CN113321146A - Single-side jacking safety protection device and safety jacking method for large-span reticulated shell structure - Google Patents
Single-side jacking safety protection device and safety jacking method for large-span reticulated shell structure Download PDFInfo
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- CN113321146A CN113321146A CN202110641568.1A CN202110641568A CN113321146A CN 113321146 A CN113321146 A CN 113321146A CN 202110641568 A CN202110641568 A CN 202110641568A CN 113321146 A CN113321146 A CN 113321146A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
- E04B2001/3588—Extraordinary methods of construction, e.g. lift-slab, jack-block using special lifting or handling devices, e.g. gantries, overhead conveying rails
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Abstract
The invention relates to a single-side jacking safety protection device and a safety jacking method for a large-span reticulated shell structure, wherein the safety protection device comprises a plurality of safety joints which are sequentially connected, a connecting transition pipe is inserted at the upper end of the uppermost safety joint, a supporting rib plate is arranged on the outer side surface of the connecting transition pipe, the supporting rib plate is in contact with the surface of a flange plate at the upper end of the safety joint, a semicircular groove is formed in the top of the connecting transition pipe, a connecting transverse pipe is arranged in the semicircular groove, U-shaped clamps are arranged at two ends of the connecting transverse pipe and fixed on the flange plate at the upper end of the safety joint, supporting rib plates are fixedly connected at two ends of the connecting transverse pipe, and one side of each supporting rib plate is an arc connecting edge; a pair of wedge blocks are arranged below the safety knot positioned at the lowest part, and sleepers are arranged below the wedge blocks. The safety protection device can effectively support the latticed shell structure under the condition that the local jacking device is unstable, and accidents are avoided.
Description
Technical Field
The invention relates to a jacking technology of a reticulated shell structure, in particular to a single-side jacking safety protection device and a safety jacking method of a large-span reticulated shell structure.
Background
The large-span reticulated shell structure is in unilateral jacking in-process, the one end ball joint of reticulated shell is as the pin joint, sits on the support, and the whole forms a hinge, carries out the jacking to the other end, and the biggest advantage of unilateral jacking's method is that the workman assembles on ground, the working face is big, work efficiency is high, the safety risk is little. The jacking device has the defects that when the jacking device is used for jacking, the top point can generate horizontal lateral displacement, and if the jacking device is not adjusted timely or is interfered by external force greatly, the jacking device is easy to lose stability, so that safety accidents are caused. Meanwhile, the difficulty is that in the jacking process, the latticed shell structure always generates displacement change, and safety measures are difficult to follow synchronously.
Disclosure of Invention
The invention aims to provide a single-side jacking safety protection device for a large-span reticulated shell structure, which solves the problem that no protection measure is available in the single-side jacking process of the conventional large-span reticulated shell structure, so that safety accidents are easy to happen.
The second purpose of the invention is to provide a single-side jacking safety jacking method for a large-span reticulated shell structure, so as to solve the problems that safety accidents are easy to happen in the single-side jacking process of the existing large-span reticulated shell structure and the safety measures are difficult to follow synchronously
One of the objects of the invention is achieved by: a large-span net shell structure unilateral jacking safety protection device comprises a plurality of safety sections which are sequentially connected, wherein a connecting transition pipe is inserted at the upper end of the uppermost safety section, a supporting rib plate is arranged on the outer side surface of the connecting transition pipe, the supporting rib plate is in contact with the surface of a flange plate at the upper end of the safety section, a semicircular groove is formed in the top of the connecting transition pipe, a connecting transverse pipe is arranged in the semicircular groove, U-shaped clamps are arranged at two ends of the connecting transverse pipe, the U-shaped clamps are fixed on the flange plate at the upper end of the safety section, support rib plates are fixedly connected at two ends of the connecting transverse pipe, and one side of each support rib plate is an arc-shaped connecting edge; a pair of wedge blocks are arranged below the safety knot positioned at the lowest part, and sleepers are arranged below the wedge blocks.
The two support rib plates are respectively positioned at two sides of the connecting transition pipe.
And the connecting arm of the U-shaped clamp is connected in the bolt hole on the flange plate of the safety joint in a penetrating manner.
The second purpose of the invention is realized by the following steps: a single-side jacking safety jacking method for a large-span reticulated shell structure comprises the following steps:
a. the hinged support is arranged on the ground, the hinged support is used as a hinged joint to splice the latticed shell structure, a ball joint at one end of the latticed shell structure is hinged to the hinged support, and the other end of the latticed shell structure is a free end.
b. Jacking the free end of the reticulated shell structure by using a jacking device, and splicing the free end of the reticulated shell structure after jacking to form a new free end.
c. Repeating the previous step until the spliced latticed shell structure is one third of the whole latticed shell structure, the single-side jacking safety protection device of the large-span reticulated shell structure is arranged near the jacking device in the jacking process, and comprises a plurality of safety joints which are connected in sequence, the upper end of the safety joint positioned at the top is inserted with a connecting transition pipe, the outer side surface of the connecting transition pipe is provided with a supporting rib plate, the supporting rib plate is contacted with the surface of a flange plate at the upper end of the safety joint, a semicircular groove is arranged at the top of the connecting transition pipe, a connecting transverse pipe is arranged in the semicircular groove, u-shaped clamps are arranged at two ends of the connecting transverse pipe and fixed on a flange plate at the upper end of the safety joint, support rib plates are fixedly connected to two ends of the connecting transverse pipe, and one side of each support rib plate is an arc-shaped connecting edge.
d. The two support rib plates and the connecting transverse pipe are welded into a whole, and the connecting edges of the support rib plates are welded on the ball joints of the grid structure.
e. The transition pipe is inserted into the upper end of the safety joint, the safety joint inserted with the transition pipe is placed below the connecting transverse pipe along with the lifting of the latticed shell structure, and the safety joint, the transition pipe and the connecting transverse pipe are connected through the U-shaped clamp.
f. After the safety joint is installed on the latticed shell structure, a gap between the lower end of the safety joint and the ground is filled through the wedge-shaped block and the sleeper, when the distance between the lower end of the safety joint and the ground is equal to the height of the safety joint, a new safety joint is additionally installed between the safety joint and the ground, the process is repeated, and the large-span latticed shell structure unilateral jacking safety protection device always jacks up the latticed shell structure.
j. The single-side jacking safety protection device of the large-span reticulated shell structure moves outwards along with the jacking device until the construction of the whole reticulated shell structure is completed, if no obstacle exists in a construction site, a gap between the free end of the reticulated shell and the ground is filled, the jacking device and the single-side jacking safety protection device of the large-span reticulated shell structure are moved, if an obstacle exists in the construction site, a new jacking device/large-span reticulated shell structure single-side jacking safety protection device is arranged at the jacking point at the outer side of the middle position in the arrangement direction of the existing jacking device/large-span reticulated shell structure single-side jacking safety protection device, and then, sequentially transferring the existing single-side jacking safety protection device of the jacking device/large-span latticed shell structure to two sides of a new jacking device/large-span latticed shell structure from the middle part until the original single-side jacking safety protection device of the jacking device/large-span latticed shell structure is completely moved out.
In the step f, when the distance between the lower end of the safety joint and the ground is smaller than the height of one sleeper, a pair of wedge blocks are placed below the safety joint, the safety joint is kept in a tight jacking state through the combination of the wedge blocks, when the distance between the lower end of the safety joint and the ground is larger than the height of one sleeper, a layer of sleeper is additionally arranged below the wedge blocks, the sleeper is continuously increased along with the continuous lifting of the free end of the grid structure until the distance between the lower end of the safety joint and the ground is the height of one safety joint, the stacked wedge blocks and sleepers are replaced by the safety joint, and the safety joint is continuously additionally arranged in sequence.
The number of the safety nodes of the large-span reticulated shell structure unilateral jacking safety protection device is less than or equal to 5, and when the number of the safety nodes reaches 5, the large-span reticulated shell structure unilateral jacking safety protection device moves to the outer side.
The height of the safety section of the large-span reticulated shell structure unilateral jacking safety protection device is consistent with the height of the standard section of the jacking device.
In the step f, after a new safety joint is added on the existing safety joint, the safety joint is rotated around the connecting transverse pipe, and the angle of the safety joint is adjusted to enable the safety joint to be perpendicular to the ground.
The single-side jacking safety protection device of the large-span reticulated shell structure provided by the invention is matched with the jacking device to synchronously support the reticulated shell structure, the support rib plates are welded on the connecting transverse pipe, but the connecting transverse pipe can rotate around the axis of the connecting transverse pipe, so that the angle between the support rib plates and the connecting transition pipe is adjusted, and the connecting transition pipe and the safety joint of the reticulated shell structure can be kept vertical to the ground in the jacking process. The connection transition pipe is inserted at the top end of the safety joint, so that the support rib plate is away from the flange plate at the top of the safety joint by a certain distance, and when the support rib plate swings around the axis of the connection transverse pipe, the support rib plate, the spherical joint of the reticulated shell structure and the grid structure cannot interfere with the safety joint. Be provided with wedge and sleeper at the safety festival lower extreme, can fill through the wedge to very little interval, fill through the mode of stack sleeper to bigger interval to fill the interval between sleeper and the safety festival lower extreme through the wedge, support through establishing the safety festival additional to great interval, remaining interval is filled by wedge and sleeper.
The unilateral jacking safety protection device for the large-span reticulated shell structure is convenient to use, can be used for effectively assisting and supporting the reticulated shell structure, always keeps a jacking state, can be used for effectively supporting the reticulated shell structure at any time in the jacking process, and can be used for effectively supporting the reticulated shell structure under the condition of instability of a local jacking device so as to avoid accidents.
The invention relates to a unilateral jacking safety jacking method of a large-span reticulated shell structure, which is characterized in that after a part of the reticulated shell structure is spliced in the construction process of the reticulated shell structure, the load per unit area of a jacking device reaches a certain value and has certain danger, a unilateral jacking safety protection device of the large-span reticulated shell structure is arranged near the jacking device, the unilateral jacking safety protection device of the large-span reticulated shell structure is arranged on the reticulated shell structure according to a certain sequence along with the continuous increase of the lifting height of the mounting point of the unilateral jacking safety protection device of the large-span reticulated shell structure, and the safety nodes are continuously increased, so that the unilateral jacking safety protection device of the large-span reticulated shell structure is always in a jacking state, the continuous, stable and effective support to the reticulated shell structure is ensured, and the unilateral jacking safety protection device of the large-span reticulated shell structure moves along with the jacking device, make the unilateral jacking safety arrangement of large-span net shell structure can play the safety guarantee effect at any time, guarantee the safety in the whole work progress, avoid causing the accident of collapsing because the jacking device breaks down.
The unilateral jacking safety jacking method for the large-span reticulated shell structure can guarantee safety in the unilateral jacking construction process of the large-span reticulated shell structure, can keep verticality and support effectiveness, and is simple and effective to operate.
Drawings
Fig. 1 is a structural diagram of the single-side jacking safety protection device of the large-span latticed shell structure.
Fig. 2 is a view from a-a of fig. 1.
Fig. 3 is a block diagram of the seat web of the present invention.
FIG. 4 is a top view of a connecting transition duct of the present invention.
Fig. 5 is a schematic diagram of single-side jacking of the large-span latticed shell structure.
In the figure: 1. the single-side jacking safety protection device of the large-span reticulated shell structure; 2. a jacking device; 3. a reticulated shell structure; 4. a ball node; 1-1, safety section; 1-2, a flange plate; 1-3, connecting a transition pipe; 1-4, supporting the rib plate; 1-5, connecting a horizontal pipe; 1-6, U-shaped card; 1-7, a support rib plate; 1-8, wedge-shaped blocks; 1-9, crosstie; 1-10, connecting edges; 1-11, a semicircular groove; 1-12, bolt holes; 1-13, connecting groove.
Detailed Description
As shown in figures 1, 2, 3 and 4, the single-side jacking safety protection device 1 of the large-span latticed shell structure 3 comprises a plurality of safety joints 1-1 which are sequentially connected from top to bottom, a connecting transition pipe 1-3 is inserted at the upper end of the uppermost safety joint 1-1, a supporting rib plate 1-4 is fixed on the outer side surface of the connecting transition pipe 1-3, the supporting rib plate 1-4 is contacted with the surface of a flange plate 1-2 at the upper end of the safety joint 1-1 so as to limit the position of the connecting transition pipe 1-3, a semicircular groove 1-11 is arranged at the top of the connecting transition pipe 1-3, a horizontal connecting transverse pipe 1-5 is arranged in the semicircular groove 1-11, U-shaped clamps 1-6 are arranged at the two ends of the connecting transverse pipe 1-5, the U-shaped clamps 1-6 are fixed on the flange plate 1-2 at the upper end of the safety joint 1-1, support rib plates 1-7 are fixedly connected to two ends of the connecting transverse pipes 1-5, one sides of the support rib plates 1-7 are arc-shaped connecting edges 1-10, and ball joints 4 of the reticulated shell structures 3 are attached to the connecting edges 1-10 and fixed together through welding.
A pair of wedge blocks 1-8 is arranged below the safety joint 1-1 which is positioned at the lowest part, the inclined surfaces of the two wedge blocks 1-8 are mutually attached, and the total height of the two wedge blocks 1-8 is adjusted by moving the relative positions of the two wedge blocks 1-8.
And sleepers 1-9 are arranged below the wedge-shaped blocks 1-8, two sleepers 1-9 are arranged on each layer, and the two adjacent layers of sleepers 1-9 are vertical to each other.
The two support rib plates 1-7 are respectively positioned at two sides of the connecting transition pipe 1-3, and when the support rib plates 1-7 rotate around the connecting transverse pipe 1-5, the support rib plates do not interfere with the connecting transition pipe 1-3.
One end of the support rib plate 1-7 provided with the connecting edge 1-10 extends outwards for a certain distance, so that the ball joint 4 arranged on the support rib plate 1-7 cannot interfere with the connecting transition pipe 1-3.
The connecting arm of the U-shaped clamp 1-6 is connected in a penetrating way in a bolt hole 1-12 on a flange plate 1-2 of the safety joint 1-1, and the U-shaped clamp 1-6 is fixed by directly utilizing the bolt hole 1-12 of the flange plate 1-2, so that the connecting transverse pipe 1-5 is fixed.
Certain gaps are left when the U-shaped clamps 1-6 are used for fixedly connecting the transverse pipes 1-5, so that the transverse connecting pipes 1-5 can rotate relative to the connecting transition pipes 1-3.
As shown in figure 3, the lower ends of the support rib plates 1-7 are provided with connecting grooves 1-13, and connecting cross bars are placed in the connecting grooves 1-13 and fixed through welding.
The single-side jacking safety protection device 1 of the large-span reticulated shell structure 3 is matched with the jacking device 2 to synchronously support the reticulated shell structure 3, the support rib plates 1-7 are welded on the connecting transverse pipes 1-5, but the connecting transverse pipes 1-5 can rotate around the axes of the connecting transverse pipes, so that the angles between the support rib plates 1-7 and the connecting transition pipes 1-3 are adjusted, and the connecting transition pipes 1-3 and the safety joints 1-1 of the reticulated shell structure 3 can be kept vertical to the ground in the jacking process. The connecting transition pipe 1-3 is inserted at the top end of the safety joint 1-1, so that the support rib plate 1-7 is away from the flange plate 1-2 at the top of the safety joint 1-1 by a certain distance, and when the support rib plate 1-7 swings around the axis of the connecting transverse pipe 1-5, the support rib plate 1-7, the spherical joint 4 of the reticulated shell structure 3 and the grid structure cannot interfere with the safety joint 1-1.
The lower end of the safety joint 1-1 is provided with a wedge block 1-8 and a sleeper 1-9, a small distance can be filled through the wedge block 1-8, a larger distance is filled in a mode of overlapping the sleepers 1-9, the distance between the sleeper 1-9 and the lower end of the safety joint 1-1 is filled through the wedge block 1-8, a larger distance is supported through the safety joint 1-1, and the rest distance is filled through the wedge block 1-8 and the sleeper 1-9.
The single-side jacking safety protection device 1 for the large-span reticulated shell structure 3 is convenient to use, can effectively assist and support the reticulated shell mechanism, always keeps a jacking state, can effectively support the reticulated shell structure 3 at any time in the jacking process, and can effectively support the reticulated shell structure 3 under the condition of instability of the local jacking device 2, so that accidents are avoided.
As shown in fig. 5, the single-side jacking safety jacking method for the large-span reticulated shell structure 3 of the invention comprises the following steps:
the hinged support is arranged on the ground, the hinged support is used as a hinged joint to splice the latticed shell structure 3, the ball joint 4 at one end of the latticed shell structure 3 is hinged to the hinged support, and the other end of the latticed shell structure 3 is a free end. When the latticed shell structure 3 is jacked up, the latticed shell structure 3 can rotate around the hinged support.
Jacking is carried out on the free end of the latticed shell structure 3 by using the jacking device 2, and the free end of the latticed shell structure 3 after jacking is spliced to form a new free end.
Repeating the previous step until the spliced latticed shell structure 3 is one third of the whole latticed shell structure 3, adding the single-side jacking safety protection device 1 of the large-span latticed shell structure 3, and adding the single-side jacking safety protection device 1 of the large-span latticed shell structure 3 in the jacking process of the jacking device 2.
Wherein, the unilateral jacking safety protection device 1 of the large-span reticulated shell structure 3 comprises a plurality of safety joints 1-1 which are connected in sequence, a connecting transition pipe 1-3 is inserted at the upper end of the uppermost safety joint 1-1, a supporting rib plate 1-4 is arranged on the outer side surface of the connecting transition pipe 1-3, the supporting rib plate 1-4 is contacted with the surface of a flange plate 1-2 at the upper end of the safety joint 1-1, a semicircular groove 1-11 is arranged at the top of the connecting transition pipe 1-3, a connecting transverse pipe 1-5 is arranged in the semicircular groove 1-11, U-shaped clamps 1-6 are arranged at the two ends of the connecting transverse pipe 1-5, the U-shaped clamps 1-6 are fixed on the flange plate 1-2 at the upper end of the safety joint 1-1, and support rib plates 1-7 are fixedly connected at the two ends of the connecting transverse pipe 1-5, one side of the support rib plate 1-7 is an arc-shaped connecting edge 1-10.
When the single-side jacking safety protection device 1 of the large-span reticulated shell structure 3 is installed, firstly, two support rib plates 1-7 and a connecting transverse pipe 1-5 are welded into a whole, and connecting edges 1-10 of the support rib plates 1-7 are welded on ball nodes 4 of the reticulated shell structure according to a design angle.
The connection transition pipe 1-3 is inserted at the upper end of the safety joint 1-1, along with the lifting of the latticed shell structure 3, the space below the ball joint 4 is larger and larger, when the safety joint 1-1 can be accommodated, the safety joint 1-1 inserted with the connection transition pipe 1-3 is placed below the connection transverse pipe 1-5, and the safety joint 1-1, the connection transition pipe 1-3 and the connection transverse pipe 1-5 are connected through the U-shaped clamp 1-6, so that the first safety joint 1-1 is hung on the ball joint 4, and the angle of the safety joint 1-1 is adjusted to enable the safety joint to be perpendicular to the ground.
After the safety joint 1-1 is installed on the latticed shell structure 3, a gap between the lower end of the safety joint 1-1 and the ground is filled through the wedge-shaped blocks 1-8 and the sleepers 1-9 until the distance between the lower end of the safety joint 1-1 and the ground is equal to the height of the safety joint 1-1, a new safety joint 1-1 is additionally installed between the safety joint 1-1 and the ground, and the process is repeated, so that the single-side jacking safety protection device 1 of the large-span latticed shell structure 3 always jacks the latticed shell structure 3.
When the distance between the lower end of the safety joint 1-1 and the ground is smaller than the height of one sleeper 1-9, a pair of wedge blocks 1-8 are placed below the safety joint 1-1, the safety joint 1-1 is kept in a tight jacking state through the involution of the wedge blocks 1-8, when the distance between the lower end of the safety joint 1-1 and the ground is larger than the height of one sleeper 1-9, a layer of sleeper 1-9 is added below the wedge blocks 1-8, the sleepers 1-9 are continuously increased along with the continuous lifting of the free end of the grid structure until the lower end of the safety joint 1-1 is at the height of one safety joint 1-1 from the ground, the stacked wedge blocks 1-8 and the sleepers 1-9 are replaced by the safety joint 1-1, and the safety joint 1-1 is added in sequence by repeating the same operation.
After a new safety joint 1-1 is added on the existing safety joint 1-1, the safety joint 1-1 is rotated around the connecting transverse pipe 1-5, and the angle of the safety joint 1-1 is adjusted to enable the safety joint to be vertical to the ground.
In the jacking process, the jacking device 2 needs to be moved outwards for multiple times, and the single-side jacking safety protection device 1 of the large-span reticulated shell structure 3 also moves outwards along with the jacking device 2 until the construction of the whole reticulated shell structure 3 is completed.
If no barrier exists in the construction site, the jacking device 2 and the single-side jacking safety protection device 1 of the large-span reticulated shell structure 3 are moved after a gap between the free end of the reticulated shell and the ground is filled.
If there is the barrier in the job site, the latticed shell structure 3 can not be transferred, and can only be supported through the jacking device 2 and the large-span latticed shell structure 3. Then need set up two new jacking devices 2 earlier, new jacking device 2 is located the outside of having jacking device 2, and it is corresponding with two jacking devices 2 of intermediate position on the array orientation of having jacking device 2, then start transferring in proper order to new jacking device 2's both sides with having jacking device 2 from the middle part, until shifting out original jacking device 2 is whole, finally can go out two more jacking devices 2, use as new jacking device 2 when being used for next time moving. In the same way, a new single-side jacking safety protection device 1 of the large-span reticulated shell structure 3 is arranged at a jacking point on the outer side of the middle position in the arrangement direction of the single-side jacking safety protection device 1 of the existing large-span reticulated shell structure 3, and then the single-side jacking safety protection device 1 of the existing large-span reticulated shell structure 3 is sequentially transferred to the two sides of the single-side jacking safety protection device 1 of the new large-span reticulated shell structure 3 from the middle part until the single-side jacking safety protection device 1 of the original large-span reticulated shell structure 3 is completely shifted out.
The number of the safety nodes 1-1 of the general large-span reticulated shell structure 3 single-side jacking safety protection device 1 is less than or equal to 5, when the number of the safety nodes 1-1 reaches 5, the position of the large-span reticulated shell structure 3 single-side jacking safety protection device 1 needs to be moved to the outer side, so that the total height of the large-span reticulated shell structure 3 single-side jacking safety protection device 1 is controlled, the total height of the large-span reticulated shell structure 3 single-side jacking safety protection device is maintained below a certain height, and the supporting stability and the safety of the large-span reticulated shell structure 3 single-side jacking safety protection device 1 are guaranteed.
The height of the safety joint 1-1 of the single-side jacking safety protection device 1 of the large-span reticulated shell structure 3 is consistent with that of the standard joint of the jacking device 2. The design that the height of the safety joint and the height of the standard joint of the jacking device are equal has the following advantages: 1. the synchronous mounting and dismounting are convenient; 2. the height of the jacking hydraulic cylinder is 1300, and the stress is reasonable; 3. is convenient for repeated turnover use and can be exchanged when needed urgently.
The invention relates to a single-side jacking safety jacking method of a large-span reticulated shell structure 3, which is characterized in that after the reticulated shell structure 3 is partially spliced in the construction process of the reticulated shell structure 3, because the load per unit area of a jacking device 2 reaches a certain value and has certain danger, a single-side jacking safety protection device 1 of the large-span reticulated shell structure 3 is arranged near the jacking device 2, the single-side jacking safety protection device 1 of the large-span reticulated shell structure 3 is arranged on the reticulated shell structure 3 according to a certain sequence along with the continuous increase of the lifting height of the mounting point of the single-side jacking safety protection device 1 of the large-span reticulated shell structure 3, and the safety nodes 1-1 are continuously increased, so that the single-side jacking safety protection device 1 of the large-span reticulated shell structure 3 is always in a jacking state, the continuous stable and effective support of the reticulated shell structure 3 is ensured, and the single-side jacking safety protection device 1 of the large-span reticulated shell structure 3 moves along with the jacking device 2, make 3 unilateral jacking safety arrangement 1 of large-span net shell structure can play the safety guarantee effect at any time, guarantee the safety in the whole work progress, avoid causing the accident of collapsing because jacking device 2 breaks down.
The safe jacking method for the unilateral jacking of the large-span latticed shell structure 3 can guarantee the safety of the large-span latticed shell structure 3 in the unilateral jacking construction process, can keep the verticality and the support effectiveness, and is simple and effective to operate.
Claims (8)
1. A large-span net shell structure unilateral jacking safety protection device is characterized by comprising a plurality of safety joints which are sequentially connected, wherein a connecting transition pipe is inserted at the upper end of the uppermost safety joint, a supporting rib plate is arranged on the outer side surface of the connecting transition pipe, the supporting rib plate is in contact with the surface of a flange plate at the upper end of the safety joint, a semicircular groove is formed in the top of the connecting transition pipe, a connecting transverse pipe is arranged in the semicircular groove, U-shaped clamps are arranged at two ends of the connecting transverse pipe and fixed on the flange plate at the upper end of the safety joint, support rib plates are fixedly connected at two ends of the connecting transverse pipe, and one side of each support rib plate is an arc-shaped connecting edge; a pair of wedge blocks are arranged below the safety knot positioned at the lowest part, and sleepers are arranged below the wedge blocks.
2. The single-side jacking safety protection device for the large-span reticulated shell structure according to claim 1, wherein the two support rib plates are respectively located on two sides of the connecting transition pipe.
3. The single-side jacking safety protection device for the large-span reticulated shell structure according to claim 1, wherein the connecting arm of the U-shaped clamp is threaded into a bolt hole in a flange plate of the safety joint.
4. A single-side jacking safety jacking method for a large-span reticulated shell structure is characterized by comprising the following steps:
a. arranging a hinged support on the ground, splicing the latticed shell structure by taking the hinged support as a hinged point, and hinging a spherical joint at one end of the latticed shell structure with the hinged support, wherein the other end of the latticed shell structure is a free end;
b. jacking the free end of the latticed shell structure by using a jacking device, and splicing the free end of the jacked latticed shell structure to form a new free end;
c. repeating the previous step until the spliced latticed shell structure is one third of the whole latticed shell structure, the single-side jacking safety protection device of the large-span reticulated shell structure is arranged near the jacking device in the jacking process, and comprises a plurality of safety joints which are connected in sequence, the upper end of the safety joint positioned at the top is inserted with a connecting transition pipe, the outer side surface of the connecting transition pipe is provided with a supporting rib plate, the supporting rib plate is contacted with the surface of a flange plate at the upper end of the safety joint, a semicircular groove is arranged at the top of the connecting transition pipe, a connecting transverse pipe is arranged in the semicircular groove, u-shaped clamps are arranged at two ends of the connecting transverse pipe and fixed on a flange plate at the upper end of the safety joint, support rib plates are fixedly connected to two ends of the connecting transverse pipe, and one side of each support rib plate is an arc-shaped connecting edge;
d. welding two support rib plates and a connecting transverse pipe into a whole, and welding connecting edges of the support rib plates on ball joints of the grid structure;
e. inserting a connecting transition pipe at the upper end of the safety joint, placing the safety joint inserted with the connecting transition pipe below the connecting transverse pipe along with the lifting of the latticed shell structure, and connecting the safety joint, the connecting transition pipe and the connecting transverse pipe through U-shaped clamps;
f. after the safety joint is arranged on the latticed shell structure, a gap between the lower end of the safety joint and the ground is filled through the wedge-shaped block and the sleeper until the distance between the lower end of the safety joint and the ground is equal to the height of the safety joint, a new safety joint is additionally arranged between the safety joint and the ground, and the process is repeated, so that the single-side jacking safety protection device of the large-span latticed shell structure always jacks the latticed shell structure;
j. the single-side jacking safety protection device of the large-span reticulated shell structure moves outwards along with the jacking device until the construction of the whole reticulated shell structure is completed, if no obstacle exists in a construction site, a gap between the free end of the reticulated shell and the ground is filled, the jacking device and the single-side jacking safety protection device of the large-span reticulated shell structure are moved, if an obstacle exists in the construction site, a new jacking device/large-span reticulated shell structure single-side jacking safety protection device is arranged at the jacking point at the outer side of the middle position in the arrangement direction of the existing jacking device/large-span reticulated shell structure single-side jacking safety protection device, and then, sequentially transferring the existing single-side jacking safety protection device of the jacking device/large-span latticed shell structure to two sides of a new jacking device/large-span latticed shell structure from the middle part until the original single-side jacking safety protection device of the jacking device/large-span latticed shell structure is completely moved out.
5. The single-side jacking safety jacking method for the large-span latticed shell structure as claimed in claim 4, wherein in the step f, when the distance between the lower end of the safety joint and the ground is smaller than the height of one sleeper, a pair of wedge blocks are placed below the safety joint, the safety joint is kept in a jacking state through the involution of the wedge blocks, when the distance between the lower end of the safety joint and the ground is larger than the height of one sleeper, a layer of sleeper is added below the wedge blocks, the sleepers are continuously increased along with the continuous lifting of the free end of the grid structure until the lower end of the safety joint is at the height of one safety joint, the stacked wedge blocks and sleepers are replaced by the safety joint, and the safety joint is continuously added by analogy in sequence.
6. The unilateral jacking safety jacking method of the large-span latticed shell structure according to claim 4, wherein the number of the safety nodes of the unilateral jacking safety protection device of the large-span latticed shell structure is less than or equal to 5, and when the number of the safety nodes reaches 5, the position of the unilateral jacking safety protection device of the large-span latticed shell structure is moved outwards.
7. The single-side jacking safety jacking method for the large-span reticulated shell structure according to claim 4, wherein the height of the safety joint of the single-side jacking safety protection device of the large-span reticulated shell structure is consistent with the height of the standard joint of the jacking device.
8. The single-side jacking safety jacking method for the large-span latticed shell structure according to claim 4, wherein in the step f, after a new safety joint is added on the existing safety joint, the safety joint is rotated around the connecting transverse pipe, and the angle of the safety joint is adjusted to be perpendicular to the ground.
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