CN1460748A - Roadbed structrue for highway and railway and its construction method - Google Patents
Roadbed structrue for highway and railway and its construction method Download PDFInfo
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- CN1460748A CN1460748A CN 03148560 CN03148560A CN1460748A CN 1460748 A CN1460748 A CN 1460748A CN 03148560 CN03148560 CN 03148560 CN 03148560 A CN03148560 A CN 03148560A CN 1460748 A CN1460748 A CN 1460748A
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Abstract
The roadbed for highroad and railroad only is formed from compacted soil layer and reinforced concrete road surface layer fixedly connected on it, in which the compacted soil layer is the layer-to-layer compacted primary soil layer and the reinforced concrete road surface layer. In the concrete the grilled net reinforcing bars are set, so that said roadbed has good water-proofing property.
Description
Technical field
The invention belongs to roadbed structure and construction method thereof in the highway construction.
Background technology
China's existing highway particularly the roadbed of speedway to build be to adopt the overhead method of deep-cutting basically, return pad behind the excavation again, the living old soil in source that is about to existing ground digs out, successively be encased inside plain soil, dirt, cobble, slabstone more from bottom to top, fix the sand, inorganic material etc., the superiors are bituminous sheaths or plain concrete layer, constitute the roadbed of sandwich construction, on the road surface, also be provided with the shrinkage joint.The roadbed that this mode is built is not only invested height, long in time limit, and application life is short, its deadly defect is that the roadbed water resistance is poor, because old soil is given birth in the source to be dug out, primary landforms and the old soil of natural subsidence typing in 1,100 have been destroyed, promptly destroyed the earth formation of its former instinct impermeabilisation, and the new sand that returns pad, stone, ash itself can not be solidified as one again, and the various material property differences of back-filling in layers, the coefficient of dilatation difference is difficult to resist the error dislocation of expanding with heat and contract with cold and separates damagedly sink, and therefore four limits all can not water leakage up and down for the roadbed of this structure, and four limits at the shrinkage joint on road surface also are infiltrations, melt to ooze the winter badly broken that rises.So the speedway that puts into operation needs overhaul, rebuilding less than the just all breakages of 7 years road surfaces, and this can only regain 1/3 investment in the period of seven.Is the problem that also there is waterproof in the main railway bed that constitutes with the rubble, summer thaw collapse, winter, frost heave had a strong impact on railway speed increase, when especially flood arrives, washed away roadbed, the situation that thrusts driving takes place repeatedly.
Summary of the invention
The present invention will solve the problem that exists in the above-mentioned prior art, and a kind of small investment is provided, and the duration is short, and water resistance is good, general novel roadbed of the road and rail of long service life and job practices thereof.
Technical scheme of the present invention is as follows:
Novel subgrade structure is still hierarchy, native compacted lift and affixed in the above 2 layers of structure of reinforced concrete pavement layer but it only is always or usually as specified; Old soil layer is given birth in the source of the original ground of the maintenance face of land stress that plain native compacted lift is compacting layer by layer, the structure of reinforced concrete pavement layer is, the elongated reinforcing bar of forming grid is set in the concrete of design thickness, the shrinkage joint is not established on the road surface, constitutes the novel roadbed of the logical muscle of Tong Jitong beam, integral waterproofing, collective's load thus.Wherein logical base is to keep original ground not excavate, do not destroy himself stress, keeps the stable of the face of land; Logical beam is the whole overall perfusions of all bridges on the road, does not stay seam, not the shrinkage joint; Logical muscle is the used all welding of bar splice part of steel concrete, keeps its globality.
The pre-buried rail positioning bolt of desired location then constitutes the novel railway roadbed in the layer of the reinforced concrete pavement of described novel roadbed.
The job practices of novel roadbed still adopts the conventional construction machinery of highway construction, and its construction sequence is:
(1) determines center, institute causeway road absolute altitude;
(2) deduct road surface reinforced concrete soil thickness, determine the absolute altitude timber line of ground works;
(3) adopt highway engineering construction machinery that old soil layer is given birth in the source in base, road construction place and push away low bed course lamination in fact, finish ground works by the design standard height;
(4) carry out reinforced concrete pavement layer construction:
A, make the template leave eyelet, and according to the absolute altitude of rigid pavement with falsework in the roadbed both sides;
The reinforcing bar grid net is laid in establishment on b, the setting height in template framework;
C, fluid concrete reach design standard;
D, reinforced concrete pavement maintenance.
In step (1), during the new in this way old road of continued access, road, be that reference point is determined Xin Lu center absolute altitude with old road grade elevation.
Major advantage of the present invention is: 1, because the plain soil layer in the road structure of the present invention is to give birth to old soil layer without the source of excavation, the old soil structure of typing that has kept primary landforms natural subsidence, thereby just kept its anti-permeability performance originally, reinforced concrete pavement layer above the plain in addition native compacted lift is the overall structure of the logical muscle of Tong Jitong beam, the road surface vertical, horizontal is not stayed the shrinkage joint, and the water resistance of therefore new roadbed improves greatly; 2, because plain native compacted lift is compacting layer by layer, its vertical load reaches more than 8 tons, and the bar splice position in the layer of reinforced concrete pavement is to weld uninterruptedly, the density of reinforcing bar can reach 6 every square metre, calculate by every stretching resistance 16T, add the concrete of cast C20～C30, collective's load on this road can reach 100T/m
2More than, surpass national standard; 3, as seen, the present invention is the road surface that is solidified as a whole, and is fixed on just as the deck of boat on the plain soil layer of compacting waterproof from new subgrade structure, therefore have indeformable, as to be difficult for the infiltration of broken crack advantage, firm wear-resisting, significantly reduced maintenance, prolonged overhaul life, can reach in 20 years and not keep in repair; 4, roadbed of the present invention is not driven piles in construction, does not deep-cut, and is not overhead, not soil removal and replacement, without lime, cobble, sand, do not establish the shrinkage joint, without anti-slip tank and dead guardrail, new roadbed only is 2 layers of structure, it is superior performance not only, and shortens the construction time limit greatly, reduces construction investment, be about 1/2 of conventional art, remarkable in economical benefits; 5, because supercrust is an overall structure, thereby when the chance extraodinary flood washed away bottom, one deck still can pass through just as bridge above it, reduced the loss of disaster.
Description of drawings
Fig. 1 is used for the novel subgrade cross section sectional view of highway for the present invention
Fig. 2 is used for the novel subgrade cross section sectional view of railway for the present invention
Fig. 3 is a reinforcing bar grid web frame schematic diagram
Among the figure: the plain native compacted lift of 1-, 2-reinforcing bar grid net, 3-reinforced concrete pavement layer, 4-rail positioning bolt
The specific embodiment
Its thickness of the native compacted lift of described element is 300～500mm, and its absolute altitude, the gradient, Pingdu and vertical load all reach designing requirement; The vertical load of plain native compacted lift is 8T/m
2More than, a cubic metre of earth longitudinal gradient is below 1/100, horizontal wall inscription is below 1/100.
Described reinforced concrete pavement its thickness of layer is 250～300mm, and its absolute altitude, the gradient, Pingdu and load all reach designing requirement; Road surface collective load reaches 100T/m
2
The described elongated reinforcing bar of forming grid in the layer of concrete that is arranged on, its length is vertically, laterally length, the width with the road surface is suitable respectively;
Described grid can be 300～600mm by every lattice
2Square or rectangular form, this reinforcing bar grid net is laid in the layer of concrete apart from plain native compacted lift end face 1/3 height, the position of 2/3 height apart from the road surface.
With every lattice is that the grid that the square of 400 * 400mm is formed is an example, it is the screw-thread steel of 16mm that reinforcing bar adopts diameter, every stretching resistance is 16T, every square metre is 6, then its stretching resistance of every square metre is 16 * 6=96 (T), other adds the cast label is the concrete of C30, the reinforced concrete pavement layer of Gou Chenging thus, and its load can reach 100T/m
2
When the roadbed that is made of native compacted lift of above-mentioned element and affixed reinforced concrete pavement layer on it was used for railway, the quantity that is embedded in the rail positioning bolt in the layer of reinforced concrete pavement was 4 of every linear meter(lin.m.)s.When novel roadbed was used for railway, its cubic metre of earth longitudinal gradient was below 1/100, and horizontal wall inscription is below 1/100.Adopt the railway cancellation sleeper of novel roadbed, rail is fixed by above-mentioned positioning bolt, changes the elongated Rubber washer of pad under the rail, and rail head changes mitered into.
In the job practices of the novel roadbed of the present invention, adopt described machinery of technical scheme and step to carry out.Wherein:
When finishing the concrete practice of ground works described in the step (3): a, with bulldozer old soil layer height is given birth in the source and push away low pad, basic layer by layer compacting flattens; B, wipe off again with drag planer; C, smash the road roller compacting with heavy shake again, and keep cubic metre of earth humidity moderate; D, repeatedly repeat above-mentioned steps a～c, this old soil layer by design elevation, the gradient, Pingdu compacting layer by layer, is reached or greater than 8T/m until the vertical load of this element soil compacted lift
2During as geology such as soft Ji Lu, drift sand formation, mud, swamp lands, need only dose soil or architecture sediment and return the pad compacting, push away the low technological operation of filling up, flattening compacting layer by layer, make roadbed earthwork vertical load reach 8T/m according to above-mentioned height
2More than, and do not deep-cut the processing that soil removal and replacement is driven piles.
The described template of a is a Steel-wood forming board in step (4), it highly is that the thickness of 260～300mm and reinforced concrete pavement layer adapts, what reserve on template wall is to wear the eyelet of taking reinforcing bar, each lattice distance of eyelet spacing and grid is corresponding, eyelet terrain clearance and grid setting height(from bottom) adapt, and it is horizontal flat vertically firmly stable that template should keep.When the reinforcing bar grid net is that the square of 400 * 400mm is formed by every lattice, reinforcing bar adopts
Screw-thread steel the time, reserve eyelet on the template wall and be
Eyelet is 58mm from the native compacted lift apical side height of element, and pitch-row is 400mm.
To adopt diameter be the screw-thread steel establishment of 14～16mm to the described reinforcing bar grid net of b in the step (4), the method for firm welding again after the connection of reinforcing bar and the joint area binding;
The described concrete of c adopts the C20～C30 label concrete of highway designing requirement in the step (4), and its pouring procedure is: 1. will stir the concrete of delivering to the job site and pour into along a side of roadbed; 2. by paving the way the concussion machine outside roadbed, pave, settle at one go while shaking.Naturally little hair side need not smeared, one-time-reach-place, maintenance of surface 20 days.
Claims (8)
1, the general novel subgrade structure of a kind of road and rail comprises the hierarchy that contains the soil layer of being always or usually as specified, and it is characterized in that: this roadbed only be always or usually as specified native compacted lift and affixed in the above 2 layers of structure of reinforced concrete pavement layer; Old soil layer is given birth in the source of the original ground of the maintenance face of land stress that plain native compacted lift is compacting layer by layer, the structure of reinforced concrete pavement layer is, the elongated reinforcing bar of forming grid is set in the concrete of design thickness, the shrinkage joint is not established on the road surface, constitutes the novel roadbed of the logical muscle of Tong Jitong beam, integral waterproofing, collective's load thus.
2, the general novel subgrade structure of road and rail according to claim 1 is characterized in that: its thickness of the native compacted lift of described element is 300～500mm, and its absolute altitude, the gradient, Pingdu and vertical load all reach designing requirement; Described reinforced concrete pavement its thickness of layer is 250～300mm, and its absolute altitude, the gradient, Pingdu and load all reach designing requirement; The described elongated reinforcing bar of forming grid in the layer of concrete that is arranged on, its length is vertically, laterally length, the width with the road surface is suitable respectively; Described grid can be 300～600mm by every lattice
2Square or rectangular form, this reinforcing bar grid net is laid in the layer of concrete apart from plain native compacted lift end face 1/3 height, the position of 2/3 height apart from the road surface.
3, the general novel subgrade structure of road and rail according to claim 1, it is characterized in that: the pre-buried rail positioning bolt of desired location in the layer of the reinforced concrete pavement of described novel roadbed, then constitute the novel railway roadbed, the quantity of positioning bolt is pre-buried 4 of every linear meter(lin.m.).
4, the job practices of the general novel roadbed of a kind of road and rail relates to the construction machinery of highway construction routine, it is characterized in that the construction sequence of roadbed of the present invention is as follows:
(1) determines center, institute causeway road absolute altitude;
(2) deduct road surface reinforced concrete soil thickness, determine the absolute altitude timber line of ground works;
(3) adopt highway engineering construction machinery that old soil layer is given birth in the source in base, road construction place and push away low bed course lamination in fact, finish ground works by the design standard height;
(4) carry out reinforced concrete pavement layer construction:
A, make the template leave eyelet, and according to the absolute altitude of rigid pavement with falsework in the roadbed both sides;
The reinforcing bar grid net is laid in establishment on b, the setting height in template framework;
C, fluid concrete reach design standard;
D, reinforced concrete pavement maintenance.
5, the job practices of the general novel roadbed of road and rail according to claim 4 is characterized in that: during the new in this way old road of continued access, road, be that reference point is determined Xin Lu center absolute altitude with old road grade elevation in step (1).
6, the job practices of the general novel roadbed of road and rail according to claim 4 is characterized in that: when finishing the concrete practice of ground works described in the step (3): a, with bulldozer old soil layer height is given birth in the source and push away low pad, basic layer by layer compacting flattens; B, wipe off again with drag planer; C, smash the road roller compacting with heavy shake again, and keep cubic metre of earth humidity moderate; D, repeatedly repeat above-mentioned steps a～c, this old soil layer by design elevation, the gradient, Pingdu compacting layer by layer, is reached or greater than 8T/m until the vertical load of this element soil compacted lift
2
7, the job practices of the general novel roadbed of road and rail according to claim 4, it is characterized in that: the described template of a is a Steel-wood forming board in the step (4), it highly is that the thickness of 260～300mm and reinforced concrete pavement layer adapts, what reserve on template wall is to wear the eyelet of taking reinforcing bar, each lattice distance of eyelet spacing and grid is corresponding, eyelet terrain clearance and grid setting height(from bottom) adapt, and it is horizontal flat vertically firmly stable that template should keep.
8, the job practices of the general novel roadbed of road and rail according to claim 4, it is characterized in that: to adopt diameter be the screw-thread steel establishment of 14～16mm to the described reinforcing bar grid net of b in the step (4), the method for firm welding again after the connection of reinforcing bar and the joint area binding; The described concrete of c adopts the C20～C30 label concrete of highway designing requirement in the step (4), and its pouring procedure is: 1. will stir the concrete of delivering to the job site and pour into along a side of roadbed; 2. by the concussion machine roadbed outside again of paving the way, pave, settle at one go while shaking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03148560 CN1460748A (en) | 2003-07-03 | 2003-07-03 | Roadbed structrue for highway and railway and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03148560 CN1460748A (en) | 2003-07-03 | 2003-07-03 | Roadbed structrue for highway and railway and its construction method |
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| Publication Number | Publication Date |
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| CN1460748A true CN1460748A (en) | 2003-12-10 |
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| CN 03148560 Pending CN1460748A (en) | 2003-07-03 | 2003-07-03 | Roadbed structrue for highway and railway and its construction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357520C (en) * | 2005-08-12 | 2007-12-26 | 中国科学院寒区旱区环境与工程研究所 | U-type cold energy gathering roadbed utilizing natural cold erergy |
| CN100464020C (en) * | 2007-04-27 | 2009-02-25 | 东南大学 | Continuously reinforced concrete road surface end portion treating method |
| CN105839485A (en) * | 2016-03-18 | 2016-08-10 | 江苏建筑职业技术学院 | Soil taking method in highway construction process |
| CN110055825A (en) * | 2019-04-28 | 2019-07-26 | 中铁二院工程集团有限责任公司 | A kind of enhanced ballast bed structure of embankment cogwheel railway and construction method |
| CN112144359A (en) * | 2020-09-25 | 2020-12-29 | 中建六局水利水电建设集团有限公司 | Construction method of road foundation |
| CN112962390A (en) * | 2021-03-04 | 2021-06-15 | 青岛西海岸市政工程有限公司 | Waterproof isolation protection structure for coastal city municipal roads and construction method |
-
2003
- 2003-07-03 CN CN 03148560 patent/CN1460748A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357520C (en) * | 2005-08-12 | 2007-12-26 | 中国科学院寒区旱区环境与工程研究所 | U-type cold energy gathering roadbed utilizing natural cold erergy |
| CN100464020C (en) * | 2007-04-27 | 2009-02-25 | 东南大学 | Continuously reinforced concrete road surface end portion treating method |
| CN105839485A (en) * | 2016-03-18 | 2016-08-10 | 江苏建筑职业技术学院 | Soil taking method in highway construction process |
| CN110055825A (en) * | 2019-04-28 | 2019-07-26 | 中铁二院工程集团有限责任公司 | A kind of enhanced ballast bed structure of embankment cogwheel railway and construction method |
| CN112144359A (en) * | 2020-09-25 | 2020-12-29 | 中建六局水利水电建设集团有限公司 | Construction method of road foundation |
| CN112962390A (en) * | 2021-03-04 | 2021-06-15 | 青岛西海岸市政工程有限公司 | Waterproof isolation protection structure for coastal city municipal roads and construction method |
| CN112962390B (en) * | 2021-03-04 | 2022-08-30 | 青岛西海岸市政工程有限公司 | Waterproof isolation protection structure for coastal city municipal roads and construction method |
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