CN108035607B - Buckling-restrained replacement device and method for rush repair, replacement and maintenance of steel truss tower - Google Patents
Buckling-restrained replacement device and method for rush repair, replacement and maintenance of steel truss tower Download PDFInfo
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- CN108035607B CN108035607B CN201711415981.6A CN201711415981A CN108035607B CN 108035607 B CN108035607 B CN 108035607B CN 201711415981 A CN201711415981 A CN 201711415981A CN 108035607 B CN108035607 B CN 108035607B
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 17
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
- E04H12/10—Truss-like structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The buckling restrained replacing device comprises buckling restrained excessive rod pieces, connecting joints and connecting members, wherein the buckling restrained excessive rod pieces comprise core members, connecting sleeves, buckling restrained interlayers and carbon fiber material layers; the connecting joint comprises stiffening plates, bolt holes for replacing members on the node plates, connecting stiffening plates and connecting joint ends, the connecting joint is arranged on each node plate of the power transmission tower, and two ends of the buckling-preventing excessive rod piece are respectively connected with the connecting joint on the node plate through connecting members. And a buckling-restrained replacement method used in the rush repair, replacement and maintenance work of the steel truss tower is provided. The invention can provide a safe and reliable steel truss tower local component replacement device and process, thereby ensuring the construction safety in the work of rush repair, replacement and maintenance of the steel truss tower, greatly prolonging the service life of the steel truss tower and greatly saving various costs.
Description
Technical Field
The invention relates to the technical field of power transmission equipment and the field of steel structures, in particular to an anti-buckling replacement device and method for steel truss tower rush repair, replacement and maintenance work.
Background
In recent years, to adapt to the high-speed increase of the economy of China, the power grid scale of China is larger, the voltage level is higher, and the power grid structure is complex. Meanwhile, the requirements of the national social economic development on the power grid are higher and higher, and in the economically developed areas, particularly in the areas such as Zhujiang delta and the like, the lines need to be routed in industrial areas, resident dense areas or between two established lines, the corridor for erecting the power transmission line is extremely tense, and the contradiction between the corridor for the power transmission line and land resources is very prominent. How to ensure safe and stable operation of the power grid and ensure that the power grid supplies power to the whole society safely and reliably is a great problem about national life and national safety.
The power transmission tower is a lattice type high-rise structure, is an important component of a power transmission line, has the characteristics of high flexibility, small damping and the like, and currently, most power transmission towers basically consist of angle steel (or round steel) and resist external load by means of the strength and rigidity of the power transmission towers. On the one hand, the current power transmission distances are long, high-voltage transmission is adopted in some cases, and in order to avoid potential safety hazards existing in high voltage, and also in order to realize urban construction, the height of a common high-voltage power transmission tower is more than thirty meters. Under the action of external load, partial components of the power transmission tower are easy to deform partially, and for a long time, the components are easy to deform greatly to cause strength and instability damage; on the other hand, the power transmission tower mainly adopts a galvanized steel structure, is exposed in the windblown and insolated environment for a long time, particularly the power transmission tower with the galvanized steel structure is polluted in coastal areas and industries, the power transmission tower has great loss, the components are easy to corrode, and the service life is greatly shortened. Therefore, workers need to repair and maintain the power transmission tower regularly, but when certain components in the structure deform, the current repair and maintenance work is basically limited to local reinforcement of the original structure, spraying of anti-corrosion materials and the like. For example, when a certain tower column vertically borne in the power transmission tower is deformed to a certain extent, if any one is released, the whole power transmission tower is unstable and collapses, if general reinforcement is adopted, the rigidity distribution of the structure is unbalanced, the safety of the structure needs to be recalculated and evaluated, and otherwise, the power transmission tower needs to be dismantled and rebuilt. It is relatively more economical to replace such undesirable components that are rebuilt in response to some components not meeting the load bearing capacity volatile deformation requirements. However, conventional replacement work requires a large amount of equipment and presents a large safety risk.
Disclosure of Invention
Aiming at the problems existing in the prior steel truss tower rush repair and maintenance work, the invention provides the buckling-restrained replacement device used in the steel truss tower rush repair, replacement and maintenance work, and can provide a safe and reliable steel truss tower local component replacement device and method, thereby ensuring the construction safety in the steel truss tower rush repair, replacement and maintenance work, greatly prolonging the service life of the steel truss tower and greatly saving various costs.
The technical scheme adopted for solving the technical problems is as follows:
the buckling restrained replacing device comprises buckling restrained excessive rod pieces, connecting joints and connecting members, wherein the buckling restrained excessive rod pieces comprise core members, connecting sleeves, buckling restrained interlayers and carbon fiber material layers, the two core members are connected through the connecting sleeves, the sleeves are sleeved outside each core member, the buckling restrained interlayers are arranged between the core members and the inner walls of the sleeves, and the carbon fiber material layers are arranged outside the connecting sleeves;
the connecting joint comprises a stiffening plate, a replacement component bolt hole on the node plate, a connecting stiffening plate and a connecting joint end part, wherein the stiffening plate and the connecting stiffening plate are both fixed on the node plate, the two stiffening plates are connected through the connecting stiffening plate, the node plate is provided with the replacement component bolt hole on the node plate, and the connecting joint end part is provided with the connecting joint end part bolt hole;
the connecting joints are arranged on each node plate of the power transmission tower, and two ends of the buckling restrained excessive rod piece are respectively connected with the connecting joints on the node plates through connecting members.
Further, component bolt holes are replaced on the node plates which are arranged on the node plates corresponding to the main body components of the power transmission tower; the connecting stiffening plate is connected to the node plate in a welding mode; in order to ensure the stability of the connection stiffening plate in and out of the plane, the stiffening plate is connected to the node plate and the connection stiffening plate in a welding mode; welding the end parts of the connecting joints on the connecting stiffening plates; the bolt holes at the end parts of the connecting joints are arranged on the end parts of the connecting joints according to the stress calculation to form the connecting joints.
Still further, the first core member bolt hole, the second core member bolt hole and the connecting sleeve bolt hole are respectively arranged on the core member and the connecting sleeve; the two core components are connected with the connecting pipe sleeve through the connecting component; the sleeve is arranged outside the core component, and the core component is positioned at the middle part of the containing range of the sleeve on the cross section.
In the replacement process of a certain component of the power transmission tower, an anti-buckling excessive rod piece is connected with the end parts of connecting joints of the two ends of the power transmission tower, which are required to be replaced, through connecting components; and then the component to be replaced is disassembled, a new component is replaced, and finally the buckling transition rod piece is disassembled, so that the replacement is completed.
Further, the replacement method includes the steps of:
(1) Adopting a node plate pattern at a node position at the initial stage of constructing the power transmission tower, namely determining the number and the aperture of bolt holes on the end part of the connecting joint by design calculation;
(2) Designing an anti-buckling transition rod piece aiming at a component to be replaced of the power transmission tower;
(3) Processing and manufacturing according to the design drawing of the anti-buckling excessive rod piece, and transporting to the site;
(4) And connecting the excessive buckling rod piece with the connecting joints at the two ends of the member to be replaced through the connecting member, removing the member to be replaced, replacing a new member, and finally removing the excessive buckling rod piece, thereby completing the replacement.
The technical conception of the invention is as follows: the buckling-restrained replacement device used in the rush repair, replacement and maintenance work of the steel truss tower is characterized in that defective components in the power transmission tower can be safely replaced by the device of the invention, so that the safety of the structure is ensured; in a certain project or in a standardized drawing, a plurality of electric transmission towers of the same type are designed and manufactured for each type of electric transmission tower, a plurality of anti-buckling excessive rods (the anti-buckling excessive rods can be assembled into new anti-buckling excessive rods in a combined mode) are connected through excessive joints on a node plate of the electric transmission tower, new components are installed after components needing to be replaced are removed, and then the anti-buckling excessive rods are removed, so that the replacement requirement is met. Therefore, the construction safety in the rush repair, replacement and maintenance work of the steel truss tower is ensured, the service life of the steel truss tower is greatly prolonged, and various costs can be greatly saved.
Compared with the prior art, the invention has the following beneficial technical effects:
(1) According to the invention, the buckling restrained excessive rod piece is used as a supporting member for replacing a defective rod piece in the power transmission tower, the length of the buckling restrained excessive rod piece can be set longer, the strength of a core material can be fully utilized, the cross section of the member is greatly reduced compared with that of a pure steel member, and an excessive joint can be set relatively smaller, so that the appearance of the outer vertical surface of the power transmission tower is not influenced; the anti-buckling excessive rod piece can be repeatedly utilized and can be used in combination, and the anti-buckling excessive rod piece has good cost performance when used in the power transmission towers of the same type.
(2) The invention adopts the new components to replace the original defective components, can ensure that the components in the power transmission tower can be replaced after tiny defects (local buckling, local rusting and the like) and before great deformation and great weakening, ensure that the power transmission tower has the condition that some other bearing components are unstable or broken to generate unstable collapse under the action of external load, greatly prolong the service life of the steel truss tower and greatly save various costs.
(3) The invention adopts the procedures of supporting and then replacing, can greatly ensure the safety of replacement work and reduce the life safety danger of constructors and the danger of structural collapse to the minimum.
(4) The invention has the advantages of no need of a large amount of equipment in construction, simple process, convenient construction, short construction period, less manpower input, high construction efficiency and low cost, and can bring huge economic benefit if being applied to the existing iron tower construction, iron tower maintenance, rush repair and replacement.
Drawings
Fig. 1 is a schematic diagram of a typical part of a transmission tower of the present invention that needs replacement.
Figure 2 is an exploded view of the present invention buckling restrained bar.
FIG. 3 is a schematic view of a transition joint connection of the present invention.
Figure 4 is a view of the invention in combination with an anti-buckling excessive rod assembly.
Fig. 5 is an alternative schematic view of the transverse stress member of the present invention.
Fig. 6 is an alternative schematic view of a vertical force member of the present invention.
Figure 7 is a schematic diagram of a force-receiving member replacement step in a power transmission tower of the present invention.
In fig. 1 to 7, 1 is an anti-buckling excessive rod member; 11 is a core member; 12 is a connecting sleeve; 13 is a sleeve; 14 is an anti-buckling interlayer; 15 is a bolt hole on the first core member; reference numeral 16 denotes a bolt hole in the second core member; 17 is a bolt hole on the connecting sleeve; 18 is a carbon fiber material layer; 19 is a connecting member; 2 is a connecting joint; 21 is a stiffening plate; 22 is a replacement component bolt hole on the gusset plate; 23 is a connecting stiffening plate; 24 is the end of the connecting joint; 241 is the connecting joint end bolt hole; 25 is a gusset plate; 3 is a connecting member; 4 is a power transmission tower; 41 is a vertical force-bearing member; 42 is a transverse force member; 43 is a connecting member; 44 is the node location.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
Referring to fig. 1 to 7, an anti-buckling replacement device for use in rush repair, replacement and maintenance work of a steel truss tower comprises an anti-buckling excessive rod, a connecting joint and a connecting member, wherein the anti-buckling excessive rod comprises a core member, a connecting sleeve, a sleeve, an anti-buckling interlayer and a carbon fiber material layer, the two core members are connected through the connecting sleeve, each core member is sleeved with the sleeve, the anti-buckling interlayer is arranged between the core member and the inner wall of the sleeve, and the carbon fiber material layer is arranged outside the connecting sleeve;
the connecting joint comprises a stiffening plate, a replacement component bolt hole on the node plate, a connecting stiffening plate and a connecting joint end part, wherein the stiffening plate and the connecting stiffening plate are both fixed on the node plate, the two stiffening plates are connected through the connecting stiffening plate, the node plate is provided with the replacement component bolt hole on the node plate, and the connecting joint end part is provided with the connecting joint end part bolt hole;
the connecting joints are arranged on each node plate of the power transmission tower, and two ends of the buckling restrained excessive rod piece are respectively connected with the connecting joints on the node plates through connecting members.
Further, component bolt holes are replaced on the node plates which are arranged on the node plates corresponding to the main body components of the power transmission tower; the connecting stiffening plate is connected to the node plate in a welding mode; in order to ensure the stability of the connection stiffening plate in and out of the plane, the stiffening plate is connected to the node plate and the connection stiffening plate in a welding mode; welding the end parts of the connecting joints on the connecting stiffening plates; the bolt holes at the end parts of the connecting joints are arranged on the end parts of the connecting joints according to the stress calculation to form the connecting joints.
Still further, the first core member bolt hole, the second core member bolt hole and the connecting sleeve bolt hole are respectively arranged on the core member and the connecting sleeve; the two core components are connected with the connecting pipe sleeve through the connecting component; the sleeve is arranged outside the core component, and the core component is positioned at the middle part of the containing range of the sleeve on the cross section.
When the power transmission tower is designed, the node plates at the node positions in the power transmission tower are fully designed into the form of the connecting joint 2, and the connecting joint 2 comprises stiffening plates 21, replacement component bolt holes 22 on the node plates, connecting stiffening plates 23, connecting joint end parts 24 and connecting joint end part bolt holes 241. The node plate 25 is provided with a replacement member bolt hole 22 on the node plate which is suitable for the main body member of the transmission tower; the connecting stiffening plate 23 is connected to the node plate 25 in a welding manner; to ensure the stability of the connection stiffening plate 23 in and out of the plane, the stiffening plate 21 is connected to the gusset plate 25 and the connection stiffening plate 23 by welding; the end 24 of the connecting joint is welded on the connecting stiffening plate 23; the joint end bolt hole 241 is provided in the joint end 24 by force calculation to form the joint 2.
In operation of a power transmission tower, a certain member needs to be replaced, firstly, an anti-buckling excessive rod piece 1 is designed according to the stress condition of the member, and the anti-buckling excessive rod piece 1 comprises a core member 11, a connecting sleeve 12, a sleeve 13, an anti-buckling interlayer 14, a bolt hole 15 on the first core member, a bolt hole 16 on the second core member, a bolt hole 17 on the connecting sleeve, a carbon fiber material 18 and a connecting member 19. Wherein, the core component 11 and the connecting sleeve 12 are respectively provided with a first core component bolt hole 15, a second core component bolt hole 16 and a connecting sleeve bolt hole 17; a connecting sleeve 12 is arranged between the core components 11 and is connected through a connecting component 19; the sleeve 13 is arranged on the outer side of the core member 11, the core member 11 is positioned at the middle part of the range of the sleeve 13 in the cross section, the buckling restrained interlayer 14 is arranged between the core member 11 and the sleeve 13, and the segmented members are connected through the carbon fiber material 18 to form the buckling restrained excessive rod piece 1.
In the process of replacing a certain component of the power transmission tower, firstly, connecting the buckling restrained excessive rod piece 1 with the connecting joint end parts 24 of the connecting joints 2 at the two ends of the component to be replaced of the power transmission tower through the connecting component 3; and then removing the member to be replaced, replacing a new member, and finally removing the excessive buckling rod piece 1, thereby completing the replacement.
As shown in fig. 2 to 5, the buckling restrained replacing device for the rush repair, replacement and maintenance work of the steel truss tower comprises a buckling restrained member bar 1, a connecting joint 2 and a connecting member 3, wherein the buckling restrained member bar 1 comprises a core member 11, a connecting sleeve 12, a sleeve 13, a buckling restrained interlayer 14, a bolt hole 15 on a first core member, a bolt hole 16 on a second core member, a bolt hole 17 on the connecting sleeve, a carbon fiber material 18 and a connecting member 19; the connection joint 2 includes a stiffening plate 21, a replacement member bolt hole 22 on the gusset plate, a connection stiffening plate 23, a connection joint end 24, a connection joint end bolt hole 241, and a gusset plate 25.
The connecting joints are arranged on each node plate of the power transmission tower, and two ends of the buckling restrained excessive rod piece are respectively connected with the connecting joints on the node plates through connecting members.
Preferably, the core member is made of steel with the brand number of Q420 or a high polymer material with the strength exceeding Q420;
preferentially, the core component can be in a round pipe form, a square pipe form, a solid steel form and the like, and the specifications are consistent;
preferably, the total length of the core member is 1m,2m,5m,10m, and other length forms can be manufactured;
preferentially, bolt holes are required to be formed in the two ends of the core member, and the surface of the core member is required to be subjected to sand blasting treatment, so that the surface roughness of the core member reaches Sa2.5 level, and the number and the diameter of the bolt holes are set according to a design envelope value;
preferentially, the bolts adopt high-strength bolts, and the number and the diameter of the bolts are set according to the designed envelope value;
the peripheral devices comprise sleeves and buckling-restrained interlayers, and are connected through carbon fiber materials;
preferably, the sleeve can be made of steel pipes or metal pipes with various specifications on the market, wherein the steel pipes or metal pipes can be round, square, rectangular steel pipes and the like, or are formed by welding two plate arms which are formed by bending a metal plate by 90 degrees and are mutually perpendicular folded plates;
preferably, the overall length of the sleeve is 200mm shorter than the overall length of the core member;
preferentially, the sleeve adopts various specifications of steel pipes or metal pipes on the market;
the buckling-restrained interlayer can be made of a high polymer material or a concrete material;
the polyurethane material is preferably adopted, and the polyurethane layer is formed by pouring liquid polyol and isocyanate into a cavity of the steel pipe in proportion for chemical reaction;
preferably, the liquid polyol, isocyanate and glass or ceramic microbeads with the diameter of 20-200 mu m are prepared according to the volume ratio of 1:1:1.5;
the transition joints are arranged at all main nodes of the power transmission tower;
preferentially, bolt holes are formed in the transition joint, and the number and the diameter of the bolt holes are set according to a design envelope value;
preferentially, the material which is the same as the core material is preferentially adopted in the transition joint;
the connecting member can be a pin bolt or a high-strength bolt, and the number and the diameter of the pin bolt or the bolt are determined according to the calculated envelope value.
As shown in fig. 1, the power transmission tower 420 is in the market of X, the power transmission tower 4 mainly comprises a vertical stress member 41, a transverse stress member 42, a connecting member 43 and a node position 44, a novel node plate type-connecting joint 2 (shown in fig. 3) is adopted at the node position 44 at the initial stage of power transmission tower construction, wherein the stiffening plate 21 and the connecting stiffening plate 23 can ensure that the connecting joint end 24 does not have larger displacement when being stressed in a short time, so that the connecting joint has good stability, the connecting joint end 24 is used for fixing the joint of the buckling-restrained excessive rod member 1 when the vertical stress member 41 or the transverse stress member 42 is replaced, and the effect of transmitting the structure to the part of the vertical stress member 41 or the transverse stress member 42 can be completely transferred to the buckling-restrained excessive rod member 1 in a short time, thereby carrying out the replacement work of part of the vertical stress member 41 or the transverse stress member 42. The connection joint end 24 is a circular tube, the diameter of which is determined by the envelope internal force calculated by the design (the maximum internal force of each member in the power transmission tower 4), and the number and the aperture of the connection joint end bolt holes 241 on the connection joint end 24 are also determined by the envelope internal force calculated by the design. The connection joint 2 needs to be subjected to fire-proof and corrosion-proof treatments of a higher level than the transmission tower 4. Wherein, the transverse stress member 42 is made of L80x6 and Q345 steel; the gusset plate 25 is-12X 200X600, Q345 steel; the stiffening plate 23 is welded on the gusset plate 25 by adopting steel materials of-10X 200X300 and Q345; the stiffening plate 21 adopts a chamfer form according to actual conditions, and is made of Q345 steel and welded on the gusset plate 25 and the stiffening plate 23; the end 24 of the connecting joint adopts a seamless steel pipe with the length of 100mm, the diameter of 150mm and the wall thickness of 10mm, and is made of Q420 steel; one side of the connecting joint is provided with four holes, namely an end bolt hole 241 with a diameter of 17mm and up and down.
After many years, under the influence of the environment, a transverse stress member 42 of an A part of a certain power transmission tower 4 in X city is corroded unevenly, and the power transmission tower 4 needs to be replaced. Project staff reviews the design data of the power transmission tower 4, designs the buckling restrained excessive rod member 1 (shown in fig. 2) aiming at the transverse stress member 42 of the A part of the power transmission tower 4, and can realize the replacement of the defective part of the large-span power transmission tower 4 by utilizing a smaller section through the buckling restrained excessive rod member 1. The buckling restrained bar 1 comprises a core member 11, a connecting sleeve 12, a sleeve 13, a buckling restrained interlayer 14, bolt holes 15 on the first core member, bolt holes 16 on the second core member, bolt holes 17 on the connecting sleeve, a carbon fiber material 18 and a connecting member 19. Wherein the length of the nodes at the two ends of the transverse stress member 42 of the part A is 5000mm, the core member 11 is a seamless steel pipe with the length of 2500mm, the diameter of 160mm and the wall thickness of 9mm, and the steel material Q420; the core component 11 is provided with a first core component upper bolt hole 15 and a second core component upper bolt hole 16, and the diameter of the first core component upper bolt hole and the second core component upper bolt hole is 17mm; the two core components 11 are connected by adopting a connecting sleeve 12 and a connecting component 19, the connecting sleeve 12 adopts a seamless steel pipe with the diameter of 170mm and the wall thickness of 9mm, Q420 steel materials, and the connecting component 19 adopts a pin shaft form with the diameter of 16mm; the sleeve 13 is made of square tubes with the length of 200mm and the thickness of 6mm, the buckling restrained interlayer 14 is made of polyurethane materials, and the lengths of the sleeve 13 and the buckling restrained interlayer 14 are 2400mm; the core member 11 is integrally connected by a connecting member 19, and the sleeve 13 and the buckling restrained interlayer 14 are arranged on the outer side of the core member, and the buckling restrained excessive rod member 1 is formed by wrapping seams through a carbon fiber material 18.
As shown in fig. 4, the excessive buckling member 1 is connected to the impact joints 2 at two ends of the transverse stress member 42 of the a part through the connecting member 3 (10.9M 16 is adopted), then the transverse stress member 42 is removed, a new transverse stress member 42 is replaced, and finally the excessive buckling member 1 is removed and replaced.
Example 2
As shown in fig. 2 to 4 and fig. 6, an buckling restrained replacing device for use in the rush repair, replacement and maintenance work of a steel truss tower comprises an buckling restrained excessive rod member 1, a connecting joint 2 and a connecting member 3, wherein the buckling restrained excessive rod member 1 comprises a core member 11, a connecting sleeve 12, a sleeve 13, a buckling restrained interlayer 14, a bolt hole 15 on a first core member, a bolt hole 16 on a second core member, a bolt hole 17 on the connecting sleeve, a carbon fiber material 18 and a connecting member 19; the connection joint 2 includes a stiffening plate 21, a replacement member bolt hole 22 on the gusset plate, a connection stiffening plate 23, a connection joint end 24, a connection joint end bolt hole 241, and a gusset plate 25.
As shown in fig. 1, the power transmission tower 4 mainly comprises a vertical stress member 41, a transverse stress member 42, a connecting member 43 and a node position 44, and a novel node plate type-connecting joint 2 (shown in fig. 3) is adopted at the node position 44 at the initial stage of power transmission tower construction, wherein the stiffening plate 21 and the connecting stiffening plate 23 can ensure that the connecting joint end 24 does not have larger displacement when being stressed in a short time, so that the connecting joint has good stability, the connecting joint end 24 is used for fixing the joint of the buckling-restrained excessive member 1 when the vertical stress member 41 or the transverse stress member 42 is replaced, and the effect that the structure is transferred to the part of the vertical stress member 41 or the transverse stress member 42 can be completely transferred to the buckling-restrained excessive member 1 in a short time, thereby carrying out the replacement work of part of the vertical stress member 41 or the transverse stress member 42. The connection joint end 24 is a circular tube, the diameter of which is determined by the envelope internal force calculated by the design (the maximum internal force of each member in the power transmission tower 4), and the number and the aperture of the connection joint end bolt holes 241 on the connection joint end 24 are also determined by the envelope internal force calculated by the design. The connection joint 2 needs to be subjected to fire-proof and corrosion-proof treatments of a higher level than the transmission tower 4. Wherein, the transverse stress member 42 is made of L120x10 and Q345 steel; the gusset plate 25 is-20X 300X700 and Q345 steel; the stiffening plate 23 is welded on the gusset plate 25 by adopting steel materials of-16X 300X400 and Q345; the stiffening plate 21 adopts a chamfer form according to actual conditions, and is made of Q345 steel and welded on the gusset plate 25 and the stiffening plate 23; the end 24 of the connecting joint adopts a seamless steel pipe with the length of 120mm, the diameter of 200mm and the wall thickness of 12mm, and is made of Q420 steel; one side of the connecting joint is provided with four holes, namely an upper hole and a lower hole, the diameter of the connecting joint end bolt hole 241 is 21 mm.
After many years, under the influence of the environment, a certain power transmission tower 4 in the city X has uneven corrosion on the vertical stress member 41 of the B part of the power transmission tower 4, and needs to be replaced. Project staff reviews the design data of the power transmission tower 4, designs the buckling restrained excessive rod member 1 (shown in fig. 2) aiming at the vertical stress member 41 of the B part of the power transmission tower 4, and can realize the replacement of the defective part of the large-span power transmission tower 4 by utilizing a smaller section through the buckling restrained excessive rod member 1. The buckling restrained bar 1 comprises a core member 11, a connecting sleeve 12, a sleeve 13, a buckling restrained interlayer 14, bolt holes 15 on the first core member, bolt holes 16 on the second core member, bolt holes 17 on the connecting sleeve, a carbon fiber material 18 and a connecting member 19. Wherein the length of the nodes at two ends of the transverse stress member 42 of the part A is 7220mm, the core member 11 is a seamless steel pipe with the length of 3600mm, the diameter of 220mm and the wall thickness of 12mm, and the steel material Q420; the core member 11 is provided with a first core member upper bolt hole 15 and a second core member upper bolt hole 16, and the diameter of the first core member upper bolt hole and the second core member upper bolt hole is 21mm; the two core components 11 are connected by adopting a connecting sleeve 12 and a connecting component 19, the connecting sleeve 12 adopts a seamless steel pipe with the diameter of 240mm and the wall thickness of 12mm, Q420 steel materials, and the connecting component 19 adopts a pin shaft form with the diameter of 20mm; the sleeve 13 is made of square tubes with the length of 300mm and the thickness of 6mm, the buckling restrained interlayer 14 is made of polyurethane materials, and the lengths of the sleeve 13 and the buckling restrained interlayer 14 are 1700mm; the core member 11 is integrally connected by a connecting member 19, and the sleeve 13 and the buckling restrained interlayer 14 are arranged on the outer side of the core member, and the buckling restrained excessive rod member 1 is formed by wrapping seams through a carbon fiber material 18.
As shown in fig. 4, the excessive buckling rod piece 1 is connected to the connection joints 2 at two ends of the vertical stress member 41 of the B part through the connecting member 3 (10.9 grade M20), then the vertical stress member 41 is removed, a new vertical stress member 41 is replaced, and finally the excessive buckling rod piece 1 is removed and replaced.
Example 3
As shown in fig. 7, a buckling restrained replacement method for use in steel truss tower repair, replacement and maintenance works includes the steps of:
(1) In the early stage of power transmission tower construction, a novel node plate type is adopted at the node position, namely a connecting joint (shown in figure 3), and the number and the aperture of bolt holes on the end part of the connecting joint are also determined by the envelope internal force calculated by design.
(2) Project staff reviews the design data of the transmission tower and designs the anti-buckling transition rod piece (shown in figure 2) aiming at the components which need to be replaced of the transmission tower.
(3) Engineering is processed and manufactured according to the design drawing of the anti-buckling excessive rod piece, and the engineering is transported to the site;
(4) And connecting the excessive buckling rod piece with the connecting joints at the two ends of the member to be replaced through the connecting member, removing the member to be replaced, replacing a new member, and finally removing the excessive buckling rod piece, thereby completing the replacement.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention.
It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. The invention is thus not limited to the embodiments described herein, but rather, such modifications and improvements should be within the scope of the invention as will be apparent to those skilled in the art from the disclosure herein.
Claims (5)
1. A buckling restrained replacement device for steel truss tower rush repair, replacement and maintenance, its characterized in that: the buckling restrained replacing device comprises buckling restrained excessive rod pieces, connecting joints and connecting members, wherein the buckling restrained excessive rod pieces comprise core members, connecting sleeves, buckling restrained interlayers and carbon fiber material layers, the two core members are connected through the connecting sleeves, the sleeves are sleeved outside each core member, the buckling restrained interlayers are arranged between the core members and the inner walls of the sleeves, and the carbon fiber material layers are arranged outside the connecting sleeves;
the connecting joint comprises a stiffening plate, a replacement component bolt hole on the node plate, a connecting stiffening plate and a connecting joint end part, wherein the stiffening plate and the connecting stiffening plate are both fixed on the node plate, the two stiffening plates are connected through the connecting stiffening plate, the node plate is provided with the replacement component bolt hole on the node plate, and the connecting joint end part is provided with the connecting joint end part bolt hole;
the connecting joints are arranged on each node plate of the power transmission tower, and two ends of the buckling restrained excessive rod piece are respectively connected with the connecting joints on the node plates through connecting members.
2. The buckling restrained replacement device for rush repair, replacement and maintenance of steel truss towers of claim 1, wherein: the node plates are arranged on node plates which are matched with the main body components of the power transmission tower to replace component bolt holes; the connecting stiffening plate is connected to the node plate in a welding mode; in order to ensure the stability of the connection stiffening plate in and out of the plane, the stiffening plate is connected to the node plate and the connection stiffening plate in a welding mode; welding the end parts of the connecting joints on the connecting stiffening plates; the bolt holes at the end parts of the connecting joints are arranged on the end parts of the connecting joints according to the stress calculation to form the connecting joints.
3. The buckling restrained replacement device for rush repair, replacement and maintenance of steel truss towers according to claim 1 or 2, wherein: the core component and the connecting sleeve are respectively provided with a bolt hole on the first core component, a bolt hole on the second core component and a bolt hole on the connecting sleeve; the two core components are connected with the connecting pipe sleeve through the connecting component; the sleeve is arranged outside the core component, and the core component is positioned at the middle part of the containing range of the sleeve on the cross section.
4. A replacement method implemented by the buckling restrained replacement device for rush repair, replacement and maintenance of a steel truss tower according to claim 1, wherein: in the replacement process of a certain component of the power transmission tower, connecting the buckling restrained excessive rod piece with the end parts of the connecting joints of the two ends of the component to be replaced of the power transmission tower through the connecting component; and then the component to be replaced is disassembled, a new component is replaced, and finally the buckling transition rod piece is disassembled, so that the replacement is completed.
5. An alternative method as claimed in claim 4, characterized in that: the replacement method comprises the following steps:
(1) Adopting a node plate pattern at a node position at the initial stage of constructing the power transmission tower, namely determining the number and the aperture of bolt holes on the end part of the connecting joint by design calculation;
(2) Designing an anti-buckling transition rod piece aiming at a component to be replaced of the power transmission tower;
(3) Processing and manufacturing according to the design drawing of the anti-buckling excessive rod piece, and transporting to the site;
(4) And connecting the excessive buckling rod piece with the connecting joints at the two ends of the member to be replaced through the connecting member, removing the member to be replaced, replacing a new member, and finally removing the excessive buckling rod piece, thereby completing the replacement.
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| CN201711415981.6A CN108035607B (en) | 2017-12-25 | 2017-12-25 | Buckling-restrained replacement device and method for rush repair, replacement and maintenance of steel truss tower |
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| CN207988633U (en) * | 2017-12-25 | 2018-10-19 | 杭州市电力设计院有限公司 | For the anti-buckling alternative in the repairing of steel truss tower, replacement and maintenance work |
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| CN101575884A (en) * | 2009-05-27 | 2009-11-11 | 清华大学 | Reinforced-fiber composite constraining anti-buckling energy-consumption steel timbering |
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