CN115637874B - Construction method for accurately installing heavy-duty member at bottom of floor slab - Google Patents
Construction method for accurately installing heavy-duty member at bottom of floor slab Download PDFInfo
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- CN115637874B CN115637874B CN202211533522.9A CN202211533522A CN115637874B CN 115637874 B CN115637874 B CN 115637874B CN 202211533522 A CN202211533522 A CN 202211533522A CN 115637874 B CN115637874 B CN 115637874B
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Abstract
The application relates to the technical field of construction measures for the existing building, and discloses a construction method for accurately installing a heavy-load member at the bottom of a floor slab, wherein an original beam is arranged below the existing floor slab, and the member to be installed is installed on the original beam; the member to be installed is connected with the original beam through a positioning connector, and the positioning connector is provided with an interface which is in butt joint with the member to be installed. According to the application, a jacking mode is adopted for material transfer, so that a heavy member to be installed and a positioning connector can smoothly reach an installation position and can be welded on a lifting vehicle smoothly; the universal ball table is adopted to assist constructors to adjust the positions and the postures of the positioning connectors and the components to be installed, so that various components can be smoothly positioned under the conditions that hoisting is impossible and the force applied by the constructors is limited; the adjusting table is provided with a locking device, and after the adjustment is finished, the adjusting table can support the universal table to avoid the disorder of the universal table.
Description
Technical Field
The application relates to the technical field of construction measures for existing buildings, in particular to a construction method for accurately installing heavy-duty components at the bottom of a floor slab.
Background
After the construction of the building is completed, it is sometimes necessary to install additional components under the existing floor, such as lamps and various decorative parts for finishing, and the laying of hydropower lines. The components are light, and can be smoothly conveyed to the installation position by adopting a manual transmission mode. However, in such special cases as reinforcement and diameter-changing of a building, it is necessary to provide a large number of steel members such as steel beams under the building floor, because it is necessary to resist the horizontal force. These steel members are heavy and cannot be transported to the installation site by hand, and therefore, require auxiliary transportation by means of construction equipment.
The most commonly used auxiliary lifting construction equipment in building construction is a chain block, but when the existing building floor is used for conveying members such as steel beams and the like by the chain block, various problems exist,
the first one is that the pulley of the chain block needs to be hung below the floor slab, but the installation position of the member to be transported is higher than that of the pulley of the chain block, and the chain block cannot pull the member to a position higher than that of the pulley; secondly, the component is hung by the chain block through the inhaul cable, the component cannot be fixed, and the subsequent welding step (only welding can meet the requirement of the connection strength in many scenes) cannot be performed; thirdly, the constructor is difficult to exert force in the occasion, and the position and the posture of the component are not adjusted if the component is slightly heavy.
The universal ball table is characterized in that a plurality of universal balls with bearing capacity are fixed on a steel plate to form a platform at a certain density, and the rolling of the universal balls is flexible, so that objects such as a working plate and a material box running on the universal balls can slide very flexibly, and the labor intensity of workers is greatly reduced.
Disclosure of Invention
The application provides a construction method for accurately installing a heavy-duty member at the bottom of a floor slab.
The technical problems to be solved are as follows: when heavy components are installed under the existing floor, the components are difficult to hoist, difficult to weld and adjust in position and posture.
In order to solve the technical problems, the application adopts the following technical scheme: a construction method for accurately installing a heavy-duty member at the bottom of a floor slab, wherein an original beam is arranged below the existing floor slab, and the member to be installed is installed on the original beam; the to-be-installed component is connected with the original beam through a positioning connector, and the positioning connector is provided with an interface which is in butt joint with the to-be-installed component; the component to be installed and the positioning connector are lifted to the installation position through the lifting vehicle, the top of the lifting vehicle is provided with an adjusting table for adjusting the positions of the positioning connector and the component to be installed, the positioning connector and the component to be installed are placed on the plane of the top of the adjusting table, the adjusting table is provided with two translational degrees of freedom in a horizontal plane, one rotational degree of freedom rotating around a vertical direction, and a locking device for locking the rotation and translation of the adjusting table;
the construction method comprises the following steps:
step one: installing a positioning connector;
lifting the positioning connector to the installation height through a lifting vehicle roof, 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: installing a member to be installed;
and jacking the member to be installed to the installation height, aligning with the butt joint interface of the positioning connector, performing preliminary fixation by adopting a bolt or a buckle, and then connecting with the positioning connector.
Further, the adjustment platform includes the universal ball table of spacing box and ball setting down in the spacing box that erects on the lift truck through the pillar, the upper surface of universal ball table is for being used for avoiding waiting to install the gliding coarse horizontal plane of component and location connector, the flat bottom box that upper end opening and border top are less than the upper surface of universal ball table is used for the spacing box, the board at universal ball table top is recorded as the ball table roof, and the lower surface of ball table roof is less than the top at the border of spacing box to can be at the direction removal in the range that spacing box border limited to arbitrary horizontal plane.
Further, the locating connector is installed in original roof beam side, locking device is the hand screw bolt that upwards pierces through the bottom plate central authorities of spacing box and with the bottom plate screw-thread fit of spacing box, hand screw bolt top level 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, layer board and hand screw bolt fixed connection.
Further, the limit box is a round flat box, the table top plate is a circular plate with the radius smaller than the inner radius of the limit box by at least 10 cm, and the support plate is a circular plate arranged in the center of the limit box; the universal balls of the universal ball table are arranged at the edge position of the bottom of the top plate of the ball table, the supporting plate is surrounded by the universal balls, when the center of the top plate of the ball table is aligned with the center of the bottom plate of the limit box up and down, the distance between the edge of the supporting plate and the universal balls is equal, the distance is marked as a, the difference between the radius of the plate at the top of the universal ball table and the inner radius of the limit box is marked as b, and a is not less than b.
Furthermore, before the universal ball table is locked, a gap for avoiding blocking 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 of the universal ball table is separated from the limit box by rotating the hand-screwed bolt to jack up the universal ball table, so that the locking of the universal ball table is completed; when the universal ball table is jacked, the hand-screwed bolt is rotated firstly to enable the supporting plate to be in contact with the ball table top plate, when the resistance is obviously raised during rotation, the supporting plate is indicated to be in contact with the ball table top plate, and then the hand-screwed bolt is rotated for one quarter circle to jack the universal ball table.
Further, the center of the bottom of the limit box is also provided with a skew-preventing nut which is in welded connection with the limit box, and the hand-screwed bolt sequentially passes through the skew-preventing nut and the limit box upwards to be in threaded fit with the skew-preventing nut.
Further, the positioning connector and the member to be installed are firstly hung on a lifting vehicle through a chain block hung on the original beam, and then lifted to the installation height through the lifting vehicle roof; in the first step, the constructor completes the installation of the positioning connector at the top of the lifting vehicle, and in the second step, the constructor completes the installation of the component to be installed on the movable scaffold close to the lifting vehicle.
Further, the chain block is hung on a lifting lug at the bottom of the original beam, and the lifting lug is welded with the original beam; the lifting vehicle is a vehicle-mounted scissor type lifting vehicle, and a chassis of the lifting vehicle is provided with a standing hoe; the top edge of the lifting vehicle is provided with an inclined strut which is propped against the floor where the lifting vehicle is positioned and is used for preventing the lifting vehicle from overturning.
Further, the original beam is an I-shaped steel beam with a flange plate horizontally arranged, and the member to be installed is an I-shaped steel beam with a flange plate vertically arranged; the positioning connector is a variable cross-section I-steel with one end butted with the member to be installed and the web plate at the other end gradually widened; the web plate at one end of the positioning connector, which is close to the original beam, is welded with the web plate of the original beam, the flange plate at one end of the positioning connector, which is close to the original beam, is welded with the web plate of the original beam through a connecting plate, and the connecting plates at 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 welded mode.
Further, the part of one flange plate of the positioning connector above the web plate is a blocking preventing and supplementing plate which is independently arranged with the web plate, and the blocking preventing and supplementing plate is welded with the web plate of the positioning connector; the positioning connector is in bolt-welding connection with a member to be installed;
the installation sequence of each component is as follows: the method comprises the steps of connecting plate installation, welding a positioning connector and the connecting plate, preventing and repairing plates from being welded, positioning a member to be installed, connecting the member to be installed with the positioning connector through a high-strength bolt to complete preliminary fixing, and welding a flange plate of the member to be installed with the positioning connector.
Compared with the prior art, the construction method for accurately installing the heavy-duty member at the bottom of the floor slab has the following beneficial effects:
according to the application, a jacking mode is adopted to transfer materials, so that heavy components to be mounted and positioning connectors can smoothly reach the mounting position and simultaneously can be welded on a lifting vehicle, and an adjusting table is adopted to assist constructors in adjusting the positions of the positioning connectors and the components to be mounted, so that various components can be smoothly positioned under the conditions that hoisting is impossible and the stress of constructors is limited;
according to the application, the movement of the universal ball table is limited by adopting the limiting box, so that the universal ball table and the components carried by the universal ball table are prevented from falling on the lifting vehicle, meanwhile, the limiting box is matched with the locking device, and after the position adjustment of the positioning connector and the components to be installed is completed, the universal ball table can be supported by the locking device to complete the position locking;
according to the application, the flange plate of the member to be installed is vertically arranged (the problem of welding with stress is solved), the positioning connector is arranged (the position and posture adjustment difficulty of the member to be installed is reduced), the member to be installed is only aligned with the end part of the positioning connector, the positioning connector is in bolt-welding connection with the member to be installed (the problem of welding the member to be installed in the air is solved by firstly fixing bolts and then welding), the blocking and supplementing plate is arranged on the positioning connector (the problem of blocking a welding gun by a floor slab) and the welding of the original beam and the member to be installed is successfully completed on the premise that the stress exists in the original beam and the floor slab exists on the original beam.
Drawings
FIG. 1 is a schematic view of the structure of a component to be installed, with most of the existing floor removed for ease of viewing, and only a small portion of the upper left and lower left corners;
FIG. 2 is an enlarged view of part of the portion A of FIG. 1;
FIG. 3 is a schematic construction view of the positioning connector;
FIG. 4 is a schematic view of the construction when installing the component to be installed, where the adjustment station is not installed with the post;
FIG. 5 is a schematic view of the structure of the adjustment table;
FIG. 6 is a schematic diagram of the positional relationship between the limit box and the universal table;
wherein, the floor slab comprises 11-existing floor slab, 12-original beam, 2-component to be installed, 3-positioning connector, 31-anti-blocking patch, 4-connecting plate and 5-chain block, 6-lifting car, 7-movable scaffold, 8-adjusting platform, 81-limit box, 82-universal ball table, 83-locker, 84-anti-skew nut.
Detailed Description
As shown in fig. 1 to 6, a construction method for accurately installing a heavy-duty member at the bottom of a floor slab, an existing floor slab 11 is provided with an original beam 12 under, and a member to be installed 2 is installed on the original beam 12; the member to be installed 2 is connected with the original beam 12 through a positioning connector 3, and the positioning connector 3 is provided with an interface which is in butt joint with the member to be installed 2; the to-be-installed component 2 and the positioning connector 3 are lifted to the installation position through the lifting vehicle 6, an adjusting table 8 for adjusting the positions of the positioning connector 3 and the to-be-installed component 2 is arranged at the top of the lifting vehicle 6, the positioning connector 3 and the to-be-installed component 2 are placed on the plane at the top of the adjusting table 8, and the adjusting table 8 is provided with two translational degrees of freedom in the horizontal plane, one rotational degree of freedom rotating around the vertical direction and a locking device for locking the rotation and translation of the adjusting table 8;
it is noted that the adjustment table 8 is preferably not of the orbital type, which is severely limited in the direction of movement, and the force required for pushing and pulling is also greater.
The construction method comprises the following steps:
step one: installing a positioning connector 3;
the positioning connector 3 is lifted to the installation height through the lifting car 6, then the position and the posture of the positioning connector 3 are adjusted by means of the adjusting table 8, and after the adjustment is finished, the adjusting table 8 is locked and the positioning connector 3 is connected with the original beam 12;
step two: mounting the member to be mounted 2;
the component 2 to be installed is lifted to the installation height, is preliminarily fixed by adopting bolts or buckles after being aligned with the butt joint interface of the positioning connector 3, and is then connected with the positioning connector 3.
The primary fixing is performed by using bolts or buckles, because the two connecting modes have the structure that one component is inserted into the other component, and the position alignment can be completed after the two connecting modes are connected, and even if the component 2 to be installed is not completely aligned with the positioning connector 3, the complete alignment can be ensured as long as the connection of the bolts or buckles is completed. Note that in the second step, the adjustment table 8 is not required to be locked after the member 2 to be mounted is in place, and the adjustment table 8 is movable, thereby facilitating the mounting of bolts.
As shown in fig. 5 to 6, the adjustment table 8 includes a limit box 81 erected on the lift truck 6 through a support column and a universal ball table 82 arranged in the limit box 81 with a ball facing downwards, the upper surface of the universal ball table 82 is a rough horizontal plane for avoiding sliding of the member 2 to be mounted and the positioning connector 3, the limit box 81 is a flat bottom box with an upper end opening and a lower edge top than the upper surface of the universal ball table 82, a plate on the top of the universal ball table 82 is denoted as a table top plate, and the lower surface of the table top plate is lower than the top of the edge of the limit box 81 and can move in any horizontal plane within the range limited by the edge of the limit box 81.
The universal table 82 is selected because it is fully rotatable while being movable in any direction in a plane with a simple structure and can be pushed with a small force even in an environment where the top is limited and working aloft.
The universal ball table 82 is typically used with the ball facing upward, but this can result in some complicated structure components not being able to move smoothly over it, and if a plate is to be padded over it, the pad plate can easily fall off the lift car 6. The universal ball station 82 is therefore optionally inverted for use and placed in a box that limits its tampering.
The locating connector 3 is installed in original roof beam 12 side, and locking device is the hand screw bolt that upwards pierces through the bottom plate center of spacing box 81 and with the bottom plate screw-thread fit of spacing box 81, and hand screw bolt top level is provided with the layer board that is used for holding up universal ball table 82, and the layer board setting is in the clearance of universal ball table 82, 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, layer board and hand screw bolt fixed connection.
Locking of the gimbaled table 82 is very difficult and is essentially not considered in its use scenario. The other concept is selected to lock the ball, namely, the ball is lifted to prevent the ball from operating. Since the positioning connector 3 is mounted on the side of the original beam 12, lifting a little (generally less than 1 mm) will not affect the normal mounting.
The limit 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 limit box 81, and the supporting plate is a circular plate arranged in the center of the limit box 81; the universal balls of the universal ball table 82 are arranged at the edge position of the bottom of the top plate of the ball table, the supporting plate is surrounded by the universal balls, when the center of the top plate of the ball table is aligned with the center of the bottom plate of the limit box 81 up and down, the distance between the edge of the supporting plate and the universal balls is equal, the distance is denoted 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 limit box 81 is denoted as b, and a is larger than or equal to b. Thereby ensuring that the universal stage 82 has sufficient play.
The round box circular plate without edges and corners which can cause clamping during rotation is selected. While the ball of the gimbals 82 is arranged along a circle to reduce drag during spin.
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 top plate of the ball table, and in the third step, the universal ball of the universal ball table 82 is separated from the limit box 81 by rotating the hand-screwed bolt to jack up the universal ball table 82, so that the locking of the universal ball table 82 is completed; when the universal ball table 82 is jacked up, the hand-screwed bolts are rotated first to enable the supporting plate to be in contact with the ball table top plate, when the rotating resistance is obviously raised, the supporting plate is indicated to be in contact with the ball table top plate, and then the hand-screwed bolts are rotated for one quarter circle to jack up the universal ball table 82.
The center of the bottom of the limit box 81 is also provided with a skew-preventing nut 84 welded with the limit box 81, and a hand-screwed bolt sequentially passes through the skew-preventing nut 84 and the limit box 81 upwards and is in threaded fit with the skew-preventing nut 84. Since only one hand-screwed bolt is provided here, if the bottom plate of the limit box 81 is thin, the hand-screwed bolt may be askew, and thus an anti-askew nut 84 is added.
As shown in fig. 3-4, the positioning connector 3 and the member to be installed 2 are firstly hung on the lifting car 6 through the chain block 5 hung on the original beam 12, and are lifted to the installation position through the lifting car 6; the positioning connector 3 and the member 2 to be mounted are heavy, and it is not practical to carry the positioning connector on the lifting car 6 by manpower.
In the first step, a constructor completes the installation of the positioning connector 3 at the top of the lifting car 6, and the positioning connector 3 is smaller, so that a large space is reserved at the top of the lifting car 6 for the constructor to fall down; in the second step, the constructor completes the installation of the member 2 to be installed on the movable scaffold 7 near the lift truck 6. The mobile scaffold 7 here may be a trolley or a split heads.
The chain block 5 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 lifting vehicle 6 is a vehicle-mounted scissor type lifting vehicle, and a chassis of the lifting vehicle 6 is provided with a standing hoe; the top edge of the lift truck 6 is provided with a diagonal bracing which is propped against the floor where the lift truck 6 is positioned and is used for preventing the lift truck 6 from overturning.
The original beam 12 is an I-shaped steel beam with a flange plate horizontally arranged, and the component 2 to be installed is an I-shaped steel beam with a flange plate vertically arranged. 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 present application, the original beam 12 is stressed, that is, the member 2 to be installed needs to be welded to the original beam 12 under the condition of being stressed in the original beam 12, which is contraindicated in the welding specification, because the original beam 12 is easily damaged. Simulation calculation and experiments of construction side show that in the welding process, if the welding surface is enlarged along the stress direction, the influence on the original beam 12 in the welding process can be minimized. The web of the component 2 to be mounted is thus arranged horizontally, so that the connecting surface of the component 2 to be mounted to the original beam 12 can be elongated as much as possible in the longitudinal direction of the original beam 12 by widening the web during welding. Meanwhile, the member 2 to be installed is not subjected to the bending moment applied from the outside, so that the flange plate is vertically arranged.
As shown in fig. 2, the member to be installed 2 is connected with the original beam 12 through the positioning connector 3, the positioning connector 3 is a variable cross-section i-steel with one end butted with the member to be installed 2 and the web of the other end gradually widened, the web of the end of the positioning connector 3 close to the original beam 12 is welded with the web of the original beam 12, and the flange plate of the 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 on two sides of the web of the original beam 12 are symmetrically arranged with the web as a symmetrical plane. The connection structure here is to satisfy the above-mentioned, ensuring that the connection surface of the member to be mounted 2 with the original beam 12 is sufficiently long. At the joint of the member to be mounted 2 and the original beam 12, the members to be mounted 2 on the two sides of the web of the original beam 12 are symmetrical with each other by taking the web as a symmetry plane, so that the member to be mounted 2 does not apply a bending moment to the web in the horizontal direction. The web of the positioning connector 3 is clamped between two adjacent connecting plates 4 and is respectively welded and connected with the two connecting plates 4. Note that in the connecting plate 4 on the same side, the middle part is mounted before the positioning connector 3, the rear parts on the two sides are mounted after the positioning connector 3, an internal angle is formed between the connecting plate 4 mounted firstly and the web plate of the original beam 12, an external angle corresponding to the internal angle is reserved on the web plate of the positioning connector 3, and the positioning of the positioning connector 3 is completed after the external angle is inserted into the internal angle. The contact position of the positioning connector 3 and the outer end of the rear-mounted connecting plate 4 is also provided with a notch so as not to influence the mounting of the rear-mounted connecting plate 4.
The member 2 to be installed is heavy, and the position and the posture of the heavy member are difficult to adjust under the condition of limited top and limited construction equipment, so that the positioning connector 3 is selected to be added, the positioning connector 3 is lighter, the position and the posture of the member 2 to be installed are easy to adjust, the member 2 to be installed only needs to be aligned with the positioning connector 3 after the member is installed, and the installation difficulty is greatly reduced.
The part of one flange plate of the positioning connector 3 above the web plate is a blocking preventing and repairing plate 31 which is independently arranged with the web plate, and the blocking preventing and repairing plate 31 is welded with the web plate of the positioning connector 3. Here, since the floor is present above the positioning connector 3, the welding work above the web of the positioning connector 3 cannot be performed unless the blocking plate 31 is provided. In the first and second steps, the installation sequence of each component is as follows: the method comprises the steps of installing a connecting plate 4, welding a positioning connector 3 and the connecting plate 4, installing and welding a blocking preventing patch 31, positioning a member to be installed 2, connecting the member to be installed 2 with the positioning connector 3 through a high-strength bolt to complete preliminary fixing, and welding a flange plate of the member to be installed 2 with the positioning connector 3.
The positioning connector 3 is connected with the member 2 to be installed in a bolt-welding mode, the connecting mode is a common connecting mode of I-steel beams, the web plate is connected through a steel plate arranged by a riding joint and a high-strength bolt penetrating the steel plate, and the flange plates are connected in a welding mode. The connection mode is selected instead of the simpler all-welded connection mode, because the floor slab exists above the member to be installed 2, the welding process of the member is severely limited, and the member to be installed 2 cannot be fixed by spot welding at all after being in place. Thus, the fixing is performed by high-strength bolts and then the welding is performed.
The above examples are only illustrative of the preferred embodiments of the present application and are not intended to limit the scope of the present application, and various modifications and improvements made by those skilled in the art to the technical solution of the present application should fall within the scope of protection defined by the claims of the present application without departing from the spirit of the present application.
Claims (8)
1. A construction method for accurately installing a heavy-duty member at the bottom of a floor slab is characterized in that an original beam (12) is arranged under an existing floor slab (11), and a member (2) to be installed is installed on the original beam (12); the method is characterized in that: the to-be-installed component (2) is connected with the original beam (12) through a positioning connector (3), and the positioning connector (3) is provided with an interface which is in butt joint with the to-be-installed component (2); the device is characterized in that the component (2) to be installed and the positioning connector (3) are lifted to an installation position through a lifting vehicle (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 vehicle (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 and one rotational degree of freedom rotating around the vertical direction, and a locking device for locking the rotation and translation of the adjusting table (8);
the construction method comprises the following steps:
step one: installing a positioning connector (3);
lifting the positioning connector (3) to the installation 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) and connecting the positioning connector (3) with the original beam (12) after the adjustment is finished;
step two: mounting a member (2) to be mounted;
jacking a member (2) to be installed to an installation height, aligning with a butt joint interface of a positioning connector (3), preliminarily fixing by adopting a bolt or a buckle, and then connecting with the positioning connector (3);
the adjusting table (8) comprises a limit box (81) erected on the lifting vehicle (6) through a support column and a universal ball table (82) arranged in the limit box (81) in a ball downward manner, the upper surface of the universal ball table (82) is a rough horizontal plane for preventing a member (2) to be installed and the positioning connector (3) from sliding, the limit box (81) is a flat bottom box with an opening at the upper end and a top lower than the upper surface of the universal ball table (82), a plate at the top of the universal ball table (82) is recorded as a ball table top plate, and the lower surface of the ball table top plate is lower than the top of the edge of the limit box (81) and can move in any horizontal plane within the limit range of the edge of the limit box (81);
the utility model discloses a ball table, including location connector (3), locating device, support plate, locating connector (3), locating device, support plate and hand screw bolt, the location connector (3) is installed in original roof beam (12) side, locking device is the hand screw bolt that upwards pierces through the bottom plate central authorities of spacing box (81) and with the bottom plate screw-thread fit of spacing box (81), hand screw bolt top level is provided with the support plate that is used for holding up universal ball table (82), the support plate sets up in the clearance of the universal ball of universal ball table (82), and the upper surface of support plate is for being used for avoiding ball table roof gliding coarse horizontal plane on the support plate, support plate and hand screw bolt fixed connection.
2. A construction method for accurately installing heavy load elements in a floor bottom according to claim 1, characterized by: the limit 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 limit box (81), and the support plate is a circular plate arranged in the center of the limit box (81); the universal balls of the universal ball table (82) are arranged at the edge position of the bottom of the top plate of the ball table, the supporting plate is surrounded by the universal balls, when the center of the top plate of the ball table is aligned with the center of the bottom plate of the limit box (81) up and down, the distance between the edge of the supporting plate and the universal balls is equal to the distance between the edge of the supporting plate and the universal balls, the distance is denoted 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 limit box (81) is denoted as b, and a is not less than b.
3. A construction method for accurately installing heavy load elements in a floor bottom according to claim 1, characterized by: 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 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 the universal ball of the universal ball table (82) is separated from the limit box (81), and the locking of the universal ball table (82) is completed; when the universal table (82) is jacked, the hand-screwed bolts are rotated first to enable the supporting plate to be in contact with the table top plate, when the resistance is obviously raised during rotation, the supporting plate is indicated to be in contact with the table top plate, and then the hand-screwed bolts are rotated for one quarter circle to jack the universal table (82).
4. A construction method for accurately installing heavy load elements in a floor bottom according to claim 1, characterized by: the center of the bottom of the limit box (81) is also provided with a skew-preventing nut (84) which is welded with the limit box (81), and the hand-screwed bolt sequentially passes through the skew-preventing nut (84) and the limit box (81) upwards and is in threaded fit with the skew-preventing nut (84).
5. A construction method for accurately installing heavy load elements in a floor bottom according to claim 1, characterized by: the positioning connector (3) and the component (2) to be installed are firstly hung on the lifting vehicle (6) through a chain block (5) hung on the original beam (12), and then are lifted to the installation height through the lifting vehicle (6); in the first step, constructors finish the installation of the positioning connector (3) at the top of the lifting vehicle (6), and in the second step, constructors finish the installation of the component (2) to be installed on the movable scaffold (7) close to the lifting vehicle (6).
6. A construction method for accurately installing heavy duty structures in a floor bottom according to claim 5, wherein: the chain block (5) 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 lifting vehicle (6) is a vehicle-mounted scissor-fork type lifting vehicle, and a chassis of the lifting vehicle (6) is provided with a standing hoe; the top edge of the lifting car (6) is provided with an inclined strut which is propped against the floor where the lifting car (6) is positioned and is used for preventing the lifting car (6) from overturning.
7. A construction method for accurately installing heavy load elements in a floor bottom according to claim 1, characterized by: the original beam (12) is an I-shaped steel beam with a flange plate horizontally arranged, and the component (2) to be installed is an I-shaped steel beam with a flange plate vertically arranged; the positioning connector (3) is a variable cross-section I-steel with one end butted with the member (2) to be installed and the web plate at the other end gradually widened; the web plate at one end of the positioning connector (3) close to the original beam (12) is welded with the web plate of the original beam (12), and the flange plate at one end of the positioning connector (3) close to the original beam (12) is welded with the web plate of the original beam (12) through the connecting plate (4), wherein the connecting plates (4) at 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 way.
8. A construction method for accurately installing heavy-duty structures in a floor bottom according to claim 7, wherein: the part of one flange plate of the positioning connector (3) above the web plate is a blocking preventing and repairing plate (31) which is independently arranged with the web plate, and the blocking preventing and repairing plate (31) is welded with the web plate of the positioning connector (3); the positioning connector (3) is connected with the member (2) to be installed in a bolt-welding way;
the installation sequence of each component is as follows: the method comprises the steps of installing a connecting plate (4), welding a positioning connector (3) with the connecting plate (4), installing and welding a blocking and repairing plate (31), positioning a member to be installed (2), connecting the member to be installed (2) with the positioning connector (3) through a high-strength bolt to finish preliminary fixing, and welding a flange plate of the member to be installed (2) with 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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| CN115637874A (en) | 2023-01-24 |
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