support angle iron with the frame border beams (122);
• that the two angle iron sides of the top angle iron (121a) are provided with head plate connection holes (121f) for connecting the top angle iron with the head plate (23), auxiliary support holes (121g) are provided on the two angle iron sides of the bottom angle iron (121b) and are used as temporal supports which support the standard formwork (1) on the short posts (251) of the early stripping mechanism (25) in early stripping or installation of the standard formwork;
• that four uniformly distributed engaging lugs (231) further project downwards on a lower end face of the head plate (23), and the engaging lugs (231) are provided with through holes that fit head plate connection holes (121f) on any one of the angle iron sides of the top angle iron (121a);
• that the stiffening structure of the frame border beam (122) is protruding pads (122b) which are welded with the frame border beam (122), the frame border beam (122) is provided with connection through holes (122a) through which the frame border beam (122) is in fixed connection with the L-shaped corner (121) by bolts, and the connection through holes (122a) penetrate through the protruding pads (122b);
• that a lower end of the vertical side of the angle iron of the frame border beam (122) is bent towards the direction of the internal angle of the inequilateral angle iron thereof to form channel steel shaped stiffening structure, and the lightening holes provided on the frame border beams (122) are a plurality of frame border beam lightening holes (122c) positioned in the middle part of the vertical side of the angle iron;
• that the upper end face of the horizontal side of the angle iron of the frame border beam (122) is used for supporting the panel (11) of the standard formwork (251), a turnup (122e) for positioning the panel (11) extends upwards from the outer edge of the horizontal side of the angle iron of the frame border beam (122), the distance from an upper end face of the turnup (122e) to the upper end face of the horizontal side of the angle iron of the frame border beam (122) is equal to the thickness of the panel (11);
• that an outer end face of a side plate of the channel shape of the stiffening beam (123) is used for supporting the panel (11), two connection blocks (123a) are provided at each end of the stiffening beams (123), are fixedly by welding respectively, and are provided with threaded holes (123c) through which the stiffening beam (123) is fixedly connected to the corresponding frame border beam (122) by bolts;
• and that the lightening holes provided on the stiffening beams (123) are a plurality of weight lightening holes (123d) that are positioned on a base plate of the channel shape thereof.