CN112854016A - Protection method for existing railway in jacking process of separated frame-structured bridge - Google Patents
Protection method for existing railway in jacking process of separated frame-structured bridge Download PDFInfo
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- CN112854016A CN112854016A CN202110386925.4A CN202110386925A CN112854016A CN 112854016 A CN112854016 A CN 112854016A CN 202110386925 A CN202110386925 A CN 202110386925A CN 112854016 A CN112854016 A CN 112854016A
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- bridge
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- shaped temporary
- jacking
- temporary beam
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005096 rolling process Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 26
- 239000011148 porous material Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
- E01B2/003—Arrangement of tracks on bridges or in tunnels
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/40—Means or arrangements for temporarily supporting laid tracks, or rails or sleepers in the track
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a protection method for an existing railway in the jacking process of a separated frame-structured bridge, which can carry out quick longitudinal movement and in-place of a D-shaped temporary beam in a construction locking point by using the integral longitudinal movement mode of the D-shaped temporary beam, reduce the interference of driving, shorten the construction period, save the construction cost and ensure the construction safety of a railway business line.
Description
Technical Field
The invention relates to a railway protection method, in particular to a protection method for an existing railway in the jacking process of a separated frame-structured bridge, and belongs to the field of building construction.
Background
In the construction field of changing an existing level crossing into an overpass, most of the construction modes adopt a construction mode of jacking a frame to construct a bridge under an existing railway, a line strengthening mode commonly used for jacking is a D-shaped beam erecting empty line, when a frame adopts a separated construction mode, the construction needs to be carried out for multiple times, the D-shaped beam strengthening needs to be carried out for multiple times, when in the traditional construction operation, a line is jacked into a pore frame to construct a bridge, the D-shaped beam erecting is adopted for strengthening the railway, and when the other pore frame is jacked into another pore frame to construct a bridge, the D-shaped beam erecting is still needed to be erected again to strengthen the line. If the D-shaped temporary beam is erected again in one construction locking point, the construction workload is large, the railway opening delay is easily caused, and if the D-shaped temporary beam is constructed in a plurality of locking points, the slow running time of line reinforcement is long, and the railway transportation is interfered too much.
Disclosure of Invention
The invention aims to solve the technical problem of providing a protection method for an existing railway in the jacking process of a separated frame-structured bridge, and the D-shaped convenient beam can be quickly longitudinally moved to be in place in one construction locking point by using the integral longitudinal movement mode of the D-shaped convenient beam, so that the traffic interference is reduced, the construction period is shortened, the engineering cost is saved, and the construction safety of a railway business line is ensured.
In order to solve the above problems, the specific technical scheme of the invention is as follows: a protection method of an existing railway in a separated frame bridge jacking process is disclosed, and the protection method of the existing railway in the separated frame bridge jacking process comprises the following steps:
step one, prefabricating a separated frame-structured bridge I and a frame-structured bridge II at a working pit position outside an existing railway protection area, and simultaneously erecting a foundation support combination of a D-shaped temporary beam;
step two, erecting a D-shaped temporary beam at the jacking position of the frame bridge I in the railway locking point;
thirdly, jacking the frame bridge I, taking soil and jacking, and excavating earthwork in the frame bridge I while jacking;
fourthly, manufacturing a beam moving rolling rod;
fifthly, in the railway locking point, clearing and leveling railway ballast and other sundries which are influenced in the process of longitudinally moving the D-shaped temporary beam, and dismantling the line from the front end of the D-shaped temporary beam to the position where the D-shaped temporary beam is located for the second time;
placing a beam moving rolling rod;
step seven, dragging the D-shaped temporary beam to a position, corresponding to the line, of the framed bridge II, withdrawing the beam-moving rolling bar, moving the D-shaped temporary beam to a corresponding position, recovering the line, and simultaneously chiseling a foundation support II of the D-shaped temporary beam between the framed bridge I and the framed bridge II;
step eight, jacking the frame to construct a bridge II;
and ninthly, removing the D-shaped temporary beam in the railway locking point and recovering the line.
The foundation support combination in the first step comprises a foundation support I, a foundation support II and a foundation support III, wherein the foundation support I and the foundation support III are symmetrically arranged on two sides of the separated frame structure bridge combination respectively, the foundation support II is erected between the foundation support I and the foundation support III, a beam moving rolling rod is connected between the foundation support I and the top of the frame structure bridge I, and a beam moving rolling rod is connected between the foundation support III and the top of the frame structure bridge II.
The beam moving rolling bar is composed of steel pipes with the diameter of 30cm and the length of 50cm, and C40 concrete is poured in the steel pipes.
In the sixth step, the D-shaped temporary beam is integrally lifted by using a jack, the lifting position is 40cm higher than the position of the D-shaped temporary beam after the D-shaped temporary beam is in place, and beam moving rolling bars are arranged at the two ends and the central position of the single longitudinal beam.
The invention has the following beneficial effects: in the jacking process of the separated frame-structured bridge, the second erection of the D-shaped convenient beam for reinforcing the railway line can be completed in one locking point, the construction method is simple and convenient, the line reinforcing slow-moving time is short, the running interference is reduced, the interference on railway transportation is small, the construction period is shortened while the construction safety of the railway business line is ensured, and the engineering cost is saved.
Drawings
FIG. 1: the D-shaped temporary beam integral longitudinal movement construction scheme is a schematic elevation view.
FIG. 2: and the plane schematic diagram of the D-shaped temporary beam integral longitudinal movement construction scheme.
FIG. 3: d-shaped beam cross section.
Detailed Description
As shown in fig. 1 to 3, when the influence of the crossing and the signal machine causes a narrow terrain, the frame bridge adopts a double-hole separation type fractional jacking construction method, and in order to reduce the slow running time of the railway, a D-shaped temporary beam integral longitudinal movement construction method is adopted, so that the rapid longitudinal movement of the D-shaped temporary beam can be carried out in one construction locking point, the construction period is shortened, the engineering cost is saved, and the construction safety of the railway business line is ensured.
The specific construction steps of this embodiment are as follows:
a protection method for an existing railway in the jacking process of a separated frame-structured bridge comprises the following steps:
firstly, prefabricating a separated frame-structured bridge I1 and a frame-structured bridge II2 at a working pit position outside an existing railway protection area, and simultaneously constructing a foundation support I3, a foundation support II4 and a foundation support III5 of a D-shaped temporary beam 6;
step two, erecting a D-shaped temporary beam 6 at the jacking position of a frame bridge I1 in a railway locking point, and limiting the speed of the train by 45 km/h;
thirdly, jacking the frame structure bridge 1, taking soil and jacking, and excavating earthwork in the frame structure bridge I1 while jacking;
selecting a steel pipe with the diameter of 30cm and the length of 50cm, and pouring C40 concrete in the steel pipe to form a beam moving rolling bar 7;
and fifthly, clearing and leveling the railway ballast and other sundries which influence the longitudinal movement process of the D-shaped temporary beam 6 in the railway locking point. Meanwhile, a line from the front end of the D-shaped temporary beam 6 to the position where the D-shaped temporary beam 6 is located for the second time is dismantled;
step six, integrally lifting the D-shaped temporary beam 6 by using a jack, wherein the lifting position is 40cm higher than the position of the D-shaped temporary beam 6 after the D-shaped temporary beam is in place, and placing beam moving rolling bars 7 at two ends and the central position of the single longitudinal beam;
seventhly, dragging the D-shaped temporary beam 6 to a position, corresponding to a circuit, of the frame bridge II2, withdrawing the beam moving rolling bar 7, enabling the D-shaped temporary beam 6 to reach a corresponding position, recovering the circuit, and simultaneously removing a foundation support II4 of the D-shaped temporary beam 6 between the frame bridge I1 and the frame bridge II 2;
step eight, jacking the frame structure bridge II 2;
and ninthly, dismantling the D-shaped temporary beam 6 in the railway locking point and recovering the line.
What has been described above is merely a preferred embodiment of the invention. It should be noted that variations and modifications can be made by those skilled in the art without departing from the principle of the present invention, and they should also be considered as falling within the scope of the present invention.
Claims (4)
1. A protection method for an existing railway in the jacking process of a separated frame-structured bridge comprises the following steps:
step one, prefabricating a separated frame-structured bridge I (1) and a frame-structured bridge II (2) at a working pit position outside an existing railway protection area, and simultaneously erecting a foundation support combination of a D-shaped temporary beam (6);
secondly, erecting a D-shaped temporary beam (6) at the jacking position of the frame bridge I (1) in the railway locking point;
thirdly, jacking the frame bridge I (1), carrying out soil-eating jacking, and excavating earthwork in the frame bridge I (1) while jacking;
fourthly, manufacturing a beam moving rolling rod (7);
fifthly, in the railway locking point, clearing and leveling the ballast and other sundries which affect the longitudinal movement process of the D-shaped temporary beam (6), and removing the line from the front end of the D-shaped temporary beam (6) to the position where the D-shaped temporary beam (6) is located for the second time;
sixthly, placing a beam moving rolling rod (7);
step seven, dragging the D-shaped temporary beam (6) to a line position corresponding to the frame bridge II (2), withdrawing the beam-moving rolling bar (7), moving the D-shaped temporary beam (6) to a corresponding position, recovering the line, and simultaneously chiseling a foundation support II (4) of the D-shaped temporary beam (6) between the frame bridge I (1) and the frame bridge II (2);
step eight, jacking the frame to construct a bridge II (2);
and ninthly, detaching the D-shaped temporary beam (6) in the railway locking point and recovering the line.
2. The method for protecting the existing railway in the jacking process of the separated frame-structured bridge as claimed in claim 1, wherein: the basic support combination in step one include basic support I (3), basic support II (4) and basic support III (5), basic support I (3) and basic support III (5) symmetry respectively set up and construct bridge combination both sides at disconnect-type frame, erect basic support II (4) between basic support I (3) and basic support III (5), be connected with between basic support I (3) and the frame bridge I (1) top and move roof beam and roll thick stick (7), be connected with between basic support III (5) and the frame bridge II (2) top and move roof beam and roll thick stick (7).
3. The method for protecting the existing railway in the jacking process of the separated frame-structured bridge as claimed in claim 1, wherein: the beam moving rolling bar (7) is composed of a steel pipe with the diameter of 30cm and the length of 50cm, and C40 concrete is poured in the steel pipe.
4. The method for protecting the existing railway in the jacking process of the separated frame-structured bridge as claimed in claim 1, wherein: in the sixth step, the D-shaped temporary beam (6) is integrally lifted by using a jack, the lifting position is 40cm higher than the position of the D-shaped temporary beam (6) after being in place, and beam moving rolling bars (7) are arranged at the two ends and the center of the single longitudinal beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110386925.4A CN112854016A (en) | 2021-04-12 | 2021-04-12 | Protection method for existing railway in jacking process of separated frame-structured bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110386925.4A CN112854016A (en) | 2021-04-12 | 2021-04-12 | Protection method for existing railway in jacking process of separated frame-structured bridge |
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| CN112854016A true CN112854016A (en) | 2021-05-28 |
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| CN202110386925.4A Pending CN112854016A (en) | 2021-04-12 | 2021-04-12 | Protection method for existing railway in jacking process of separated frame-structured bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356092A (en) * | 2021-07-05 | 2021-09-07 | 中铁上海设计院集团有限公司 | Construction method for widening underpass railway frame bridge |
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2021
- 2021-04-12 CN CN202110386925.4A patent/CN112854016A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356092A (en) * | 2021-07-05 | 2021-09-07 | 中铁上海设计院集团有限公司 | Construction method for widening underpass railway frame bridge |
| CN113356092B (en) * | 2021-07-05 | 2023-08-15 | 中铁上海设计院集团有限公司 | Construction method for widening underpass railway frame bridge |
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Application publication date: 20210528 |
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