CN211815483U - Railway bridge structure with fragment tracks for movable fracture - Google Patents
Railway bridge structure with fragment tracks for movable fracture Download PDFInfo
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- CN211815483U CN211815483U CN202020301080.5U CN202020301080U CN211815483U CN 211815483 U CN211815483 U CN 211815483U CN 202020301080 U CN202020301080 U CN 202020301080U CN 211815483 U CN211815483 U CN 211815483U
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Abstract
The utility model discloses a movable fracture railway bridge structure with ballast tracks, which comprises a flexible foundation, a bridge beam body and a fixed rope, wherein the flexible foundation is arranged on a movable fracture zone foundation at intervals, the bridge beam body comprises a beam body unit I and a beam body unit II, the adjacent end parts of the beam body unit I and the beam body unit II are positioned at the top of the flexible foundation, the lower part of the bridge beam body is provided with a reserved hole, the fixed rope passes through the reserved hole to be fixedly connected with the flexible foundation, the flexible foundation has good shock resistance and better economical efficiency, the bridge beam body with the fixed rope is arranged on the flexible foundation of the movable fracture zone foundation, when an earthquake occurs or the movable fracture zone foundation generates larger creep deformation, the bridge beam body can not slide off and can not generate stress concentration damage between structures, the bridge beam body has better shock resistance and continuous deformation resistance, and can not cause vertical deformation and plane deformation after overlarge deformation, the bridge body can be adjusted and repaired quickly, and the engineering investment is reduced.
Description
Technical Field
The utility model relates to a railway engineering field, especially the activity fracture has tiny fragments of stone, coal, etc. track railway bridge structures.
Background
The active fracture zones are distributed in a large number in areas with active earthquakes, the active fracture zones are places where stress is easy to accumulate, are hotbeds for earthquakes, and are often generated by major earthquakes, and when no earthquakes are generated, the stratum of the fracture zones usually generates creep deformation. The impact of the live fracture zone on the engineered structure is very great. Typical building structures should be no less than 200m away from the fracture zone. The railway engineering belongs to strip engineering, and along with the continuous promotion of western construction, the railway construction is difficult to realize by completely avoiding movable fracture zones, for example, proposed Sichuan-Tibet railway engineering must pass through a plurality of movable fracture zones, so that a bridge structure in the movable fracture zones has poor anti-seismic performance, weaker continuous deformation resistance and high engineering investment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: aiming at the problems of poor anti-seismic performance, weaker continuous deformation resistance and high engineering investment of a bridge structure in a movable fracture zone in the prior art, the movable fracture zone ballasted track railway bridge structure is provided.
In order to realize the purpose, the utility model discloses a technical scheme be:
the railway bridge structure with the active fracture ballast track comprises a flexible foundation, a bridge beam body and a fixed rope, wherein the flexible foundation is arranged on a foundation of the active fracture zone at intervals;
the bridge beam body comprises a beam body unit I and a beam body unit II, and the adjacent end parts of the beam body unit I and the beam body unit II are positioned at the top of the flexible foundation;
the lower part of the bridge body is provided with a preformed hole, and the fixed rope penetrates through the preformed hole to be fixedly connected with the flexible foundation.
Through the structure, flexible basis shock resistance is good, better economic nature has, set up the bridge girder body that has fixed rope on being in the flexible basis of activity fracture zone ground, the preformed hole does benefit to the fixed construction of fixed rope, when earthquake or activity fracture zone ground produced great creep deformation, the bridge girder body can not the landing, can not produce stress concentration destruction between the structure, have better anti-seismic performance and anti deformation capability that lasts, simultaneously in vertical deformation and plane deformation too big back, the bridge girder body can be simply quick adjusts the restoration, the engineering investment has been reduced.
As the utility model discloses an optimal scheme all is equipped with limit beam on roof beam body unit one and the roof beam body unit two, adjacent limit beam on two roof beam body units and the both sides in close contact with on the flexible basis. Through above-mentioned structure, limit beam can avoid direct contact to produce stress concentration destruction between the bridge roof beam body.
As the preferred scheme of the utility model, the end of the first beam body unit and the second beam body unit adopts a flat bottom structure. Through the structure, the contact area of the flat-bottom structure is large, and the flat-bottom structure can avoid the stress concentration phenomenon between the bridge body and the flexible foundation.
As the utility model discloses an optimal scheme, the inside pre-buried anchor end that has fixed rope in flexible basis, fixed rope pass preformed hole and anchor end fixed connection. Through the structure, the fixed ropes can fix the bridge body on the plane.
As the preferred scheme of the utility model, the quantity of fixed rope is at least two.
As the preferred scheme of the utility model, the structural width on flexible basis is greater than the width of the bridge roof beam body. Through the structure, the bridge body can be adjusted on the plane to a larger extent.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
flexible basic shock resistance is good, has better economic nature, set up the bridge girder body that has fixed rope on being in the flexible basis of activity fracture zone ground, the preformed hole does benefit to the fixed construction of fixed rope, when earthquake or activity fracture zone ground produced great creep deformation, the bridge girder body can not the landing, can not produce the concentrated destruction of stress between the structure, better anti-seismic performance and anti deformation ability that lasts have, simultaneously in vertical deformation and plane deformation too big back, the bridge girder body can be simply quick adjusts the restoration, the engineering investment has been reduced.
Drawings
Fig. 1 is the utility model discloses the activity fracture has ballast track railway bridge structures's vertical section sketch map.
Fig. 2 is a partially enlarged view of the region B in fig. 1.
Fig. 3 is the utility model discloses the activity fracture has the plane sketch map of tiny fragments of stone, coal, etc. track railway bridge girder structure.
Icon: 1-a flexible base; 2-bridge girder body; 21-beam body unit one; 22-beam body unit two; 3-fixing the rope; 4-limiting the cross beam; a-ground line.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Examples
As shown in fig. 1 to 3, the embodiment provides a movable fracture railway bridge structure with ballast tracks, which includes a flexible foundation 1, a bridge body 2 and a fixing rope 3.
The quantity of flexible basis 1 is two, and two flexible basis 1 intervals set up on the ground of activity fracture area, and flexible basis 1 can adopt check guest cage retaining wall structure or reinforced earth retaining wall structure, and the width of flexible basis 1 is greater than the width of bridge beam body 2.
The bridge beam 2 comprises a plurality of beam units arranged along the longitudinal direction of the bridge, and the following description takes two adjacent beam units as an example:
two adjacent roof beam body units that set up on the bridge roof beam body 2 are roof beam body unit one 21 and two 22 of roof beam body unit respectively, the adjacent tip setting of roof beam body unit one 21 and two 22 of roof beam body unit is at the top of same flexible foundation 1, the end of roof beam body unit one 21 and two 22 of roof beam body unit adopts flat bottom structure, the lower part of bridge roof beam body 2 is equipped with the preformed hole, all be equipped with limiting beam 4 on roof beam body unit one 21 and the two 22 of roof beam body unit, adjacent limiting beam 4 and the side in close contact with of flexible foundation 1 on roof beam body unit one 21 and the two 22 of roof beam body unit.
Fixed rope 3 has carried out anticorrosive treatment, and fixed rope 3's anchor end is pre-buried in the inside of flexible basis 1 in advance, and fixed rope 3 passes the preformed hole of 2 lower parts of bridge beam body and is in the same place with the anchor end fixed connection in the flexible basis 1.
The embodiment also provides a construction method of the movable fracture railway bridge structure with the ballast tracks, which is used for constructing the bridge structure and comprises the following steps:
s1: tamping the foundation of the flexible foundation 1 or reinforcing the foundation by adopting pile foundation treatment;
s2: constructing the flexible foundation 1 until the top elevation is reached, embedding a plurality of anchoring ends in the flexible foundation 1 at intervals, and exposing the top of the flexible foundation 1 at the upper part of the fixing rope 3 and performing anticorrosion protection;
s3: the flexible foundation 1 is stood until the deformation is stable or a pre-pressing measure is applied to the top of the flexible foundation 1 until the deformation is stable;
s4: a bridge beam body 2 structure is placed at the top of the flexible foundation 1, and a limiting cross beam 4 of the bridge beam body 2 is in close contact with the side face of the flexible foundation 1;
s5: the fixing rope 3 after the anticorrosion treatment penetrates through a preformed hole at the end part of the bridge body 2, and two ends of the fixing rope 3 are tensioned, connected and fixed with the fixing rope 3 exposed in the step S2;
s6: laying railway ballast and a track structure on the bridge beam body 2;
the embodiment also provides a repairing method of the movable fracture railway bridge structure with the ballast track, which is used for repairing the bridge structure and comprises the following steps:
a1: under the condition of a major earthquake or larger vertical deformation of a stratum, the bridge beam body 2 is in flexible contact with the flexible foundation 1, so that stress concentration is not generated, the structure of the bridge beam body 2 cannot be damaged, and the ballast thickness can be adjusted on the bridge beam body 2 to meet railway operation;
or A2: under the condition that a major earthquake occurs or overlarge vertical or plane displacement occurs in the stratum, the fixed rope 3 is detached, the cushion block on the flexible foundation 1 is lifted or the plane position of the bridge beam body 2 is adjusted, the bridge beam body 2 structure is placed at the top of the flexible foundation 1, the fixed rope 3 penetrates through the bridge beam body 2 structure and is fixedly connected with the flexible foundation 1, and the repair and adjustment of the bridge structure 2 can be completed.
The railway bridge structure with the active fracture and the ballast track, the construction method and the repair method have the beneficial effects that:
limiting cross beams 4 are arranged on the first beam body unit 21 and the second beam body unit 22, adjacent limiting cross beams 4 on the first beam body unit 21 and the second beam body unit 22 are in close contact with the side face of the flexible foundation 1, and the limiting cross beams 4 can avoid stress concentration damage caused by direct contact between bridge bodies;
the width of the flexible foundation 1 is larger than that of the bridge body 2, so that the bridge body 2 can be adjusted on a plane to a larger extent;
the construction method and the repair method ensure effective realization and repair adjustment of the bridge structure function, and good anti-seismic performance and continuous deformation resistance effect, and have the characteristics of simple construction, rapidness, economy, environmental protection, contribution to popularization and the like.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The railway bridge structure with the active fracture ballast track is characterized by comprising a flexible foundation (1), a bridge body (2) and a fixed rope (3), wherein the flexible foundation (1) is arranged on the foundation of the active fracture zone at intervals;
the bridge beam body (2) comprises a beam body unit I (21) and a beam body unit II (22) which are arranged along the longitudinal direction of the bridge, and the adjacent ends of the beam body unit I (21) and the beam body unit II (22) are positioned at the top of the same flexible foundation (1);
the lower part of the bridge body (2) is provided with a preformed hole, and the fixed rope (3) penetrates through the preformed hole and the flexible foundation (1) in fixed connection.
2. The active fracture ballast track railway bridge structure with the ballast tracks according to claim 1, wherein the first beam body unit (21) and the second beam body unit (22) are both provided with limiting beams (4), and the adjacent limiting beams (4) on the two beam body units are in close contact with two sides of the flexible foundation (1).
3. The active fracture ballast track railway bridge structure with the ballast tracks according to claim 1, wherein the ends of the first beam body unit (21) and the second beam body unit (22) are of flat bottom structures.
4. The active fracture ballast track railway bridge structure with the ballast tracks according to claim 1, wherein an anchoring end of the fixing rope (3) is embedded in the flexible foundation (1), and the fixing rope (3) penetrates through the preformed hole to be fixedly connected with the anchoring end.
5. The movable fracture ballast track railway bridge structure according to claim 1, wherein the number of the fixing ropes (3) is at least two.
6. The active fracture ballast track railway bridge structure according to claim 1, wherein the flexible foundation (1) has a structural width greater than the width of the bridge beam body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020301080.5U CN211815483U (en) | 2020-03-12 | 2020-03-12 | Railway bridge structure with fragment tracks for movable fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020301080.5U CN211815483U (en) | 2020-03-12 | 2020-03-12 | Railway bridge structure with fragment tracks for movable fracture |
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| Publication Number | Publication Date |
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| CN211815483U true CN211815483U (en) | 2020-10-30 |
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| CN202020301080.5U Active CN211815483U (en) | 2020-03-12 | 2020-03-12 | Railway bridge structure with fragment tracks for movable fracture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236036A (en) * | 2020-03-12 | 2020-06-05 | 中铁二院工程集团有限责任公司 | Railway bridge structure with movable fracture ballast track, construction method and repair method |
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2020
- 2020-03-12 CN CN202020301080.5U patent/CN211815483U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236036A (en) * | 2020-03-12 | 2020-06-05 | 中铁二院工程集团有限责任公司 | Railway bridge structure with movable fracture ballast track, construction method and repair method |
| CN111236036B (en) * | 2020-03-12 | 2024-06-18 | 中铁二院工程集团有限责任公司 | Railway bridge structure with movable broken ballasted track, construction method and repair method |
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