CN214939278U - Suspension bridge channel type anchorage foundation - Google Patents
Suspension bridge channel type anchorage foundation Download PDFInfo
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- CN214939278U CN214939278U CN202120550234.9U CN202120550234U CN214939278U CN 214939278 U CN214939278 U CN 214939278U CN 202120550234 U CN202120550234 U CN 202120550234U CN 214939278 U CN214939278 U CN 214939278U
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Abstract
The utility model discloses a suspension bridge passageway formula anchorage basis, by supreme subbottom, the lane anchor body and anchorage concrete bench pier of including in proper order, the cross-section of lane anchor body is "pi" shape, the both sides of lane anchor body lower extreme with be equipped with soleplate between the subbottom respectively, the lane anchor body with form the driving passageway between the soleplate. The suspension bridge channel type anchorage foundation has the functions of the channel and the anchorage, can provide stable tensile resistance to stabilize a bridge, can enable a vehicle to pass through the anchorage, and solves the problem of transverse deflection of a main cable under the condition that a route is located in a gentle curve.
Description
Technical Field
The utility model relates to a bridge engineering technical field specifically is a suspension bridge passageway formula anchorage foundation structure.
Background
The anchorage is one of the most important structures for anchoring the main cable of the ground anchor type suspension bridge, and has the functions of transmitting the tension of the main cable to an anchorage block, transmitting the force to an anchorage foundation through the anchorage block and finally transmitting the force to the foundation, so that the tension of the main cable is balanced and the effect of providing anchoring force for the main cable is achieved. The common anchorage form is a gravity type anchorage, and the horizontal component force of the main cable is balanced by the friction force between an anchorage body and a foundation through the complete gravity type anchorage.
A traditional suspension bridge gravity type anchorage foundation is usually placed below a bridge floor, supporting conditions are formed by excavating a mountain or constructing an underground enclosure structure, then concrete is poured to form a gravity type structure, and the tensile force of a cable is resisted by means of the frictional resistance generated by the self weight of the gravity type structure.
However, when the anchor foundation is in the mountainous valley terrain, the bridge position and bridge type scheme selection of the bridge are limited by a plurality of factors, and the anchor position of the suspension bridge causes the road line shape of the anchor position to be positioned on the transition curve, a transverse offset distance can occur between the route central line of the bridge and the central line of the main cable, and sometimes the distance reaches 3-5 m. If the anchorage is arranged according to the traditional method, the whole anchor body can be arranged below a bridge deck (road surface) after a deep foundation pit is excavated, and meanwhile, a front buttress of the anchorage needs to be pulled open to change the direction of a main cable so as to avoid blocking the bridge deck (road surface) near the anchorage, so that special reinforcement design needs to be carried out on a cable tower, a main cable saddle and a scattered cable saddle, and the risk of a bridge structure is increased. If the cable is straightened, the cable can block the bridge floor (road surface) near the anchorage, and vehicles are difficult to pass through.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a novel anchorage foundation structure who puts up the problem is overlapped to adaptation moderate curve highway section, solution cable anchor connecting point and bridge floor (road surface).
The utility model provides an adopted technical scheme of its technical problem does: the suspension bridge channel type anchorage foundation sequentially comprises a base, a lane anchor body and an anchorage concrete pier from bottom to top, wherein the cross section of the lane anchor body is n-shaped, base bottom plates are respectively arranged between two sides of the lower end of the lane anchor body and the base, and a travelling channel is formed between the lane anchor body and the base bottom plates.
Furthermore, the subbase is formed by pouring plain concrete, and the foundation slab, the traffic lane anchor body and the anchorage concrete pier are formed by pouring reinforced concrete.
Furthermore, the subbase is poured in layers, and the pouring height of each layer is not more than 3 m.
The utility model has the advantages that: the suspension bridge channel type anchorage foundation has the functions of the channel and the anchorage, can provide stable tensile resistance to stabilize a bridge, can enable a vehicle to pass through the anchorage, and solves the problem of transverse deflection of a main cable under the condition that a route is located in a gentle curve.
Compared with the traditional gravity type anchorage, the design has the following advantages:
the channel type anchorage mainly solves the problem that a side-span main cable and a road surface or a bridge surface are erected due to plane linearity, so that the main cable does not need to be provided with a transverse deflection angle, and a cable tower, a main cable saddle and a scattered cable saddle do not need to be specially designed for reinforcement.
And the channel type anchorage can be combined with roadbed section excavation, so that the excavation of a deep foundation pit is avoided compared with the traditional gravity type anchorage foundation scheme, the excavation of the foundation pit is reduced, the water drainage during construction is easier, the foundation construction difficulty is small, and the method is relatively more environment-friendly.
And key components such as an anchor body and an anchoring system of the channel type anchorage are positioned above the bridge floor, so that the maintenance is more convenient and faster compared with the traditional anchorage scheme, and the later maintenance cost is lower.
Drawings
Fig. 1 is a perspective view of an anchorage foundation structure of the present invention;
fig. 2 and fig. 3 are a front view and a side view of the foundation construction of the tie back of the present invention, respectively.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the suspension bridge channel type anchorage foundation sequentially comprises a base 5, a traffic lane anchor body 2 and an anchorage concrete pier 1 from bottom to top, wherein the section of the traffic lane anchor body 2 is n-shaped, base bottom plates 4 are respectively arranged between two sides of the lower end of the traffic lane anchor body 2 and the base 5, and a traffic channel 3 is formed between the traffic lane anchor body 2 and the base bottom plates 4. The height of the travelling crane channel 3 is limited to 4.5 meters, and the width of the travelling crane channel 3 is 2-7.5 meters; the subbase 5 is formed by pouring plain concrete, and the foundation slab 4, the traffic lane anchor body 2 and the anchor concrete pier 1 are formed by pouring reinforced concrete.
Further, the subbottom 5 adopts layered casting, and the casting height of each layer is not more than 3 m.
As shown in fig. 2 and 3, the utility model also provides a construction method of suspension bridge passageway type anchorage foundation, its step is as follows:
s1, excavating on an inclined weathered rock surface 6 of a mountain valley terrain to form a side slope excavating surface 7, wherein the slope of the side slope excavating surface 7 is 1: 0.75; considering the arrangement of drainage ditches in the excavated bottom plane area, adding 1.5 meters in the peripheral direction of the excavated bottom plane area compared with the designed bottom area, pouring plain concrete in layers according to the fluctuation condition of rock strata of the bottom plane area, and pouring height of each layer is not more than 3 meters to form a base 5;
s2, pouring reinforced concrete on the base 5 to form a separated foundation slab 4;
s3, pouring reinforced concrete on a separated foundation slab 4 to form a lane anchor body 2, wherein the cross section of the lane anchor body 2 is n-shaped, and a cavity is formed between the lane anchor body 2 and the foundation slab 4 to form a traffic channel 3;
and S4, pouring reinforced concrete on a top plate of the roadway anchor body 2 to form an anchor concrete pier 1.
The above mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the description of the present invention are still included in the scope covered by the present invention.
Claims (3)
1. The suspension bridge channel type anchorage foundation is characterized by sequentially comprising a base, a traffic lane anchor body and anchorage concrete piers from bottom to top, wherein the cross section of the traffic lane anchor body is n-shaped, base bottom plates are respectively arranged between two sides of the lower end of the traffic lane anchor body and the base, and a travelling channel is formed between the traffic lane anchor body and the base bottom plates.
2. The suspension bridge channel type anchorage foundation of claim 1, wherein the foundation is formed by pouring plain concrete, and the foundation bottom plate, the traffic lane anchor body and the anchorage concrete pier are formed by pouring reinforced concrete.
3. The suspension bridge channel type anchorage foundation according to claim 1 or 2, wherein the foundation is poured layer by layer, and the pouring height of each layer is not more than 3 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120550234.9U CN214939278U (en) | 2021-03-17 | 2021-03-17 | Suspension bridge channel type anchorage foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120550234.9U CN214939278U (en) | 2021-03-17 | 2021-03-17 | Suspension bridge channel type anchorage foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214939278U true CN214939278U (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120550234.9U Active CN214939278U (en) | 2021-03-17 | 2021-03-17 | Suspension bridge channel type anchorage foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214939278U (en) |
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2021
- 2021-03-17 CN CN202120550234.9U patent/CN214939278U/en active Active
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