CN114457670B - Rotary anchoring main cable ground anchor type suspension bridge and construction method - Google Patents
Rotary anchoring main cable ground anchor type suspension bridge and construction method Download PDFInfo
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- CN114457670B CN114457670B CN202210181755.0A CN202210181755A CN114457670B CN 114457670 B CN114457670 B CN 114457670B CN 202210181755 A CN202210181755 A CN 202210181755A CN 114457670 B CN114457670 B CN 114457670B
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- 238000004873 anchoring Methods 0.000 title claims abstract description 86
- 239000000725 suspension Substances 0.000 title claims abstract description 43
- 238000010276 construction Methods 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 5
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 11
- 239000007769 metal material Substances 0.000 description 5
- 239000000956 alloy Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a rotary anchoring main cable ground anchored suspension bridge and a construction method thereof. Because the main cable of the suspension bridge body turns through the main cable turning device and is connected with the anchorage anchoring structure, the rotary anchoring of the main cable is formed, the constant load tension of the main cables at two sides is balanced, only a small amount of variable load tension of the main cable generated by unbalanced load such as vehicle load is born by the anchorage anchoring structure, the stress of the anchorage anchoring structure can be greatly reduced, the consumption of the anchorage anchoring structure and anchorage materials is obviously reduced, and the structural safety and economical efficiency are further improved. Meanwhile, the anchorage anchoring structure is positioned on the surface of the anchorage, so that the anchorage anchoring structure is convenient to check and maintain.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a rotary anchoring main cable ground anchor type suspension bridge and a construction method thereof.
Background
At present, an anchor of a ground anchor type suspension bridge is separated from a stiffening girder, the tension of a main cable is transmitted to the ground through the anchor, and the stiffening girder does not bear the tension of the main cable. The main cables are main bearing members of the ground anchor type suspension bridge, and are respectively arranged at two sides of the bridge, are respectively anchored on the anchorage structures at the left side and the right side and the tower top anchorage structure, are connected with the anchorage and the bridge tower into a whole and are used for bearing all the loads such as stiffening girder weights and passing vehicles. Because the main cable tension is transmitted to the ground from the anchorage, the ground anchor type suspension bridge is the bridge type with the strongest crossing capacity at present. The main cables at two sides are arranged separately, so that the scale of a single main cable can be reduced, the manufacturing and mounting difficulties of the main cable are reduced, and the main cable is a common adaptive structure of a large-span suspension bridge main cable. The anchorage anchoring structure of the main cable is an important structure for transmitting the tension of the main cable of the ground anchor type suspension bridge to the anchorage.
The main cable anchorage anchoring structure commonly used at present consists of a connecting pull rod and a main cable anchorage anchoring piece poured in the anchorage, wherein a main cable anchor head is connected with the anchorage anchoring piece in the anchorage through the connecting pull rod, so that the anchoring of the main cable on the anchorage is realized. The main cable anchorage anchoring piece poured in the anchorage is generally in the forms of high-strength prestressed steel strands, low-alloy steel and the like. The anchor material at the anchor piece of the main cable is in a unidirectional stress state because the main cable pulling force is transmitted to the anchor through the anchor piece of the main cable, which is not beneficial to the exertion of the performance of the anchor material and the stress of the anchor, and can not reach the inside of the anchor to maintain the anchor piece.
Disclosure of Invention
The technical problem to be solved by the invention is that the main cable tension is transmitted to the anchor through the main cable anchor anchoring piece, so that the anchor material at the main cable anchor anchoring piece is in a unidirectional stress state, the performance of the anchor material and the stress of the anchor are not facilitated, and the anchor anchoring piece cannot be maintained in the anchor.
In order to solve the technical problems, the invention provides a rotary anchoring main cable ground anchor type suspension bridge, which comprises a suspension bridge body, a main cable steering device and an anchor anchoring structure, wherein the main cable steering device and the anchor anchoring structure are arranged on an anchor of the suspension bridge body, and main cables on the left side and the right side of the suspension bridge body are steered by the main cable steering device and are respectively connected with the anchor anchoring structure.
Further, the anchorage anchoring structure comprises an anchoring body, a connecting cylinder and a limiting pin, wherein a clamping groove for accommodating the connecting cylinder is formed in the anchoring body, the connecting cylinder is arranged in the clamping groove, limiting holes are formed in two sides of the clamping groove, and the limiting pin is inserted into the limiting hole to limit the connecting cylinder to be separated from the clamping groove.
Further, through holes matched with the cable diameter of the main cable are formed in two ends of the connecting cylinder, a containing cavity is formed in the center of the connecting cylinder and used for containing the anchor head of the main cable, and the connecting cylinder is symmetrically divided into two parts in the axial direction.
Further, an embedded part is arranged on the anchorage, and the anchoring body is fixed on the anchorage through the embedded part.
Further, the main cable steering device comprises a steering piece and supporting blocks, wherein the supporting blocks are arc-shaped and symmetrically arranged at two corners of the anchorage, sliding grooves are formed in the supporting blocks, and the bottoms of the steering piece are matched with the sliding grooves and are movably connected with the sliding grooves.
Further, a groove for installing the main cable is formed in the steering piece.
Further, the stiffening girder of the suspension bridge body is erected on the two anchors, and a supporting body is arranged between the anchors and the stiffening girder.
Further, a gap is reserved between the stiffening girder and the anchorage.
Further, the suspension bridge body comprises at least one bridge tower, the main cable is connected with an overhead anchoring structure of the bridge tower, and a suspender is arranged between one or more positions on the main cable and the stiffening beam.
The invention also provides a construction method of the rotary anchoring main cable ground anchor type suspension bridge, which comprises the following specific steps:
(1) Determining the position of an anchorage and a bridge tower according to a design drawing and a construction lofting, and manually or mechanically excavating an anchorage and a bridge tower foundation on a ground foundation;
(2) Binding reinforcing steel bars after excavation is completed, installing embedded parts of the anchorage, embedding supporting blocks at two sides of the anchorage, and pouring reinforced concrete to manufacture the anchorage and a bridge tower;
(3) After the concrete reaches the design age, installing the steering part on the supporting block, fixing the anchoring body on the embedded part, and fixing the tower top anchoring structure on the top of the bridge tower;
(4) The main cables at two sides of the suspension bridge are respectively led into a tower top anchoring structure and two steering parts of the anchorage, and the main cables are horizontally steered to an anchoring body in the center of the anchorage through the steering parts;
(5) The anchor heads of the two main cables are respectively put into one part of the connecting cylinder, and the other part is covered;
(6) The connecting cylinder and the main cable are placed in a clamping groove of the anchoring body, and a limiting pin is arranged in a limiting hole to fix the connecting cylinder;
(7) And installing a supporting body, a suspender and a stiffening girder, leaving a gap between the stiffening girder and an anchor, and constructing auxiliary facilities such as bridge deck pavement, guardrails and the like.
The technical scheme of the invention has the following advantages: because the main cable of the suspension bridge body is turned through the main cable turning device and is connected with the anchorage anchoring structure, the rotary anchoring of the main cable is formed, the constant load pulling force of the main cables at two sides is balanced, only a small amount of variable load main cable pulling force generated by unbalanced load such as vehicle load is born by the anchorage anchoring structure, the stress of the anchorage anchoring structure can be greatly reduced, the consumption of the anchorage anchoring structure and anchorage materials is obviously reduced, and the structural safety and economical efficiency are further improved;
the anchor is surrounded by the main cable which is rotationally anchored, the tension of the main cable is converted into confining pressure for the anchor through the anchor anchoring structure and the main cable steering device, the characteristic of high compressive strength of the concrete material can be effectively utilized, and the stress of the anchor is improved;
meanwhile, the anchorage anchoring structure and the main cable steering device are arranged outside the anchorage, so that the anchorage anchoring structure is convenient to check and maintain, the anchorage anchoring structure can be seen, reached and overhauled, and the durability of the anchorage anchoring structure is improved.
Drawings
FIG. 1 is a schematic diagram of a rotary anchored main cable ground anchored suspension bridge according to the present invention;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a schematic view of a main cable steering device and anchorage anchor;
FIG. 4 is a schematic view in section A-A of FIG. 3;
FIG. 5 is a schematic perspective view of a connecting cylinder;
in the figure: 1. a main cable steering device; 2. an anchorage anchoring structure; 3. anchoring; 4. a main cable; 20. an anchor; 21. a connecting cylinder; 22. a limiting pin; 200. a clamping groove; 201. a limiting hole; 210. a receiving chamber; 40 anchor heads; 23. an embedded part; 10. a steering member; 11. a support block; 110. a chute; 100. a groove; 5. a stiffening beam; 6. a support body; 7. a gap; 8. a bridge tower; 80. an overhead anchor structure; 9. and (5) hanging rods.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In an embodiment, a rotary anchoring main cable ground anchored suspension bridge is provided, as shown in fig. 1 and 2, the rotary anchoring main cable ground anchored suspension bridge comprises a suspension bridge body, a main cable steering device 1 and an anchorage anchoring structure 2, wherein the main cable steering device 1 and the anchorage anchoring structure 2 are arranged on an anchorage 3 of the suspension bridge body, and main cables 4 on two sides of the suspension bridge body are steered by the main cable steering device 1 and are respectively connected with the anchorage anchoring structure 2.
Because the main cable 4 finishes 60-90 degrees of rotation through the main cable steering device 1, the axis of the main cable 4 is changed from the forward direction to the transverse direction at the anchor 3, the main cable 4 is connected with the anchor anchoring structure 2 to form the anchoring of the main cable 4, the main cable 4 pulling force generated by the constant-load equal-symmetrical load is balanced, and the small main cable 4 pulling force generated by the vehicle load and the like is borne by the anchor anchoring structure 2. At this time, the anchorage 3 is in the three-way pressure surrounding of the main cable 4 of the rotary anchorage, the main cable 4 pull force passes through the anchorage anchoring structure 2 in the center of the anchorage 3 and the main cable steering devices 1 on two sides to apply pressure in three directions to the anchorage 3 made of reinforced concrete, so that the characteristic of high compressive strength of reinforced concrete materials can be effectively utilized, the stress of the anchorage 3 is improved, the material consumption of the anchorage anchoring structure 2 and the anchorage 3 is obviously reduced, and further the structural safety and economical efficiency are improved.
Meanwhile, the main cable anchoring piece of the existing ground anchor type suspension bridge is poured inside the anchorage 3, once the anchor is built, the anchor cannot reach inspection, hidden dangers such as corrosion and the like are difficult to discover in time, maintenance is difficult, and safety and durability of a bridge structure are not facilitated. The anchorage structure 2 and the main cable steering device 1 of the embodiment are arranged outside the anchorage 3, so that the anchorage 3 is convenient to inspect and maintain, the anchorage structure 2 is visible, reachable and overhaulable, and the durability of the anchorage structure 2 is improved.
In some embodiments, as shown in fig. 3 and 4, the anchorage anchoring structure 2 includes an anchor body 20, a connecting cylinder 21, and a limiting pin 22. The anchoring body 20 can be made of concrete, can be added with supports such as steel bars and the like to improve the strength, and can also be integrally made of metal materials. The anchor body 20 is arranged at the center of the end face of the anchorage 3, so that the distances between the two main cables 4 and the anchorage anchoring structure 2 are the same, and the anchorage 3 is ensured to bear even force from two sides.
The anchoring body 20 is provided with a clamping groove 200 for accommodating the connecting cylinder 21, and two sides of the clamping groove 200 are also provided with openings for the main cable 4 to pass through so as to facilitate the placement of the main cable 4. The connecting cylinder 21 is used for connecting the anchor heads 40 of the two main cables 4, and it is specifically described that if the anchor heads 40 of the two main cables 4 are formed into hook shapes, the anchor heads 40 of the two main cables 4 are connected by fastening with each other, the connecting cylinder 21 may be omitted, which is also included in the disclosure of the present embodiment.
The connecting cylinder 21 is disposed in the clamping groove 200, in order to limit the connecting cylinder 21 and prevent the connecting cylinder 21 from being separated from the clamping groove 200, limiting holes 201 are formed on two sides of the clamping groove 200, and limiting pins 22 are inserted into the limiting holes 201 to clamp the connecting cylinder 21 in the clamping groove 200, and the number of the limiting holes 201 and the limiting pins 22 is matched and can be increased or decreased according to practical situations. The manner of restricting the connecting tube 21 is not limited to the cooperation of the limiting pin 22 and the limiting hole 201, and other fixing or limiting manners may be adopted, which are conventional technical means in the art, and are not specifically described herein.
In some embodiments, as shown in fig. 5, through holes matched with the cable diameter of the main cable 4 are provided at two ends of the connecting cylinder 21, for accommodating the main cable 4, an accommodating cavity 210 is provided at the center of the connecting cylinder 21, the accommodating cavity 210 is used for accommodating the anchor head 40 of the main cable 4, when the anchor head 40 of the main cable 4 is placed in the accommodating cavity 210, the inner surface of the accommodating cavity 210 abuts against the end surface of the anchor head 40 of the main cable 4, so as to prevent the anchor head 40 of the main cable 4 from being separated from the connecting cylinder 21, and realize connection between the main cable 4 and the connecting cylinder 21. Wherein the connecting cylinder 21 is divided into two parts symmetrically in the axial direction for facilitating the combined installation of the connecting cylinder 21, and can be disassembled up and down. The connecting cylinder 21 may be made of a metal material or an alloy material, such as steel.
In some embodiments, as shown in fig. 4, the anchor 3 is provided with an embedded part 23, and the anchor body 20 is fixed on the anchor 3 through the embedded part 23, so that the adhesion strength of the anchor body 20 to the anchor 3 can be improved, and the anchor body 20 is more tightly connected with the anchor 3.
In some embodiments, as shown in fig. 3, the main cable steering device 1 includes a steering member 10 and a supporting block 11, where the supporting block 11 is arc-shaped and symmetrically disposed at two corners of the anchorage 3. The supporting block 11 may be made of a metal material or an alloy material, such as steel. The supporting block 11 can be connected with the anchorage 3 in a partially embedded manner.
The supporting block 11 is provided with a chute 110, and the bottom of the steering member 10 is matched with the chute 110 and is movably connected with the chute 110. The steering member 10 may be made of a metal material or an alloy material, such as steel, and grease may be applied between the steering member 10 and the supporting block 11 for lubrication. Because the supporting block 11 is arc-shaped, the bottom of the steering member 10 can be adjusted in a small arc relative to the chute 110, and meanwhile, the rotation track of the steering member 10 and the pulling direction of the main cable 4 are located in the same plane, so as to adapt to the length change of the main cable 4 and reduce the friction to the main cable 4.
In some embodiments, as shown in fig. 3, the steering member 10 is provided with a groove 100 for installing the main cable 4, and the main cable 4 is embedded in the groove 100, so as to avoid the main cable 4 from jumping out of position on the steering member 10.
In some embodiments, as shown in fig. 1 and 2, the stiffening beams 5 of the suspension bridge body are erected on the two anchors 3, and a supporting body 6 is arranged between the anchors 3 and the stiffening beams 5, the supporting body 6 can be made of a metal material or an organic material or a combination of the two materials, such as steel materials and rubber, the supporting body 6 is fixedly connected with the anchors 3, and the stiffening beams 5 can slide relatively in the horizontal direction by the supporting body.
In some embodiments, as shown in fig. 1 and 2, a gap 7 is left between the stiffening beam 5 and the anchorage 3, so as to adapt to the elongation and shortening changes of the length of the stiffening beam caused by temperature changes and the like.
In some embodiments, as shown in fig. 1 and 2, the suspension bridge body includes at least one bridge tower 8, but is not limited to the number limitation in the drawings of this embodiment, there may be multiple bridge towers 8, and the design of one bridge tower 8 or multiple bridge towers 8 is a conventional technical means in the prior art, and needs to be determined according to factors such as bridge span, and the function and principle thereof will not be described in detail herein. The main cable 4 is connected with the tower top anchoring structure 80 of the bridge tower 8, and the tower top anchoring structure 80 can be directly applied to the anchoring structure in the prior art. A boom 9 is arranged between one or more positions on the main cable 4 and the stiffening girder 5, and the stiffening girder 5 is suspended by the boom 9 to form a combined system with the main cable 4 so as to reduce deflection deformation caused by load.
The construction method of the rotary anchoring main cable ground anchor type suspension bridge comprises the following specific steps:
(1) Determining the positions of the anchorage 3 and the bridge tower 8 according to the design drawing and the construction lofting, and manually or mechanically excavating the foundations of the anchorage 3 and the bridge tower 8 on the ground foundation;
(2) Binding reinforcing steel bars after excavation is completed, installing embedded parts 23 of the anchorage 3, embedding supporting blocks 11 on two sides of the anchorage 3, and pouring reinforced concrete to manufacture the anchorage 3 and the bridge tower 8;
(3) After the concrete reaches the design age, the steering member 10 is installed on the supporting block 11, the anchoring body 20 is fixed on the embedded member 23, and the tower top anchoring structure 80 is fixed on the top of the bridge tower 8;
(4) The main cables 4 at two sides of the suspension bridge are respectively led into the steering members 10 at two corners of the tower top anchoring structure 80 and the anchorage 3, and the main cables 4 are horizontally steered to the anchoring body 20 at the center of the anchorage 3 through the steering members 10;
(5) The anchor heads 40 of the two main cables 4 are respectively put into one part of the connecting cylinders 21, and the other part is covered;
(6) The connecting cylinder 21 and the main cable 4 are placed in the clamping groove 200 of the anchoring body 20, and the limiting pin 22 is arranged in the limiting hole 201 to fix the connecting cylinder 21;
(7) And a supporting body 6, a suspender 9 and a stiffening girder 5 are arranged, a gap 7 is reserved between the stiffening girder 5 and the anchorage 3, and auxiliary facilities such as bridge deck pavement, guardrails and the like are constructed.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (7)
1. The rotary anchoring main cable ground anchor type suspension bridge is characterized by comprising a suspension bridge body, a main cable steering device and an anchor anchoring structure, wherein the main cable steering device and the anchor anchoring structure are arranged on an anchor of the suspension bridge body, and main cables at two sides of the suspension bridge body are steered by the main cable steering device and are respectively connected with the anchor anchoring structure; the anchorage anchoring structure comprises an anchoring body, a connecting cylinder and a limiting pin, wherein a clamping groove for accommodating the connecting cylinder is formed in the anchoring body, the connecting cylinder is arranged in the clamping groove, limiting holes are formed in two sides of the clamping groove, and the limiting pin is inserted into the limiting hole to limit the connecting cylinder to be separated from the clamping groove; the two ends of the connecting cylinder are provided with through holes matched with the cable diameter of the main cable, the center of the connecting cylinder is provided with a containing cavity, the containing cavity is used for containing the anchor head of the main cable, and the connecting cylinder is symmetrically divided into two parts by the axial direction; the anchor is characterized in that an embedded part is arranged on the anchor, and the anchor body is fixed on the anchor through the embedded part.
2. The rotary anchoring main cable ground anchor suspension bridge according to claim 1, wherein the main cable steering device comprises a steering piece and supporting blocks, the supporting blocks are arc-shaped and symmetrically arranged at two corners of the anchorage, sliding grooves are formed in the supporting blocks, and the bottoms of the steering piece are matched with the sliding grooves and are movably connected with the sliding grooves.
3. A rotary anchored main cable-ground anchored suspension bridge as in claim 2, wherein said steering member is provided with a groove for installation of the main cable.
4. A rotary anchoring main cable ground anchor type suspension bridge as claimed in any one of claims 1 to 3, wherein the stiffening girder of the suspension bridge body is erected on two anchors, and a supporting body is arranged between the anchors and the stiffening girder.
5. The main cable ground anchor type suspension bridge of claim 4, wherein a gap is reserved between the stiffening girder and the anchorage.
6. The rotary anchored main cable-to-ground anchored suspension bridge of claim 5, wherein said suspension bridge body comprises at least one bridge tower, said main cable is connected to the tower top anchoring structure of said bridge tower, and hanger rods are disposed between one or more of said main cable and said stiffening beams.
7. The construction method of the rotary anchoring main cable ground anchor type suspension bridge is characterized by comprising the following specific steps:
(1) Determining the position of an anchorage and a bridge tower according to a design drawing and a construction lofting, and manually or mechanically excavating an anchorage and a bridge tower foundation on a ground foundation;
(2) Binding steel bars after excavation is completed, installing anchor body embedded parts of the anchorage, embedding supporting blocks at two sides of the anchorage, and pouring reinforced concrete to manufacture the anchorage and the bridge tower;
(3) After the concrete reaches the design age, installing the steering part on the supporting block, fixing the anchoring body on the embedded part, and fixing the tower top anchoring structure on the top of the bridge tower;
(4) The main cables at two sides of the suspension bridge are respectively led into a tower top anchoring structure and two steering parts of the anchorage, and the main cables are horizontally steered to an anchoring body in the center of the anchorage through the steering parts;
(5) The anchor heads of the two main cables are respectively put into one part of the connecting cylinder, and the other part of the connecting cylinder is covered, so that the anchor heads of the main cables are ensured to be accommodated in the accommodating cavity in the center of the connecting cylinder;
(6) The anchor body is provided with a clamping groove for accommodating the connecting cylinder, the connecting cylinder and the main cable are arranged in the clamping groove of the anchor body, two sides of the clamping groove are provided with limiting holes, and limiting pins are arranged in the limiting holes to fix the connecting cylinder;
(7) The method comprises the steps of installing a supporting body, ensuring that the supporting body is arranged between the anchors and the stiffening girders, erecting the stiffening girders on the supporting body between the two anchors and the stiffening girders, and leaving a gap between the stiffening girders and the anchors; and then installing a suspender, installing the suspender between one or more positions on the main cable and the stiffening girder, and constructing bridge deck pavement and guardrail auxiliary facilities.
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| CN202210181755.0A CN114457670B (en) | 2022-02-25 | 2022-02-25 | Rotary anchoring main cable ground anchor type suspension bridge and construction method |
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| CN202210181755.0A CN114457670B (en) | 2022-02-25 | 2022-02-25 | Rotary anchoring main cable ground anchor type suspension bridge and construction method |
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| CN114457670A (en) | 2022-05-10 |
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