CN114684624A - Few-column sectional chimney-penetrating coal conveying trestle system and method - Google Patents
Few-column sectional chimney-penetrating coal conveying trestle system and method Download PDFInfo
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- CN114684624A CN114684624A CN202210318260.8A CN202210318260A CN114684624A CN 114684624 A CN114684624 A CN 114684624A CN 202210318260 A CN202210318260 A CN 202210318260A CN 114684624 A CN114684624 A CN 114684624A
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- 238000003466 welding Methods 0.000 claims description 8
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- 238000009434 installation Methods 0.000 claims description 2
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- 239000000463 material Substances 0.000 description 4
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- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
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- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G63/00—Transferring or trans-shipping at storage areas, railway yards or harbours or in opening mining cuts; Marshalling yard installations
- B65G63/04—Transferring or trans-shipping at storage areas, railway yards or harbours or in opening mining cuts; Marshalling yard installations with essentially-horizontal transit by bridges equipped with conveyors
- B65G63/047—Transferring or trans-shipping at storage areas, railway yards or harbours or in opening mining cuts; Marshalling yard installations with essentially-horizontal transit by bridges equipped with conveyors for bulk material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G41/00—Supporting frames or bases for conveyors as a whole, e.g. transportable conveyor frames
- B65G41/006—Supporting frames or bases for conveyors as a whole, e.g. transportable conveyor frames with the conveyor not adjustably mounted on the supporting frame or base
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Abstract
The invention provides a few-column sectional type chimney-penetrating coal-transporting trestle system and an arrangement method, wherein a high-end trestle landing leg of a chimney steel truss trestle is connected with a trestle support column or a building frame column, and a low-end trestle landing leg of the chimney steel truss trestle is connected with a first bracket on the outer side of the chimney outer cylinder wall through a first fixed hinged support; a high-end trestle supporting leg of the steel truss trestle in the chimney is connected with a second bracket on the inner side of the outer cylinder wall of the chimney through a first sliding support, and a low-end trestle supporting leg of the steel truss trestle in the chimney is connected with a third bracket on the inner side of the outer cylinder wall of the chimney through a second fixed hinged support; the high-end trestle landing leg of the chimney steel truss trestle is connected with a fourth trestle on the outer side of the chimney outer cylinder wall through a second sliding support, and the low-end trestle landing leg of the chimney steel truss trestle is connected with a trestle support column or a building frame column; the invention solves the problem of limited arrangement of trestle support columns, and eliminates the adverse effects of temperature deformation and thrust generated by the temperature difference between the inside and the outside of a chimney on the trestle.
Description
Technical Field
The invention relates to the technical field of structural design of coal transporting trestles, in particular to a few-column sectional chimney-penetrating coal transporting trestle system and a method.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The coal transporting trestle is widely used in coal-fired thermal power plants, is a junction for connecting a coal storage yard and a boiler coal bunker, plays an important role in conveying coal and delivering coal, directly causes paralysis of a life line once damage occurs, and causes immeasurable difficulty in rescue and relief work and post-disaster reconstruction. Along with the increasing of installed capacity of thermal power plants, influences such as coal storage modes, site limitations and the like, the application of the coal transporting trestle penetrating through the chimney is increasingly wide.
The traditional method for penetrating a chimney trestle is shown in figure 1, a hole is formed in the outer cylinder wall of the chimney, trestle support columns are arranged on two sides of the chimney, and a trestle body penetrates through the chimney. The diameter of the chimney at the trestle is about 30m, the trestle support columns stand on two sides of the chimney, the span of the chimney-penetrating trestle reaches more than 35m, the chimney-penetrating trestle belongs to a large-span trestle, the economic span of the steel truss trestle is about 25m, the unit steel consumption can be increased along with the increase of the trestle span, and the method for penetrating the chimney trestle in the prior art is very uneconomical.
The inside temperature of chimney reaches more than 100 ℃, the inside and outside difference in temperature of chimney is very big, especially chilly winter, the way of chimney landing stage is worn to the tradition can lead to in same constitutional unit, the member cooling shrinkage at both ends when middle member heaies up the expend with heat, landing stage support department temperature is flexible warp greatly, sliding support does not satisfy the slippage very easily and produces the stretch-fracture and destroy, simultaneously, the horizontal thrust that the difference in temperature arouses greatly makes landing stage support column top support take place to destroy, lead to landing stage support column to collapse even.
The trestle support column is arranged close to the chimney, so that on one hand, the trestle support column foundation collides with a chimney foundation, an underground pipe network, a pipeline and the like, and even if a combined foundation is made, the foundation is irregular in appearance due to complex and uneven stress, and certain difficulty is caused to the foundation design and construction; and the load difference of the trestle, the chimney and the adjacent building is large, the settlement difference of the trestle foundation and the adjacent foundation can cause the top end of the trestle support column to generate corresponding lateral displacement, and the longitudinal deformation caused by the settlement of the trestle foundation is very obvious to the trestle on a soft foundation. On the other hand, the trestle support column can collide with a flue support of the chimney, and the arrangement of the trestle support column can be limited by roads, buildings, equipment, underground pipe networks and foundations near the chimney.
The inventor finds that in the traditional method for penetrating the chimney trestle, the whole large-span trestle penetrates through the chimney, which causes great troubles to site hoisting, increases the danger of high-altitude operation, needs cross construction operation, increases the number of machine shifts, is restrained by the construction sequence, and greatly increases the danger sources of site construction; the 'de-industrialization' of the power plant building in the current society is a necessary trend, and the trestle bracket columns arranged on two sides of the chimney closely influence the 'de-industrialization' image of the chimney, so that the development of the 'de-industrialization' of the power plant building is limited.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a few-column sectional chimney-penetrating coal conveying trestle system and a method, trestle support columns and foundations on two sides of a chimney are cancelled, the problem that trestle support columns are limited in arrangement and large-span trestles are avoided is effectively solved, the economic and reasonable span range of steel consumption for the trestles is ensured, and the adverse effects of temperature deformation and thrust on the trestles caused by the temperature difference between the inside and the outside of the chimney are eliminated; meanwhile, the engineering quantity is greatly reduced, the excavation engineering quantity is saved, the occupied area is saved, the investment is saved, the design progress of 'removing industrialization' of a factory is promoted, and a comfortable, healthy and environment-friendly working environment is created.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a few-column sectional chimney-penetrating coal conveying trestle system in a first aspect.
A chimney fortune coal landing stage system is worn to few post sectional type, includes:
the device comprises a chimney steel truss outlet trestle, a chimney inner steel truss trestle, a chimney steel truss inlet trestle, a first bracket supporting the lower end of the chimney trestle, a second bracket supporting the high end of the chimney trestle, a third bracket supporting the lower end of the chimney trestle and a fourth bracket supporting the high end of the chimney trestle;
the lower end trestle landing leg of the chimney steel truss trestle is connected with a first bracket on the outer side of the chimney outer cylinder wall through a first fixed hinged support;
the lower end trestle landing leg of the steel truss trestle in the chimney is connected with the third trestle at the inner side of the chimney outer cylinder wall through a second fixed hinged support;
the high-end trestle support leg of the chimney steel truss trestle is connected with the fourth bracket on the outer side of the chimney outer cylinder wall through a second sliding support, and the low-end trestle support leg of the chimney steel truss trestle is connected with the trestle support column or the building frame column.
As an optional implementation manner, the outer cylinder wall of the chimney is of a reinforced concrete annular structure, and corbels made of reinforced concrete are symmetrically arranged on the inner side and the outer side of the outer cylinder wall of the chimney.
As an optional implementation manner, in the first fixed hinged support and the second fixed hinged support, a U-shaped bolt is connected with a first bracket supporting the lower end of the chimney trestle through a base plate and a trestle leg column base bottom plate, and is welded after being screwed by double nuts;
the backing plate welds after the steel truss landing stage installation finishes and dies, landing stage landing leg post and landing stage landing leg column base bottom plate full weld and be connected, landing stage landing leg column base bottom plate and the embedded steel sheet full weld of bracket top are connected, and the stiffening rib and the landing stage landing leg column base bottom plate full weld of landing stage landing leg column bottom are connected.
As an optional implementation manner, in the first sliding support and the second sliding support, an elliptical hole is formed in a bolt position of a landing leg column base bottom plate of the trestle, an elliptical hole is formed in a bolt position of a first polytetrafluoroethylene gasket, and a round hole is formed in a bolt position of a second polytetrafluoroethylene gasket;
the first polytetrafluoroethylene gasket is bonded with a column base bottom plate of a landing leg of the trestle, and the second polytetrafluoroethylene gasket is bonded with an embedded steel plate at the top of the bracket;
the end part of the embedded steel plate at the top of the bracket is connected with a second fixed steel plate.
As an optional implementation manner, the bridge deck of the chimney inlet steel truss trestle and the bridge deck of the chimney outlet steel truss trestle adopt profiled steel sheet composite floor slabs, and a bridge deck deformation joint is arranged at the position of the chimney inlet and the chimney outlet.
As an optional implementation manner, the bridge deck of the chimney-entering steel truss trestle and the bridge deck of the chimney-exiting steel truss trestle are washed by water, water retaining edges are arranged on two sides of the bridge deck, and deformation joints are arranged on the water retaining edges.
As an optional implementation manner, sliding joints are arranged on bridge deck beams and bridge deck longitudinal beams of the chimney inlet steel truss trestle and the chimney outlet steel truss trestle.
As an optional implementation mode, in the sliding joint, the contact positions of the vertical stiffening ribs, the horizontal stiffening ribs and the bridge deck beam steel member are all connected in a full-welding mode, the third polytetrafluoroethylene gasket is bonded with the lower flange of the bridge deck longitudinal beam, the fourth polytetrafluoroethylene gasket is bonded with the horizontal stiffening plate, the third fixing steel plate is arranged at the end parts of the third polytetrafluoroethylene gasket and the fourth polytetrafluoroethylene gasket, and the third fixing steel plate is welded with the horizontal stiffening plate and is reserved with the lower flange of the bridge deck longitudinal beam at a certain distance.
The invention provides a method for arranging a small-column sectional chimney-penetrating coal conveying trestle.
A method for arranging a small-column sectional chimney-penetrating coal conveying trestle comprises the following steps:
connecting a high-end trestle support leg of the chimney steel truss trestle with a trestle support column or a building frame column, and connecting a low-end trestle support leg of the chimney steel truss trestle with a first bracket on the outer side of the chimney outer cylinder wall through a first fixed hinge support;
connecting a high-end trestle landing leg of the steel truss trestle in the chimney with a second bracket on the inner side of the outer cylinder wall of the chimney through a first sliding support, and connecting a low-end trestle landing leg of the steel truss trestle in the chimney with a third bracket on the inner side of the outer cylinder wall of the chimney through a second fixed hinged support;
and connecting the high-end trestle support leg of the chimney steel truss trestle with a fourth bracket on the outer side of the chimney outer cylinder wall through a second sliding support, and connecting the low-end trestle support leg of the chimney steel truss trestle with trestle support columns or building frame columns.
As an optional implementation manner, the sliding distance of the sliding joints of the deck cross beam and the deck longitudinal beam of the chimney-entering steel truss trestle and the chimney-exiting steel truss trestle is equal to the sliding distance of the second sliding support and the second sliding support.
Compared with the prior art, the invention has the beneficial effects that:
(1) the few-column sectional chimney-penetrating coal-transporting trestle system and the arrangement method of the few-column sectional chimney-penetrating coal-transporting trestle system cancel trestle support columns on two sides of the chimney, so that trestle support column foundations are cancelled, the consumption of reinforcing steel bars and concrete is greatly reduced, the excavation engineering quantity is saved, the occupied land is saved, the construction progress is accelerated, and the engineering cost is saved.
(2) The few-column sectional chimney-penetrating coal-transporting trestle system and the arrangement method ensure the economic span of the trestle, avoid the occurrence of large-span trestles, are most economical in steel consumption and more sufficient in stress of the rod piece, thereby saving the consumption of steel and ensuring more reasonable structural stress.
(3) According to the less-column sectional chimney-penetrating coal transporting trestle system and the arrangement method, the sectional trestle is implemented according to the temperature difference, the adverse effects of temperature deformation and thrust on the structure caused by the temperature action are eliminated, the less-column sectional chimney-penetrating coal transporting trestle system has higher overall rigidity and strength and definite force transmission, and simultaneously has good stress performance and ensures the safety and the reliability of the structure.
(4) The few-column sectional chimney-penetrating coal conveying trestle system and the arrangement method of the few-column sectional chimney-penetrating coal conveying trestle system cancel trestle support columns and foundations, and are very practical under the condition that the trestle support columns are limited by flue supports, buildings and equipment near a chimney and the existing underground pipe network, pipe ditches and foundations in reconstruction, extension and new construction projects.
(5) According to the less-column sectional chimney-penetrating coal conveying trestle system and the arrangement method, the trestle support column foundation is cancelled, so that the pipeline laying and drainage at the bottom of the foundation can be realized, the underground space is reasonably utilized, and the engineering land is greatly saved.
(6) The less-column sectional chimney-penetrating coal conveying trestle system and the arrangement method avoid collision of two adjacent foundations and generation of irregular and complex-stressed foundations, ensure safe construction of a project and greatly save the construction cost of the project.
(7) According to the few-column sectional chimney-penetrating coal transporting trestle system and the arrangement method, the conventional trestle is segmented, the field hoisting is convenient, the overhead operation is reduced, the restriction of the construction sequence is avoided, the construction is simple and rapid, the construction progress is accelerated, and the construction safety is ensured.
(8) The less-column sectional chimney-penetrating coal-transporting trestle system and the arrangement method of the less-column sectional chimney-penetrating coal-transporting trestle system cancel trestle support columns near a chimney, accord with the design concept of 'industrial removal' in a factory, and are beneficial to creating comfortable, healthy, green and environment-friendly working environment.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of a chimney-through coal transporting trestle provided in the background art.
Fig. 2 is a schematic structural diagram of a small-column sectional chimney-through coal transporting trestle system provided in embodiment 1 of the present invention.
Fig. 3 is a first schematic view of a corbel provided in embodiment 1 of the present invention.
Fig. 4 is a sectional view a-a of fig. 3 according to embodiment 1 of the present invention.
Fig. 5 is a schematic view of a bracket provided in embodiment 1 of the present invention.
Fig. 6 is a sectional view B-B in fig. 5 according to embodiment 1 of the present invention.
Fig. 7 is a schematic view of each through hole provided in embodiment 1 of the present invention.
Fig. 8 is a schematic diagram of a deck of a coal-transporting trestle provided in embodiment 1 of the present invention.
FIG. 9 is a schematic representation of a bridge deck deformation joint provided in example 1 of the present invention.
Fig. 10 is a schematic diagram of a deformation joint of a water retaining edge provided in embodiment 1 of the present invention.
Fig. 11 is a schematic view of a landing stage bridge deck beam provided in embodiment 1 of the present invention.
Fig. 12 is a schematic diagram of a sliding node according to embodiment 1 of the present invention.
The chimney steel truss trestle comprises 1-a chimney steel truss trestle, 2-a chimney inner steel truss trestle, 3-a chimney steel truss trestle, 4-a chimney outer cylinder wall, 5-a first bracket, 6-a second bracket, 7-a third bracket, 8-a fourth bracket and 9-a first elliptical hole; 10-a second elliptical hole; 11-a first circular aperture; 12-type bolts, 13-embedded steel plate embedded parts at the tops of the brackets, 14-a bottom plate of a leg column foot of the trestle, 15-a leg column of the trestle, 16-a first polytetrafluoroethylene gasket, 17-a second polytetrafluoroethylene gasket, 18-a first fixed steel plate, 19-a base plate, 20-a stiffening rib, 21-a second fixed steel plate, 22-aluminum alloy or stainless steel part, 23-aluminum alloy or stainless steel part, 24-steel plate, 25-ethylene propylene diene monomer waterproof coiled material, 26-glass wool felt, 27-fine stone concrete filling, 28-a waterproof coiled material, 29-a galvanized steel plate, 30-a chimney steel bar, 31-a lower-end bridge deck beam of a smoke-outlet steel truss trestle, a higher-end bridge deck beam of a 32-chimney inner steel truss, 33-a bridge deck longitudinal beam, 34-a lower-end beam of the chimney inner steel truss trestle, a reinforcing steel bar, a reinforcing, 35-high-end bridge deck cross beam, 36-bridge deck cross beam, 37-bridge deck longitudinal beam, 38-vertical stiffening plate, 39-horizontal stiffening plate, 40-third polytetrafluoroethylene gasket, 41-fourth polytetrafluoroethylene gasket and 42-third fixed steel plate of the steel truss trestle in the chimney.
Detailed Description
The invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only terms of relationships determined for convenience of describing structural relationships of the parts or elements of the present invention, and are not intended to refer to any parts or elements of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be determined according to specific situations by persons skilled in the relevant scientific or technical field, and are not to be construed as limiting the present invention.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example 1:
as shown in fig. 2, embodiment 1 of the present invention provides a small-column sectional chimney-through coal transporting trestle system, including:
the device comprises a chimney exit steel truss trestle 1, a chimney inner steel truss trestle 2, a chimney entrance steel truss trestle 3, a first bracket 5 supporting the low end of the chimney exit trestle, a second bracket 6 supporting the high end of the chimney inner trestle, a third bracket 7 supporting the low end of the chimney inner trestle and a fourth bracket 8 supporting the high end of the chimney entrance trestle;
the high-end trestle landing leg of the chimney steel truss trestle 1 is connected with a trestle support column or a building frame column, and the low-end trestle landing leg of the chimney steel truss trestle 1 is connected with a first bracket 5 on the outer side of the chimney outer cylinder wall 4 through a first fixed hinged support;
a high-end trestle landing leg of the steel truss trestle 2 in the chimney is connected with a second bracket 6 on the inner side of the chimney outer cylinder wall 4 through a first sliding support, and a low-end trestle landing leg of the steel truss trestle 2 in the chimney is connected with a third bracket 7 on the inner side of the chimney outer cylinder wall 4 through a second fixed hinged support;
and the high-end trestle landing leg of the chimney entering steel truss trestle 3 is connected with the fourth corbel 8 on the outer side of the chimney outer cylinder wall 4 through a second sliding support, and the low-end trestle landing leg of the chimney entering steel truss trestle 3 is connected with trestle support columns or building frame columns.
As shown in fig. 3 and 4, includes: the support structure comprises a first bracket 5 for supporting the lower end of a chimney trestle, a second bracket 6 for supporting the high end of the trestle in the chimney, an outer chimney wall 4, a U-shaped bolt 12, a bracket top embedded steel plate embedded part 13, a trestle leg column foot bottom plate 14, a trestle leg column 15, a first polytetrafluoroethylene gasket 16, a second polytetrafluoroethylene gasket 17, a first fixed steel plate 18, a backing plate 19, a stiffening rib 20 and a second fixed steel plate 21.
The bracket upper column foot supporting the lower end of the chimney trestle is connected into a fixed hinged support, the U-shaped bolt 12 adopts double nuts, is connected with the first bracket 5 supporting the lower end of the chimney trestle through a backing plate 19 and a trestle leg column foot bottom plate 14, and is welded after the double nuts are screwed; the backing plate 19 is welded after the steel truss trestle is installed; the landing stage landing leg column 15 is in full-welding connection with the landing stage landing leg column base bottom plate 14; a trestle landing leg column base bottom plate 14 is in full-welding connection with a bracket top embedded steel plate embedded part 13; the stiffening rib 20 at the bottom of the landing leg column 15 is in full-welding connection with the landing leg column base bottom plate 14.
The high-end bracket upper column base of landing stage is connected for sliding support in the supporting chimney, U type bolt 12 initial positioning is placed in the middle, and two screw caps are reverse to be screwed up, and are 1mm with the bottom plate gap.
The first polytetrafluoroethylene gasket 16 is bonded with a trestle landing leg column base bottom plate 14, the second polytetrafluoroethylene gasket 17 is bonded with a corbel top embedded steel plate embedded part 13, in order to prevent the polytetrafluoroethylene gaskets 16 and 17 from being separated when sliding, the first fixed steel plate 18 is welded and connected with the end parts of the first polytetrafluoroethylene gasket 16 and the trestle landing leg column base bottom plate 14, a reserved gap between 18 and 17 is noticed, and normal sliding between the polytetrafluoroethylene gaskets is guaranteed; and the second polytetrafluoroethylene gasket 17 and the end part of the embedded steel plate embedded part 13 at the top of the bracket are welded and connected with a second fixed steel plate 21.
As shown in fig. 5 and 6, includes: the support chimney comprises a third bracket 7 for supporting the lower end of a trestle in a chimney, a fourth bracket 7 for supporting the high end of the trestle in the chimney, an outer chimney wall 4, a U-shaped bolt 12, a bracket top embedded steel plate embedded part 13, a trestle leg column base bottom plate 14, a trestle leg column 15, a first polytetrafluoroethylene gasket 16, a second polytetrafluoroethylene gasket 17, a first fixed steel plate 18, a base plate 19, a stiffening rib 20 and a second fixed steel plate 21.
The bracket upper column foot supporting the lower end of the trestle in the chimney is connected into a fixed hinged support, the U-shaped bolt 12 adopts double nuts, is connected with the third bracket 7 supporting the lower end of the trestle out of the chimney through a backing plate 19 and a trestle leg column foot bottom plate 14, and is welded after the double nuts are screwed;
the backing plate 19 is welded after the steel truss trestle is installed; the landing stage landing leg column 15 is in full-welding connection with the landing stage landing leg column base bottom plate 14; a trestle landing leg column base bottom plate 14 is in full-welding connection with a bracket top embedded steel plate embedded part 13; the stiffening rib 20 at the bottom of the landing leg column 15 is in full-welding connection with the landing leg column base bottom plate 14.
The bracket upper column foot supporting the high end of the chimney trestle is connected with a sliding support, the U-shaped bolt is initially positioned in the middle, the double nuts are reversely screwed, and the gap between the U-shaped bolt and the bottom plate is 1 mm; as shown in fig. 7, the landing leg column base bottom plate 14 of the trestle is provided with a first elliptical hole 9 at the bolt position, the size of the first elliptical hole 9 is determined according to the calculated displacement under the temperature load, a first polytetrafluoroethylene gasket 16 is provided with a second elliptical hole 10 at the bolt position, and a second polytetrafluoroethylene gasket 17 is provided with a first round hole 11 at the bolt position, wherein the diameter is generally the bolt diameter plus 2 mm.
The first polytetrafluoroethylene gasket 16 is bonded with the trestle landing leg column base bottom plate 14, the second polytetrafluoroethylene gasket 17 is bonded with the embedded steel plate embedded part 13 at the top of the bracket, in order to prevent the first polytetrafluoroethylene gasket 16 and the second polytetrafluoroethylene gasket 17 from being separated when sliding, the first polytetrafluoroethylene gasket 16 and the end part of the trestle landing leg column base bottom plate 14 are welded and connected with a first fixed steel plate 18, a gap is reserved between the first fixed steel plate 18 and the second polytetrafluoroethylene gasket 17, and normal sliding between the polytetrafluoroethylene gaskets is ensured; and a second fixed steel plate 21 is welded and connected at the end parts of the second polytetrafluoroethylene gasket 17 and the embedded steel plate embedded part 13 at the top of the bracket.
As shown in fig. 8, the bridge floor of the coal transporting trestle is a profiled steel sheet composite floor slab, in order to release temperature deformation, bridge floor deformation joints are arranged at the positions of the inlet chimney and the outlet chimney, and the method for the bridge floor deformation joints is shown in fig. 9; the bridge deck of the coal-transporting trestle is flushed by water, water retaining edges are arranged on two sides of the bridge deck, and the method for the deformation joint of the water retaining edges is shown in figure 10.
As shown in fig. 9, the deck deformation joint comprises: an aluminium alloy or stainless steel piece 22, an aluminium alloy or stainless steel piece 23, a 6mm thick steel plate 24, an ethylene propylene diene monomer waterproof roll 25, a glass wool felt 26 and a fine stone concrete filling 27.
As shown in fig. 10, the deformation joint of the water retaining rim comprises: waterproof coiled material 28, galvanized steel plate 29 with the thickness of 8mm, two reinforcing steel bars 30 with the diameter of 8mm, ethylene propylene diene monomer waterproof coiled material, glass wool felt and fine aggregate concrete filling; waterproofing membrane 28 sets up with the waterproofing membrane of bridge floor movement joint is whole, and 8mm thick galvanized steel sheet 29 is with high along the same height with manger plate, and two 8 mm's reinforcing bar 30 are buckled, are welded with waterproofing membrane 28.
As shown in fig. 11, 31 is a lower-end deck beam of the chimney steel truss trestle, 32 is a higher-end deck beam of the chimney inner steel truss trestle, 33 is a deck longitudinal beam, 34 is a lower-end deck beam of the chimney inner steel truss trestle, and 35 is a higher-end deck beam of the chimney inner steel truss trestle.
As the chimney outer cylinder wall is circular, the lower end bridge deck beam 31 of the chimney steel truss trestle and the higher end bridge deck beam 35 of the chimney inner steel truss trestle avoid touching the chimney outer cylinder wall, and the distance between the lower end bridge deck beam 31 of the chimney steel truss trestle and the higher end bridge deck beam 32 of the chimney inner steel truss trestle and the distance between the lower end bridge deck beam 34 of the chimney inner steel truss trestle and the higher end bridge deck beam 35 of the chimney inner steel truss trestle are both larger, the bridge deck longitudinal beam at the position ensures the laying of the bridge deck, and also ensures the sliding displacement which is consistent with the position of the sliding support and is coordinated with the deformation. The bridge deck longitudinal beams 33 and the high-end bridge deck cross beams 32 of the steel truss trestle in the chimney are provided with sliding nodes, the bridge deck longitudinal beams 33 and the high-end bridge deck cross beams 35 of the steel truss trestle in the chimney are provided with sliding nodes, and the sliding nodes are shown in the figure 12.
As shown in fig. 12, 36 is a bridge deck beam, 37 is a bridge deck longitudinal beam, 38 is a vertical stiffening plate, 39 is a horizontal stiffening plate, 40 is a third teflon gasket, 41 is a fourth teflon gasket, and 42 is a third fixed steel plate.
The contact positions of the vertical stiffening plates 38, the horizontal stiffening plates 39 and the bridge deck cross beam 36 are all in full-welded connection, the third polytetrafluoroethylene gasket 40 is bonded with the lower flange of the bridge deck longitudinal beam 37, the fourth polytetrafluoroethylene gasket 41 is bonded with the horizontal stiffening plates 39, in order to prevent slipping and falling, a third fixed steel plate 42 is arranged at the end parts of the third polytetrafluoroethylene gasket 40 and the fourth polytetrafluoroethylene gasket 41, the third fixed steel plate 42 is welded with the horizontal stiffening plates 39 and is reserved with the lower flange of the bridge deck longitudinal beam 37 for a certain distance, smooth sliding between the third polytetrafluoroethylene gasket 40 and the fourth polytetrafluoroethylene gasket 41 is guaranteed, and the sliding quantity distance L shown in the drawing needs to be consistent with the sliding quantities of the first sliding support and the second sliding support.
The invention effectively solves the adverse effects of temperature deformation and thrust on the trestle caused by the temperature difference between the inside and the outside of the chimney, has good stress performance, ensures the safety and the reliability of the structure, also ensures the economic span of the trestle, avoids the generation of a large-span trestle, reduces overhead operation during construction, reduces construction risks, reduces trestle support columns, effectively avoids the problem of limited trestle support column arrangement, ensures the engineering safety, greatly reduces the consumption of steel, concrete and reinforcing steel bars, saves the excavation engineering quantity, avoids water and soil loss, saves occupied land and saves investment. The invention has high requirement on 'de-industrialization', and is very practical under the conditions of existing pipelines, channels, foundations and the like of roads, buildings and equipment around the chimney and the underground.
Example 2:
the embodiment 2 of the invention provides a method for arranging a few-column sectional type chimney-penetrating coal conveying trestle, which comprises the following steps:
connecting a high-end trestle support leg of the chimney steel truss trestle with a trestle support column or a building frame column, and connecting a low-end trestle support leg of the chimney steel truss trestle with a first bracket on the outer side of the chimney outer cylinder wall through a first fixed hinge support;
connecting a high-end trestle landing leg of the steel truss trestle in the chimney with a second bracket on the inner side of the outer cylinder wall of the chimney through a first sliding support, and connecting a low-end trestle landing leg of the steel truss trestle in the chimney with a third bracket on the inner side of the outer cylinder wall of the chimney through a second fixed hinged support;
and connecting the high-end trestle support leg of the chimney steel truss trestle with a fourth bracket on the outer side of the chimney outer cylinder wall through a second sliding support, and connecting the low-end trestle support leg of the chimney steel truss trestle with trestle support columns or building frame columns.
The specific structural design of the less-column sectional chimney-penetrating coal conveying trestle is shown in example 1, and details are not repeated here.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a chimney fortune coal landing stage system is worn to few post sectional type which characterized in that:
the method comprises the following steps:
the device comprises a chimney steel truss outlet trestle, a chimney inner steel truss trestle, a chimney steel truss inlet trestle, a first bracket supporting the lower end of the chimney trestle, a second bracket supporting the high end of the chimney trestle, a third bracket supporting the lower end of the chimney trestle and a fourth bracket supporting the high end of the chimney trestle;
the lower end trestle landing leg of the chimney steel truss trestle is connected with a first bracket on the outer side of the chimney outer cylinder wall through a first fixed hinged support;
the lower end trestle landing leg of the steel truss trestle in the chimney is connected with the third trestle at the inner side of the chimney outer cylinder wall through a second fixed hinged support;
the high-end trestle support leg of the chimney steel truss trestle is connected with the fourth bracket on the outer side of the chimney outer cylinder wall through a second sliding support, and the low-end trestle support leg of the chimney steel truss trestle is connected with the trestle support column or the building frame column.
2. The few-column segmented chimney-through coal handling trestle system of claim 1, wherein:
the outer cylinder wall of the chimney is of a reinforced concrete annular structure, and brackets of reinforced concrete are symmetrically arranged on the inner side and the outer side of the outer cylinder wall of the chimney.
3. The few-column segmented chimney-through coal handling trestle system of claim 1, wherein:
in the first fixed hinged support and the second fixed hinged support, a U-shaped bolt is connected with a first bracket supporting the lower end of the chimney trestle through a base plate and a trestle leg column foot bottom plate, and is welded after being screwed up by double nuts;
the backing plate welds after the steel truss landing stage installation finishes, and landing stage landing leg post is connected with landing stage landing leg column base plate full weld, and landing stage landing leg column base plate is connected with the embedded steel sheet full weld in bracket top, and the stiffening rib and the landing stage landing leg column base plate full weld of landing stage landing leg column bottom are connected.
4. The few-column segmented chimney-through coal handling trestle system of claim 1, wherein:
in the first sliding support and the second sliding support, an elliptical hole is formed in a bolt position of a landing leg column base bottom plate of the trestle, an elliptical hole is formed in a bolt position of a first polytetrafluoroethylene gasket, and a circular hole is formed in a bolt position of a second polytetrafluoroethylene gasket;
the first polytetrafluoroethylene gasket is bonded with a leg column base bottom plate of the landing stage, and the second polytetrafluoroethylene gasket is bonded with an embedded steel plate at the top of the bracket;
the end part of the embedded steel plate at the top of the bracket is connected with a second fixed steel plate.
5. The few-column segmented chimney-through coal handling trestle system of claim 1, wherein:
the bridge deck of the chimney entering steel truss trestle and the chimney exiting steel truss trestle adopts profiled steel sheet combined floor slabs, and bridge deck deformation joints are arranged at positions of entering and exiting the chimney.
6. The few-column segmented chimney-through coal handling trestle system of claim 1, wherein:
the bridge deck of the chimney inlet steel truss trestle and the bridge deck of the chimney outlet steel truss trestle are washed by water, water retaining edges are arranged on two sides of the bridge deck, and deformation joints are arranged on the water retaining edges.
7. The few-column segmented chimney-through coal handling trestle system of claim 1, wherein:
sliding joints are arranged on bridge deck cross beams and bridge deck longitudinal beams of the chimney inlet steel truss trestle and the chimney outlet steel truss trestle.
8. The few-column segmented chimney-through coal handling trestle system of claim 1, wherein:
in the sliding joint, the contact positions of the vertical stiffening ribs, the horizontal stiffening ribs and the bridge deck beam steel member are all connected in a full-welding mode, the third polytetrafluoroethylene gasket is bonded with the lower flange of the bridge deck longitudinal beam, the fourth polytetrafluoroethylene gasket is bonded with the horizontal stiffening plate, the third fixing steel plate is arranged at the end portions of the third polytetrafluoroethylene gasket and the fourth polytetrafluoroethylene gasket, and the third fixing steel plate is welded with the horizontal stiffening plate and is reserved with the lower flange of the bridge deck longitudinal beam at a certain distance.
9. A method for arranging a small-column sectional chimney-penetrating coal conveying trestle is characterized by comprising the following steps:
the method comprises the following steps:
connecting a high-end trestle support leg of the chimney steel truss trestle with a trestle support column or a building frame column, and connecting a low-end trestle support leg of the chimney steel truss trestle with a first bracket on the outer side of the chimney outer cylinder wall through a first fixed hinge support;
connecting a high-end trestle supporting leg of the steel truss trestle in the chimney with a second bracket on the inner side of the outer cylinder wall of the chimney through a first sliding support, and connecting a low-end trestle supporting leg of the steel truss trestle in the chimney with a third bracket on the inner side of the outer cylinder wall of the chimney through a second fixed hinged support;
and connecting the high-end trestle support leg of the chimney steel truss trestle with a fourth bracket on the outer side of the chimney outer cylinder wall through a second sliding support, and connecting the low-end trestle support leg of the chimney steel truss trestle with trestle support columns or building frame columns.
10. The method of arranging the small-column staged chimney-through coal handling trestle of claim 9, wherein:
the sliding distance of the sliding nodes of the bridge deck cross beam and the bridge deck longitudinal beam of the chimney entering steel truss trestle and the chimney exiting steel truss trestle is equal to the sliding distance of the second sliding support and the second sliding support.
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| CN202210318260.8A CN114684624B (en) | 2022-03-29 | 2022-03-29 | Few-column sectional type chimney-penetrating coal conveying stack bridge system and method |
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