CN111851293B - A concealed anchoring system for bridge and construction method thereof - Google Patents
A concealed anchoring system for bridge and construction method thereof Download PDFInfo
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- CN111851293B CN111851293B CN202010653769.9A CN202010653769A CN111851293B CN 111851293 B CN111851293 B CN 111851293B CN 202010653769 A CN202010653769 A CN 202010653769A CN 111851293 B CN111851293 B CN 111851293B
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- anchor
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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
- 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
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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
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
本发明适用于桥梁工程技术领域，提供了一种桥梁隐蔽式锚固系统及其施工方法。该锚固系统包括主缆通道以及复合式锚固体，复合式锚固体位于山体远离桥梁的一侧；主缆通道设置在山体内，主缆通过主缆通道伸入复合式锚固体内。本发明的锚固系统整体位于山体内，可利用山体自重提供锚固力，受力可靠且较常规重力式锚固系统造价经济，条件允许时可作为悬索桥锚固系统的一较佳备选方案。
The present invention is applicable to the field of bridge engineering technology, and provides a concealed anchoring system for bridges and a construction method thereof. The anchoring system comprises a main cable channel and a composite anchoring body, wherein the composite anchoring body is located on the side of the mountain away from the bridge; the main cable channel is arranged inside the mountain, and the main cable extends into the composite anchoring body through the main cable channel. The anchoring system of the present invention is located inside the mountain as a whole, and can use the deadweight of the mountain to provide anchoring force. The force is reliable and the cost is more economical than the conventional gravity anchoring system. When conditions permit, it can be used as a better alternative solution for the anchoring system of the suspension bridge.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a hidden anchoring system for a bridge and a construction method thereof.
Background
Suspension bridges, also known as suspension bridges, refer to bridges having cables (or steel chains) suspended by means of cable towers and anchored to both sides (or ends of the bridge) as the main load-bearing members of the superstructure.
The suspension bridge is a bridge structure type which is commonly used at present and spans valleys with larger width, and has attractive appearance. The anchoring system is an important component of the stress of the suspension bridge, and the currently used anchoring type is a gravity anchor and a tunnel anchor.
However, existing anchorage systems are relatively expensive, and for this reason, it is necessary to develop a cost-effective suspension bridge anchorage solution.
Disclosure of Invention
The invention aims to solve the technical problem of higher manufacturing cost of the existing anchoring system.
The bridge hidden type anchoring system comprises a main cable channel and a composite anchoring body, wherein the composite anchoring body is positioned on one side of a mountain body far away from a bridge, the main cable channel is arranged in the mountain body, and a main cable extends into the composite anchoring body through the main cable channel.
The composite anchor body comprises an anchor steel ingot, a reinforced concrete anchor cushion block, a pile foundation and a grouting reinforcement body which are arranged in the mountain body in sequence from one side of the mountain body far away from the bridge to one side close to the bridge, wherein a hole is formed in the middle of the anchor steel ingot, a main cable is fixed by adopting an anchor device and a clamp after penetrating out of the hole, and the anchor steel ingot is wrapped by anchor sealing concrete.
Further, the anchoring steel ingot is cylindrical.
Further, the main cable channel is inclined to the horizontal direction, one end of the bridge close to the bridge is high at the end remote from the bridge.
Furthermore, the main cable channel is constructed in a non-excavation mode by adopting a jacking pipe or a horizontal directional drill, the inner diameter of the main cable channel is larger than the outer diameter of the main cable by 0.5-1.0 m, and micro-expansion concrete is poured into the main cable channel.
Further, the reinforced concrete anchoring cushion block adopts high-strength concrete pouring, and a plurality of layers of stress dispersion steel bars which are transversely and vertically staggered are arranged in the reinforced concrete anchoring cushion block.
Furthermore, the horizontal section and the vertical section of the reinforced concrete anchoring cushion block are both trapezoidal, one end of the reinforced concrete anchoring cushion block, which is close to the anchoring steel ingot, is a small-section end, the end of the reinforced concrete anchoring cushion block, which is close to the pile foundation, is a large-section end, the cross section of the grouting reinforcement body in the plane and the vertical direction is trapezoidal, one end of the reinforced concrete anchoring cushion block, which is close to the pile foundation, is a small-section end, and one end of the reinforced concrete anchoring cushion block, which is far away from the pile foundation, is a large-section end.
Furthermore, the pile foundation is used as a foundation pit supporting structure of the reinforced concrete anchoring cushion block and is used as an important force transmission component, a plurality of rows of prestressed anchor cables are embedded in the pile foundation, extend out of one side of the pile foundation, which is close to a mountain body, and are anchored into the mountain body.
Furthermore, the grouting reinforcement body is reinforced by injecting grout into a steel flowtube, and the grout is cement grout or cement mortar.
The invention provides a construction method of the bridge hidden type anchoring system, which aims to solve the technical problems, and comprises the following steps:
S1, constructing pile foundations and reserving conditions for later-stage main cable channel construction;
s2, grouting reinforcement is constructed, and conditions are reserved for the construction of a main cable duct in the later stage;
S3, excavating a foundation pit, and synchronously applying a plurality of rows of pre-stressed anchor cables;
s4, constructing a main cable passage;
S5, constructing reinforced concrete anchoring cushion blocks and reserving a main cable access channel;
S6, accessing a main cable;
S7, anchoring the main cable at the anchoring steel ingot;
S8, constructing anchor sealing concrete;
s9, pouring main cable channel concrete;
S10, backfilling and earthing the foundation pit, and recovering the foundation pit to the original state.
Compared with the prior art, the invention has the beneficial effects that:
The hidden anchoring system for the bridge and the construction method thereof provided by the invention are characterized in that the whole anchoring system is positioned in a mountain body, the self weight of the mountain body can be utilized to provide anchoring force, the stress is reliable, the cost is lower than that of a conventional gravity type anchoring system, and the hidden anchoring system can be used as a preferable alternative scheme of the suspension bridge anchoring system when the condition allows.
Drawings
FIG. 1 is a schematic elevation view of a hidden anchor system for a bridge according to an embodiment of the present invention;
FIG. 2 is an enlarged view of the anchoring system shown in FIG. 1 in a composite anchor position;
fig. 3 is a schematic plan view of a hidden anchoring system for a bridge according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are merely for convenience of description and to simplify the description based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the apparatus or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention, the terms "first," "second," "third," are used for descriptive purposes only and should not be construed as indicating or implying relative importance, and furthermore, unless explicitly stated or otherwise, the terms "mounted," "connected," or "integrally connected" should be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, or indirectly connected through intermediaries, or communicating between two parts. 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.
Referring to fig. 1 to 3, a hidden anchor system for a bridge according to a preferred embodiment of the present invention includes a main cable channel 1 and a composite anchor body, wherein the composite anchor body is located at a side of a mountain 200 away from the bridge, the main cable channel 1 is disposed in the mountain 200, and the main cable 100 extends into the composite anchor body through the main cable channel 1.
The composite anchor body comprises an anchor steel ingot 2, a reinforced concrete anchor cushion block 3, a pile foundation 4 and a grouting reinforcement body 5 which are arranged in sequence from one side of the mountain body 200 away from the bridge to one side close to the bridge. A hole is formed in the middle of the anchoring steel ingot 2, the main cable 100 is fixed by an anchor and a clamp after penetrating out of the hole, and the anchoring steel ingot 2 is wrapped by the anchor sealing concrete 6. Preferably, the anchoring ingot 2 is cylindrical.
The main cable channel 1 is inclined to the horizontal direction, and the end thereof close to the bridge is higher than the end thereof far from the bridge. The main cable channel 1 is designed to be inclined horizontally, and the composite anchor body can be arranged at the bottom of the mountain 200 as much as possible, so that the self weight of the mountain 200 can be utilized to provide the anchor force to the maximum extent.
The main cable channel 1 is constructed in a non-excavation mode by adopting a jacking pipe or a horizontal directional drill, the inner diameter of the main cable channel 1 is larger than the outer diameter of the main cable 100 by 0.5-1.0 m, and micro-expansion concrete is poured into the main cable channel 1.
The reinforced concrete anchoring cushion block 3 adopts high-strength concrete pouring, and is internally provided with a plurality of layers of stress dispersion steel bars which are arranged in a transverse and vertical staggered manner.
In order to enable the overall shape of the composite anchoring body to be better matched with the slope of a mountain, so as to realize the hidden design of the composite anchoring body, the shapes of the horizontal section and the vertical section of the reinforced concrete anchoring cushion block 3 are trapezoidal, one end, close to the anchoring steel ingot 2, of the reinforced concrete anchoring cushion block is a small-section end, and the end, close to the pile foundation 4, of the reinforced concrete anchoring cushion block is a large-section end. The grouting reinforcement body 5 is trapezoidal in plane and vertical cross section, one end of the grouting reinforcement body, which is close to the pile foundation 4, is a small cross section end, and one end of the grouting reinforcement body, which is far away from the pile foundation 4, is a large cross section end.
The pile foundation 4 is used as a foundation pit supporting structure of the reinforced concrete anchor pad 3 and is also used as an important force transmission component. The pile foundation 4 is internally embedded with a plurality of rows of pre-stress anchor cables 7, and the rows of pre-stress anchor cables 7 extend out of one side of the pile foundation 4, which is close to the mountain 200, and are anchored into the mountain 200.
The grouting reinforcement body 5 is reinforced by injecting grout into a steel flowtube 8, wherein the grout is cement slurry or cement mortar.
The embodiment also provides a construction method of the bridge hidden type anchoring system, which comprises the following steps:
S1, constructing pile foundations 4, and reserving conditions for construction of a later-stage main cable passage 1;
S2, constructing a grouting reinforcement body 5, and reserving conditions for the construction of the later-stage main cable duct 1;
S3, excavating a foundation pit, and synchronously applying a plurality of rows of pre-stressed anchor cables 7;
S4, constructing a main cable passage 1;
s5, constructing a reinforced concrete anchoring cushion block 3, and reserving an access channel of the main cable 100;
s6, accessing the main cable 100;
S7, anchoring the main cable 100 at the anchoring steel ingot 2;
S8, constructing the anchor sealing concrete 6;
s9, pouring concrete of the main cable channel 1;
s10, backfilling the foundation pit with the covering soil 9, and recovering the foundation pit to the original state.
In summary, the hidden anchoring system for the bridge and the construction method thereof according to the present embodiment are provided, wherein the whole anchoring system is located in the mountain 200, the self weight of the mountain can be utilized to provide the anchoring force, the stress is reliable, and the hidden anchoring system is economical compared with the conventional gravity type anchoring system, and the hidden anchoring system can be used as a preferable alternative scheme of the suspension bridge anchoring system when the condition allows.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The hidden type anchoring system for the bridge is characterized by comprising a main cable channel and a composite anchoring body, wherein the composite anchoring body is positioned on one side of a mountain away from the bridge; the combined type anchor comprises an anchor steel ingot, a reinforced concrete anchor cushion block, a pile foundation and a grouting reinforcement body, wherein the anchor steel ingot, the reinforced concrete anchor cushion block, the pile foundation and the grouting reinforcement body are arranged in the mountain in sequence from one side of the mountain far away from a bridge to one side of the mountain near the bridge, a hole is formed in the middle of the anchor steel ingot, the anchor steel ingot is fixed by adopting an anchor and a clamp after penetrating out of the hole, the anchor steel ingot is wrapped by anchor sealing concrete, the horizontal section and the vertical section of the reinforced concrete anchor cushion block are trapezoidal, the end of the reinforced concrete anchor cushion block, which is close to the anchor steel ingot, is a small section end, the end of the grouting reinforcement body, which is close to the pile foundation, is a large section end, the end of the pile foundation, which is far away from the pile foundation, is a large section end, the pile foundation supporting structure, which is used as an important force transmission component, the pile foundation is embedded with prestress anchor cable, and the pile foundation is embedded into one side of the mountain, which is close to the pile foundation pit.
2. The bridge concealed anchoring system according to claim 1, wherein said anchoring steel ingot is cylindrical.
3. The bridge concealed anchor system of claim 1 wherein the main cable passage is inclined to the horizontal with an end closer to the bridge being higher than an end farther from the bridge.
4. The bridge concealed anchoring system of claim 1, wherein the main cable channel is constructed in a trenchless manner by using a jacking pipe or a horizontal directional drill, the inner diameter of the main cable channel is greater than the outer diameter of the main cable by 0.5-1.0 m, and micro-expansion concrete is poured into the main cable channel.
5. The hidden bridge anchoring system of claim 1, wherein the reinforced concrete anchoring pad is poured by high-strength concrete, and a plurality of layers of stress dispersion steel bars are arranged in a staggered manner in the transverse direction and the vertical direction.
6. The bridge concealed anchoring system of claim 1, wherein the grouting reinforcement is reinforced with a steel flowtube injection grout, the grout being a cement grout or a cement grout.
7. A method of constructing a concealed anchoring system for a bridge as claimed in claim 1, the method comprising the steps of:
S1, constructing pile foundations and reserving conditions for later-stage main cable channel construction;
s2, grouting reinforcement is constructed, and conditions are reserved for the construction of a main cable duct in the later stage;
S3, excavating a foundation pit, and synchronously applying a plurality of rows of pre-stressed anchor cables;
s4, constructing a main cable passage;
S5, constructing reinforced concrete anchoring cushion blocks and reserving a main cable access channel;
S6, accessing a main cable;
S7, anchoring the main cable at the anchoring steel ingot;
S8, constructing anchor sealing concrete;
s9, pouring main cable channel concrete;
S10, backfilling and earthing the foundation pit, and recovering the foundation pit to the original state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010653769.9A CN111851293B (en) | 2020-07-08 | 2020-07-08 | A concealed anchoring system for bridge and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010653769.9A CN111851293B (en) | 2020-07-08 | 2020-07-08 | A concealed anchoring system for bridge and construction method thereof |
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| CN111851293A CN111851293A (en) | 2020-10-30 |
| CN111851293B true CN111851293B (en) | 2025-05-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112554056B (en) * | 2020-12-16 | 2022-04-22 | 长江水利委员会长江科学院 | Horizontal anchorage structure of suspension bridge and construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352601A (en) * | 2011-08-15 | 2012-02-15 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel type composite anchorage |
| CN105648921A (en) * | 2016-02-18 | 2016-06-08 | 长江水利委员会长江科学院 | Suspension bridge rock mass and reinforced concrete plate composited type anchorage and construction method thereof |
| CN213114309U (en) * | 2020-07-08 | 2021-05-04 | 深圳市综合交通设计研究院有限公司 | Hidden type bridge anchoring system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590332A (en) * | 2013-11-25 | 2014-02-19 | 中铁第四勘察设计院集团有限公司 | Tunnel type anchorage suitable for soft rock area |
| CN105625174B (en) * | 2016-01-09 | 2017-08-25 | 武汉科技大学 | A kind of appraisal procedure of Techniques of Tunnel-Type Anchorage for Suspension Bridge bearing capacity |
| CN206143608U (en) * | 2016-10-21 | 2017-05-03 | 山西省交通科学研究院 | Assembled T beam bridge hogging moment district anchorage sealing system |
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- 2020-07-08 CN CN202010653769.9A patent/CN111851293B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352601A (en) * | 2011-08-15 | 2012-02-15 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel type composite anchorage |
| CN105648921A (en) * | 2016-02-18 | 2016-06-08 | 长江水利委员会长江科学院 | Suspension bridge rock mass and reinforced concrete plate composited type anchorage and construction method thereof |
| CN213114309U (en) * | 2020-07-08 | 2021-05-04 | 深圳市综合交通设计研究院有限公司 | Hidden type bridge anchoring system |
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