CN108951440A - The safeguard structure and protection construction method of existing roadbed in a kind of construction of extension culvert - Google Patents
The safeguard structure and protection construction method of existing roadbed in a kind of construction of extension culvert Download PDFInfo
- Publication number
- CN108951440A CN108951440A CN201810889642.XA CN201810889642A CN108951440A CN 108951440 A CN108951440 A CN 108951440A CN 201810889642 A CN201810889642 A CN 201810889642A CN 108951440 A CN108951440 A CN 108951440A
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- China
- Prior art keywords
- existing
- culvert
- steel sheet
- sheet pile
- roadbed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010276 construction Methods 0.000 title claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 58
- 239000010959 steel Substances 0.000 claims abstract description 58
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 239000000284 extract Substances 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 230000007480 spreading Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 230000032258 transport Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
Abstract
The invention discloses the safeguard structures of existing roadbed in a kind of construction of extension culvert, including existing culvert ontology, the two sides of its entrance are existing roadbed side slope, Larsen steel sheet pile has continuously been squeezed at roadbed side slope, the plane and existing culvert central axis that the Larsen steel sheet pile is formed are in 45 ° of angles, and the starting point of continuous Larsen steel sheet pile is apart from existing line center line 3.5m, and end is located at the slope foot of roadbed side slope.Disclosed safeguard structure, not only adaptable, protection safety performance is good, and construction cost is low, short construction period.
Description
Technical field
A kind of the present invention relates to construction of railways field more particularly to railways in the construction of Business Line extension culvert existing road
The safeguard structure and protection construction method of base.
Background technique
With the fast development of economic society, railway passenger and goods flow also increases substantially, and both wired speed of service was low, transports
Disadvantage of poor quality, that route transportation capability is small is increasingly prominent, and the transport capacity of major part existing railway has been not suitable with transport and has increased
Long needs.Therefore, the transport capacity to improve existing railway, it is necessary to which capacity expansion revamping is carried out to it.Both wired capacity expansion revamping
Mainly having speed-raising both wired, double tracking expansion that can raise speed and create two-wire expansion the modes such as can raise speed, and principle is avoids greatly
It tears open and changes greatly, selects the scheme that good in economic efficiency, shipping mass is high, small to both wired influence on system operation under the major premise of save the cost.
In existing railway capacity expansion revamping and yard, stock yard reconstruction construction, it is often necessary to carry out spreading to existing culvert and apply
Work is removed newly-built to meet new needs.It is guarantee existing railway roadbed when the neighbouring existing extension culvert of Business Line is constructed at present
Stabilization, prevent roadbed from cave-in accident occur, do not influence train normal operation, it is necessary to using temporary preventive measure to existing roadbed
It is protected.
General safeguard procedures are using the methods of artificial digging pile, rotary digging drilling hole stake, rail pile and I-steel, wherein manually
It is be easy to cause collapse hole accident when caisson, rotary digging drilling hole pile driving construction, construction period is longer, and project cost is higher and to railways train operation
It influences big；Rail pile and the anti-dynamic load interference performance of steel H pile are poor, and strength of the mixing pile is lower to be difficult to ensure that existing roadbed is steady
The disadvantages of determining, influencing Business Line operation security.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of short construction period, project cost is low and protection effect is good
The safeguard structure of existing roadbed in extension culvert construction.
The technical scheme to solve the above technical problems is that in a kind of construction of extension culvert existing roadbed protection
Structure, including existing culvert ontology, the two sides of entrance are existing roadbed side slope, have continuously squeezed into Larsen at roadbed side slope
Steel sheet pile, the plane and existing culvert central axis which forms are in 45 ° of angles, and continuous Larsen steel sheet pile
Starting point is apart from existing line center line 3.5m, and end is located at the slope foot of roadbed side slope.
Preferably, the half that the embedded depth of the Larsen steel sheet pile is long not less than stake.
Preferably, the Larsen steel sheet pile of two sides is arranged symmetrically with existing culvert central axes.
The protection construction method of existing roadbed, includes the following steps: in a kind of construction of extension culvert
A, according to existing roadbed banket type and compartment load determines the length and embedded depth of Larsen steel sheet pile,
The gradient and height for measuring existing roadbed determine the integral planar position and single Larsen steel sheet pile of Larsen steel sheet pile
Model；
B, using train travel gap, the railway protective fence at roadbed side slope is removed, smooth piling machine place, to piling position
Carry out orientation measurement is set, while one Displacement & Settlement stake is set at interval of 5m at the roadbed road shoulder of existing culvert two sides,
Using total station, coordinate and elevation before level observation is driven piles；
C, the underground utilities that construction is nearby influenced on culvert, which move, to be changed, protects, and is then drawn using high-frequency hydraulic hammer
The piling of gloomy steel sheet pile operates, and the Larsen steel sheet pile of initial position is apart from existing line center line 3.5m, the Larsen steel plate of end
Stake is located at roadbed side slope slope foot, and the Larsen steel sheet pile squeezed into and culvert center line are in 45 ° of angles；
D, during piling, horizontal displacement is carried out to each Displacement & Settlement stake every 1h and sedimentation value is observed, observed
It is worth in allowed band and continues pile sinking, otherwise stops work and reinforce；
E, extension culvert construction is carried out after the completion of piling, and after constructing to extension culvert, Buried culvert under roadbed changeover portion is returned
It fills out, then extracts Larsen steel sheet pile.
Preferably, the vibration force of the high-frequency hydraulic hammer is not less than 220KN.
The safeguard structure and construction method of existing roadbed, have such as in a kind of disclosed extension culvert construction
It is lower the utility model has the advantages that
This structure is suitable for existing subgrade protection during running railway line construction extension culvert, especially in Subgrade of Heavy-haul Railway
When side slope bears the interference of larger dynamic load, good protection work can be played by (entering) mouth two sides roadbed side slope out to existing culvert
With；One-shot job place required for constructing is smaller, so do not limited by construction site size, strong applicability；
This structure uses Larsen steel sheet pile as existing roadbed reinforced protection stake, using it with high the moment of inertia, high intensity
Can, to increase the rigidity of sheet pile wall, displacement deformation is effectively reduced, can guarantee the safety that existing roadbed side slope is reinforced
Energy；Using the concept of steel sheet pile " plate-board combining structure ", so that steel sheet pile conjoined structure tight, can guarantee existing roadbed
The protection effect of slope reinforcement improves the security performance and protection effect of protection；
It for steel sheet pile inserting piling, is operated using high-frequency hydraulic hammer, entire piling technology is mature, requires not construction site
Height, construction is flexibly, conveniently；Steel sheet pile inserting piling about 7 ~ 9min of every 9m long, and the steel sheet pile construction time about 7 of every culvert
Hour completes, and substantially reduces construction period；
Protect steel sheet pile used that can extract after engineering, recycled for multiple times, overall economic benefit is good, and work is greatly saved
Journey investment.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, in all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the floor plan of subgrade protection structure of the present invention；
Fig. 2 is the skiagraph of subgrade protection structure of the present invention.
Appended drawing reference:
The existing culvert ontology of 1-, 2- spreading culvert, 3- Larsen steel sheet pile, 4- top plate, 5- bottom plate, 6- wall, the existing roadbed side 7-
Slope, the existing culvert central axes 8-, 9- existing line center line.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
If Fig. 1 shows, the safeguard structure of existing roadbed in a kind of disclosed extension culvert construction, including existing culvert
Hole ontology 1, spreading culvert 2 and continuous Larsen steel sheet pile 3, wherein existing culvert ontology and spreading culvert all have top plate 4,
Bottom plate 5 and two sides wall 6 select existing entrance side or outlet side with culvert to carry out spreading construction in spreading, will connect
The top plate of long culvert is connect with the top plate of existing culvert, and the bottom plate of spreading culvert is connect with the bottom plate of existing culvert, spreading culvert
Two sides wall connect with the two sides wall of existing culvert, whole spreading is formed, for the existing of existing culvert entrance two sides
Roadbed side slope 7 applies man-hour requirement in spreading and carries out subgrade protection, Larsen steel sheet pile, and two sides are continuously squeezed into roadbed side slope
It is arranged symmetrically with existing culvert central axes 8, the plane and existing culvert central axis that continuous Larsen steel sheet pile is formed are pressed from both sides in 45 °
Angle, and the starting point of continuous Larsen steel sheet pile is 3.5m apart from existing line center line 9, and end is located at the slope of roadbed side slope
At foot.
The Larsen steel sheet pile is when squeezing into, the embedded depth half long not less than stake.
The protection construction method of existing roadbed, includes the following steps: in a kind of construction of extension culvert
A, according to existing roadbed banket type and compartment load determines the length and embedded depth of Larsen steel sheet pile,
The gradient and height for measuring existing roadbed determine the integral planar position and single Larsen steel sheet pile of Larsen steel sheet pile
Model, in which: the length of Larsen steel sheet pile is calculated using the method for cantilever beam, according to the height of foundation bottom to road shoulder
Degree, the type of banketing of existing roadbed, every section railway carriage are fully loaded with gross weight, calculate the internal friction angle of unearthed conversion bulk density and soil,
And then calculate coefficient of active earth pressure and coefficient of passive earth pressure；Geometrical relationship after being buried according to stake calculates steel sheet pile
Anchorage length；Unearthed comprehensive pressure coefficient is calculated by the sum of various soil pressures, calculates stake further according to Bu Shi theoretical curve
Embedded depth；Single steel plate pile length is the embedded depth that basic bottom adds stake to the height of road shoulder, and single Larsen steel plate
The model selection of stake is to be obtained by checking maximal bending moment suffered by single stake with shearing；
B, using train travel gap, the railway protective fence at roadbed side slope is removed, smooth piling machine place, to piling position
Carry out orientation measurement is set, while being spaced 5m at the roadbed road shoulder of existing culvert two sides and Displacement & Settlement stake is set, is utilized
Total station, coordinate and elevation before level observation is driven piles；
C, the underground utilities that construction is nearby influenced on culvert, which move, to be changed, protects, and is then drawn using high-frequency hydraulic hammer
The piling of gloomy steel sheet pile operates, and the vibration force of high-frequency hydraulic hammer is not less than 220KN, the Larsen steel sheet pile of initial position away from
From existing line center line 3.5m, Larsen steel sheet pile that the Larsen steel sheet pile of end is located at roadbed side slope slope foot, and squeezes into
Culvert center line is in 45 ° of angles；
D, during piling, horizontal displacement is carried out to each Displacement & Settlement stake every 1h and sedimentation value is observed, observed
It is worth in allowed band and continues pile sinking, otherwise stops work and reinforce；
E, extension culvert construction is carried out after the completion of piling to be returned Buried culvert under roadbed changeover portion after band extension culvert construction
It fills out, then extracts Larsen steel sheet pile.
Work progress is described in detail with one embodiment below
Certain engineering is 1.4 × 4.7m frame culvert spreading length 20.08m, and in 90 ° with railway center line, existing roadbed uses
Drift-sand fills, roadbed height 3m, the specific steps are as follows:
1) dynamic load according to caused by the Roadbed Soil type and train operation, which determines, uses IV type Larsen steel sheet pile, average stake
Long 9m；Larsen steel sheet pile embedded depth is not less than long 0.5 times of stake；Steel sheet pile position was both wired from existing culvert culvert body lateral extent
Lu Zhizheng line 3.5m is extended at roadbed slope foot with culvert central axis angle at 45 °；
2) train travel gap is utilized, removing and change to move to railway protective fence at roadbed slope foot does not influence outside construction area,
Smooth piling machine place；Unwrapping wire is measured to pile driving position；It is arranged at the existing roadbed road shoulder in culvert two sides every 5m and is displaced
Settlement observation stake, using coordinate and elevation before total station, level observation piling position；
3) high-front shovel changes the outfit hydraulic high-frequency vibratory hammer, keeps piling machinery in place, wherein vibration hammer exciting force is not less than
220kN；
4) underground utilities before piling near exploration culvert, move to the pipeline for influencing construction and change, protect, move change finish it is laggard
Row pile sinking operation carries out horizontal displacement, settlement observation to each observation stake every 1h in operation process, observes data in allowed band
Interior continuation pile sinking, on the contrary it stops work immediately and other measures is taken to be reinforced；
5) it is finished to extension culvert construction, after the completion of road -culvert approach section backfill, extracts steel sheet pile, construction finishes.
Currently, existing extension culvert construction is affected to railway normal operation, do not carried out due to construction safety protection and
Loss caused by causing train operation to be interrupted is inestimable, if during Business Line construction extension culvert both by this railway
There is subgrade protection construction method to be applied to other similar engineering, not only greatly saves the investment of engineering itself, but also can be effective
Reduction train operation because of caused by construction interrupt, and then reduce economic loss resulting from.Structure of the present invention is made
For a security protection system, preventing train from overturning, the major accidents such as derailing, convenient transportation guarantees operation security etc.
It is of great significance.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.
Claims (5)
1. the safeguard structure of existing roadbed in a kind of extension culvert construction, including existing culvert ontology, the two sides of entrance
For existing roadbed side slope, it is characterised in that: continuously squeezed into Larsen steel sheet pile at roadbed side slope, which forms flat
Face and existing culvert central axis are in 45 ° of angles, and the starting point of continuous Larsen steel sheet pile is apart from existing line center line
3.5m, and end is located at the slope foot of roadbed side slope.
2. the safeguard structure of existing roadbed in a kind of extension culvert construction according to claim 1, it is characterised in that: described
The embedded depth of the Larsen steel sheet pile half long not less than stake.
3. the safeguard structure of existing roadbed in a kind of extension culvert construction according to claim 1, it is characterised in that: two sides
Larsen steel sheet pile be arranged symmetrically with existing culvert central axes.
4. a kind of protection construction method based on structure described in claim 1, it is characterised in that include the following steps:
A, according to existing roadbed banket type and compartment load determines the length and embedded depth of Larsen steel sheet pile,
The gradient and height for measuring existing roadbed determine the integral planar position and single Larsen steel sheet pile of Larsen steel sheet pile
Model；
B, using train travel gap, the railway protective fence at roadbed side slope is removed, smooth piling machine place, to piling position
Carry out orientation measurement is set, while being spaced 5m at the roadbed road shoulder of existing culvert two sides and Displacement & Settlement stake is set, is utilized
Total station, coordinate and elevation before level observation is driven piles；
C, the underground utilities that construction is nearby influenced on culvert, which move, to be changed, protects, and is then drawn using high-frequency hydraulic hammer
The piling of gloomy steel sheet pile operates, and the Larsen steel sheet pile of initial position is apart from existing line center line 3.5m, the Larsen steel plate of end
Stake is located at roadbed side slope slope foot, and the Larsen steel sheet pile squeezed into and culvert center line are in 45 ° of angles；
D, during piling, horizontal displacement is carried out to each Displacement & Settlement stake every 1h and sedimentation value is observed, observed
It is worth in allowed band and continues pile sinking, otherwise stops work and reinforce；
E, extension culvert construction is carried out after the completion of piling to be returned Buried culvert under roadbed changeover portion after band extension culvert construction
It fills out, then extracts Larsen steel sheet pile.
5. the protection construction method of existing roadbed in a kind of extension culvert construction according to claim 4, it is characterised in that:
The vibration force of the high-frequency hydraulic hammer is not less than 220KN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810889642.XA CN108951440A (en) | 2018-08-07 | 2018-08-07 | The safeguard structure and protection construction method of existing roadbed in a kind of construction of extension culvert |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810889642.XA CN108951440A (en) | 2018-08-07 | 2018-08-07 | The safeguard structure and protection construction method of existing roadbed in a kind of construction of extension culvert |
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| Publication Number | Publication Date |
|---|---|
| CN108951440A true CN108951440A (en) | 2018-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810889642.XA Pending CN108951440A (en) | 2018-08-07 | 2018-08-07 | The safeguard structure and protection construction method of existing roadbed in a kind of construction of extension culvert |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113293665A (en) * | 2021-06-02 | 2021-08-24 | 新疆铁道勘察设计院有限公司 | Roadbed reinforcing method for long side of railway bridge and culvert connection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005139680A (en) * | 2003-11-05 | 2005-06-02 | Maeda Corp | Sheet pile-type revetment structure and its construction method |
| KR20090016045A (en) * | 2007-08-10 | 2009-02-13 | 최광욱 | Waterway culvert using steel sheet piles and its construction method |
| CN106284366A (en) * | 2015-05-25 | 2017-01-04 | 五冶集团上海有限公司 | External pulling type Larsen steel sheet pile reinforcement means |
| CN208748543U (en) * | 2018-08-07 | 2019-04-16 | 中铁株洲桥梁有限公司 | The safeguard structure of existing roadbed in a kind of construction of extension culvert |
-
2018
- 2018-08-07 CN CN201810889642.XA patent/CN108951440A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005139680A (en) * | 2003-11-05 | 2005-06-02 | Maeda Corp | Sheet pile-type revetment structure and its construction method |
| KR20090016045A (en) * | 2007-08-10 | 2009-02-13 | 최광욱 | Waterway culvert using steel sheet piles and its construction method |
| CN106284366A (en) * | 2015-05-25 | 2017-01-04 | 五冶集团上海有限公司 | External pulling type Larsen steel sheet pile reinforcement means |
| CN208748543U (en) * | 2018-08-07 | 2019-04-16 | 中铁株洲桥梁有限公司 | The safeguard structure of existing roadbed in a kind of construction of extension culvert |
Non-Patent Citations (1)
| Title |
|---|
| 李武斌: "桥涵接长施工中线路安全防护及其技术措施", 西部探矿工程, no. 08, 25 August 2005 (2005-08-25), pages 2 - 3 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113293665A (en) * | 2021-06-02 | 2021-08-24 | 新疆铁道勘察设计院有限公司 | Roadbed reinforcing method for long side of railway bridge and culvert connection |
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