CN111021415A - Construction structure and method for transition beam of railway underpass type frame bridge - Google Patents
Construction structure and method for transition beam of railway underpass type frame bridge Download PDFInfo
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- CN111021415A CN111021415A CN202010011605.6A CN202010011605A CN111021415A CN 111021415 A CN111021415 A CN 111021415A CN 202010011605 A CN202010011605 A CN 202010011605A CN 111021415 A CN111021415 A CN 111021415A
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- 230000007704 transition Effects 0.000 title claims abstract description 72
- 238000010276 construction Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title description 14
- 241001669679 Eleotris Species 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 6
- 239000002023 wood Substances 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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Abstract
The invention is suitable for the technical field of railway construction, and provides a construction structure of a transition beam of a railway underpassing frame bridge, which comprises longitudinal beams, sleeper beams and transition beams, wherein two adjacent longitudinal beams are connected through the sleeper beams, the longitudinal beams are supported by a plurality of transition beams, the transition beams are supported by a plurality of fulcrum piles arranged along the length direction of the transition beams, and pulleys or slide rails matched with the frame bridge are arranged on the transition beams, so that the construction structure has the beneficial effects that: the transition beam has stable structure through the structural design of the transition beam, and can be assembled and constructed on site, the construction of the hollow structure of the transition beam can be completed at one time, and the requirement of high-efficiency construction of a frame bridge is met.
Description
Technical Field
The invention relates to the technical field of railway construction, in particular to a construction structure and a construction method for a transition beam of a railway underpass type frame bridge.
Background
At present, two methods are used for overhead reinforcing lines in the construction of adding and reconstructing bridges and culverts of railway business lines: a longitudinal cantilever and transverse lifting method and a D-shaped construction beam-erecting method.
The longitudinal and transverse beam lifting method is to lift the line by using a longitudinal and transverse structure formed by using a rail beam and I-steel as longitudinal beams and using H-steel as a transverse beam. The advantages are that: the longitudinal beam can be long, and the line reinforcing range is large; the application range is wide, the method is not limited by line spacing, curve radius and the like, and the method can be used for reinforcing lines such as interval lines, station lines, turnouts and the like; the disadvantages are that: the allowable span of the longitudinal beam (the rail beam) is small, the number of transverse lifting beams (H-shaped steel) is large, the number of connecting parts of the longitudinal beam and the transverse beam is large, the structure is complex, and the stability is poor; the transverse lifting beam is directly arranged on the roadbed, stable and reliable supporting points are not provided, the roadbed is easy to collapse in the process of excavating the roadbed jacking frame, the structure is unstable, the driving safety is endangered, and the influence on transportation is large.
The D-shaped construction beam erecting method is a temporary overhead method of a line which is widely applied at present, has four spans of D12, D16, D20 and D24, and has the advantages that: the bridge deck has simple and stable structure, safety and reliability. The disadvantages are that: the D-shaped construction temporary beam is a simply supported beam, the maximum span is 24m, when the porous large-span overpass is jacked for construction, lines need to be blocked for multiple times, construction temporary beam operation is carried out for erection and longitudinal movement, the number of skylights is large, the chronic time is long, and the transportation interference is large; the method can not be used under the condition that the line spacing of a double-line railway section is small, and can not be used in a turnout section; the longitudinal beam of the D-shaped construction temporary beam is large in size and mass, large-scale mechanical construction is needed in hoisting, transporting and erecting construction, and construction safety risk is large.
Disclosure of Invention
The embodiment of the invention aims to provide a construction structure and a construction method for a transition beam of a railway underpass type frame bridge, and aims to overcome the defects of overhead reinforced lines in the construction of additional construction and reconstruction of bridges and culverts of railway business lines in the prior art.
The embodiment of the invention is realized in such a way that the construction structure of the transition beam of the railway underpass type frame bridge comprises longitudinal beams, sleeper beams and transition beams, wherein two adjacent longitudinal beams are connected through the sleeper beams, the longitudinal beams are supported by a plurality of transition beams, the transition beams are supported by a plurality of fulcrum piles arranged along the length direction of the transition beams, and pulleys or slide rails matched with the frame bridge are arranged on the transition beams.
As a further scheme of the invention: and a support is arranged at the matching part of the fulcrum pile and the transition beam, and the support supports the transition beam.
As a still further scheme of the invention: and the intersection positions of the longitudinal beams and the transition beams are provided with anchoring devices, and the anchoring devices are connected with connecting pieces arranged on the fulcrum piles.
As a still further scheme of the invention: the longitudinal beams are provided with assembling devices, and the assembling devices are used for increasing the length of the adjacent longitudinal beams.
As a still further scheme of the invention: and the end part of the longitudinal beam is supported in an auxiliary manner through steel and wood supports.
The invention also aims to provide a construction method of the transition beam of the railway underpass type frame bridge, which comprises the following steps:
s1, setting a temporary pivot and erecting a longitudinal beam;
s2, constructing the fulcrum pile, excavating an operation channel under the longitudinal beam, and constructing the fulcrum pile;
s3, penetrating a transition beam, arranging a support at the top of a fulcrum pile, penetrating the transition beam into the bottom of a longitudinal beam, fixing the transition beam and the longitudinal beam by using a U-shaped bolt, adjusting the fulcrum, supporting the weight by using the fulcrum pile, and removing a temporary fulcrum;
s4, pushing the frame bridge, enabling the railway line to be supported by the adjacent fulcrum piles and the frame bridge through the transition beam, enabling the frame bridge to be in sliding fit with the transition beam through a pulley or a slide rail, enabling the frame bridge to move along the length direction of the cross-lifting beam group, enabling the fulcrum pile closest to the frame bridge to be dismantled before the frame bridge acts, excavating the roadbed, and reciprocating in the same way until the frame bridge moves to a set position;
and S5, dismantling the transition beam structure and recovering the ballast line.
Compared with the prior art, the invention has the beneficial effects that: the transition beam has stable structure through the structural design of the transition beam, and can be assembled and constructed on site, the construction of the transition beam can be completed at one time, and the requirement of high-efficiency construction of a frame bridge is met.
Drawings
FIG. 1 is a plan view of the present invention;
FIG. 2 is an elevational view of the present invention;
FIG. 3 is a schematic illustration of steps 1 in an embodiment of the present invention;
FIG. 4 is a schematic illustration of the steps in an embodiment of the present invention 2;
FIG. 5 is a schematic illustration of steps in an embodiment of the present invention 3;
FIG. 6 is a schematic diagram of steps in an embodiment of the present invention 4.
In the drawings: 1-longitudinal beam, 2-fulcrum pile, 3-transition beam, 4-steel-wood support, 5-sleeper beam and 6-frame bridge.
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.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
As shown in fig. 1-2, a structure diagram of a construction structure of a transition beam of a railway underpass frame bridge provided by an embodiment of the present invention includes longitudinal beams 1, transition beams 3 and sleeper beams 5, two adjacent longitudinal beams 1 are connected by the sleeper beam 5, the longitudinal beams 1 are supported by a plurality of transition beams 3, the transition beams 3 are supported by a plurality of fulcrum piles 2 arranged along the length direction thereof, and the transition beams 3 are provided with pulleys or slide rails matched with a frame bridge 6. And a support is arranged at the matching position of the fulcrum pile 2 and the transition beam 3, and the support supports the transition beam 3.
The reinforced concrete poured frame bridge 6 can be pushed in along the length direction of the transition beam 3 in a sliding fit mode through the pulleys or the sliding rails and the transition beam 3, and finally the frame bridge 6 moves to a set position to complete construction.
Specifically, the intersections of the longitudinal beams 1 and the frame bridges 6 are provided with anchoring devices, and the anchoring devices are connected with connecting pieces arranged on the fulcrum piles 2 to realize the fastening of the whole structure. For example in practical application, anchor can be the nut, and the connecting piece can be the screw rod, and the screw rod is pre-buried in fulcrum stake 2 and wear out longeron 1 surface, with nut fixed connection, this kind of design helps promoting overall structure's stability.
As shown in fig. 1 to 2, as a preferred embodiment of the present invention, a splicing device is disposed on a longitudinal beam 1, the splicing device may be a splicing plate, the splicing device is used to increase the length of an adjacent longitudinal beam 1, but the length increase or lengthening needs to meet a limit condition, and the longitudinal beam 1 is generally a standard structure with a large moment of inertia.
And when a plurality of longerons 1 are being lengthened, in order to guarantee the stability of structure, can also carry out the auxiliary stay through steel-wood support 4 at the tip position of longeron 1 to guarantee joint strength and structural stability.
As shown in fig. 3 to 6, an embodiment of the present invention further provides a method for constructing a transition beam of a railway underpass frame bridge, which specifically includes the following steps:
s1, setting a temporary fulcrum, erecting a longitudinal beam 1, specifically, measuring and setting out according to a construction scheme, blocking a line, penetrating a sleeper beam 5 between existing sleepers, installing the longitudinal beam 1, and adjusting the fulcrum of the longitudinal beam to stress the longitudinal beam 1;
s2, constructing the fulcrum pile 2, excavating an operation channel under the longitudinal beam 1, and constructing the fulcrum pile 2;
s3, penetrating the transition beam 3, arranging a support at the top of the fulcrum pile 2, penetrating the transition beam 3 into the bottom of the longitudinal beam 1, fixing the transition beam and the longitudinal beam by using a U-shaped bolt, adjusting the fulcrum, supporting the weight by using the fulcrum pile 2, and removing the temporary fulcrum;
s4, pushing a frame bridge 6, enabling an on-bridge line to be supported by adjacent fulcrum piles and the frame bridge through a transition beam 3, enabling the frame bridge 6 to be in sliding fit with the transition beam 3 through a pulley or a slide rail, pulling the frame bridge 6 to move along the length direction of the transition beam 3, detaching the fulcrum pile 2 closest to the frame bridge 6 before the frame bridge 6 acts, excavating a roadbed, and repeating the steps until the frame bridge 6 moves to a set position, wherein as can be seen from the drawings of 3-6, when the frame bridge 6 starts to move, the fulcrum pile 2 blocked in the moving direction needs to be detached, then the frame bridge 6 is pushed to the position of the next fulcrum pile 2 under the action of traction force, detaching the fulcrum pile 2 and excavating the roadbed, and repeating the steps until the frame bridge 6 moves to the set position.
And S5, dismantling the transition beam structure and recovering the ballast line.
Examples
Taking the construction of penetrating through a Kyoto line K593 frame bridge under the Lijiang road of the completed Neze city in 2018 as an example for comprehensive benefit comparison:
the newly-built Lijiang road underneath-crossing Jingjiu railway overpass in Neze city is a 10m +12m +12m +10m separated reinforced concrete framed bridge, the length is 48.90m along the railway direction, the length is 14.70m vertical to the railway direction, the skew angle between the axis of the framed bridge and the normal of the railway line is 6.5 degrees, and the total height of the frame structure is 8.45 m.
Introduction of construction scheme
D-shaped construction beam-erecting scheme
According to the original design, the beam is constructed by 20 times of overhead lines and 13 steps by adopting 4 holes D24 and 4 holes D16.
2. Transition beam structure scheme
The transition beam scheme is that a 6X 12m =72 m X70 steel beam is adopted to bridge an empty line on a Beijing nine uplink and downlink line respectively, then fulcrum pile construction and transition beam penetration are carried out under the steel beam, four-hole frame bridges are synchronously and sequentially jacked, and construction is carried out in 6 steps.
Second, the comparative analysis of the comprehensive benefits is shown in Table 1
The contrast shows that the overhead line with the transition beam structure is jacked into the reinforced concrete frame bridge, the construction process is simple, the interference to railway transportation is small, the construction period is short, the cost is low, and the benefit is very obvious.
Claims (6)
1. The utility model provides a formula frame bridge transition roof beam construction structures is worn under railway, includes longeron, sleeper beam and transition roof beam, adjacent two connect through the sleeper beam between the longeron, the longeron is supported by a plurality of transition roof beams, and the transition roof beam is supported by a plurality of fulcrum stake of arranging along its length direction, all be equipped with on the transition roof beam with frame bridge matched with coaster or slide rail.
2. The construction structure of the transition beam of the railway underpass frame bridge as claimed in claim 1, wherein a support is arranged at the joint of the fulcrum pile and the transition beam, and the support supports the transition beam.
3. The construction structure of the transition beam of the railway underpass frame bridge as claimed in claim 1, wherein the longitudinal beam and the frame bridge are provided with anchoring devices at the crossing points, and the anchoring devices are connected with the connecting pieces arranged on the fulcrum piles.
4. The construction structure of the transition beam of the railway underpass frame bridge as claimed in claim 1, 2 or 3, wherein the longitudinal beams are provided with assembling devices, and the assembling devices are used for realizing the length increase of the adjacent longitudinal beams.
5. The construction structure of the transition beam of the railway underpass frame bridge as claimed in claim 4, wherein the end position of the longitudinal beam is supported by steel-wood support.
6. A construction method of a transition beam of a railway underpass type frame bridge is characterized by comprising the following steps:
s1, setting a temporary pivot and erecting a longitudinal beam;
s2, constructing the fulcrum pile, excavating an operation channel under the longitudinal beam, and constructing the fulcrum pile;
s3, penetrating a transition beam, arranging a support at the top of a fulcrum pile, penetrating the transition beam into the bottom of a longitudinal beam, fixing the transition beam and the longitudinal beam by using a U-shaped bolt, adjusting the fulcrum, supporting the weight by using the fulcrum pile, and removing a temporary fulcrum;
s4, pushing the frame bridge in, wherein the frame bridge is supported by two adjacent transition beams, the frame bridge is in sliding fit with the transition beams through a pulley or a slide rail, the frame bridge is drawn to move along the length direction of the transition beams, the pivot pile closest to the frame bridge is removed before the frame bridge acts, a roadbed is excavated, and the steps are repeated until the frame bridge moves to a set position;
and S5, dismantling the transition beam structure and recovering the ballast line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010011605.6A CN111021415A (en) | 2020-01-06 | 2020-01-06 | Construction structure and method for transition beam of railway underpass type frame bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010011605.6A CN111021415A (en) | 2020-01-06 | 2020-01-06 | Construction structure and method for transition beam of railway underpass type frame bridge |
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| CN111021415A true CN111021415A (en) | 2020-04-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111549827A (en) * | 2020-05-22 | 2020-08-18 | 浙江大学建筑设计研究院有限公司 | Basement bottom plate passes through transition beam connected node with underground continuous wall |
| CN111809471A (en) * | 2020-07-23 | 2020-10-23 | 中国建筑第五工程局有限公司 | Roadbed protection thrust structure at outlet end of pushing frame bridge and construction process thereof |
| CN111926710A (en) * | 2020-07-29 | 2020-11-13 | 中铁二十局集团第六工程有限公司 | Overhead fixing device for multi-track railway |
| CN112854016A (en) * | 2021-04-12 | 2021-05-28 | 铁道第三勘察设计院有限公司 | Protection method for existing railway in jacking process of separated frame-structured bridge |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926299A (en) * | 2012-11-19 | 2013-02-13 | 房士杰 | Railway elevating and fixing device and railway bridge and culvert construction method adopting railway elevating and fixing device |
| CN203855866U (en) * | 2014-06-03 | 2014-10-01 | 中铁二十局集团第四工程有限公司 | Large-span frame bridge overhead roof with beams convenient to construct |
| CN205857044U (en) * | 2016-07-28 | 2017-01-04 | 秦皇岛中科铁路钢结构有限公司 | A kind of novel construction beam |
-
2020
- 2020-01-06 CN CN202010011605.6A patent/CN111021415A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926299A (en) * | 2012-11-19 | 2013-02-13 | 房士杰 | Railway elevating and fixing device and railway bridge and culvert construction method adopting railway elevating and fixing device |
| CN203855866U (en) * | 2014-06-03 | 2014-10-01 | 中铁二十局集团第四工程有限公司 | Large-span frame bridge overhead roof with beams convenient to construct |
| CN205857044U (en) * | 2016-07-28 | 2017-01-04 | 秦皇岛中科铁路钢结构有限公司 | A kind of novel construction beam |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111549827A (en) * | 2020-05-22 | 2020-08-18 | 浙江大学建筑设计研究院有限公司 | Basement bottom plate passes through transition beam connected node with underground continuous wall |
| CN111809471A (en) * | 2020-07-23 | 2020-10-23 | 中国建筑第五工程局有限公司 | Roadbed protection thrust structure at outlet end of pushing frame bridge and construction process thereof |
| CN111809471B (en) * | 2020-07-23 | 2024-06-04 | 中国建筑第五工程局有限公司 | Pushing frame bridge outlet end roadbed protection thrust structure and construction process thereof |
| CN111926710A (en) * | 2020-07-29 | 2020-11-13 | 中铁二十局集团第六工程有限公司 | Overhead fixing device for multi-track railway |
| CN112854016A (en) * | 2021-04-12 | 2021-05-28 | 铁道第三勘察设计院有限公司 | Protection method for existing railway in jacking process of separated frame-structured bridge |
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Application publication date: 20200417 |