CN114684624B - Few-column sectional type chimney-penetrating coal conveying stack bridge system and method - Google Patents
Few-column sectional type chimney-penetrating coal conveying stack bridge system and method Download PDFInfo
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- CN114684624B CN114684624B CN202210318260.8A CN202210318260A CN114684624B CN 114684624 B CN114684624 B CN 114684624B CN 202210318260 A CN202210318260 A CN 202210318260A CN 114684624 B CN114684624 B CN 114684624B
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- landing leg
- column
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- 239000003245 coal Substances 0.000 title claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 144
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- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
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- 239000002131 composite material Substances 0.000 claims description 3
- 210000003141 lower extremity Anatomy 0.000 claims 2
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- 230000000903 blocking effect Effects 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 229920002943 EPDM rubber Polymers 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000008397 galvanized steel Substances 0.000 description 3
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- 230000004048 modification Effects 0.000 description 2
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Classifications
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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
Abstract
The invention provides a few-column sectional type through-chimney coal-conveying stack bridge system and an arrangement method, wherein a high-end stack bridge support leg of a steel truss stack bridge of a chimney is connected with a stack bridge support column or a building frame column, and a low-end stack bridge support leg of the steel truss stack bridge of the chimney is connected with a first bracket on the outer side of the outer cylinder wall of the chimney through a first fixed hinge support; the high-end landing leg of the inner steel truss landing leg of the chimney is connected with the second bracket on the inner side of the outer barrel wall of the chimney through a first sliding support, and the low-end landing leg of the inner steel truss landing leg of the chimney is connected with the third bracket on the inner side of the outer barrel wall of the chimney through a second fixed hinge support; the high-end landing leg of the chimney entering steel truss landing stage is connected with a fourth bracket outside the outer cylinder wall of the chimney through a second sliding support, and the low-end landing leg of the chimney entering steel truss landing stage is connected with a landing stage support column or a building frame column; the invention solves the problem that the setting of the trestle support column is limited, and eliminates the adverse effect of temperature deformation and thrust on the trestle caused by the temperature difference inside and outside the chimney.
Description
Technical Field
The invention relates to the technical field of coal conveying stack bridge structural design, in particular to a few-column sectional type chimney-penetrating coal conveying stack bridge system and method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The coal transporting bridge is widely used in coal-fired thermal power plants, is a junction for connecting a coal storage yard and a boiler coal bin, plays an important role in coal transportation, and can directly lead to paralysis of a life line once being destroyed, thereby causing immeasurable difficulties for rescue and relief work and reconstruction after the disaster. Along with the continuous increase of the installed capacity of the thermal power plant, the coal storage mode, the site limitation and the like affect the coal transportation stack bridge penetrating through the chimney, and the application of the coal transportation stack bridge is wider.
The conventional method for penetrating through the chimney trestle is shown in fig. 1, holes are formed in the outer wall of the chimney, trestle support columns are arranged on two sides of the chimney, and the trestle body penetrates through the chimney. The diameter of the chimney at the trestle is about 30m, the trestle support posts are erected on two sides of the chimney, the span of the chimney-penetrating trestle reaches more than 35m, the chimney belongs to a large-span trestle, the economic span of a steel truss trestle is about 25m, the unit steel consumption can be increased along with the increase of the trestle span, and the traditional chimney-penetrating trestle is quite uneconomical.
The internal temperature of the chimney reaches more than 100 ℃, the temperature difference between the inside and the outside of the chimney is very large, especially in cold winter, the traditional method of penetrating through the chimney trestle can lead to the temperature reduction and cold shrinkage of the rods at the two ends when the middle rod piece is heated and thermally expanded in the same structural unit, the temperature expansion and contraction deformation of the trestle support seat is large, the sliding support seat is easy to break due to the fact that the sliding quantity is not satisfied, and meanwhile, the support seat at the top of the trestle support column is broken due to the horizontal thrust caused by the large temperature difference, and even the trestle support column collapses.
The trestle support column is arranged close to the chimney, so that on one hand, a trestle support column foundation collides with the chimney foundation, the underground pipe network, the pipeline and the like, and even if a combined foundation is made, the foundation is complex and uneven in stress, so that the foundation is irregular in appearance, and certain difficulty is caused to foundation design and construction; and the load difference between the trestle, the chimney and the adjacent buildings is large, the sedimentation difference between the trestle foundation and the adjacent foundation can cause corresponding lateral displacement at the top end of the trestle support column, and the longitudinal deformation caused by the sedimentation of the trestle foundation is quite remarkable for the trestle on the soft foundation. On the other hand, the trestle support column can collide with a flue support of a chimney, and the setting of the trestle support column can be limited by roads, buildings, equipment, underground pipe networks and foundations near the chimney.
The inventor finds that the traditional method of penetrating through the chimney trestle causes great trouble to the field hoisting when the whole section of the large-span trestle penetrates through the chimney, increases the danger of overhead operation, needs cross construction operation, increases the number of machine shifts, is limited by the construction sequence, and greatly increases the danger source of field construction; the industrial removal of the power plant building in the current society is a necessary trend, and the bracket columns of the trestle, which are close to the two sides of the chimney, seriously influence the industrial removal image of the chimney, and limit the development of the industrial removal of the power plant building.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a few-column sectional type through-chimney coal-conveying stack bridge system and a method, which cancel the support columns and the foundations of the stacks at two sides of the chimney, effectively solve the problems of limited support column arrangement of the stacks and the avoidance of the generation of large-span stacks, ensure the economic and reasonable span range of the steel consumption of the stacks, and eliminate the adverse effect of temperature deformation and thrust generated by the temperature difference inside and outside the chimney on the stacks; 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 'going to industrialization' of a factory is promoted, and a comfortable, healthy and environment-friendly working environment is created.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a few-column sectional type through-chimney coal-conveying stack bridge system.
A few-column sectional through-chimney coal-handling stack bridge system, comprising:
the system comprises a chimney-out steel truss trestle, a chimney-in steel truss trestle, a first bracket supporting the low end of the chimney-out trestle, a second bracket supporting the high end of the chimney-in trestle, a third bracket supporting the low end of the chimney-in trestle and a fourth bracket supporting the high end of the chimney-in trestle;
the high-end landing leg of the steel truss landing stage of the chimney is connected with a landing stage support column or a building frame column, and the low-end landing leg of the steel truss landing stage of the chimney is connected with a first bracket on the outer side of the outer cylinder wall of the chimney through a first fixed hinge support;
the high-end landing leg of the inner steel truss landing leg of the chimney is connected with the second bracket on the inner side of the outer barrel wall of the chimney through a first sliding support, and the low-end landing leg of the inner steel truss landing leg of the chimney is connected with the third bracket on the inner side of the outer barrel wall of the chimney through a second fixed hinge support;
the high-end landing leg of the chimney entering steel truss landing stage is connected with a fourth bracket outside the outer cylinder wall of the chimney through a second sliding support, and the low-end landing leg of the chimney entering steel truss landing stage is connected with a landing stage support column or a building frame column.
As an alternative implementation manner, the wall of the chimney outer cylinder 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 wall of the chimney outer cylinder.
As an optional implementation manner, in the first fixed hinge support and the second fixed hinge support, the 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 by adopting double nuts;
the backing plate is welded after the steel truss trestle is installed, the trestle leg post is connected with the trestle leg post foot bottom plate in a full-welded mode, the bottom plate of the landing stage landing leg column foot is connected with the embedded steel plate part at the top of the bracket in a full-welded mode, and the stiffening ribs at the bottom of the landing stage landing leg column are connected with the bottom plate of the landing stage landing leg column foot in a full-welded mode.
As an optional implementation manner, in the first sliding support and the second sliding support, elliptical holes are formed in the column foot bottom plate of the landing stage landing leg at the positions of the bolts, elliptical holes are formed in the first polytetrafluoroethylene gaskets at the positions of the bolts, and circular holes are formed in the second polytetrafluoroethylene gaskets at the positions of the bolts;
the first polytetrafluoroethylene gasket is bonded with the column foot bottom plate of the landing stage landing leg, and the second polytetrafluoroethylene gasket is bonded with the embedded steel plate part at the top of the bracket;
the first polytetrafluoroethylene gasket and the landing stage landing leg column foot bottom plate end connection first fixed steel plate reserve the gap between first fixed steel plate and the second polytetrafluoroethylene gasket, and the end connection second fixed steel plate of embedded part at second polytetrafluoroethylene gasket and bracket top.
As an alternative implementation mode, the bridge decks of the chimney entering steel truss trestle and the chimney exiting steel truss trestle adopt profiled steel sheet composite floor slabs, and bridge deck deformation joints are arranged at positions of the chimney entering and exiting.
As an alternative implementation mode, the bridge decks of the chimney inlet steel truss trestle and 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.
As an alternative implementation manner, the bridge deck beam and the bridge deck longitudinal beam of the chimney inlet steel truss trestle and the chimney outlet steel truss trestle are provided with sliding joints.
As an optional implementation manner, in the sliding joint, the vertical stiffening rib, the horizontal stiffening rib and the bridge deck beam steel member contact part are all in full-welded connection, 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 fixed steel plate is arranged at the end parts of the third polytetrafluoroethylene gasket and the fourth polytetrafluoroethylene gasket, and the third fixed steel plate is welded with the horizontal stiffening plate and is reserved with the lower flange of the bridge deck longitudinal beam for a certain distance.
The second aspect of the invention provides a method for arranging a few-column sectional type chimney-penetrating coal transporting trestle.
A method for arranging a few-column sectional type chimney-penetrating coal transporting trestle comprises the following steps:
connecting the high-end landing leg of the steel truss landing stage of the chimney with a landing stage support column or a building frame column, and connecting the low-end landing leg of the steel truss landing stage of the chimney with a first bracket on the outer side of the outer cylinder wall of the chimney through a first fixed hinge support;
connecting the high-end landing leg of the inner steel truss landing leg of the chimney with the second bracket on the inner side of the outer barrel wall of the chimney through a first sliding support, and connecting the low-end landing leg of the inner steel truss landing leg of the chimney with the third bracket on the inner side of the outer barrel wall of the chimney through a second fixed hinge support;
and connecting the high-end landing leg of the chimney steel truss landing leg with a fourth bracket outside the outer cylinder wall of the chimney through a second sliding support, and connecting the low-end landing leg of the chimney steel truss landing leg with a landing leg support column or a building frame column.
As an alternative implementation manner, the sliding distance of the sliding joints of the bridge deck beam and the bridge deck longitudinal beam of the chimney inlet steel truss trestle and the chimney outlet 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) According to the few-column sectional type through-chimney coal-conveying stack bridge system and the arrangement method, the stack bridge support columns on two sides of the chimney are omitted, so that the stack bridge support column foundation is omitted, the consumption of steel bars and concrete is greatly reduced, the excavation engineering amount is saved, the occupied area is saved, the construction progress is accelerated, and the engineering cost is saved.
(2) The few-column sectional type chimney-penetrating coal-conveying stack bridge system and the arrangement method ensure the economic span of the stack bridge, avoid the occurrence of the large-span stack bridge, have the most economical steel consumption and more sufficient stress of the rod pieces, thereby saving the consumption of steel materials and ensuring more reasonable structural stress.
(3) According to the few-column sectional type through-chimney coal-conveying stack bridge system and the arrangement method, sectional stack bridges are implemented according to temperature differences, adverse effects of temperature deformation and thrust caused by temperature effects on a structure are eliminated, the system has high overall rigidity and strength, clear force transmission, good stress performance and safety and reliability of the structure are guaranteed.
(4) The few-column sectional type through-chimney coal-conveying stack bridge system and the arrangement method thereof cancel the support columns and the foundations of the stack bridge, and are very practical under the condition that the support columns of the stack bridge are limited by flue supports, buildings and equipment near a chimney and the existing underground pipe networks, pipe ditches and foundations in reconstruction, extension and new construction.
(5) According to the few-column sectional type through-chimney coal-conveying stack bridge system and the arrangement method, the stack bridge support column foundation is omitted, laying of the foundation bottom pipeline and drainage can be achieved, underground space is reasonably utilized, and engineering land is greatly saved.
(6) The few-column sectional type through-chimney coal-carrying stack bridge system and the arrangement method thereof avoid collision of two adjacent foundations and generate irregular and stressed complicated foundations, ensure the safe construction of engineering and greatly save the construction cost.
(7) The few-column sectional type chimney-penetrating coal-conveying stack bridge system and the arrangement method thereof have the advantages that the sectional conventional stack bridge is convenient to hoist on site, overhead operation is reduced, the restriction of construction sequence is avoided, the construction is simple and quick, the construction progress is accelerated, and the construction safety is ensured.
(8) The few-column sectional type through-chimney coal-conveying stack bridge system and the arrangement method thereof cancel the trestle support columns near the chimney, accord with the design concept of industrialization in factories, and are beneficial to creating a comfortable, healthy and environment-friendly working environment.
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 included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Fig. 1 is a schematic structural diagram of a chimney-penetrating coal transporting trestle provided in the background art.
Fig. 2 is a schematic structural diagram of a few-column sectional type chimney-penetrating coal-conveying stack bridge system provided in embodiment 1 of the present invention.
Fig. 3 is a schematic diagram of a bracket according to embodiment 1 of the present invention.
Fig. 4 is a sectional view A-A in fig. 3 provided in example 1 of the present invention.
Fig. 5 is a schematic diagram of a bracket according to embodiment 1 of the present invention.
Fig. 6 is a sectional view of B-B in fig. 5 provided in embodiment 1 of the present invention.
Fig. 7 is a schematic diagram of each through hole provided in embodiment 1 of the present invention.
Fig. 8 is a schematic diagram of a deck of a coal handling stack bridge according to embodiment 1 of the present invention.
Fig. 9 is a schematic diagram of a bridge deck deformation joint according to embodiment 1 of the present invention.
Fig. 10 is a schematic view of a deformation joint of a water blocking edge provided in embodiment 1 of the present invention.
Fig. 11 is a schematic view of a bridge girder of a trestle according to 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 device comprises a 1-chimney steel truss trestle, a 2-chimney inner steel truss trestle, a 3-chimney inner steel truss trestle, a 4-chimney outer wall, a 5-first bracket, a 6-second bracket, a 7-third bracket, an 8-fourth bracket and a 9-first elliptical hole, wherein the first bracket is a steel truss trestle; 10-a second elliptical hole; 11-a first round hole; the steel plate reinforcing device comprises a 12-type bolt, a 13-bracket top embedded steel plate embedded part, a 14-landing leg column foot bottom plate, a 15-landing leg column, a 16-first polytetrafluoroethylene gasket, a 17-second polytetrafluoroethylene gasket, a 18-first fixed steel plate, a 19-backing plate, a 20-stiffening rib, a 21-second fixed steel plate, a 22-aluminum alloy or stainless steel part, a 23-aluminum alloy or stainless steel part, a 24-steel plate, a 25-ethylene propylene diene monomer waterproof coiled material, a 26-glass cotton felt, a 27-fine stone concrete filling, a 28-waterproof coiled material, a 29-galvanized steel plate, a 30-steel bar, a 31-low end bridge deck beam of a chimney steel truss landing stage, a 32-high end bridge deck beam of a 32-inner chimney steel truss, a 33-bridge deck longitudinal beam, a 34-low end bridge deck beam of a 34-inner chimney steel truss landing stage, a 35-high end bridge deck beam of a 36-bridge deck beam, a 37-bridge deck longitudinal beam, a 38-vertical stiffening plate, a 39-horizontal stiffening plate, a 40-third polytetrafluoroethylene gasket, a 41-fourth polytetrafluoroethylene gasket and a 42-third fixed steel plate.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. 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 present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. refer to an orientation or a positional relationship based on that shown in the drawings, and are merely relational terms, which are used for convenience in describing structural relationships of various components or elements of the present invention, and do not denote any one of the components 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 attached," "connected," "coupled," and the like are to be construed broadly and refer to either a fixed connection or an integral or removable connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present invention can be determined according to circumstances by a person skilled in the relevant art or the art, and is not to be construed as limiting the present invention.
Embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Example 1:
as shown in fig. 2, embodiment 1 of the present invention provides a few-column sectional type through-chimney coal-handling stack bridge system, which includes:
the chimney comprises a chimney-out steel truss trestle 1, a chimney-in steel truss trestle 2, a chimney-in steel truss trestle 3, a first bracket 5 for supporting the low end of the chimney-out trestle, a second bracket 6 for supporting the high end of the chimney-in trestle, a third bracket 7 for supporting the low end of the chimney-in trestle and a fourth bracket 8 for supporting the high end of the chimney-in trestle;
the high-end landing leg of the chimney-out steel truss landing stage 1 is connected with a landing stage support column or a building frame column, and the low-end landing leg of the chimney-out steel truss landing stage 1 is connected with a first bracket 5 on the outer side of the chimney outer cylinder wall 4 through a first fixed hinge support;
the high-end landing leg of the inner steel truss landing leg 2 of the chimney is connected with the second bracket 6 on the inner side of the outer cylinder wall 4 of the chimney through a first sliding support, and the low-end landing leg of the inner steel truss landing leg 2 of the chimney is connected with the third bracket 7 on the inner side of the outer cylinder wall 4 of the chimney through a second fixed hinge support;
the high-end landing leg of the chimney steel truss landing stage 3 is connected with a fourth bracket 8 on the outer side of the chimney outer cylinder wall 4 through a second sliding support, and the low-end landing leg of the chimney steel truss landing stage 3 is connected with a landing stage support column or a building frame column.
As shown in fig. 3 and 4, includes: the first bracket 5 supporting the lower end of the chimney trestle, the second bracket 6 supporting the upper end of the trestle in the chimney, the outer cylinder wall 4 of the chimney, the U-shaped bolt 12, the embedded steel plate embedded part 13 at the top of the bracket, the leg column foot bottom plate 14 of the trestle, the leg column 15 of the trestle, the first polytetrafluoroethylene gasket 16, the second polytetrafluoroethylene gasket 17, the first fixed steel plate 18, the backing plate 19, the stiffening rib 20 and the second fixed steel plate 21.
The bracket upper column foot supporting the lower end of the chimney trestle is connected to form a fixed hinge support, the U-shaped bolt 12 adopts double nuts, and is connected with the first bracket 5 supporting the lower end of the chimney trestle through a base plate 19 and a trestle leg column foot bottom plate 14, and the double nuts are welded after being screwed; the backing plate 19 is welded after the steel truss trestle is installed; the landing stage landing leg post 15 is connected with the landing stage landing leg post foot bottom plate 14 in a full-welded mode; the landing stage landing leg column foot bottom plate 14 is in full-welded connection with the embedded steel plate part 13 at the top of the bracket; stiffening rib 20 and bottom of landing stage leg post 15 the landing stage landing leg column foot bottom plate 14 is connected in full weld.
The bracket upper column foot of the high end of the trestle in the supporting chimney is connected into a sliding support, the U-shaped bolt 12 is positioned at the beginning and centered, and the double nuts are reversely screwed, so that the gap between the double nuts and the bottom plate is 1mm.
The first polytetrafluoroethylene gasket 16 is bonded with the landing stage landing leg column foot bottom plate 14, the second polytetrafluoroethylene gasket 17 is bonded with the embedded steel plate 13 at the top of the bracket, and in order to prevent the polytetrafluoroethylene gaskets 16 and 17 from disengaging when sliding, the ends of the first polytetrafluoroethylene gasket 16 and the landing stage landing leg column foot bottom plate 14 are welded and connected with the first fixed steel plate 18, gaps are reserved between the first polytetrafluoroethylene gasket 16 and the landing stage landing leg column foot bottom plate 14, and normal sliding between the polytetrafluoroethylene gaskets is ensured; the second polytetrafluoroethylene gasket 17 and the end part of the bracket top embedded steel plate embedded part 13 are welded and connected with a second fixed steel plate 21.
As shown in fig. 5 and 6, includes: the third bracket 7 supporting the lower end of the inner trestle of the chimney, the fourth bracket 7 supporting the upper end of the inner trestle of the chimney, the outer wall 4 of the chimney, the U-shaped bolt 12, the embedded steel plate 13 at the top of the bracket, the column foot bottom plate 14 of the landing leg, the landing leg column 15, the first polytetrafluoroethylene gasket 16, the second polytetrafluoroethylene gasket 17, the first fixed steel plate 18, the backing plate 19, the stiffening rib 20 and the second fixed steel plate 21.
The bracket upper column foot supporting the lower end of the inner trestle of the chimney is connected to form a fixed hinge support, the U-shaped bolt 12 adopts double nuts, and is connected with the third bracket 7 supporting the lower end of the outer trestle of the chimney through a base plate 19 and a trestle leg column foot bottom plate 14, and the double nuts are welded after being screwed;
the backing plate 19 is welded after the steel truss trestle is installed; the landing stage landing leg post 15 is connected with the landing stage landing leg post foot bottom plate 14 in a full-welded mode; the landing stage landing leg column foot bottom plate 14 is in full-welded connection with the embedded steel plate part 13 at the top of the bracket; stiffening rib 20 and bottom of landing stage leg post 15 the landing stage landing leg column foot bottom plate 14 is connected in full weld.
The bracket upper column foot supporting the high end of the chimney trestle is connected into a sliding support, the U-shaped bolt is positioned and centered initially, the double nuts are screwed reversely, and the gap between the double nuts and the bottom plate is 1mm; as shown in fig. 7, the column foot bottom plate 14 of the landing leg 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 displacement calculated under the temperature load, the first polytetrafluoroethylene gasket 16 is provided with a second elliptical hole 10 at the bolt position, the second polytetrafluoroethylene gasket 17 is provided with a first circular hole 11 at the bolt position, and the diameter is generally the bolt diameter plus 2mm.
The first polytetrafluoroethylene gasket 16 is bonded with the landing leg column foot bottom plate 14, the second polytetrafluoroethylene gasket 17 is bonded with the embedded steel plate 13 at the top of the bracket, and in order to prevent the first polytetrafluoroethylene gasket 16 from separating when the second polytetrafluoroethylene gasket 17 slides, the ends of the first polytetrafluoroethylene gasket 16 and the landing leg column foot bottom plate 14 are welded with the first fixed steel plate 18, and a gap is reserved between the first fixed steel plate 18 and the second polytetrafluoroethylene gasket 17 to ensure the normal sliding between the polytetrafluoroethylene gaskets; the second polytetrafluoroethylene gasket 17 and the end part of the bracket top embedded steel plate embedded part 13 are welded and connected with a second fixed steel plate 21.
As shown in fig. 8, the bridge deck of the coal-conveying stack bridge adopts a profiled steel sheet composite floor, and in order to release temperature deformation, a bridge deck deformation joint is arranged at a chimney inlet and outlet, and the bridge deck deformation joint is shown in fig. 9; the bridge deck of the coal transporting trestle is flushed by water, water blocking edges are arranged on two sides of the bridge deck, and the deformation joint method of the water blocking edges is shown in fig. 10.
As shown in fig. 9, the deck deformation joint includes: an aluminum alloy or stainless steel piece 22, an aluminum alloy or stainless steel piece 23, a 6mm thick steel plate 24, an ethylene propylene diene monomer waterproof roll 25, a glass wool mat 26 and a fine stone concrete filling 27.
As shown in fig. 10, the deformation joint of the water blocking edge includes: the waterproof coiled material 28, a galvanized steel plate 29 with the thickness of 8mm, two steel bars 30 with the diameter of 8mm, an ethylene propylene diene monomer waterproof coiled material, glass wool felt and fine stone concrete are filled; the waterproof coiled material 28 and the waterproof coiled material of the bridge deck deformation joint are integrally arranged, the 8mm thick galvanized steel sheet 29 and the water retaining edge are equal in height, and two 8mm steel bars 30 are bent and welded with the waterproof coiled material 28.
As shown in fig. 11, 31 is a low-end bridge deck beam of a steel truss trestle in a chimney, 32 is a high-end bridge deck beam of a steel truss in a chimney, 33 is a bridge deck longitudinal beam, 34 is a low-end bridge deck beam of a steel truss trestle in a chimney, and 35 is a high-end bridge deck beam of a steel truss trestle in a chimney.
Because the outer wall of the chimney is circular, the distance between the low-end bridge deck beam 31 of the steel truss trestle and the high-end bridge deck beam 32 of the steel truss trestle in the chimney and the distance between the low-end bridge deck beam 34 of the steel truss trestle and the high-end bridge deck beam 35 of the steel truss trestle in the chimney are larger in order to avoid touching the outer wall of the chimney, so that the bridge deck longitudinal beam at the position ensures the paving of the bridge deck, ensures the sliding displacement, is consistent with the position of the sliding support and coordinates the deformation. The bridge deck girder 33 is provided with sliding joints with the high-end bridge deck girder 32 of the steel truss in the chimney, and the bridge deck girder 33 is provided with sliding joints with the high-end bridge deck girder 35 of the steel truss trestle of the chimney, and the sliding joints are shown in fig. 12.
As shown in fig. 12, 36 is a deck beam, 37 is a deck girder, 38 is a vertical stiffener, 39 is a horizontal stiffener, 40 is a third polytetrafluoroethylene gasket, 41 is a fourth polytetrafluoroethylene gasket, and 42 is a third fixed steel plate.
The vertical stiffening plate 38, the horizontal stiffening plate 39 and the steel member contact part of the bridge deck 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 plate 39, in order to prevent slipping and falling, the third fixed steel plates 42 are arranged at the end parts of the third polytetrafluoroethylene gasket 40 and the fourth polytetrafluoroethylene gasket 41, the third fixed steel plates 42 are welded with the horizontal stiffening plate 39 and are 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 ensured, and the slipping distance L shown in the figure is required to be consistent with the slipping amount of the first sliding support and the second sliding support.
The invention effectively solves the adverse effect of temperature deformation and thrust caused by temperature difference inside and outside the chimney on the trestle, has good stress performance, ensures the safety and 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 setting of the trestle support columns, ensures engineering safety, greatly reduces the consumption of steel, concrete and steel bars, saves excavation engineering quantity, avoids water and soil loss, saves land occupation and saves investment. The invention has high requirement on 'de-industrialization', and is very practical under the conditions of roads around a chimney, buildings, equipment, underground existing pipe networks, channels, foundations and the like.
Example 2:
the embodiment 2 of the invention provides a method for arranging a few-column sectional type chimney-penetrating coal transporting trestle, which comprises the following steps:
connecting the high-end landing leg of the steel truss landing stage of the chimney with a landing stage support column or a building frame column, and connecting the low-end landing leg of the steel truss landing stage of the chimney with a first bracket on the outer side of the outer cylinder wall of the chimney through a first fixed hinge support;
connecting the high-end landing leg of the inner steel truss landing leg of the chimney with the second bracket on the inner side of the outer barrel wall of the chimney through a first sliding support, and connecting the low-end landing leg of the inner steel truss landing leg of the chimney with the third bracket on the inner side of the outer barrel wall of the chimney through a second fixed hinge support;
and connecting the high-end landing leg of the chimney steel truss landing leg with a fourth bracket outside the outer cylinder wall of the chimney through a second sliding support, and connecting the low-end landing leg of the chimney steel truss landing leg with a landing leg support column or a building frame column.
The structural design of the specific few-column sectional type chimney-penetrating coal transporting trestle is shown in embodiment 1, and is not repeated here.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. 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 few post segmentation wears chimney fortune coal stack bridge system which characterized in that:
comprising the following steps:
the system comprises a chimney-out steel truss trestle, a chimney-in steel truss trestle, a first bracket supporting the low end of the chimney-out trestle, a second bracket supporting the high end of the chimney-in trestle, a third bracket supporting the low end of the chimney-in trestle and a fourth bracket supporting the high end of the chimney-in trestle;
the high-end landing leg of the steel truss landing stage of the chimney is connected with a landing stage support column or a building frame column, and the low-end landing leg of the steel truss landing stage of the chimney is connected with a first bracket on the outer side of the outer cylinder wall of the chimney through a first fixed hinge support;
the high-end landing leg of the inner steel truss landing leg of the chimney is connected with the second bracket on the inner side of the outer barrel wall of the chimney through a first sliding support, and the low-end landing leg of the inner steel truss landing leg of the chimney is connected with the third bracket on the inner side of the outer barrel wall of the chimney through a second fixed hinge support;
the high-end landing leg of the chimney entering steel truss landing stage is connected with a fourth bracket outside the outer cylinder wall of the chimney through a second sliding support, and the low-end landing leg of the chimney entering steel truss landing stage is connected with a landing stage support column or a building frame column.
2. The few-column segmented through-chimney coal-handling stack bridge 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 through-chimney coal-handling stack bridge system of claim 1, wherein:
in the first fixed hinge support, a U-shaped bolt is connected with a first bracket supporting the lower end of a chimney trestle through a base plate and a trestle leg column foot bottom plate, and is welded after being screwed by double nuts;
the backing plate is welded after the steel truss trestle is installed, the trestle leg post is connected with the trestle leg post foot bottom plate in a full-welded mode, the bottom plate of the landing stage landing leg column foot is connected with the embedded steel plate part at the top of the bracket in a full-welded mode, and the stiffening ribs at the bottom of the landing stage landing leg column are connected with the bottom plate of the landing stage landing leg column foot in a full-welded mode.
4. The few-column segmented through-chimney coal-handling stack bridge system of claim 1, wherein:
in the first sliding support and the second sliding support, elliptical holes are formed in the column foot bottom plate of the landing stage landing leg at the positions of bolts, elliptical holes are formed in the positions of the bolts by the first polytetrafluoroethylene gaskets, and circular holes are formed in the positions of the bolts by the second polytetrafluoroethylene gaskets;
the first polytetrafluoroethylene gasket is bonded with the column foot bottom plate of the landing stage landing leg, and the second polytetrafluoroethylene gasket is bonded with the embedded steel plate part at the top of the bracket;
the first polytetrafluoroethylene gasket and the landing stage landing leg column foot bottom plate end connection first fixed steel plate reserve the gap between first fixed steel plate and the second polytetrafluoroethylene gasket, and the end connection second fixed steel plate of embedded part at second polytetrafluoroethylene gasket and bracket top.
5. The few-column segmented through-chimney coal-handling stack bridge system of claim 1, wherein:
the bridge deck of the chimney entering steel truss trestle and the bridge deck of the chimney exiting steel truss trestle adopt profiled steel sheet composite floor slabs, and bridge deck deformation joints are arranged at positions of the chimney entering and exiting.
6. The few-column segmented through-chimney coal-handling stack bridge system of claim 1, wherein:
the bridge deck of the chimney entering steel truss trestle and the bridge deck of the chimney exiting steel truss trestle are flushed 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 through-chimney coal-handling stack bridge system of claim 1, wherein:
the bridge deck cross beam and the bridge deck longitudinal beam of the chimney inlet steel truss trestle and the chimney outlet steel truss trestle are provided with sliding joints.
8. The few-column segmented through-chimney coal-handling stack bridge system of claim 7, wherein:
in the sliding joint, vertical stiffening rib, horizontal stiffening rib and bridge floor crossbeam steel member contact department all carry out full-weld connection, and the lower limb of third polytetrafluoroethylene gasket and bridge floor longeron bonds, and fourth polytetrafluoroethylene gasket bonds with the horizontal stiffening plate, sets up the third fixed steel sheet at the tip of third polytetrafluoroethylene gasket and fourth polytetrafluoroethylene gasket, and the third fixed steel sheet welds with the horizontal stiffening plate to reserve certain distance with bridge floor longeron lower limb.
9. A method for arranging a few-column sectional type chimney-penetrating coal transporting trestle is characterized by comprising the following steps of:
the method comprises the following steps:
connecting the high-end landing leg of the steel truss landing stage of the chimney with a landing stage support column or a building frame column, and connecting the low-end landing leg of the steel truss landing stage of the chimney with a first bracket on the outer side of the outer cylinder wall of the chimney through a first fixed hinge support;
connecting the high-end landing leg of the inner steel truss landing leg of the chimney with the second bracket on the inner side of the outer barrel wall of the chimney through a first sliding support, and connecting the low-end landing leg of the inner steel truss landing leg of the chimney with the third bracket on the inner side of the outer barrel wall of the chimney through a second fixed hinge support;
and connecting the high-end landing leg of the chimney steel truss landing leg with a fourth bracket outside the outer cylinder wall of the chimney through a second sliding support, and connecting the low-end landing leg of the chimney steel truss landing leg with a landing leg support column or a building frame column.
10. The arrangement method of the few-column sectional type chimney-penetrating coal transporting trestle as claimed in claim 9, wherein the arrangement method is characterized in that:
the sliding distance between the sliding joints of the bridge deck beam and the bridge deck longitudinal beam of the chimney inlet steel truss trestle and the chimney outlet steel truss trestle is equal to that of the second sliding support.
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