CN113356053A - Stay cable steel tooth block anchoring structure and construction method - Google Patents
Stay cable steel tooth block anchoring structure and construction method Download PDFInfo
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- CN113356053A CN113356053A CN202110668022.5A CN202110668022A CN113356053A CN 113356053 A CN113356053 A CN 113356053A CN 202110668022 A CN202110668022 A CN 202110668022A CN 113356053 A CN113356053 A CN 113356053A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
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Abstract
The invention discloses a stay cable steel tooth block anchoring structure, which comprises a tower wall connecting piece and a steel anchoring tooth block fixed with the tower wall connecting piece; the tower wall connecting piece comprises a wall plate; the steel anchoring tooth block comprises two parallel and similar webs, a top plate fixedly arranged above the webs in an inclined mode, an anchoring backing plate fixedly arranged above the top plate in an inclined mode, and two parallel bearing plates vertically and fixedly arranged between the two webs; the two webs are welded and fixed with the wall plate in an inclined mode, and the vertical distances between the middle points of the right sides of the two webs and the wall plate are different; the pressure bearing plate, the web plate, the top plate and the wall plate form a closed box-shaped structure, or the pressure bearing plate, the web plate and the top plate form an open box-shaped structure. The web plate and the wall plate can be welded to form an angle, so that the problem of large transverse bridge inclination angle of the inhaul cable is solved; the invention has simple structure, definite force transmission and small size, and is suitable for the condition of small space in the tower.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a stay cable steel tooth block anchoring structure.
Background
The cable-stayed bridge is a bridge with a main beam directly pulled on a bridge tower by a plurality of guys, and is a structural system formed by combining a pressure-bearing tower, the pulled guys and a bending-bearing beam body. The stay cable anchoring section of the cable-stayed bridge cable tower is an important stressed member which can safely and uniformly transmit the concentrated force of the stay cable to the tower column, and can prevent the tower wall concrete from cracking under the action of the strong concentrated force of the stay cable.
The anchoring form of the stay cable on the bridge tower is divided into two main types, one is a traditional concrete anchoring structure, and the other is a steel anchor box and a steel anchor beam structure.
The first major concrete anchoring structure is the first one used in the beginning, and a raised anchoring tooth block is made on the side surface of the tower wall to anchor the stay cable, so that the structure has wide applicability, but cracks are easy to appear in the anchoring area of the bridge tower, the construction is troublesome due to the existence of the anchoring tooth block, and the structure is difficult to adapt to the condition that the transverse inclination angle of the stay cable is large.
The second major steel anchor box and steel anchor beam structure is a guy cable anchoring structure which is used more at present. The steel anchor box is anchored on the steel anchor box through the stay cable, the steel anchor box is connected with the concrete cable tower through the connecting piece, the structure is easy to control in field installation, convenient to construct, and suitable for cable-stayed bridges with larger space in the tower wall and larger medium span, but the efficiency of the steel anchor box for bearing horizontal component force of the stay cable is not higher than that of a steel anchor beam, and the annular prestress quantity of the tower wall is increased.
The steel anchor beam is anchored by placing a steel cross beam on a bracket of a concrete tower wall, and the stay cables are anchored on bearing plates at two ends of the steel cross beam, so that the structural steel cross beam has the highest capability of balancing horizontal force of the stay cables, is also suitable for cable-stayed bridges with larger space in the tower wall and more than medium span, but has high field installation precision and low efficiency, and the existing large-span cable-stayed bridge basically adopts the structure of the steel anchor beam. However, the steel anchor beam has large structure size and high requirement on space in the tower, and is not suitable for medium and small span cable-stayed bridges.
With the increasing of traffic flow, medium and small span cable-stayed bridges are gradually developed towards the wide direction, and the traditional concrete anchoring tooth block structure cannot adapt to the situation, so that the cable-stayed bridge tower anchoring structure which is slightly influenced by the space in the tower, can meet the requirement of large inclination angle of a cable transverse bridge, has reasonable stress, simple structure, economy, durability and convenient construction is urgently needed to be designed, and a corresponding construction method is feasible and necessary.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a stay cable steel tooth block anchoring structure which can meet the requirement of a small space in a tower, is suitable for the condition of a large horizontal bridge inclination angle of a stay cable, and has the advantages of definite force transmission, simple structure, small steel consumption and convenience in construction.
A stay cable steel tooth block anchoring structure comprises a tower wall connecting piece and a steel anchoring tooth block, wherein the tower wall connecting piece is pre-embedded in the inner side wall of a concrete tower column; the tower wall connecting piece comprises a wall plate close to the inner side wall of the concrete tower column; the steel anchoring tooth block comprises two webs which are parallel and similar to each other, a top plate fixedly arranged above the webs in an inclined mode, an anchor backing plate fixedly arranged above the top plate in an inclined mode, and two pressure bearing plates which are parallel to each other and vertically fixedly arranged between the two webs; the two webs are welded and fixed with the wall plate in an inclined mode, and the vertical distances between the middle points of the right side edges of the two webs and the wall plate are different; the pressure bearing plates are arranged in a trapezoid shape; the stay cable sequentially penetrates through the concrete tower column, the top plate and the anchor backing plate; the pressure bearing plate, the web plate, the top plate and the wall plate form a closed box-shaped structure, or the pressure bearing plate, the web plate and the top plate form an open box-shaped structure.
The web plate of the stay cable steel tooth block anchoring structure can be welded with the wall plate to form an angle, so that the stay cable steel tooth block anchoring structure is suitable for the problem of large transverse bridge inclination angle of the stay cable. Meanwhile, the stay cable steel anchoring tooth block is simple in structure, clear in force transmission, small in size and suitable for the condition that the space in the tower is small.
The vertical distances between the middle points of the two webs and the wall plate are different, and the transverse bridge inclination angle of the inhaul cable can be adapted in this way.
The pressure bearing plate, the web plate, the top plate and the wall plate form a closed box-shaped structure, or the pressure bearing plate, the web plate and the top plate form an open box-shaped structure. The closed box-shaped structure and the open box-shaped structure can transmit the axial force of the inhaul cable.
Furthermore, the web plate is arranged in a pentagonal shape, the web plate is welded with the top plate in a penetration mode, and the web plate is welded with the wall plate in a penetration mode; the pressure bearing plates are fixedly connected with the top plate, the web plate and the wall plate to form the closed box-shaped structure for transmitting the axial force of the inhaul cable. The above describes the closed box-like structure. One side of the web plate is welded with the top plate in a penetration mode, the other side of the web plate is welded with the wall plate in a penetration mode, and the vertical component force of the inhaul cable is transmitted to the concrete tower column through the tower wall connecting piece in this mode.
Furthermore, the web plates are arranged in an irregular hexagon, and one corner of the irregular hexagon is arranged in an inner arc shape; the web plate is welded with the top plate in a penetration mode, and the web plate is welded with the wall plate in a penetration mode; the pressure bearing plates are fixedly connected with the top plate and the web plate to form the open box-shaped structure for transmitting the axial force of the inhaul cable. The above describes an open box structure. One side of the web plate is in fusion penetration welding with the top plate, the other side of the web plate is in fusion penetration welding with the wall plate, and the vertical component force of the stay cable is transmitted to the concrete tower column through the tower wall connecting piece in such a way.
Furthermore, the steel anchoring tooth block also comprises two pressure bearing plate stiffening plates which are parallel to each other and two web plate stiffening plates which are parallel to each other; the pressure-bearing stiffening plates are perpendicular to the pressure-bearing plates and the top plate and are parallel to the web plate; the two web stiffening plates are rectangular plates and are perpendicular to the web plate and the top plate.
Furthermore, the two pressure-bearing stiffening plates are positioned in the middle of the pressure-bearing plate; the two pressure-bearing stiffening plates are a first stiffening plate and a second stiffening plate, the first stiffening plate is a rectangular plate and is welded with the pressure-bearing plate and the top plate to locally stiffen the pressure-bearing plate; the second stiffening plate is a trapezoid plate, and the second stiffening plate is connected with the wall plate, the bearing plate and the top plate. The pressure-bearing stiffening plate not only can provide local stiffening effect for the pressure-bearing plate, but also can transmit the vertical shearing force of the inhaul cable.
Furthermore, the web stiffening plate corresponds to the pressure bearing plate in position, and the web stiffening plate is connected with the web and the top plate. The web stiffening plate is not connected with the wall plate, so that the phenomenon of stress concentration at the connecting part can be avoided, and the local stiffening effect of the web is only provided.
Furthermore, through holes matched with the specifications of the inhaul cables are formed in the centers of the anchor backing plate and the top plate, the through hole in the anchor backing plate is a first through hole, the through hole in the top plate is a second through hole, and the inhaul cables penetrate through the second through hole and the first through hole in sequence; the pull cable is perpendicular to the anchor backing plate, and the pull cable is perpendicular to the top plate; the first through hole and the second through hole are coaxially arranged, and the peripheries of the first through hole and the second through hole are polished and tightly pressed and then are subjected to girth welding. Preferably, the first through hole and the second through hole may be provided with cable ducts.
Furthermore, the tower wall connecting piece also comprises a PBL perforated plate and studs; the PBL perforated plate is arranged in a T shape and is connected with the wall plate; the peg is connected to the wall panel.
Furthermore, a group of stay cable steel anchoring tooth block structures are respectively arranged on the side span and the mid-span side of the inner cavity of the concrete tower column; and the stay cable steel anchoring tooth block structure comprises a plurality of steel anchoring tooth blocks. According to the invention, a plurality of steel anchoring tooth blocks can be used as a group according to the construction condition of the concrete tower column, and are hoisted in place at one time, so that the on-site positioning and installation times are reduced, and meanwhile, the wall plate can be used as a part of a construction template, so that the number of the construction templates is reduced.
A construction method of a stay cable steel tooth block anchoring structure according to any one of claims 1 to 9, comprising the steps of:
the method comprises the following steps: the steel anchoring tooth block is welded in a factory for one-time manufacturing and forming;
step two: pouring the concrete tower column, wherein the tower wall connecting piece is buried into the side wall of the concrete tower column in the concrete tower column pouring process; the wall plate is abutted against the inner side wall of the concrete tower column, and the wall plate can be used as a part of a construction template in the concrete tower column pouring process, so that the number of the construction templates is reduced;
step three: accurately positioning and welding the steel anchoring tooth blocks one by one on the surface of the wall plate of the tower wall connecting piece; and then hoisting and installing the stay cable steel anchoring tooth block structures in place in groups according to the concrete tower column pouring sequence on site, or hoisting a plurality of steel anchoring tooth blocks in place at one time according to the concrete tower column construction condition.
Compared with the prior art, the invention has the beneficial effects that: the web plate of the stay cable steel tooth block anchoring structure and the wall plate can be welded to form an angle, so that the problem of large transverse bridge inclination angle of the stay cable is solved; the stay cable steel anchoring tooth block has simple structure, definite force transmission and small size, and is suitable for the condition of small space in the tower; according to the invention, a plurality of steel anchoring tooth blocks can be used as a group according to the construction condition of the concrete tower column, and are hoisted in place at one time, so that the number of times of on-site positioning and installation is reduced, and meanwhile, the wall plate can be used as a part of a construction template, so that the number of the construction templates is reduced.
Drawings
Fig. 1 is a vertical layout view of a stay cable steel anchoring tooth block type a structure according to an embodiment 1 of the present invention;
FIG. 2 is a plan view of a class A structure of a stay cable steel anchor block according to an embodiment 1 of the present invention;
FIG. 3 is a sectional view of class A structure of a stay cable steel anchor block according to embodiment 1 of the present invention, taken along line 1-1;
FIG. 4 is a sectional view of class 2-2 of a stay cable steel anchor block A structure according to embodiment 1 of the present invention;
FIG. 5 is a sectional view of class A structure of a stay cable steel anchor block according to embodiment 1 of the present invention taken along line 3-3;
FIG. 6 is a vertical layout view of a B-type structure of a stay cable steel anchoring tooth block in embodiment 2 of the present invention;
fig. 7 is a plan view of a class B structure of a stay cable steel anchoring tooth block according to embodiment 2 of the present invention;
FIG. 8 is a sectional view of class B stay cable steel anchor block of embodiment 2 of the present invention, taken along line 1-1;
FIG. 9 is a sectional view taken along line 2-2 of a B-type structure of a stay cable steel anchoring tooth block in accordance with embodiment 2 of the present invention;
FIG. 10 is a sectional view of class B structure of a stay cable steel anchor block according to embodiment 2 of the present invention taken along line 3-3;
in the figure: 1. an anchor backing plate; 2. a top plate; 3. a web; 4. a pressure bearing plate; 5. the pressure bearing plate is used for reinforcing the plate; 6. web stiffening plates; 7. wall plates; 8. a PBL perforated plate; 9. a stud; 10. a concrete tower column; 11. and (4) stay cables.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 10: a stay cable steel tooth block anchoring structure comprises a tower wall connecting piece and a steel anchoring tooth block, wherein the tower wall connecting piece is pre-embedded in the inner side wall of a concrete tower column 10; the tower wall connector comprises a wall plate 7 close to the inner side wall of the concrete tower column 10; the steel anchoring tooth block comprises two webs 3 which are parallel and similar to each other, a top plate 2 fixedly arranged above the webs 3 in an oblique direction, an anchor backing plate 1 fixedly arranged above the top plate 2 in the oblique direction, and two pressure-bearing plates 4 which are vertically and fixedly arranged between the two webs 3 in parallel; the two web plates 3 are welded and fixed with the wall plate 7 in an inclined mode, and the vertical distances between the middle points of the right side edges of the two web plates 3 and the wall plate 7 are different; the pressure bearing plate 4 is arranged in a trapezoid shape; the stay cable sequentially penetrates through the concrete tower column 10, the top plate 2 and the anchor backing plate 1; the pressure bearing plate 4, the web plate 3, the top plate 2 and the wall plate 7 form a closed box structure, or the pressure bearing plate 4, the web plate 3 and the top plate 2 form an open box structure.
The web plate 3 and the wall plate 7 of the stay cable steel tooth block anchoring structure can be welded to form an angle, so that the stay cable steel tooth block anchoring structure is suitable for the problem of large transverse bridge inclination angle of the stay cable. Meanwhile, the stay cable steel anchoring tooth block is simple in structure, clear in force transmission, small in size and suitable for the condition that the space in the tower is small.
The vertical distance between the middle point of the two webs 3 and the wall 7 is different, so that the transverse bridge inclination of the cable can be adapted.
The pressure bearing plate 4, the web plate 3, the top plate 2 and the wall plate 7 form a closed box structure, or the pressure bearing plate 4, the web plate 3 and the top plate 2 form an open box structure. The closed box-shaped structure and the open box-shaped structure can transmit the axial force of the inhaul cable.
Furthermore, the web plate 3 is arranged in a pentagonal shape, the web plate 3 is in penetration welding with the top plate 2, and the web plate 3 is in penetration welding with the wall plate 7; the bearing plate 4 is fixedly connected with the top plate 2, the web plate 3 and the wall plate 7 to form the closed box-shaped structure for transmitting the axial force of the inhaul cable. The above describes the closed box-like structure. One side of the web plate 3 is welded with the top plate 2 in a penetration mode, the other side of the web plate 3 is welded with the wall plate 7 in a penetration mode, and in this way, the vertical component force of the stay cable is transmitted to the concrete tower column 10 through the tower wall connecting piece.
Furthermore, the web plate 3 is arranged in an irregular hexagon, and one corner of the irregular hexagon is arranged in an inner arc shape; the web plate 3 is welded with the top plate 2 in a penetration mode, and the web plate 3 is welded with the wall plate 7 in a penetration mode; the bearing plate 4 is fixedly connected with the top plate 2 and the web plate 3 to form the open box-shaped structure for transmitting the axial force of the inhaul cable. The above describes an open box structure. One side of the web plate 3 is welded with the top plate 2 in a penetration mode, the other side of the web plate 3 is welded with the wall plate 7 in a penetration mode, and the vertical component force of the stay cable is transmitted to the concrete tower column 10 through the tower wall connecting piece in this mode.
Furthermore, the steel anchoring tooth block also comprises two pressure bearing plates 4 which are parallel to each other and two web plates 3 which are parallel to each other; the pressure-bearing stiffening plates are perpendicular to the pressure-bearing plate 4 and the top plate 2 and are parallel to the web plate 3; the two web 3 stiffening plates are rectangular plates, and the two web 3 stiffening plates are perpendicular to the web 3 and the top plate 2.
Furthermore, the two pressure-bearing stiffening plates are positioned in the middle of the pressure-bearing plate 4; the two pressure-bearing stiffening plates are a first stiffening plate and a second stiffening plate, the first stiffening plate is a rectangular plate with a notch, and the first stiffening plate is fixedly connected with the pressure-bearing plate 4 and the top plate 2 to locally stiffen the pressure-bearing plate 4; the second stiffening plate is a trapezoid plate, and the second stiffening plate is connected with the wall plate 7, the bearing plate 4 and the top plate 2. The pressure-bearing stiffening plate not only can provide local stiffening effect for the pressure-bearing plate 4, but also can transmit the vertical shearing force of the inhaul cable.
Furthermore, the web 3 stiffening plate corresponds to the pressure bearing plate 4 in position, and the web 3 stiffening plate is connected with the web 3 and the top plate 2. The web 3 stiffening plate is not connected with the wall plate 7, so that the phenomenon of stress concentration at the connecting part can be avoided, and only the local stiffening effect of the web 3 is provided.
Furthermore, through holes matched with the specifications of the inhaul cables are formed in the centers of the anchor backing plate 1 and the top plate 2, the through hole in the anchor backing plate 1 is a first through hole, the through hole in the top plate 2 is a second through hole, and the inhaul cables penetrate through the second through hole and the first through hole in sequence; the stay cable is perpendicular to the anchor backing plate 1, and the stay cable is perpendicular to the top plate 2; the first through hole and the second through hole are coaxially arranged, and the peripheries of the first through hole and the second through hole are polished and tightly pressed and then are subjected to girth welding. Preferably, the first through hole and the second through hole may be provided with cable ducts.
Further, the tower wall connecting piece also comprises a PBL perforated plate 8 and a stud 9; the PBL perforated plate 8 is arranged in a T shape, and the PBL perforated plate 8 is connected with the wall plate 7 in a welding mode; the peg 9 is welded to the wall plate 7.
Furthermore, a group of stay cable steel anchoring tooth block structures are respectively arranged on the side span and the mid-span side of the inner cavity of the concrete tower column 10; and the stay cable steel anchoring tooth block structure comprises a plurality of steel anchoring tooth blocks. According to the invention, a plurality of steel anchoring tooth blocks can be used as a group according to the construction condition of the concrete tower column 10, and are hoisted in place at one time, so that the on-site positioning and installation times are reduced, and meanwhile, the wall plate 7 can be used as a part of a construction template, so that the number of the construction templates is reduced.
A construction method of a stay cable steel tooth block anchoring structure according to any one of claims 1 to 9, comprising the steps of:
the method comprises the following steps: the steel anchoring tooth block is welded in a factory for one-time manufacturing and forming;
step two: pouring the concrete tower column 10, wherein in the pouring process of the concrete tower column 10, the tower wall connecting piece is buried into the side wall of the concrete tower column 10; the wall plate 7 is tightly close to the inner side wall of the concrete tower column 10, and the wall plate 7 can be used as a part of a construction template in the pouring process of the concrete tower column 10, so that the number of the construction templates is reduced;
step three: accurately positioning and welding the steel anchoring tooth blocks one by one on the surface of the wall plate 7 of the tower wall connecting piece; and then hoisting and installing the stay cable steel anchoring tooth block structures in groups in place according to the pouring sequence of the concrete tower column 10 on site, or hoisting a plurality of steel anchoring tooth blocks in one group in place at one time according to the construction condition of the concrete tower column 10.
According to the included angle relationship between the inhaul cable and the horizontal plane, the invention is divided into A, B types of structures to adapt to different horizontal bridge inclination angles of the inhaul cable, wherein the A type of structure is suitable for the condition that the included angle between the inhaul cable and the horizontal plane is less than 60 degrees, and the B type of structure is suitable for the condition that the included angle between the inhaul cable and the horizontal plane is more than 60 degrees. Wherein example 1 describes a class a architecture and example 2 describes a class B architecture.
Example 1:
as shown in fig. 1, 2, 3, 4 and 5, the preferred embodiment of the stay cable steel anchoring tooth block type a structure of the invention is suitable for the case that the included angle between the stay cable and the horizontal plane is less than 60 degrees.
The stay cable steel anchoring tooth block structure comprises a steel anchoring tooth block and a tower wall connecting piece, and a group of side span and a group of mid-span side of the inner cavity of the concrete tower column 10 are respectively arranged. Specifically, the web 3 of the steel anchor block is welded to the wall plate 7 of the tower wall connector, and the tower wall connector is embedded in the side wall of the concrete tower column 10. The connection between the stay cable steel anchoring tooth block structure and the concrete tower column 10 is realized through the mode. The non-perpendicular welding between the web 3 and the wall 7 is adapted in this way to the transverse bridge inclination of the cable. The inhaul cable 11 penetrates through the concrete tower column 10 and then is anchored on the steel anchoring tooth block, and cable force is transmitted to the concrete tower column 10 through the steel anchoring tooth block and the tower wall connecting piece.
The steel anchoring tooth block comprises an anchor backing plate 1, a top plate 2, a web plate 3, a bearing plate 4, a bearing plate stiffening plate 5 and a web plate stiffening plate 6.
The central positions of the anchor backing plate 1 and the top plate 2 are provided with through holes, the inner diameter of each through hole is determined by the specifications and models of the stay cable 10, the axis of the stay cable 10 is ensured to pass through the centers of the anchor backing plate 1 and the top plate 2, the stay cable 10 is perpendicular to the plane of the anchor backing plate 1, and the stay cable 10 is perpendicular to the plane of the top plate 2. The anchor backing plate 1 is arranged above the top plate 2, and the periphery of the anchor backing plate is welded after the center of the anchor backing plate is aligned, polished and tightly jacked.
The total two web 3 on the single steel anchor tooth piece, two web 3 mutual parallel arrangement, two web 3 shape is similar, is the pentagon, nevertheless 3 right side edge centre distance of web 7 distance is different to this adaptation cable transverse inclination. As shown in fig. 1, one side of the web 3 is fusion welded to the top plate 2, and the other side of the web 3 is fusion welded to the wall plate 7, so that the vertical component of the guy cable 11 is transmitted to the concrete tower 10 through the tower wall connector.
It is single total two on the steel anchor tooth piece bearing plate 4, two bearing plate 4 is trapezoidal plate, just mutual parallel arrangement between the bearing plate 4. Meanwhile, the bearing plate 4 is perpendicular to the web plate 3 and is welded with the top plate 2, the web plate 3 and the wall plate 7 in a penetration mode, so that the bearing plate 4, the web plate 3, the top plate 2 and the wall plate 7 form a closed box-shaped structure together, and axial force of a guy cable is transmitted.
The bearing plate stiffening plates 5 are divided into two parts, and are perpendicular to the bearing plates 4 and the top plate 2 and parallel to the web plates 3. As shown in fig. 5, the pressure-bearing plate stiffening plate 5 is disposed in the middle of the pressure-bearing plate 4, the first stiffening plate is a rectangular plate with a notch, one side of the first stiffening plate is welded to the pressure-bearing plate 4, and the other side of the first stiffening plate is welded to the top plate 2, so that only the pressure-bearing plate 4 is locally stiffened. The second stiffening plate is in a trapezoid plate shape, one side of the second stiffening plate is welded with the wall plate 7, one side of the second stiffening plate is welded with the bearing plate 4, and the other side of the second stiffening plate is welded with the top plate 2, so that the local stiffening effect of the bearing plate 4 is provided, and the transmission of the vertical shearing force of the inhaul cable is participated.
The web plate stiffening plates 6 are divided into two rectangular plates which are perpendicular to the web plate 3 and the top plate 2, and the two web plate stiffening plates 6 are parallel to each other. As shown in fig. 5, the web stiffening plate 6 corresponds to the pressure-bearing plate 4, is welded to the web 3 and the top plate 2, and has no connection relationship with the wall plate 7, so that stress concentration at the connection part is avoided, and only local stiffening function of the web 3 is provided.
Example 2:
as shown in fig. 6, 7, 8, 9 and 10, the preferred embodiment of the stayed cable steel anchoring tooth block B structure of the invention is suitable for the condition that the included angle between the stayed cable and the horizontal plane is more than 60 degrees.
The stay cable steel anchoring tooth block structure comprises a steel anchoring tooth block and a tower wall connecting piece, and a group of side span and a group of mid-span side of the inner cavity of the concrete tower column 10 are respectively arranged. Specifically, the web 3 of the steel anchor block is welded to the wall plate 7 of the tower wall connector, and the tower wall connector is embedded in the side wall of the concrete tower column 10. The connection between the stay cable steel anchoring tooth block structure and the concrete tower column 10 is realized through the mode. The non-perpendicular welding between the web 3 and the wall 7 is adapted in this way to the transverse bridge inclination of the cable. The inhaul cable 11 penetrates through the concrete tower column 10 and then is anchored on the steel anchoring tooth block, and cable force is transmitted to the concrete tower column 10 through the steel anchoring tooth block and the tower wall connecting piece.
The steel anchoring tooth block comprises an anchor backing plate 1, a top plate 2, a web plate 3, a bearing plate 4, a bearing plate stiffening plate 5 and a web plate stiffening plate 6.
The central positions of the anchor backing plate 1 and the top plate 2 are provided with through holes, the inner diameter of each through hole is determined by the specifications and models of the stay cable 10, the axis of the stay cable 10 is ensured to pass through the centers of the anchor backing plate 1 and the top plate 2, the stay cable 10 is perpendicular to the plane of the anchor backing plate 1, and the stay cable 10 is perpendicular to the plane of the top plate 2. The anchor backing plate 1 is arranged above the top plate 2, and the periphery of the anchor backing plate is welded after the center of the anchor backing plate is aligned, polished and tightly jacked.
The single steel anchor tooth block is provided with two webs 3 which are arranged in parallel, the two plates are similar in shape and are both in an irregular hexagon with an arc, but the distance between the middle point of the upper right side and the wall plate 7 is different, so that the transverse inclination angle of the stay cable is adapted, as shown in fig. 6, one side of each web 3 is welded with the top plate 2 in a penetration manner, the other side of each web 3 is welded with the wall plate 7 in a penetration manner, and the vertical component force of the stay cable 11 is transmitted to the concrete tower column 10 through the tower wall connecting piece.
The bearing plates 4 are trapezoidal plates, the bearing plates 4 are arranged in parallel and are perpendicular to the web 3, the top plate 2 and the web 3 are welded in a penetration mode, and the bearing plates 4, the web 3 and the top plate 2 form an open box-shaped structure together so far to transmit axial force of the inhaul cable.
The two pressure-bearing plate stiffening plates 5 are perpendicular to the pressure-bearing plate 4 and the top plate 2 and parallel to the web plate 3, are arranged in the middle of the pressure-bearing plate 4 as shown in fig. 10, and are welded with the pressure-bearing plate 4 and the top plate 2 at the same time as the rectangular plate with a notch, so that only the local stiffening function of the pressure-bearing plate 4 is provided; the other square plate is irregular, one side of the other square plate is welded with the wall plate 7, the other side of the other square plate is welded with the pressure bearing plate 4, and the other side of the other square plate is welded with the top plate 2, so that the local stiffening effect of the pressure bearing plate 4 is provided, and the transmission of the vertical shearing force of the inhaul cable is participated.
The web stiffening plates 6 are divided into two rectangular plates with the same size and shape, are perpendicular to the web 3 and the top plate 2, are parallel to each other, correspond to the pressure bearing plates 4 in position as shown in fig. 5, are welded with the web 3 and the top plate 2 at one side, and only provide local stiffening effect for the web 3.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A stay cable steel tooth block anchoring structure is characterized by comprising a tower wall connecting piece pre-buried in the inner side wall of a concrete tower column and a steel anchoring tooth block fixed with the tower wall connecting piece; the tower wall connecting piece comprises a wall plate close to the inner side wall of the concrete tower column; the steel anchoring tooth block comprises two webs which are parallel and similar to each other, a top plate fixedly arranged above the webs in an inclined mode, an anchor backing plate fixedly arranged above the top plate in an inclined mode, and two pressure bearing plates which are parallel to each other and vertically fixedly arranged between the two webs; the two webs are welded and fixed with the wall plate in an inclined mode, and the vertical distances between the middle points of the right side edges of the two webs and the wall plate are different; the stay cable sequentially penetrates through the concrete tower column, the top plate and the anchor backing plate; the pressure bearing plate, the web plate, the top plate and the wall plate form a closed box-shaped structure, or the pressure bearing plate, the web plate and the top plate form an open box-shaped structure.
2. The stay cable steel tooth block anchoring structure according to claim 1, wherein the web is pentagonal, the web is fusion-welded to the top plate, and the web is fusion-welded to the wall plate; the pressure bearing plates are fixedly connected with the top plate, the web plate and the wall plate to form the closed box-shaped structure for transmitting the axial force of the inhaul cable.
3. The stay cable steel tooth block anchoring structure according to claim 1, wherein the web is arranged in an irregular hexagon, and a corner of the irregular hexagon is in arc transition; the web plate is welded with the top plate in a penetration mode, and the web plate is welded with the wall plate in a penetration mode; the pressure bearing plates are fixedly connected with the top plate and the web plate to form the open box-shaped structure for transmitting the axial force of the inhaul cable.
4. The cable-stayed steel tooth block anchoring structure according to claim 1, wherein the steel anchoring tooth block further comprises two pressure-bearing plate stiffening plates parallel to each other and two web plate stiffening plates parallel to each other; the pressure-bearing stiffening plates are perpendicular to the pressure-bearing plates and the top plate and are parallel to the web plate; the two web stiffening plates are rectangular plates and are perpendicular to the web plate and the top plate.
5. A stay cable steel tooth block anchoring structure according to claim 4, wherein two of said pressure-bearing stiffening plates are located in the middle of said pressure-bearing plates; the two pressure-bearing stiffening plates are a first stiffening plate and a second stiffening plate, the first stiffening plate is a rectangular plate with a notch, and the first stiffening plate is fixedly connected with the pressure-bearing plate and the top plate to locally stiffen the pressure-bearing plate; the second stiffening plate is a trapezoid plate, and the second stiffening plate is connected with the wall plate, the bearing plate and the top plate.
6. The stay cable steel tooth block anchoring structure according to claim 4, wherein the web stiffening plate corresponds to the bearing plate in position, and the web stiffening plate is connected with the web and the top plate.
7. The structure of claim 1, wherein the centers of the anchor backing plate and the top plate are both provided with through holes matching the specifications of the stay cable, the through hole in the anchor backing plate is a first through hole, the through hole in the top plate is a second through hole, and the stay cable sequentially passes through the second through hole and the first through hole; the pull cable is perpendicular to the anchor backing plate, and the pull cable is perpendicular to the top plate; the first through hole and the second through hole are coaxially arranged, and the peripheries of the first through hole and the second through hole are polished and tightly pressed and then are subjected to girth welding.
8. The stay cable steel tooth block anchoring structure according to claim 1, wherein the pylon wall connection member further comprises a PBL perforated plate, a stud; the PBL perforated plate is arranged in a T shape and is connected with the wall plate; the peg is connected to the wall panel.
9. The stay cable steel tooth block anchoring structure according to claim 1, wherein a group of the stay cable steel anchoring tooth block structures are respectively arranged on the side span and the mid-span side of the inner cavity of the concrete tower column; and the stay cable steel anchoring tooth block structure comprises a plurality of steel anchoring tooth blocks.
10. A construction method of a stay cable steel tooth block anchoring structure according to any one of claims 1 to 9, comprising the steps of:
the method comprises the following steps: the steel anchoring tooth block is welded in a factory for one-time manufacturing and forming;
step two: pouring the concrete tower column, wherein the tower wall connecting piece is buried into the side wall of the concrete tower column in the concrete tower column pouring process; the wall plate is abutted against the inner side wall of the concrete tower column, and the wall plate can be used as a part of a construction template in the concrete tower column pouring process, so that the number of the construction templates is reduced;
step three: accurately positioning and welding the steel anchoring tooth blocks one by one on the surface of the wall plate of the tower wall connecting piece; and then hoisting and installing the stay cable steel anchoring tooth block structures in place in groups according to the concrete tower column pouring sequence on site, or hoisting a plurality of steel anchoring tooth blocks in place at one time according to the concrete tower column construction condition.
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| CN113802468A (en) * | 2021-11-01 | 2021-12-17 | 中天交通建设投资集团有限公司 | Asymmetric cable-stayed bridge special-shaped concrete tower column construction process |
| CN115351447A (en) * | 2022-09-15 | 2022-11-18 | 中国五冶集团有限公司 | Welding forming method for cable tower steel anchor box |
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| CN115351447B (en) * | 2022-09-15 | 2024-01-23 | 中国五冶集团有限公司 | Welding forming method for cable tower steel anchor box |
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| CN113356053B (en) | 2022-08-02 |
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