CN107542016A - A kind of dam filling construction for controlling roadbed differential settlement - Google Patents
A kind of dam filling construction for controlling roadbed differential settlement Download PDFInfo
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- CN107542016A CN107542016A CN201710677663.0A CN201710677663A CN107542016A CN 107542016 A CN107542016 A CN 107542016A CN 201710677663 A CN201710677663 A CN 201710677663A CN 107542016 A CN107542016 A CN 107542016A
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- grids
- roadbed
- construction
- blotter
- differential settlement
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Abstract
The invention discloses a kind of dam filling construction for controlling roadbed differential settlement, comprise the following steps, first, clear up the fertile soil and organoclay of foundation surface, earthing buries electrical conduits and drainage pipeline, secondly, roadbed both sides set datum line, lay drill rod hanging wire control elevation, then, from substrate, alternatively layered laying F2 grid layers and blotter up to height needed for practice of construction, finally lay graded broken stone, pave asphalt concrete layer on graded broken stone on blotter from the bottom to top.Dam filling construction provided by the invention is in order at the consideration to the security, comfortableness in track, subgrade strengthening processing is carried out using F2 grid materials before soft base construction is carried out, track subgrade strength can be improved, effectively controls subgrade settlement, so as to improve the security in track and comfortableness.
Description
Technical field
The present invention relates to a kind of method of basement process in construction, more specifically a kind of control roadbed differential settlement
Dam filling construction.
Background technology
In the engineering of cycling track, basement process require it is higher, due to cycling track using the characteristics of determine to cycling track road
The settlement request of base section is high, and in driving procedure, speed is exceedingly fast for racing car, in corner in the presence of the anxious feelings for accelerating, bringing to a halt
Condition, this feature require that racing track will have higher bearing capacity and stability in itself, and GSZ traditional at present is entering walking along the street
Effect in terms of base processing is far from meeting requirement of the cycling track to match subgrade settlement control.
Traditional GSZ is that stretched formation has square or rectangle a polymer web material, and it is made through extruding
Punching on the polymer plate (raw material is mostly polypropylene or high density polyethylene (HDPE)) gone out, orientation is then implemented in a heated condition and is drawn
Stretch, difference of draw direction can be two kinds of simple tension and biaxial tension when being manufactured by it.Simple tension grid is only grown along sheet material
The stretching of degree direction is made；Two-way stretching grating is then to continue with again stretching the grid of simple tension in the direction vertical with its length
Be made, whether simple tension grid also or two-way stretching grating, roadbed filling stress only produced upwards in unidirectional or bidirectional square
Raw effect, it is impossible to keep effective carrying to roadbed for a long time.
The content of the invention
The present invention is to avoid the weak point present in above-mentioned prior art, there is provided a kind of advanced design, can effectively be dropped
The method of lower roadbed relative settlement, it disclosure satisfy that the construction method of track roadbed differential settlement.
The present invention adopts the following technical scheme that to solve technical problem：
(1) base treatment：The fertile soil and organoclay of foundation surface are cleared up, lays electrical conduits and drainage pipeline, is carried out
Earthing is buried, and the depth of burying is not less than 0.5m, and removes debris after being flattened；
(2) preparation is filled：Roadbed both sides set datum line, lay drill rod hanging wire control elevation；
(3) fill：From substrate, alternatively layered lays F2 grid layers and blotter from the bottom to top, until needed for practice of construction
Highly, wherein the process for being layered laying is, when blotter height often fills 0.2m, according to the compacted depth and Song Puhou of calculating
Degree, is rolled to the blotter filled, F2 grid layers is laid after the completion of rolling, wherein the F2 grids are set using rhombus
Meter, and vertical muscle is added in rhombus centre position, whole grid is evenly divided into the grid using triangle as minimum unit；
(4) pave：After the completion of step (3) is filled, graded broken stone is laid in blotter higher slice, is spread out on graded broken stone
Black top concrete layer.
Further, blotter described in step (3) uses smooth Sa rubble, and the smooth Sa rubble is continuous grading 0-
37.5mm rubbles form, and particle diameter is less than 50mm, and clay content is not more than 2%, and gill shape is not more than 20%.
Further, the paving mode of F2 grid layers is in step (3), and F2 grids are spread out along construction surface, will by design
Cutting, laying are asked, first layer is longitudinally laid along roadbed, and the second layer is laterally laid along road, successively alternately, and
The F2 grids of lap-joint are bundled using bundle rope.
Further, it is overlapping between the F2 grids to be less than 0.1m, it when laying F2 grids, should lie prostrate the patch that F2 grids smooth out
In rubble aspect, F2 grids is pasted with roadbed top surface and lie prostrate, the lap position between the upper and lower layer of F2 grids of lap-joint is mutually wrong
Open more than 1m.
Further, the bundle rope uses high density polyethylene (HDPE) rope, and wherein carbon black content cannot be less than 2%, and it is broken anti-
Pulling force should be greater than 200N.
Further, need to calculate optimum moisture content when being rolled in step (3) to blotter, roll order according to from outside to
It is interior, carry out from low to high, to ensure to roll when laterally rolling to overlap and take turns the 1/3 of pelmatogram, the paragraph for having rolled completion is entered in time
Row compactness detects, it is ensured that reaches design requirement, compactness deficiency paragraph, to carry out ftercompction.
Compared with the prior art, the present invention has the beneficial effect that：(1) adding vertical muscle in the F2 grids used makes entirely
Grid is evenly divided into the grid using triangle as minimum unit so that and F2 grids can act power in three directions,
By soil body particle by interlocking mesh, pellet is locked and constrained by pincers, makes the pellet layer on soft base be easier to be compacted, and improves filler pressure
Solidity, so as to effectively control the differential settlement of roadbed；(2) the smooth Sa rubble used is as roadbed bed course, and in smooth Sa rubble
The mode of middle interval laying F2 grid layers, the differential settlement for the roadbed that can further tighten control；(3) the F2 layings used
Mode makes the more perfect enhanced type composite material of F2 grid forming properties, is much better than tradition to the bearing capacity of roadbed filling
Simple tension grid also and two-way stretching grating；(4) F2 grids have anticorrosive, anti-aging, friction compared with conventional grates
The features such as coefficient is big, eyelet is uniform, easy for construction, service life is long；The effective interlocking for improving reinforcement loading end, occlusion are made
With, strengthen the bearing capacity of ground, effectively constrain the lateral displacement of the soil body, the firm performance of enhancing ground；Control differential settlement；
The disturbance and reduction to sensitive ground layer are reduced, improves foundation bearing capacity.
Embodiment
The dam filling construction of the control road surface relative settlement of offer is further described in detail with reference to specific embodiment.
(1) base treatment：The fertile soil and organoclay of foundation surface are cleared up, lays electrical conduits and drainpipe in field
Road, carry out earthing and bury, the depth of burying is not less than 0.5m, avoids damage to grid, and all kinds of debris are removed after being flattened and are dissipated
Fall material；
(2) preparation is filled：Roadbed both sides set datum line, lay drill rod hanging wire control elevation；
(3) fill：From substrate, alternatively layered lays F2 grid layers and blotter from the bottom to top, until needed for practice of construction
Highly, the soil body backfill of structure both sides is then carried out, wherein from smooth Sa rubble as blotter material, and use land leveller
Filled, described smooth Sa rubble is made up of continuous grading 0-37.5mm rubbles, and particle diameter is less than 50mm, it is desirable to which clay content is little
In 2%, gill shape is not more than 20%, and described smooth Sa rubble is transported using dump truck, forbids in transport process in the scope of operation
On bring to a halt, take a sudden turn, turn around and drive over the speed limit, prevent destroy grid.
The process of the wherein layering laying of blotter is when often filling smooth Sa rubble height 0.2m, according to the pressure of calculating
Real thickness and loose laying depth, are rolled to the blotter filled, and pave F2 grid layers after the completion of rolling, wherein the F2 lattice
Grid are designed using rhombus, and add vertical muscle in rhombus centre position, whole grid is evenly divided into using triangle as minimum
The grid of unit；Optimum moisture content need to be calculated when being rolled to blotter, order is rolled according to from outside to inside, enters from low to high
OK, to ensure to roll when laterally rolling and overlap the 1/3 of wheel pelmatogram, compactness detection is carried out in time to the paragraph for having rolled completion,
Ensure to reach design requirement, compactness deficiency paragraph, to carry out ftercompction.The layering laying of smooth Sa rubble can make full use of pressure road
The Compaction Effort of machine, it is ensured that every layer of construction quality, the maximum effect of construction in layer are to be able to ensure that each layer of compactness reaches
Design requirement, ensure that the indexs such as the structure roadbed of layering are easier to control during constructing operation, reduce compactness not
The appearance of Qualification, avoid because construction thickness is blocked up, compacting machinary Compaction Effort, which does not reach, causes metalling locally to sink
Drop problem.Construction operation is carried out according to the cross fall of roadbed when road roller rolls, in road roller when mainly considering to roll
Direction of advance and lateral attitude, exciting force when road roller vibrates wear can saturating metalling macadam-aggregate mix is had an impact, make
Metalling pellet produces passage, influences the compacted depth of pellet layer of paving, and occurs that thickness as outside is thin, the feelings of inner thickness super thick
Condition, influence the indexs such as compacted depth and horizontal slope.In addition, exciting force when road roller vibrates mainly concentrates the centre for acting on steel cylinder
Position, active force is relatively small at outer ledge, such action mode cause road roller have to ensure that in roller compaction process into
Row coincidence rolls, so as to ensure the overall consolidation effect of metalling.
The process of deployment of wherein F2 grid layers is to spread F2 grids out along construction surface, cut, lay by design requirement, the
One layer is longitudinally laid along roadbed, and the second layer is laterally laid along road, according to the laying number being actually needed, handed over successively
For progress, and the F2 grids of lap-joint are bundled using bundle rope, wherein the bundle rope uses high density polyethylene (HDPE) rope, wherein carbon black
Content cannot be less than 2%, and it is broken stretching resistance and should be greater than 200N；It is overlapping between the F2 grids to be less than 100mm, lay F2 grids
When, the patch that grid smoothes out should be made to lie prostrate in the aspect of banketing, F2 grids is pasted with roadbed top surface and lie prostrate, between the F2 grids of lap-joint
Lap position mutually staggers more than 1m.The paving mode of F2 grids " behind first longitudinal direction laterally " can make first layer and second layer making
Metalling formed and intersect form, make to form overall stress between two layers of metalling, it is effective by the stretching action of grid
Frictional resistance between increasing by two layers so that overall metalling, by that can improve stress effect after load, increases on horizontal and vertical
Big overall stress intensity, avoids part from settlement issues occur.
(4) pave：After the completion of step (3) is filled, graded broken stone is laid in blotter higher slice, is spread out on graded broken stone
Black top concrete layer.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Scope is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also includes art technology
Personnel according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (6)
- A kind of 1. dam filling construction for controlling roadbed differential settlement, it is characterised in that comprise the following steps,（1）Base treatment：The fertile soil and organoclay of foundation surface are cleared up, lays electrical conduits and drainage pipeline, carries out earthing Embedded, the depth of burying is not less than 0.5m, and removes debris after being flattened；（2）Fill preparation：Roadbed both sides set datum line, lay drill rod hanging wire control elevation；（3）Fill：From substrate, alternatively layered lays F2 grid layers and blotter from the bottom to top, until high needed for practice of construction Degree, wherein the process for being layered laying is, when blotter height often fills 0.2m, according to the compacted depth and Song Puhou of calculating Degree, is rolled to the blotter filled, F2 grid layers is laid after the completion of rolling, wherein the F2 grids are set using rhombus Meter, and vertical muscle is added in rhombus centre position, whole grid is evenly divided into the grid using triangle as minimum unit；（4）Pave：Step（3）After the completion of filling, graded broken stone is laid in blotter higher slice, pave drip on graded broken stone Blue or green concrete layer.
- 2. the dam filling construction of control roadbed differential settlement according to claim 1, it is characterised in that step（3）Described in Blotter uses smooth Sa rubble, and the rubble that the smooth Sa rubble is continuous grading 0-37.5mm forms, and particle diameter is less than 50mm, contained Mud amount is not more than 2%.
- 3. the dam filling construction of control roadbed differential settlement according to claim 1, it is characterised in that step（3）Middle F2 lattice The paving mode of gate layer is to spread F2 grids out along construction surface, cut, lay by design requirement, and first layer is longitudinal along roadbed Laying, the second layer are laterally laid along road, successively alternately, and are bundled the F2 grids of lap-joint using bundle rope.
- 4. the dam filling construction of control roadbed differential settlement according to claim 3, it is characterised in that between the F2 grids It is overlapping to be less than 0.1m, when laying F2 grids, the patch that F2 grids smooth out should be made to lie prostrate in rubble aspect, make F2 grids and roadbed top surface Patch volt, the lap position between the upper and lower layer of F2 grids of lap-joint mutually stagger more than 1m.
- 5. the dam filling construction of control roadbed differential settlement according to claim 3, it is characterised in that the bundle rope is using high Density polyethylene rope, wherein carbon black content cannot be less than 2%, and it is broken stretching resistance and should be greater than 200N.
- 6. the dam filling construction of control roadbed differential settlement according to claim 1, it is characterised in that step（3）In to broken Stone bed course need to calculate optimum moisture content when rolling, and roll order according to from outside to inside, carry out, rolled when laterally rolling from low to high It is the 1/3 of at least steel wheel width to overlap wheel pelmatogram.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710677663.0A CN107542016A (en) | 2017-08-09 | 2017-08-09 | A kind of dam filling construction for controlling roadbed differential settlement |
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| CN201710677663.0A CN107542016A (en) | 2017-08-09 | 2017-08-09 | A kind of dam filling construction for controlling roadbed differential settlement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717885A (en) * | 2022-06-07 | 2022-07-08 | 浙江大学 | Construction method for controlling railway ballast bed settlement based on geogrids |
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| US4797026A (en) * | 1984-05-09 | 1989-01-10 | The United States Of America As Represented By The Secretary Of The Army | Expandable sand-grid for stabilizing an undersurface |
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| CN101920566A (en) * | 2009-05-25 | 2010-12-22 | 特耐克斯股份公司 | The preparation method of stretching nets with multi-aspect |
| CN203128966U (en) * | 2013-05-16 | 2013-08-14 | 汇通路桥建设集团有限公司 | Cushion layer composite foundation of CFG (cement fly-ash gravel) pile for transition section |
| CN103741664A (en) * | 2013-12-20 | 2014-04-23 | 广西南宁百兰斯科技开发有限公司 | Load bearing type geogrid |
| CN104746399A (en) * | 2015-04-10 | 2015-07-01 | 成军 | Construction method for preventing vehicle bump at bridge head |
| CN105297572A (en) * | 2015-10-10 | 2016-02-03 | 青海省交通科学研究院 | Permafrost fill construction method |
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2017
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4797026A (en) * | 1984-05-09 | 1989-01-10 | The United States Of America As Represented By The Secretary Of The Army | Expandable sand-grid for stabilizing an undersurface |
| CN101050618A (en) * | 2007-04-30 | 2007-10-10 | 中铁八局集团有限公司 | Composite type cushion and its constructing method |
| CN101920566A (en) * | 2009-05-25 | 2010-12-22 | 特耐克斯股份公司 | The preparation method of stretching nets with multi-aspect |
| CN203128966U (en) * | 2013-05-16 | 2013-08-14 | 汇通路桥建设集团有限公司 | Cushion layer composite foundation of CFG (cement fly-ash gravel) pile for transition section |
| CN103741664A (en) * | 2013-12-20 | 2014-04-23 | 广西南宁百兰斯科技开发有限公司 | Load bearing type geogrid |
| CN104746399A (en) * | 2015-04-10 | 2015-07-01 | 成军 | Construction method for preventing vehicle bump at bridge head |
| CN105297572A (en) * | 2015-10-10 | 2016-02-03 | 青海省交通科学研究院 | Permafrost fill construction method |
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| CN114717885A (en) * | 2022-06-07 | 2022-07-08 | 浙江大学 | Construction method for controlling railway ballast bed settlement based on geogrids |
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Application publication date: 20180105 |
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