CN115637874A - Construction method for accurately mounting heavy-load component at bottom of floor slab - Google Patents
Construction method for accurately mounting heavy-load component at bottom of floor slab Download PDFInfo
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- CN115637874A CN115637874A CN202211533522.9A CN202211533522A CN115637874A CN 115637874 A CN115637874 A CN 115637874A CN 202211533522 A CN202211533522 A CN 202211533522A CN 115637874 A CN115637874 A CN 115637874A
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Abstract
The invention relates to the technical field of construction measures for the existing buildings, and discloses a construction method for accurately installing a heavy-load component at the bottom of a floor slab, wherein the existing floor slab is provided with an original beam, and a component to be installed is installed on the original beam; the component to be installed is connected with the original beam through a positioning connector, and the positioning connector is provided with an interface butted with the component to be installed. According to the invention, the material is transferred by adopting a jacking mode, so that heavy components to be installed and the positioning connectors can smoothly reach the installation position and can be smoothly welded on the lifting truck; the universal ball table is adopted to assist constructors to adjust the positions of the positioning connectors and the members to be installed, so that various members can be smoothly placed in place under the conditions that hoisting cannot be performed and the force of the constructors is limited; the adjusting table is provided with a locking device, and the universal table can be supported after the adjustment is finished, so that the universal table is prevented from being disturbed.
Description
Technical Field
The invention relates to the technical field of construction measures of existing buildings, in particular to a construction method for accurately installing a heavy-load component at the bottom of a floor slab.
Background
After the construction of a building is completed, it is sometimes necessary to install additional components under the existing floor, such as lamps and various decorative parts in finishing work, and the laying of water and electricity pipelines. The components are light, and can be smoothly transported to the installation position by means of manual transmission. However, in special situations, such as reinforcement or diameter-variable reconstruction of buildings, because horizontal force needs to be resisted, a plurality of steel members such as steel beams need to be additionally installed below the building floor. These steel members are heavy and cannot be transported to the installation site by means of manual transmission, and therefore need to be transported with the aid of construction equipment.
The most common auxiliary hoisting construction equipment in building construction is a chain block, but when the chain block is used for conveying members such as steel beams under the floor, various problems exist,
one is that the pulley of the chain block needs to be hung below the floor, but the installation position of the component to be transported is higher than the pulley of the chain block, and the chain block cannot pull the component to the position higher than the pulley; secondly, the chain block is hung on the component by virtue of the inhaul cable, the component cannot be fixed, and the subsequent welding step (only welding can meet the requirement of connection strength in many scenes) cannot be carried out; thirdly, the constructor is difficult to exert force under the situation, and the position and the posture of the member cannot be adjusted due to the fact that the member is heavy.
The universal ball table is formed by fixing a plurality of universal balls with bearing capacity on a steel plate at a certain density, and the universal balls roll flexibly, so that objects such as a working plate, a material box and the like running on the universal balls can slide flexibly, and the labor intensity of workers is greatly reduced.
Disclosure of Invention
The invention provides a construction method for accurately installing a heavy-load component at the bottom of a floor slab.
The technical problem to be solved is that: when a heavy member is installed under an existing floor, the lifting and welding are difficult, and the position and the posture of the member can be adjusted.
In order to solve the technical problems, the invention adopts the following technical scheme: a construction method for accurately installing a heavy-load component at the bottom of a floor slab, wherein an original beam is arranged below the existing floor slab, and the component to be installed is installed on the original beam; the component to be installed is connected with the original beam through a positioning connector, and the positioning connector is provided with an interface butted with the component to be installed; the component to be installed and the positioning connector are both jacked to an installation position through a lifting truck, an adjusting table for adjusting the positions of the positioning connector and the component to be installed is arranged at the top of the lifting truck, the positioning connector and the component to be installed are placed on a plane at the top of the adjusting table, and the adjusting table is provided with two translation freedom degrees in a horizontal plane, one rotation freedom degree rotating around the vertical direction, and a locking device for locking the rotation and translation of the adjusting table;
the construction method comprises the following steps:
the method comprises the following steps: installing a positioning connector;
jacking the positioning connector to the mounting height through a lifting vehicle, adjusting the position and the posture of the positioning connector by means of an adjusting table, and locking the adjusting table and connecting the positioning connector with the original beam after the adjustment is finished;
step two: mounting a component to be mounted;
jacking the component to be installed to the installation height, aligning the component to the butt joint interface of the positioning connector, then preliminarily fixing the component by using bolts or buckles, and then connecting the component to the positioning connector.
Further, the adjustment table includes erects the universal ball platform of setting up in spacing box down at spacing box and ball on the lift truck through the pillar, the upper surface of universal ball platform is for being used for avoiding treating the gliding coarse horizontal plane of mounting means and location connector, spacing box is lower than the flat bottom box of the upper surface of universal ball platform for upper end opening and border top, the board at universal ball platform top is marked as the ball platform roof, and the lower surface of ball platform roof is less than the top at the border of spacing box to can be in the within range that spacing box border restricted to the direction removal in arbitrary one horizontal plane.
Further, the location connector is installed in original roof beam side, locking device for upwards pierce through the bottom plate central authorities of spacing box and with the hand of the bottom plate screw-thread fit of spacing box twist the bolt, the hand is twisted bolt top level and is provided with the layer board that is used for holding up universal ball table, the layer board sets up in the clearance of the universal ball of universal ball table, and the upper surface of layer board is for being used for avoiding the gliding coarse horizontal plane of ball table roof on the layer board, bolt fixed connection is twisted with the hand to the layer board.
Furthermore, the limiting box is a round flat box, the top plate of the table is a circular plate with the radius smaller than that of the limiting box by at least 10 cm, and the supporting plate is a circular plate arranged in the center of the limiting box; the universal ball of the universal ball table is arranged at the edge of the bottom of the table top plate, the supporting plate is surrounded by the universal balls, when the center of the table top plate is vertically aligned with the center of the bottom plate of the limiting box, the distance between the edge of the supporting plate and each universal ball is equal and is marked as a, the difference value between the radius of the plate at the top of the universal ball table and the inner radius of the limiting box is marked as b, and a is larger than or equal to b.
Furthermore, before the universal ball table is locked, a gap for avoiding obstructing the movement of the universal ball table is reserved between the supporting plate and the ball table top plate, and in the third step, the universal ball table is jacked up by screwing a bolt through a rotating hand, so that a universal ball of the universal ball table is separated from the limiting box to complete the locking of the universal ball table; when the universal table is jacked up, the hand-screwed bolt is firstly rotated to enable the supporting plate to be in contact with the table top plate, when the resistance is obviously improved during rotation, the supporting plate is indicated to be in contact with the table top plate, and then the hand-screwed bolt is rotated for one quarter of a circle to jack up the universal table.
Furthermore, the center of the bottom of the limiting box is also provided with a skew-preventing nut which is connected with the limiting box in a welding mode, and the hand-screwed bolt sequentially penetrates through the skew-preventing nut and the limiting box and is in threaded fit with the skew-preventing nut.
Further, the positioning connector and the component to be installed are firstly hung on a lifting car through a chain block hung on the original beam, and then are jacked to the installation height through the lifting car; in the first step, the constructor completes the installation of the positioning connector at the top of the lift truck, and in the second step, the constructor completes the installation of the component to be installed on the movable scaffold close to the lift truck.
Further, the hand hoist is hung on a lifting lug at the bottom of the original beam, and the lifting lug is welded with the original beam; the lift truck is a vehicle-mounted scissor lift, and a chassis of the lift truck is provided with a hoe; the top edge of the lift car is provided with an inclined strut which is supported on a floor where the lift car is located and used for preventing the lift car from overturning.
Further, the original beam is an I-shaped steel beam horizontally arranged on the flange plate, and the member to be installed is an I-shaped steel beam vertically arranged on the flange plate; the positioning connector is a variable cross-section I-shaped steel, one end of the variable cross-section I-shaped steel is in butt joint with a component to be installed, and a web plate at the other end of the variable cross-section I-shaped steel gradually widens; the web plate of one end, close to the original beam, of the positioning connector is in welded connection with the web plate of the original beam, the flange plate of one end, close to the original beam, of the positioning connector is in welded connection with the web plate of the original beam through a connecting plate, and the connecting plates on two sides of the web plate of the original beam are symmetrically arranged by taking the web plate as a symmetrical plane; the web plate of the positioning connector is clamped between two adjacent connecting plates and is respectively connected with the two connecting plates in a welding mode.
Furthermore, the part of one flange plate of the positioning connector, which is positioned above the web plate, is a blocking and supplementing prevention plate which is independently arranged with the web plate, and the blocking and supplementing prevention plate is connected with the web plate of the positioning connector in a welding manner; the positioning connector is in bolt-welding connection with a component to be installed;
the mounting sequence of each part is as follows: mounting a connecting plate → welding a positioning connector and the connecting plate → welding a baffle-preventing and supplementing plate → positioning a component to be mounted → connecting the component to be mounted and the positioning connector through a high-strength bolt to complete primary fixation → welding a flange plate of the component to be mounted and the positioning connector.
Compared with the prior art, the construction method for accurately installing the heavy-load component at the bottom of the floor slab has the following beneficial effects:
according to the invention, a jacking mode is adopted for material transfer, so that heavy members to be installed and positioning connectors can smoothly reach installation positions and can be smoothly welded on a lift truck, and an adjusting platform is adopted to assist constructors in adjusting the poses of the positioning connectors and the members to be installed, so that various members can be smoothly put in place under the conditions that hoisting cannot be performed and force of the constructors is limited;
according to the invention, the movement of the universal ball table is limited by the limiting box, so that the universal ball table and the components carried by the universal ball table cannot fall off on the lift truck, and meanwhile, the limiting box is matched with the locking device, and after the pose adjustment of the positioning connector and the components to be installed is finished, the universal ball table can be lifted by the locking device to finish the pose locking;
according to the invention, the flange plates of the members to be installed are vertically arranged (the problem of welding with stress is solved), the positioning connectors are arranged (the difficulty in adjusting the pose of the members to be installed is reduced, the members to be installed only need to be aligned with the end parts of the positioning connectors), the positioning connectors are in bolted welding connection with the members to be installed (the problem that the members to be installed are welded in a flying mode due to bolt fixing and welding is solved), the anti-blocking and repairing plates are arranged on the positioning connectors (the problem that welding guns are blocked by floor slabs), and the welding of the original beams and the members to be installed is smoothly completed on the premise that the original beams have stress and the floor slabs are arranged on the original beams.
Drawings
Fig. 1 is a schematic structural view of a member to be installed after installation, in which most of the existing floor slab in the figure is removed and only a small part of the upper left corner and the lower left corner is reserved for convenient observation;
FIG. 2 is a partial enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of the construction of the positioning connector;
FIG. 4 is a schematic view of the construction in which the member to be installed is installed, where the adjustment table is not installed with the column;
FIG. 5 is a schematic view of the adjusting table;
FIG. 6 is a schematic diagram showing the position relationship between the position limiting box and the universal ball table;
the method comprises the following steps of 11-existing floor, 12-original beam, 2-component to be installed, 3-positioning connector, 31-anti-blocking compensation plate, 4-connecting plate, 5-chain block, 6-lifting vehicle, 7-moving scaffold, 8-adjusting table, 81-limiting box, 82-universal ball table, 83-locking device and 84-anti-skew nut.
Detailed Description
As shown in fig. 1-6, a construction method for accurately installing a heavy-duty member on the bottom of a floor slab, wherein an original beam 12 is arranged below an existing floor slab 11, and a member 2 to be installed is arranged on the original beam 12; the component 2 to be installed is connected with the original beam 12 through a positioning connector 3, and the positioning connector 3 is provided with an interface butted with the component 2 to be installed; the component 2 to be installed and the positioning connector 3 are both jacked to an installation position through a lifting truck 6, an adjusting table 8 for adjusting the positions of the positioning connector 3 and the component 2 to be installed is arranged at the top of the lifting truck 6, the positioning connector 3 and the component 2 to be installed are placed on a plane at the top of the adjusting table 8, and the adjusting table 8 is provided with two translational degrees of freedom in a horizontal plane, one rotational degree of freedom rotating around the vertical direction, and a locking device for locking the rotation and the translation of the adjusting table 8;
note that the adjustment table 8 is preferably not of the rail type, which is severely limited in the direction of movement and requires a greater force for pushing or pulling.
The construction method comprises the following steps:
the method comprises the following steps: installing a positioning connector 3;
jacking the positioning connector 3 to the installation height through the lifting vehicle 6, then adjusting the position and the posture of the positioning connector 3 by the aid of the adjusting table 8, and locking the adjusting table 8 after the adjustment is finished and connecting the positioning connector 3 with the original beam 12;
step two: mounting a member to be mounted 2;
jacking the component 2 to be installed to the installation height, aligning the butt joint interface of the positioning connector 3, then preliminarily fixing the component by using bolts or buckles, and then connecting the component with the positioning connector 3.
The reason why the bolt or the buckle is selected for preliminary fixing is that the two connection modes have a structure that one component is inserted into the other component, and the alignment of the positions can be completed after the connection, even if the component 2 to be installed and the positioning connector 3 are not completely aligned, the complete alignment can be ensured as long as the bolt or the buckle connection is completed. Note that in step two, the adjusting table 8 does not need to be locked after the member 2 to be installed is in place, and the adjusting table 8 is movable, so that bolt installation is facilitated.
As shown in fig. 5 to 6, the adjusting table 8 includes a limit box 81 erected on the lift truck 6 through a pillar and a universal ball table 82 with a ball downward arranged in the limit box 81, an upper surface of the universal ball table 82 is a rough horizontal plane for preventing the to-be-mounted component 2 and the positioning connector 3 from sliding, the limit box 81 is a flat-bottom box with an upper end opening and a top edge lower than the upper surface of the universal ball table 82, a plate at the top of the universal ball table 82 is referred to as a ball table top plate, a lower surface of the ball table top plate is lower than the top edge of the limit box 81, and the ball table top plate can move in any direction in the horizontal plane within a range limited by the edge of the limit box 81.
The universal ball table 82 is preferably used because it can be moved in any direction in a plane while being rotated and pushed with a small force with a simple structure, and can be smoothly used even in an environment where the top is limited and the work is high above the ground.
The gimbaled ball table 82 is typically used with the gimbaled ball mounted upward, but this results in complex structures that cannot be moved smoothly over the table, and if a plate is placed over the table, the plate can easily fall off the lift car 6. Thus, the universal ball table 82 is selected for use in an inverted position and placed in a box that limits play.
The positioning connector 3 is installed in original roof beam 12 side, locking device for upwards pierce through the bottom plate central authorities of spacing box 81 and with the hand of the bottom plate screw-thread fit of spacing box 81 twist the bolt, hand is twisted bolt top level and is provided with the layer board that is used for holding up universal ball platform 82, the layer board setting is in the clearance of the universal ball of universal ball platform 82, the upper surface of layer board is for being used for avoiding the gliding coarse horizontal plane of ball platform roof on the layer board, layer board and hand are twisted bolt fixed connection.
The locking of the gimbaled table 82 is difficult and is largely left out of consideration in its use scenario. Another idea is adopted to lock the universal ball, namely, to lift the universal ball to make the universal ball incapable of operating. Here, because the positioning connector 3 is installed on the side surface of the original beam 12, the normal installation is not affected by lifting a little bit (generally less than 1 mm).
The limiting box 81 is a round flat box, the top plate of the table is a circular plate with the radius at least 10 cm smaller than the inner radius of the limiting box 81, and the supporting plate is a circular plate arranged in the center of the limiting box 81; the universal balls of the universal ball table 82 are arranged at the edge of the bottom of the table top plate, the supporting plate is surrounded by the universal balls, when the center of the table top plate is aligned with the center of the bottom plate of the limiting box 81 up and down, the distance between the edge of the supporting plate and each universal ball is equal and is marked as a, the difference value between the radius of the plate at the top of the universal ball table 82 and the inner radius of the limiting box 81 is marked as b, and a is larger than or equal to b. Thereby ensuring sufficient play for the gimbaled ball table 82.
Round box disks without edges are selected here, and no edges are used which would cause jamming during rotation. Meanwhile, the universal ball of the universal ball table 82 is arranged along a circle, so that the resistance in rotation is reduced.
Before the universal ball table 82 is locked, a gap for avoiding blocking the movement of the universal ball table 82 is reserved between the supporting plate and the table top plate, and in the third step, the universal ball table 82 is jacked up by screwing a bolt through a rotating hand, so that a universal ball of the universal ball table 82 is separated from the limiting box 81 to complete the locking of the universal ball table 82; when the universal ball table 82 is jacked up, the hand-screwed bolt is firstly rotated to enable the supporting plate to be in contact with the table top plate, when the resistance is obviously improved during rotation, the supporting plate is indicated to be in contact with the table top plate, and then the hand-screwed bolt is rotated for one quarter circle to jack up the universal ball table 82.
The bottom center of the limiting box 81 is also provided with a skew-preventing nut 84 welded with the limiting box 81, and a hand-screwed bolt sequentially penetrates the skew-preventing nut 84 and the limiting box 81 upwards and is in threaded fit with the skew-preventing nut 84. Since only one hand bolt is provided, the hand bolt may be askew if the bottom plate of the stopper box 81 is thin, and thus a distortion prevention nut 84 is added.
As shown in fig. 3-4, the positioning connector 3 and the member 2 to be mounted are firstly hung on the lifting car 6 through the chain block 5 hung on the original beam 12, and are lifted to the mounting position through the lifting car 6; the positioning connector 3 and the component 2 to be installed are heavy and are not practical to be carried to the lift truck 6 by manpower.
In the first step, a constructor completes the installation of the positioning connector 3 on the top of the lift truck 6, and the positioning connector 3 is smaller, so that a large space is reserved on the top of the lift truck 6 for a worker to fall; in step two, the constructor completes the installation of the member to be installed 2 on the mobile scaffold 7 close to the lift truck 6. The mobile scaffold 7 here can be a trolley or a trestle.
The hand hoist is hung on a lifting lug at the bottom of the original beam 12, and the lifting lug is welded with the original beam 12; the lift truck 6 is a vehicle-mounted scissor lift, and a chassis of the lift truck 6 is provided with a hoe; the top edge of the lift car 6 has a diagonal brace that props up against the floor on which the lift car 6 is located to prevent the lift car 6 from tipping over.
The original beam 12 is an i-beam horizontally arranged on the flange plate, and the to-be-installed component 2 is an i-beam vertically arranged on the flange plate. It is expedient here for the flange plates of the component 2 to be mounted to be arranged vertically. In the construction process of the application, the original beam 12 is stressed, that is, the member 2 to be installed needs to be welded to the original beam 12 on the premise that the original beam 12 is stressed, which is the obstacle to the fact that the original beam 12 is damaged easily in the welding specifications. Through simulation calculation and experiments of a construction party, the influence on the original beam 12 in the welding process can be minimized if the welding surface is enlarged along the stress direction in the welding process. Therefore, the web of the component 2 to be mounted is horizontally arranged, so that the connecting surface of the component 2 to be mounted and the original beam 12 can be elongated as much as possible along the length direction of the original beam 12 by widening the web during welding. Meanwhile, the member 2 to be installed does not bear bending moment applied from the outside, so the flange plate is vertically arranged.
As shown in fig. 2, the component 2 to be installed is connected with the original beam 12 through the positioning connector 3, the positioning connector 3 is a section-variable i-shaped steel with one end butted with the component 2 to be installed and the web at the other end gradually widened, the web at one end of the positioning connector 3 close to the original beam 12 is welded with the web of the original beam 12, the flange plate at one end of the positioning connector 3 close to the original beam 12 is welded with the web of the original beam 12 through the connecting plate 4, and the connecting plates 4 at two sides of the web of the original beam 12 are symmetrically arranged by taking the web as a symmetrical plane. The connecting structure is designed to satisfy the above-mentioned requirement, and ensure that the connecting surface of the member 2 to be mounted and the original beam 12 is long enough. At the joint of the member 2 to be installed and the original beam 12, the members 2 to be installed on both sides of the web of the original beam 12 are also symmetrical with each other by taking the web as a symmetrical plane, so that the member 2 to be installed does not apply a bending moment in the horizontal direction to the web. The web plate of the positioning connector 3 is clamped between two adjacent connecting plates 4 and is respectively connected with the two connecting plates 4 in a welding manner. Note that in the connecting plate 4 on the same side, the middle is installed before the positioning connector 3, and the two sides are installed after the positioning connector 3, so that an internal corner is formed between the connecting plate 4 installed before and the original beam 12 web, an external corner corresponding to the internal corner is left on the web of the positioning connector 3, and the positioning of the positioning connector 3 is completed after the external corner is inserted into the internal corner. A gap is reserved at the contact position of the positioning connector 3 and the outer end of the connecting plate 4 to be mounted later, so that the mounting of the connecting plate 4 to be mounted later is not influenced.
The component 2 to be installed is heavy, and the position and the posture of the heavy component are difficult to adjust under the condition that the top is limited and the construction equipment which can be used for the component is limited, so that the positioning connector 3 is selected to be additionally arranged, the positioning connector 3 is light, the position and the posture of the component are easy to adjust, the component 2 to be installed only needs to be aligned with the positioning connector 3 after the component is installed, and the installation difficulty is greatly reduced.
The part of a flange plate of the positioning connector 3, which is located above the web plate, is a blocking and supplementing preventing plate 31 which is independently arranged with the web plate, and the blocking and supplementing preventing plate 31 is connected with the web plate of the positioning connector 3 in a welding manner. Here, since there is a floor above the positioning connection head 3, if the blocking prevention plate 31 is not provided, the welding work above the web of the positioning connection head 3 cannot be performed. In the first step and the second step, the installation sequence of each part is as follows: installing a connecting plate 4 → welding the positioning connector 3 and the connecting plate 4 → installing and welding the anti-blocking and supplementing plate 31 → positioning the component 2 to be installed → connecting the component 2 to be installed with the positioning connector 3 through a high-strength bolt to finish primary fixing → welding the flange plate of the component 2 to be installed with the positioning connector 3.
The positioning connector 3 is connected with the component 2 to be installed in a bolting-welding mode, the connecting mode is a common connecting mode of an I-shaped steel beam, a web plate is connected through a steel plate arranged in a seam and a high-strength bolt penetrating through the steel plate, and a flange plate is connected in a welding mode. This connection is chosen instead of the more simple full-welded connection because the floor is present above the component 2 to be installed, and therefore the welding process of the component is severely limited and the component 2 to be installed cannot be fixed by spot welding after it is in place. Therefore, the high-strength bolts are used for fixing and then welding is carried out.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. A construction method for accurately installing a heavy-load component at the bottom of a floor slab is characterized in that an original beam (12) is arranged below an existing floor slab (11), and a component (2) to be installed is installed on the original beam (12); the method is characterized in that: the component (2) to be installed is connected with the original beam (12) through a positioning connector (3), and the positioning connector (3) is provided with an interface which is butted with the component (2) to be installed; the mounting structure is characterized in that the to-be-mounted component (2) and the positioning connector (3) are jacked to a mounting position through a lifting vehicle (6), an adjusting platform (8) used for adjusting the position of the positioning connector (3) and the to-be-mounted component (2) is arranged at the top of the lifting vehicle (6), the positioning connector (3) and the to-be-mounted component (2) are placed on a plane at the top of the adjusting platform (8), and the adjusting platform (8) is provided with two translation degrees of freedom in a horizontal plane, one rotation degree of freedom rotating around the vertical direction, and a locking device used for locking the rotation and translation of the adjusting platform (8);
the construction method comprises the following steps:
the method comprises the following steps: installing a positioning connector (3);
jacking the positioning connector (3) to the mounting height through a lifting vehicle (6), then adjusting the position and the posture of the positioning connector (3) by means of an adjusting table (8), and locking the adjusting table (8) after the adjustment is finished and connecting the positioning connector (3) with the original beam (12);
step two: mounting a member (2) to be mounted;
jacking the component (2) to be installed to the installation height, aligning the component with the butt joint interface of the positioning connector (3), then preliminarily fixing the component by using a bolt or a buckle, and then connecting the component with the positioning connector (3).
2. A construction method for accurately installing a heavy load member on the bottom of a floor slab as claimed in claim 1, wherein: adjusting station (8) include and erect spacing box (81) and the ball on lift truck (6) through the pillar and set up universal ball platform (82) in spacing box (81) down, the upper surface of universal ball platform (82) is for being used for avoiding treating the gliding coarse horizontal plane of mounting means (2) and positioning connection head (3), spacing box (81) are the flat bottom box that upper end opening and border top are less than the upper surface of universal ball platform (82), the board at universal ball platform (82) top is marked as the ball table roof, and the lower surface of ball table roof is less than the top at the border of spacing box (81) to can be at the within range that spacing box (81) border was restricted to the direction removal in arbitrary one horizontal plane.
3. A construction method for accurately installing a heavy load member on the bottom of a floor slab as claimed in claim 2, wherein: location connector (3) are installed in original roof beam (12) side, locking device for upwards pierce through the bottom plate central authorities of spacing box (81) and with the hand of the bottom plate screw-thread fit of spacing box (81) screw bolt, hand is twisted bolt top level and is provided with the layer board that is used for holding up universal table (82), the layer board sets up in the clearance of the universal ball of universal table (82), and the upper surface of layer board is for being used for avoiding the gliding coarse horizontal plane of table roof on the layer board, the layer board is twisted bolt fixed connection with the hand.
4. A construction method for accurately installing a heavy load member on the bottom of a floor slab as claimed in claim 3, wherein: the limiting box (81) is a round flat box, the top plate of the table tennis table is a circular plate with the radius smaller than the inner radius of the limiting box (81) by at least 10 cm, and the supporting plate is a circular plate arranged in the center of the limiting box (81); the universal balls of the universal ball table (82) are arranged at the edge of the bottom of the table top plate, the supporting plate is surrounded by the universal balls, when the center of the table top plate is vertically aligned with the center of the bottom plate of the limiting box (81), the distance between the edge of the supporting plate and each universal ball is equal, the distance is marked as a, the difference between the radius of the plate at the top of the universal ball table (82) and the inner radius of the limiting box (81) is marked as b, and a is larger than or equal to b.
5. A construction method for accurately installing a heavy load member on the bottom of a floor slab as claimed in claim 3, wherein: before the universal ball table (82) is locked, a gap for avoiding obstructing the movement of the universal ball table (82) is reserved between the supporting plate and the ball table top plate, and in the third step, the universal ball table (82) is jacked up by rotating a hand-screwed bolt, so that a universal ball of the universal ball table (82) is separated from a limiting box (81) to complete the locking of the universal ball table (82); when the universal table (82) is jacked up, the hand-screwed bolt is firstly rotated to enable the supporting plate to be in contact with the table top plate, when the resistance is obviously improved during rotation, the supporting plate is indicated to be in contact with the table top plate, and then the hand-screwed bolt is rotated for a quarter of a circle to jack up the universal table (82).
6. A construction method for accurately installing a heavy load member on the bottom of a floor slab as claimed in claim 3, wherein: the central part of the bottom of the limiting box (81) is also provided with a skew-preventing nut (84) which is connected with the limiting box (81) in a welding way, and the hand-screwed bolt sequentially penetrates through the skew-preventing nut (84) and the limiting box (81) upwards and is in threaded fit with the skew-preventing nut (84).
7. A construction method for accurately installing a heavy load member on the bottom of a floor slab as claimed in claim 1, wherein: the positioning connector (3) and the component (2) to be installed are firstly hung on a lifting car (6) through a chain block (5) hung on an original beam (12), and then are jacked to the installation height through the lifting car (6); in the first step, constructors complete installation of the positioning connectors (3) on the top of the lift truck (6), and in the second step, constructors complete installation of the members (2) to be installed on a movable scaffold (7) close to the lift truck (6).
8. A construction method for accurately installing a heavy load member on the bottom of a floor slab as claimed in claim 7, wherein: the hand hoist is hung on a lifting lug at the bottom of the original beam (12), and the lifting lug is welded with the original beam (12); the lift truck (6) is a vehicle-mounted scissor lift, and a chassis of the lift truck (6) is provided with a hoe; the top edge of the lift truck (6) is provided with a diagonal brace which is propped on a floor where the lift truck (6) is located and used for preventing the lift truck (6) from overturning.
9. A construction method for accurately installing a heavy load member on the bottom of a floor slab as claimed in claim 1, wherein: the original beam (12) is an I-shaped steel beam with a horizontally arranged flange plate, and the component (2) to be installed is an I-shaped steel beam with a vertically arranged flange plate; the positioning connector (3) is a variable cross-section I-shaped steel, one end of the variable cross-section I-shaped steel is in butt joint with the component (2) to be installed, and a web plate at the other end of the variable cross-section I-shaped steel gradually widens; the web plate of one end, close to the original beam (12), of the positioning connector (3) is in welded connection with the web plate of the original beam (12), the flange plate of one end, close to the original beam (12), of the positioning connector (3) is in welded connection with the web plate of the original beam (12) through the connecting plate (4), and the connecting plates (4) on two sides of the web plate of the original beam (12) are symmetrically arranged by taking the web plate as a symmetrical plane; the web plate of the positioning connector (3) is clamped between two adjacent connecting plates (4) and is respectively connected with the two connecting plates (4) in a welding mode.
10. A construction method for accurately installing a heavy load member on the bottom of a floor slab as claimed in claim 9, wherein: the part, positioned above the web plate, of one flange plate of the positioning connector (3) is a blocking and supplementing preventing plate (31) which is independently arranged with the web plate, and the blocking and supplementing preventing plate (31) is connected with the web plate of the positioning connector (3) in a welding manner; the positioning connector (3) is connected with the component (2) to be installed in a bolt-welding manner;
the mounting sequence of each part is as follows: installing a connecting plate (4), welding the positioning connector (3) and the connecting plate (4), installing and welding the anti-blocking and supplementing plate (31), positioning the component to be installed (2), connecting the component to be installed (2) and the positioning connector (3) through a high-strength bolt to finish primary fixing, and welding the flange plate of the component to be installed (2) and the positioning connector (3).
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| CN217079155U (en) * | 2021-12-09 | 2022-07-29 | 北京市第三建筑工程有限公司 | Giant steel beam high-altitude butt joint auxiliary structure |
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| CA2449159A1 (en) * | 2003-01-23 | 2004-07-23 | The Mattamy Corporation | Skate, beam and transporter device and system for transferring and aligning manufactured houses |
| WO2004065726A1 (en) * | 2003-01-23 | 2004-08-05 | The Mattamy Corporation | Device and method for the removal of skate beams during the installation of a building |
| CN102071814A (en) * | 2010-12-16 | 2011-05-25 | 中建二局第三建筑工程有限公司 | High-rise long-span door type truss integral lifting device and construction method thereof |
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| CN115637874B (en) | 2023-08-18 |
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