CN111041984A - Rear anchor surface anchoring system for anchoring main cable of suspension bridge - Google Patents
Rear anchor surface anchoring system for anchoring main cable of suspension bridge Download PDFInfo
- Publication number
- CN111041984A CN111041984A CN201911209818.3A CN201911209818A CN111041984A CN 111041984 A CN111041984 A CN 111041984A CN 201911209818 A CN201911209818 A CN 201911209818A CN 111041984 A CN111041984 A CN 111041984A
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- Prior art keywords
- gasket
- anchor
- sealing cover
- grease injection
- main
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004873 anchoring Methods 0.000 title claims abstract description 31
- 239000000725 suspension Substances 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 57
- 239000004519 grease Substances 0.000 claims abstract description 37
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- 239000000945 filler Substances 0.000 claims abstract description 7
- 229920002635 polyurethane Polymers 0.000 claims abstract description 7
- 239000004814 polyurethane Substances 0.000 claims abstract description 7
- 238000012856 packing Methods 0.000 claims abstract 4
- 230000007704 transition Effects 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000008719 thickening Effects 0.000 claims description 2
- 239000007795 chemical reaction product Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000008439 repair process Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The rear anchor surface anchoring system for the main cable of the suspension bridge effectively prevents oil leakage at the rear anchor surface of the main cable of the suspension bridge, and is convenient for maintenance and repair of the main cable anchoring system. Including sealed cowling, leak protection oil packing ring, the sealed cowling is by the fastening bolt fixed mounting that circumference interval set up on the rear end face of anchor backing plate, with the work anchor slab in the sealed cowling, leak protection oil packing ring sets up between the rear end face of anchor backing plate and sealed cowling port, characterized by: the oil leakage preventing gasket comprises a main gasket and an auxiliary gasket which are concentrically arranged and have different elastic moduli, and the rear end surface of the anchor gasket is provided with a corresponding annular notch groove of the main gasket and an annular notch groove of the auxiliary gasket, and the port part of the sealing cover presses against the contact surfaces of the main gasket and the auxiliary gasket to form labyrinth seal under the action of the fastening bolt; a reserved grease injection structure communicated with the outside of the sealing cover is arranged in the sealing cover, and a polyurethane filler is injected into a cavity in the sealing cover through the reserved grease injection structure; the sealing cover is of a variable-thickness structure.
Description
Technical Field
The invention relates to a bridge, in particular to a rear anchor surface anchoring system for main cable anchors of a suspension bridge.
Background
The suspension bridge main cable oil filling unbonded prestressed steel strand anchorage anchoring system consists of a front anchorage surface anchoring system, an anchor body intermediate system (steel strands, embedded steel pipes, special anticorrosive grease and the like) and a rear anchorage surface anchoring system.
The traditional rear anchor face anchoring system is composed of a sealing cover and an oil leakage prevention gasket, wherein the sealing cover is fixedly installed on the rear end face of an anchor backing plate through fastening bolts arranged at intervals in the circumferential direction, a working anchor plate is packaged in the sealing cover, the oil leakage prevention gasket is arranged between the rear end face of the anchor backing plate and a port of the sealing cover, and the oil leakage prevention gasket is weak in oil leakage resistance and causes troubles for later maintenance and repair. Moreover, the sealing cover is usually of an equal-thickness cylindrical structure and has poor pressure bearing capacity.
Disclosure of Invention
The invention aims to solve the technical problem of providing a suspension bridge main cable anchorage rear anchor surface anchoring system, so as to effectively prevent oil leakage at the rear anchor surface of the suspension bridge main cable anchorage and facilitate maintenance of the main cable anchorage anchoring system.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention discloses a rear anchor surface anchoring system for anchoring a main cable of a suspension bridge, which comprises a sealing cover and an oil leakage prevention gasket, wherein the sealing cover is fixedly arranged on the rear end surface of an anchor backing plate by fastening bolts arranged at intervals in the circumferential direction, a working anchor plate is arranged in the sealing cover, and the oil leakage prevention gasket is arranged between the rear end surface of the anchor backing plate and a port of the sealing cover, and is characterized in that: the oil leakage preventing gasket comprises a main gasket and an auxiliary gasket which are concentrically arranged and have different elastic moduli, and the rear end surface of the anchor gasket is provided with a corresponding annular notch groove of the main gasket and an annular notch groove of the auxiliary gasket, and the port part of the sealing cover presses against the contact surfaces of the main gasket and the auxiliary gasket to form labyrinth seal under the action of the fastening bolt; a reserved grease injection structure communicated with the outside of the sealing cover is arranged in the sealing cover, and a polyurethane filler is injected into a cavity in the sealing cover through the reserved grease injection structure; the sealing cover is of a variable-thickness structure.
The sealing cover is provided with a ball shell part and an annular base, a thickening transition section is arranged between the ball shell part and the annular base, and an annular flange corresponding to the annular notch of the main gasket is arranged on the bottom surface of the annular base.
The reserved grease injection structure comprises a first grease injection hole and a second grease injection hole, the first grease injection hole penetrates through the front plate surface and the rear plate surface of the working anchor plate, the second grease injection hole is arranged in the anchor backing plate, the rear port of the second grease injection hole is in butt joint with the inner port of the first grease injection hole, and the front port of the second grease injection hole is located outside the sealing cover and is sealed by a sealing bolt arranged on the sealing cover.
The invention has the advantages that the main gasket and the auxiliary gasket which form labyrinth seal are arranged between the rear end surface of the anchor backing plate and the port of the seal cover, and a polyurethane filler is injected into the cavity in the seal cover to reserve a grease injection structure, so that the oil leakage prevention of the anchor surface anchoring system after the suspension bridge is anchored is reliably guaranteed; the sealing cover is of a variable-thickness structure, so that the pressure bearing capacity of the sealing cover is effectively improved; the main cable anchorage system has the advantages of reasonable structure and reliable sealing performance, and is convenient for maintenance and repair of the main cable anchorage system.
Drawings
The specification includes the following six figures:
fig. 1 is a schematic structural diagram of an anchor surface anchoring system after the anchorage of a main cable of a conventional suspension bridge;
FIG. 2 is a schematic structural view of an anchoring system of the rear anchor face of the suspension bridge main cable anchorage of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is an enlarged view taken along line B of FIG. 2;
FIG. 5 is an enlarged view of a partial structure of a working anchor plate in the rear anchor face anchoring system of the suspension bridge main cable of the present invention;
fig. 6 is a sectional view of a seal cover in the anchor surface anchoring system after the main cable anchorage of the suspension bridge of the present invention.
The figures show the components and corresponding references: the anchor backing plate comprises an anchor backing plate 1, a working anchor plate 2, a sealing cover 3, a spherical shell part 3a, an annular base 3b, a thickened transition section 3c, an annular flange 3d, a polyurethane filler 4, a main gasket 5, a main gasket annular notch groove 5a, an auxiliary gasket 6, an auxiliary gasket annular notch groove 6b, a fastening bolt 7, a bolt gasket 8, a sealing bolt 10, a sealing gasket 11, a first grease injection hole 12a, a second grease injection hole 12b, an anchoring system reinforcing steel bar 13, a pre-buried pipe 14, a prestressed steel bundle 15 and special anticorrosive grease 16.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural diagram of an anchor surface anchoring system after anchoring a main cable of an existing suspension bridge, the traditional anchor surface anchoring system comprises a sealing cover 3 and an oil leakage prevention gasket, the sealing cover 3 is fixedly installed on the rear end face of an anchor backing plate 1 through fastening bolts 7 arranged at intervals in the circumferential direction, a working anchor plate 2 is packaged in the sealing cover 3, the oil leakage prevention gasket is arranged between the rear end face of the anchor backing plate 1 and a port of the sealing cover 3, and the oil leakage prevention gasket has the defects of poor oil and grease leakage resistance and is troublesome for later maintenance. Moreover, the sealing cover 3 is generally in a cylindrical structure with the same thickness, and the pressure bearing capacity is poor.
Referring to fig. 2, 3, 4 and 5, the rear anchor surface anchoring system for the main cable anchorage of the suspension bridge comprises a sealing cover 3 and an oil leakage prevention gasket, wherein the sealing cover 3 is fixedly arranged on the rear end surface of an anchor backing plate 1 by fastening bolts 7 arranged at intervals in the circumferential direction, a working anchor plate 2 is arranged in the sealing cover 3, and the oil leakage prevention gasket is arranged between the rear end surface of the anchor backing plate 1 and a port of the sealing cover 3. The oil leakage preventing gasket comprises a main gasket 5 and an auxiliary gasket 6 which are concentrically arranged and have different elastic moduli, and the rear end surface of the anchor gasket 1 is provided with a corresponding main gasket annular notch 5a and an auxiliary gasket annular notch 6b, and the port part of the seal cover 3 presses the contact surfaces of the main gasket 5 and the auxiliary gasket 6 to form labyrinth seal under the action of a fastening bolt 7; a reserved grease injection structure communicated with the outside of the sealing cover 3 is arranged in the sealing cover 3, and a polyurethane filler 4 is injected into a cavity in the sealing cover 3 through the reserved filling structure.
According to the invention, the main gasket 5 and the auxiliary gasket 6 which form labyrinth seal are arranged between the rear end face of the anchor backing plate 1 and the port of the seal cover 3, and the reserved grease injection structure for injecting the polyurethane filler 4 into the cavity in the seal cover 3 is arranged, so that reliable guarantee is provided for oil leakage prevention of the anchor face anchoring system after the suspension bridge is anchored. The sealing cover 3 adopts a variable-thickness structure, and the pressure bearing capacity of the sealing cover is effectively improved. The rear anchor surface anchoring system is reasonable in structure and reliable in sealing performance, and maintenance and repair of the main cable anchorage anchoring system are facilitated.
Referring to fig. 6, the sealing cap 3 has a ball shell portion 3a and an annular base 3b, a thickened transition section 3c is arranged between the ball shell portion 3a and the annular base 3b, an annular flange 3d corresponding to the annular notch 5a of the main gasket is arranged on the bottom surface of the annular base 3b, and the annular flange bottom surface 3d is pressed against the main gasket 5, so that the main gasket is elastically deformed sufficiently, and the sealing effect is ensured.
Referring to fig. 4, the reserved grease injection structure includes a first grease injection hole 12a and a second grease injection hole 12b, the first grease injection hole 12a penetrates through the front and rear plate surfaces of the working anchor plate 2, the second grease injection hole 12b is arranged in the anchor backing plate 1, the rear port of the second grease injection hole 12b is in butt joint with the inner end of the first grease injection hole 12a, and the front port of the second grease injection hole 12b is located outside the sealing cover 3 and is sealed by a sealing bolt 10 mounted thereon.
The foregoing is illustrative of the principles of the suspension bridge main cable post anchor surface anchoring system of the present invention and is not intended to limit the invention to the exact construction and application shown and described, and accordingly, all modifications and equivalents thereof which may be resorted to are intended to fall within the scope of the invention.
Claims (3)
1. Suspension bridge main push-towing rope anchorage back anchor face anchor system, including sealed cowling (3) and leak protection oil packing ring, sealed cowling (3) are by fastening bolt (7) fixed mounting that circumference interval set up on the rear end face of anchor backing plate (1), with work anchor slab (2) in sealed cowling (3), leak protection oil packing ring sets up between the rear end face of anchor backing plate (1) and sealed cowling (3) port, characterized by: the oil leakage preventing gasket comprises a main gasket (5) and an auxiliary gasket (6) which are concentrically arranged and have different elastic moduli, corresponding main gasket annular notches (5a) and auxiliary gasket annular notches (6b) are arranged on the rear end face of the anchor gasket (1), and the port part of the sealing cover (3) is in labyrinth seal by pressing the main gasket (5) and the auxiliary gasket (6) contact surface through a fastening bolt (7); a reserved grease injection structure leading to the outside of the sealing cover (3) is arranged in the sealing cover (3), and a polyurethane filler (4) is injected into a cavity in the sealing cover (3) through the reserved filling structure; the sealing cover (3) is of a variable-thickness structure.
2. The suspension bridge main cable post-anchor surface anchoring system of claim 1, characterized by: the sealing cover (3) is provided with a ball shell part (3a) and an annular base (3b), a thickening transition section (3c) is arranged between the ball shell part (3a) and the annular base (3b), and an annular flange (3d) corresponding to the annular notch groove (5a) of the main gasket is arranged on the bottom surface of the annular base (3 b).
3. The suspension bridge main cable post-anchor surface anchoring system of claim 1, characterized by: the reserved grease injection structure comprises a first grease injection hole (12a) and a second grease injection hole (12b), wherein the first grease injection hole (12a) penetrates through the front and rear plate surfaces of the working anchor plate (2), the second grease injection hole (12b) is arranged in the anchor backing plate (1), the rear port of the second grease injection hole (12b) is in butt joint with the inner end product of the first grease injection hole (12a), and the front port of the second grease injection hole (12b) is located outside the sealing cover (3) and is sealed by a sealing bolt (10) installed on the sealing cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911209818.3A CN111041984A (en) | 2019-12-01 | 2019-12-01 | Rear anchor surface anchoring system for anchoring main cable of suspension bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911209818.3A CN111041984A (en) | 2019-12-01 | 2019-12-01 | Rear anchor surface anchoring system for anchoring main cable of suspension bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111041984A true CN111041984A (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911209818.3A Pending CN111041984A (en) | 2019-12-01 | 2019-12-01 | Rear anchor surface anchoring system for anchoring main cable of suspension bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111041984A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550555A (en) * | 2020-05-18 | 2020-08-18 | 海盐建浩金属股份有限公司 | Ground tackle protection casing |
| CN114960442A (en) * | 2022-06-07 | 2022-08-30 | 安徽省公路桥梁工程有限公司 | Suspension bridge composite tunnel anchorage grease injection process |
Citations (15)
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| CN2305449Y (en) * | 1997-07-16 | 1999-01-27 | 中外合资柳州欧维姆建筑机械有限公司 | Prestress anchor |
| WO2004094730A1 (en) * | 2003-03-24 | 2004-11-04 | Freyssinet | Construction cable |
| CN201003241Y (en) * | 2007-01-24 | 2008-01-09 | 柳州欧维姆机械股份有限公司 | Anchorage device with seal structure |
| CN201033913Y (en) * | 2007-04-04 | 2008-03-12 | 柳州欧维姆机械股份有限公司 | Anchor head conservation device for ring-anchor without binding bars |
| CN201144393Y (en) * | 2008-01-08 | 2008-11-05 | 中交第二公路勘察设计研究院有限公司 | Replaceable prestressed device for suspension bridge anchor |
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| CN207537886U (en) * | 2017-11-29 | 2018-06-26 | 柳州桂桥缆索有限公司 | It is a kind of can the compound sealing type suspension cable substituted of single steel strand |
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2019
- 2019-12-01 CN CN201911209818.3A patent/CN111041984A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550555A (en) * | 2020-05-18 | 2020-08-18 | 海盐建浩金属股份有限公司 | Ground tackle protection casing |
| CN114960442A (en) * | 2022-06-07 | 2022-08-30 | 安徽省公路桥梁工程有限公司 | Suspension bridge composite tunnel anchorage grease injection process |
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