CN111851293A - Bridge hidden anchoring system and construction method thereof - Google Patents
Bridge hidden anchoring system and construction method thereof Download PDFInfo
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- CN111851293A CN111851293A CN202010653769.9A CN202010653769A CN111851293A CN 111851293 A CN111851293 A CN 111851293A CN 202010653769 A CN202010653769 A CN 202010653769A CN 111851293 A CN111851293 A CN 111851293A
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- anchoring
- main cable
- bridge
- cable channel
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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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- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention is suitable for the technical field of bridge engineering and provides a hidden type bridge anchoring system and a construction method thereof. The 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 the main cable extends into the composite anchor body through the main cable channel. The anchoring system is integrally positioned in the mountain body, can provide anchoring force by utilizing the self weight of the mountain body, is reliable in stress, is more economical in manufacturing cost than the conventional gravity type anchoring system, and can be used as a better alternative scheme of a suspension bridge anchoring system when conditions permit.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a hidden type bridge anchoring system and a construction method thereof.
Background
Suspension bridges, also known as suspension bridges, refer to bridges with cables (or steel chains) suspended by cable towers and anchored to both banks (or ends of the bridge) as the main load-bearing members of the superstructure.
The suspension bridge is a bridge structure type which spans a valley with larger width and is commonly used at present, and the modeling is beautiful. The anchoring system is an important component of the stress of the suspension bridge, and the commonly used anchoring types are a gravity anchor and a tunnel anchor.
However, the existing anchoring systems are expensive, and for this reason, it is necessary to develop an economical anchoring solution for the suspension bridge.
Disclosure of Invention
The invention aims to solve the technical problem of providing a hidden bridge anchoring system and a construction method thereof, and aims to solve the problem that the existing anchoring system is high in manufacturing cost.
The invention is realized in such a way that a bridge hidden 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 the main cable extends into the composite anchoring body through the main cable channel.
Furthermore, the composite anchoring body comprises an anchoring steel ingot, a reinforced concrete anchoring cushion block, a pile foundation and a grouting reinforcement body which are arranged inside the mountain body from the side of the mountain body far away from the bridge to the side close to the bridge in sequence; a hole is formed in the middle of the anchoring steel ingot, and the main cable penetrates out of the hole and is fixed by an anchorage device and a clamp; the anchoring steel ingot is wrapped by anchor sealing concrete.
Further, the anchoring steel ingot is cylindrical.
Furthermore, the main cable channel is inclined to the horizontal direction, and one end of the main cable channel close to the bridge is higher than one end of the main cable channel far away 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 0.5-1.0 m larger than the outer diameter of the main cable, and micro-expansion concrete is poured into the main cable channel.
Furthermore, the reinforced concrete anchoring cushion block is poured by high-strength concrete, and a plurality of layers of stress dispersion reinforcing steel bars which are arranged in a staggered mode in the transverse and vertical directions 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 close to the anchoring steel ingot is a small-section end, and the end of the reinforced concrete anchoring cushion block close to the pile foundation is a large-section end; the slip casting adds solid all is trapezoidal in plane and vertical cross sectional shape, and its one end that is close to the pile foundation is little section end, and its one end of keeping away from the pile foundation is big section end.
Furthermore, the foundation pile is used as a foundation pit supporting structure of the reinforced concrete anchoring cushion block and is also used as an important force transmission component; and a plurality of rows of prestressed anchor cables are embedded in the foundation pile, extend out of one side of the foundation pile close to the mountain body and are anchored into the mountain body.
Further, the grouting reinforcement body is reinforced by injecting grout into the steel perforated pipe, and the grout is cement paste or cement mortar.
The invention also provides a construction method of the hidden bridge anchoring system for solving the technical problems, which comprises the following steps:
s1, constructing a pile foundation, and reserving conditions for later-stage main cable channel construction;
s2, grouting a reinforcing body and reserving conditions for later-stage main cable channel construction;
s3, excavating a foundation pit, and synchronously constructing a plurality of rows of prestressed anchor cables;
s4, constructing a main cable channel;
s5, constructing a reinforced concrete anchoring cushion block, and reserving a main cable access channel;
s6, connecting a main cable;
s7, anchoring the main cable at the anchoring steel ingot;
s8, constructing anchor sealing concrete;
s9, pouring main cable channel concrete;
and S10, backfilling the foundation pit and covering soil, and restoring to the original state.
Compared with the prior art, the invention has the beneficial effects that:
the hidden bridge anchoring system and the construction method thereof provided by the invention have the advantages that the anchoring system is integrally positioned in the mountain body, the dead weight of the mountain body can be utilized to provide anchoring force, the stress is reliable, the manufacturing cost is more economic than that of the conventional gravity type anchoring system, and the hidden bridge anchoring system can be used as a better alternative scheme of a suspension bridge anchoring system when the conditions permit.
Drawings
FIG. 1 is a schematic elevation view of a concealed bridge anchoring system according to an embodiment of the present invention;
FIG. 2 is an enlarged view of the anchoring system of FIG. 1 at the location of the composite anchor;
fig. 3 is a schematic plan view of a concealed bridge anchoring system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit 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", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 3, a bridge concealed anchoring system according to a preferred embodiment of the present invention is shown, which includes a main cable channel 1 and a composite anchoring body, the composite anchoring body is located on a side of a mountain 200 away from a bridge; the main cable channel 1 is arranged in the mountain body 200, and the main cable 100 extends into the composite anchoring body through the main cable channel 1.
The combined type anchoring body comprises an anchoring steel ingot 2, a reinforced concrete anchoring cushion block 3, a pile foundation 4 and a grouting reinforcement body 5 which are arranged inside a mountain body 200 and are sequentially arranged from one side of the mountain body 200 far away from the bridge to one side close to the bridge. A hole is formed in the middle of the anchoring steel ingot 2, and the main cable 100 penetrates out of the hole and is fixed by an anchorage device and a clamp; the anchoring steel ingot 2 is wrapped by anchor sealing concrete 6. Preferably, the anchoring block 2 has a cylindrical shape.
The main cable channel 1 is inclined to the horizontal direction, and one end of the main cable channel close to the bridge is higher than one end far away from the bridge. The main cable channel 1 is designed to be horizontally inclined, and the composite anchoring body can be arranged at the bottom of the mountain body 200 as far as possible, so that the self weight of the mountain body 200 can be utilized to provide anchoring 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 0.5-1.0 m larger than the outer diameter of the main cable 100, and micro-expansion concrete is poured into the main cable channel 1.
The reinforced concrete anchoring cushion block 3 is cast by high-strength concrete, and is internally provided with a plurality of layers of stress dispersion reinforcing steel bars which are arranged in a staggered manner in the transverse and vertical directions.
In order to enable the overall shape of the composite anchoring body to be better matched with the slope of a mountain and to realize the concealed design of the composite anchoring body, the horizontal section and the vertical section of the reinforced concrete anchoring cushion block 3 are both trapezoidal, one end of the reinforced concrete anchoring cushion block close to the anchoring steel ingot 2 is a small-section end, and the end of the reinforced concrete anchoring cushion block close to the pile foundation 4 is a large-section end. The cross-sectional shape of slip casting reinforcement body 5 in plane and vertical all is trapezoidal, and its one end that is close to pile foundation 4 is little section end, and its one end of keeping away from pile foundation 4 is big section end.
The foundation pile 4 is used as a foundation pit supporting structure of the reinforced concrete anchoring cushion block 3 and is also used as an important force transmission component. And a plurality of rows of prestressed anchor cables 7 are embedded in the foundation pile 4, and the plurality of rows of prestressed anchor cables 7 extend out of one side of the foundation pile 4 close to the mountain 200 and are anchored into the mountain 200.
The grouting reinforcement body 5 is reinforced by injecting grout into the steel perforated pipe 8, and the grout is cement paste or cement mortar.
The embodiment also provides a construction method of the hidden bridge anchoring system, which comprises the following steps:
s1, constructing a pile foundation 4, and reserving conditions for later-stage main cable channel 1 construction;
S2, constructing a grouting reinforcement body 5, and reserving conditions for later-stage main cable channel 1 construction;
s3, excavating a foundation pit, and synchronously constructing a plurality of rows of prestressed anchor cables 7;
s4, constructing a main cable channel 1;
s5, constructing a reinforced concrete anchoring cushion block 3, and reserving a main cable 100 access channel;
s6, connecting the main cable 100;
s7, anchoring the main cable 100 at the anchoring steel ingot 2;
s8, constructing anchor sealing concrete 6;
s9, pouring concrete in the main cable channel 1;
and S10, backfilling the foundation pit with the soil 9, and restoring the foundation pit to the original shape.
In summary, in the concealed bridge anchoring system and the construction method thereof provided in this embodiment, the whole anchoring system is located in the mountain 200, and the dead weight of the mountain can be used to provide the anchoring force, so that the system is stressed reliably and is more economical in manufacturing cost than the conventional gravity type anchoring system, and the system can be used as a better alternative for the suspension bridge anchoring system when the conditions allow.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The hidden bridge anchoring system 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 body, which is far away from a bridge; the main cable channel is arranged in the mountain body, and the main cable extends into the composite anchoring body through the main cable channel.
2. The concealed bridge anchoring system of claim 1, wherein the composite anchoring body comprises an anchoring steel ingot, a reinforced concrete anchoring cushion block, a pile foundation and a grouting reinforcement body which are arranged inside the mountain body and are arranged in sequence from one side of the mountain body far away from the bridge to one side of the mountain body close to the bridge; a hole is formed in the middle of the anchoring steel ingot, and the main cable penetrates out of the hole and is fixed by an anchorage device and a clamp; the anchoring steel ingot is wrapped by anchor sealing concrete.
3. The bridge concealed anchoring system of claim 1, wherein said anchoring ingot is cylindrical.
4. The concealed bridge anchoring system of claim 1, wherein said main cable channel is inclined to the horizontal with its end closer to the bridge being higher than its end further from the bridge.
5. The concealed bridge anchoring system of claim 1, wherein the main cable channel is constructed in a trenchless manner by using a pipe jacking or a horizontal directional drilling, the inner diameter of the main cable channel is 0.5-1.0 m larger than the outer diameter of the main cable, and micro-expansion concrete is poured into the main cable channel.
6. The concealed bridge anchoring system of claim 1, wherein said reinforced concrete anchoring blocks are cast with high strength concrete, and a plurality of layers of stress dispersing reinforcing bars are disposed in staggered arrangement in the horizontal and vertical directions.
7. The concealed bridge anchoring system of claim 2, wherein the horizontal and vertical cross-sections of the reinforced concrete anchoring blocks are each trapezoidal in shape, with the small cross-section end at the end near the anchoring ingot and the large cross-section end at the end near the pile foundation; the slip casting adds solid all is trapezoidal in plane and vertical cross sectional shape, and its one end that is close to the pile foundation is little section end, and its one end of keeping away from the pile foundation is big section end.
8. The concealed bridge anchoring system of claim 2, wherein said foundation piles serve as foundation pit supporting structures for said reinforced concrete anchor blocks and at the same time as important force transfer members; and a plurality of rows of prestressed anchor cables are embedded in the foundation pile, extend out of one side of the foundation pile close to the mountain body and are anchored into the mountain body.
9. The concealed bridge anchoring system of claim 2, wherein said grouting reinforcement is reinforced with steel perforated pipe grouting grout, said grout being grout or cement mortar.
10. A method of constructing a concealed bridge anchoring system according to claim 8, comprising the steps of:
S1, constructing a pile foundation, and reserving conditions for later-stage main cable channel construction;
s2, grouting a reinforcing body and reserving conditions for later-stage main cable channel construction;
s3, excavating a foundation pit, and synchronously constructing a plurality of rows of prestressed anchor cables;
s4, constructing a main cable channel;
s5, constructing a reinforced concrete anchoring cushion block, and reserving a main cable access channel;
s6, connecting a main cable;
s7, anchoring the main cable at the anchoring steel ingot;
s8, constructing anchor sealing concrete;
s9, pouring main cable channel concrete;
and S10, backfilling the foundation pit and covering soil, and restoring to the original state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010653769.9A CN111851293A (en) | 2020-07-08 | 2020-07-08 | Bridge hidden anchoring system and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010653769.9A CN111851293A (en) | 2020-07-08 | 2020-07-08 | Bridge hidden anchoring system and construction method thereof |
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| Publication Number | Publication Date |
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| CN111851293A true CN111851293A (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010653769.9A Pending CN111851293A (en) | 2020-07-08 | 2020-07-08 | Bridge hidden anchoring system and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554056A (en) * | 2020-12-16 | 2021-03-26 | 长江水利委员会长江科学院 | Horizontal anchorage structure of suspension bridge and construction method |
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2020
- 2020-07-08 CN CN202010653769.9A patent/CN111851293A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554056A (en) * | 2020-12-16 | 2021-03-26 | 长江水利委员会长江科学院 | Horizontal anchorage structure of suspension bridge and construction method |
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