CN215104606U - Combined structure of cast-in-place and prefabricated combined bridge upper connecting rail - Google Patents
Combined structure of cast-in-place and prefabricated combined bridge upper connecting rail Download PDFInfo
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- CN215104606U CN215104606U CN202120789644.9U CN202120789644U CN215104606U CN 215104606 U CN215104606 U CN 215104606U CN 202120789644 U CN202120789644 U CN 202120789644U CN 215104606 U CN215104606 U CN 215104606U
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Abstract
The utility model discloses a combined structure of a track on a bridge combining cast-in-place and prefabrication, which is used for realizing the track connection of a newly-built railway and an existing line on the bridge, and comprises a large frame of a cast-in-place structure and a small frame of a prefabricated structure; the cast-in-place large frame is arranged between two adjacent piers of the existing line, the width of the cast-in-place large frame is larger than that of the bridge of the original existing line, and the cast-in-place large frame is eccentrically arranged on the newly built railway towards the outside; the lower part of the large frame is reinforced through a pile foundation, and the upper end surface of the large frame is flush with the upper end surface of the pier; the prefabricated small frames are transversely arranged on the large frames and span between two adjacent large frames and above the bridge piers; and a newly built railway, an existing line and a turnout device are arranged above the small frame and are used as a bridge of the newly built railway and the existing line. The utility model provides a meet the rail problem on the bridge, can be very big save construction cycle, reduce existing line outage time, reduce social cost.
Description
Technical Field
The utility model belongs to the reconstruction extension field of existing railway line, concretely relates to novel technique of rail joint on cast-in-place, the bridge that prefabricated combined together.
Background
The newly-built railway and the existing railway are mostly completed in a roadbed section, and no engineering example for realizing the on-bridge track connection in the constructed railway exists at present.
Railway track connection is bound to be free from turnout structures, and has the disadvantages of complex stress, easy damage and difficult replacement. In order to ensure the durability of the turnout structure and the safety of railways, the turnout structure is required to be arranged on an integral continuous bridge surface by regulations when being positioned on a bridge, meanwhile, the distance between a turnout point and a beam seam is required to be more than or equal to 18m, so when the turnout is positioned on the bridge, the traditional method mostly adopts a porous continuous beam, controls the bending span ratio to be not more than 1/4000, generally controls the span to be not more than 48m, and mostly adopts a continuous beam with the width of 6-32m, 4-32m or 3-32m or the like or widens according to the type and the length of the turnout.
If the track connection on the bridge is guided by the track combination technology of the moving road base section, namely the operation of the existing line is interrupted, the beam body and the pier of the existing upper structure are removed, and the construction of the turnout continuous beam, the matched pier and the foundation which are newly designed is carried out.
Therefore, the rail connection on the bridge usually needs higher engineering cost and longer time, and the economic cost and the social cost are obviously increased due to the longer construction period.
However, in some railway engineering, the rail bridging between the newly-built railway and the existing railway must be realized at a certain working site, and the prior art lacks the rail bridging form and the complete technology to solve the problems.
SUMMERY OF THE UTILITY MODEL
At least one in defect or improvement demand more than prior art, the utility model provides a cast-in-place, prefabricated integrated configuration form who combines together connects the rail on the bridge forms complete set technique for solve the rail problem on the bridge, can be very big save construction cycle, reduce existing line shut down time, reduce social cost, and provided a brand-new structural style, made important innovation, and cooperate this structural style to propose supporting complete set construction technology, can popularize and apply on a large scale, provide complete set solution for the reconstruction extension engineering of the existing railway line of the same kind.
In order to realize the above purpose, according to the utility model discloses an aspect provides a composite construction of cast-in-place, prefabricated bridging that combines together for newly-built railway and existing line realize the bridging on the bridge, wherein:
the system comprises a large frame of a cast-in-place structure and a small frame of a prefabricated structure;
the cast-in-place large frame is arranged between two adjacent piers of the existing line, the width of the cast-in-place large frame is larger than that of the bridge of the original existing line, and the cast-in-place large frame is eccentrically arranged on the newly built railway towards the outside; the lower part of the large frame is reinforced through a pile foundation, and the upper end surface of the large frame is flush with the upper end surface of the pier; connecting two adjacent large frames in the outer side direction of a middle pier through cast-in-place concrete with a plurality of pre-embedded reserved steel bar joints and joint belts extending towards each other;
the prefabricated small frames are transversely arranged on the large frames, and span between two adjacent large frames and above the bridge piers; and a newly built railway, an existing line and a turnout device are arranged above the small frame and are used as a bridge of the newly built railway and the existing line.
Preferably, the maximum length of the small frame in the transverse direction of the line is equal to or less than the width of the large frame, and the minimum length of the small frame can ensure that a newly-built railway, an existing line and a turnout device are set.
Preferably, the small frames comprise a middle small frame and a cross small frame;
the plurality of middle small frames are arranged right above the large frames, and the single crossing small frame is arranged between two adjacent large frames in a crossing mode and supported on a pier.
Preferably, the lengths of the middle type small frame and the crossing type small frame in the line transverse direction are equal.
The above-described preferred features may be combined with each other as long as they do not conflict with each other.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:
1. the utility model provides a novel cast-in-place, prefabricated integrated configuration who combines together connects the rail on the bridge forms the integrated technology for solve the bridging problem, can be very big save construction cycle, reduce existing line shut down time, reduce social cost.
2. The utility model also provides a brand-new structural style, this structural style uses cast-in-place big frame and prefabricated little frame to be the main structure, has guaranteed the enforceable nature of scheme through reserving the steel bar joint, and the construction that utilizes this structural style to realize bridging the rail and for the engineering has made important innovation.
3. The utility model discloses a meet rail complete set technique on bridge provides perfect solution for the reconstruction extension engineering of the existing railway line of the same kind, can popularize and apply on a large scale, promotes the development of railway trade.
Drawings
FIG. 1 is a schematic side view of the combined cast-in-place, prefabricated, and integrated track-connecting structure of the present invention;
FIG. 2 is a schematic top view of the combined structure of the cast-in-place, prefabricated combined bridge upper connecting rail of the present invention;
FIG. 3 is one of the process schematic diagrams of the construction method of the combined structure of the cast-in-place and prefabricated combined bridge upper connecting rail of the utility model;
FIG. 4 is a schematic top view of FIG. 3;
FIG. 5 is a second process diagram of the construction method of the combined cast-in-place and prefabricated bridging structure of the present invention;
FIG. 6 is a schematic top view of FIG. 5;
FIG. 7 is a third process diagram of the construction method of the combined cast-in-place and prefabricated bridging structure of the present invention;
FIG. 8 is a schematic top view of FIG. 7;
FIG. 9 is a fourth process diagram of the construction method of the combined cast-in-place and prefabricated bridging structure of the present invention;
FIG. 10 is a schematic top view of FIG. 9
In the construction process structure diagram, parts of components are omitted as appropriate for the sake of simplicity and clarity of subsequent structures/steps.
Detailed Description
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 merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be described in further detail with reference to the following embodiments.
As a preferred embodiment of the present invention, as shown in fig. 1-2, the present invention provides a new combined structure form of a cast-in-place and prefabricated rail connecting on a bridge, which is used for the rail connecting of a new railway 20 and an existing railway 10 on a bridge, wherein: the large frame comprises a large frame 1 with a cast-in-place structure and a small frame 2 with a prefabricated structure.
The cast-in-place large frame 1 is arranged between two adjacent piers 3 of the existing line 10, the width of the cast-in-place large frame is larger than that of the bridge of the original existing line, and the cast-in-place large frame is eccentrically arranged on the newly built railway 20 towards the outside; the lower part of the large frame 1 is reinforced through a pile foundation 4, and the upper end surface of the large frame is flush with the upper end surface of the pier 3; the two adjacent large frames 1 are connected with each other through cast-in-place concrete extending out of a plurality of pre-embedded reserved steel bar joints 5 and joint belts towards each other in the direction of the outer side of the middle pier 3.
A plurality of prefabricated small frames 2 are transversely arranged on the large frames 1, and span between two adjacent large frames and above the bridge piers 3; a newly built railway 20, an existing line 10 and a turnout device are arranged above the small frame 2 and are used as a bridge between the newly built railway 20 and the existing line 10.
The maximum length of the small frame 2 in the transverse direction of the line is equal to or less than the width of the large frame 1, and the minimum length of the small frame can ensure that a newly-built railway 20, an existing line 10 and a turnout device are arranged.
The small frame 2 comprises a middle small frame 21 and a cross small frame 22; the plurality of middle small frames 21 are arranged right above the large frames 1, and the single crossing small frame 22 is arranged between two adjacent large frames in a crossing manner and supported on the bridge piers 3. Preferably, the lengths of the middle type small frame 21 and the crossing type small frame 22 in the line transverse direction are equal.
As shown in fig. 3-10, the following describes a construction method of the present invention for connecting a newly constructed railway 20 and an existing railway 10 on a bridge, wherein the construction method comprises the following steps:
the method comprises the following steps:
as shown in fig. 3-4, without interrupting the operation of the existing line 10, the pile foundation 4 is constructed between two adjacent piers 3 of the existing line to reinforce the roadbed below the existing line, the large frame 1 is cast on the pile foundation 4 and under the existing line bridge 11, the width of the large frame is larger than that of the existing line bridge 11, and the newly built railway 20 to be built on the outer side is eccentrically arranged; between two adjacent large frames 1, in the direction of the outer side of the pier 3 in the middle, the main reinforcement of the top plate of the large frame 1 extends out, so that the large frame becomes a reserved reinforcement joint 5 for reserving cast-in-place belts of the large frames on two sides. Preferably, in the first step, the pile foundation 4 is constructed by driving a high-pressure jet grouting pile. Preferably, in the first step, the number of the reinforcing bars required to be extended out for the joint is encrypted at the position where the top plate main bar of the large frame 1 is extended out.
Step two:
and synchronously prefabricating a small frame 2 capable of being hoisted in a factory and transporting the small frame to a construction site. Preferably, in the second step, when the small frame 2 is prefabricated, the maximum length of the small frame 2 in the lateral direction of the railway is required to be equal to or less than the width of the large frame 1, and the minimum length thereof can ensure the setting of the newly built railway 20, the existing railway 10 and the switch device. Preferably, in the second step, the small frames 2 are prefabricated in two types, including a middle small frame 21 and a cross small frame 22. Preferably, the lengths of the middle type small frame 21 and the crossing type small frame 22 in the line transverse direction are equal.
Step three:
as shown in fig. 5 to 6, after the large frame 1 to be cast in place reaches the age and the design strength of concrete, temporarily interrupting the operation of the existing line 10, removing the existing line bridge 11 simply supported at the upper part of the pier 3, and chiseling part of the pier body coping so that the elevation of the pier 3 is flush with the top of the large frame 1 (one day is consumed); and (4) finishing construction pouring on the large-frame cast-in-place joint belt (ten days). Newly-built railway and existing railway meet the rail on the bridge, and required width is greater than former roof beam body width, and the cross bridge of existing pier is not enough to the width, can only play the supporting role to the part of little frame, the utility model discloses a cast-in-place joint area of big frame has not only carried out longitudinal connection with the big frame, still provides good support for little frame.
Step four:
as shown in fig. 7-8, after the large frame cast-in-place joint strip reaches the age, the small frames 2 which are hoisted and prefabricated are erected on the large frame 1 to form the longitudinal continuous support of the line, and the longitudinal continuous support is used as the construction foundation of a newly-built railway 20, an existing line 10 and a turnout device and a new bridge (consuming one day). Preferably, in the fourth step, a plurality of the middle small frames 21 are hoisted and erected right above the large frame 1, and a single spanning type small frame 22 is hoisted and spanned between two adjacent large frames and supported on the pier 3. Preferably, in the fourth step, before the cast-in-place joint belt of the large frame reaches the age, a plurality of middle small frames 21 are hoisted and erected right above the large frame 1; and after the large frame cast-in-place joint belt reaches the age, hoisting and spanning the remaining single small spanning frame 22 between two adjacent large frames and supporting the small spanning frame on the pier 3.
Step five:
as shown in fig. 9-10, a second bridge deck including ballast auxiliary works is laid on the small frame 2, a newly-built railway 20, an existing line 10 and a turnout device are constructed, the track laying and the rail connecting are completed, and finally the newly-built railway 20 and the existing line 10 are recovered to be communicated together.
The utility model discloses do not make the restriction to striding the number, to the more condition of striding, construction method is the same, only need increase the same structure can.
As a further preferable mode, the shape of the large frame 1 and/or the small frame 2 in the plan view is selected to be a trapezoid, or a combination of a trapezoid and a rectangle of equal width.
The utility model discloses in, the cast-in-place of macrostructure is gone on under existing line bridge, so can not interrupted existing line operation, and little frame can be prefabricated in step, directly hoists on the macrostructure after prefabricating, need demolish the simple beam of macrostructure top before the hoist and mount, and the time limit for a project can greatly be saved to this kind of prefabricated, cast-in-place mode that combines.
Through the technical scheme, the utility model discloses following showing beneficial effect has been gained:
the utility model provides a novel cast-in-place, prefabricated integrated configuration who combines together connects the rail on the bridge forms the integrated technology for solve the bridging problem, can be very big save construction cycle, reduce existing line shut down time, reduce social cost.
The utility model also provides a brand-new structural style, this structural style uses cast-in-place big frame and prefabricated little frame to be the main structure, has guaranteed the enforceable nature of scheme through reserving the steel bar joint, and the construction that utilizes this structural style to realize bridging the rail and for the engineering has made important innovation.
The utility model discloses a meet rail complete set technique on bridge provides perfect solution for the reconstruction extension engineering of the existing railway line of the same kind, can popularize and apply on a large scale, promotes the development of railway trade.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. The utility model provides a cast-in-place, prefabricated integrated configuration that connects rail on bridge that combines together for newly-built railway (20) and existing line (10) realize the rail on the bridge, its characterized in that:
comprises a large frame (1) with a cast-in-place structure and a small frame (2) with a prefabricated structure;
the cast-in-place large frame (1) is arranged between two adjacent piers (3) of the existing line (10), the width of the cast-in-place large frame is larger than that of the original existing line bridge, and the cast-in-place large frame is eccentrically arranged on the newly built railway (20) towards the outside; the lower part of the large frame (1) is reinforced through a pile foundation (4), and the upper end surface of the large frame is flush with the upper end surface of the pier (3); the two adjacent large frames (1) are connected with each other in the outer side direction of the middle pier (3) by extending a plurality of pre-embedded reserved steel bar joints (5) and cast-in-place concrete of joint belts towards each other;
a plurality of prefabricated small frames (2) are transversely arranged on the large frames (1) and span between two adjacent large frames and above the bridge piers (3); a newly built railway (20), an existing railway (10) and a turnout device are arranged above the small frame (2) and are used as a bridge of the newly built railway (20) and the existing railway (10).
2. A cast in place, pre-cast composite bridging track according to claim 1 in combination with the above method, wherein:
the maximum length of the small frame (2) in the transverse direction of the line is equal to or less than the width of the large frame (1), and the minimum length of the small frame can ensure that a newly-built railway (20), an existing line (10) and a turnout device are arranged.
3. A cast in place, pre-cast composite bridging track according to claim 2, characterised in that:
the small frame (2) comprises a middle small frame (21) and a cross small frame (22);
the plurality of middle small frames (21) are arranged right above the large frames (1), and the single crossing small frame (22) is arranged between every two adjacent large frames in a crossing mode and supported on the bridge piers (3).
4. A cast in place, pre-cast composite bridging track according to claim 3 in combination with the above method, wherein:
the lengths of the middle small frame (21) and the cross small frame (22) in the transverse direction of the circuit are equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120789644.9U CN215104606U (en) | 2021-04-16 | 2021-04-16 | Combined structure of cast-in-place and prefabricated combined bridge upper connecting rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120789644.9U CN215104606U (en) | 2021-04-16 | 2021-04-16 | Combined structure of cast-in-place and prefabricated combined bridge upper connecting rail |
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| Publication Number | Publication Date |
|---|---|
| CN215104606U true CN215104606U (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120789644.9U Active CN215104606U (en) | 2021-04-16 | 2021-04-16 | Combined structure of cast-in-place and prefabricated combined bridge upper connecting rail |
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| CN (1) | CN215104606U (en) |
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- 2021-04-16 CN CN202120789644.9U patent/CN215104606U/en active Active
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