CN103541311B - A kind of construction method of high roadbed corrugated steel culvert - Google Patents
A kind of construction method of high roadbed corrugated steel culvert Download PDFInfo
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- CN103541311B CN103541311B CN201310432333.7A CN201310432333A CN103541311B CN 103541311 B CN103541311 B CN 103541311B CN 201310432333 A CN201310432333 A CN 201310432333A CN 103541311 B CN103541311 B CN 103541311B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 50
- 239000010959 steel Substances 0.000 title claims abstract description 50
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000005056 compaction Methods 0.000 claims abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 11
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000002203 pretreatment Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 230000010485 coping Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Abstract
The invention discloses a kind of construction method of high roadbed corrugated steel culvert, comprise assembled, predeformation and the backfill of culvert.Advantage of the present invention makes corrugated steel culvert pressure in backfilling process reduce for this construction method, and improve the bearing capacity of culvert, identical corrugated steel culvert may be used in the higher engineering of earthing, and not easily cracking damage; Make full use of the flexible characteristic of corrugated steel tube and pre-treatment is done to it, the culvert after backfilling is made to keep original form, avoid culvert to be in the past squeezed into flat tube by pipe, even to be pressed the unfavorable situation of collapsing, solve the quality problems that both sides backfill generally can not arrive standard compaction degree simultaneously.
Description
Technical field
The present invention relates to a kind of construction method of culvert, particularly relate to a kind of construction method of heavy caliber high roadbed corrugated steel culvert.
Background technology
Infrastructure construction is in recent years greatly developed, especially speedway, the Mountain Debelopment of multidirectional with a varied topography, ravines and guillies criss-cross, and there is a large amount of high embankment roadbeds and construction of tunnel in speedway, therefore, one of high-fill roadbed common type becoming High Grade Highway in Mountain Area, thus the culvert construction under high-filled embankment is emerged in multitude.Meanwhile, because corrugated steel self good characteristic is many, so adopt the assembled culvert of corrugated steel to widely apply in highway construction, so build corrugated steel culvert more and more in new highway.The corrugated steel tube in high roadbed location is larger because contain top earthing, and designer is difficult to the geological condition comprehensively understanding culvert substrate when culvert design, if constructor does not have in strict accordance with reasonable construction process operation in work progress, if such as do not had in strict accordance with technological process and construction requirement operation in backfilling process, both sides fill compaction degree does not reach 96%, the distortion exceeding allowed band is just produced during corrugated steel tube can be caused even to backfill after backfill, there is the potential safety hazard of local yielding, if culvert damages in construction or in using, then can cause the economic loss that can not gain.In addition, high roadbed culvert need bear soil pressure, if the excessive deflection exceeding it and can bear of soil pressure, also the cracking of culvert can be caused even to destroy, so common coping style thickeies the steel plate wall of corrugated steel culvert, so not only increase financial cost, and improve difficulty of construction, construction works amount doubles equally, and construction period is longer.
After the soil filled on the top of culvert of high roadbed corrugated steel culvert reach a certain height, arching is produced, because the roadbed above high roadbed is often the bulk solid being different from rock, so above-mentioned arching is unstable above culvert, and along with the increase of the depth of fill, containing pressure on top surface be that non-linear rule changes.Rigid culvert as shown in Fig. 1 (a), in backfilling process, because rigid culvert is compressible hardly, and the compressibilty of banketing of culvert both sides is comparatively large, under the effect of top filled load, the settling amount of outer earth pillar is greater than the settling amount of interior earth pillar, the internal earth pillar of outer earth pillar produces downward friction force, bottom culvert, bearing capacity of foundation soil is compared with around subgrade rating is large, and culvert settling amount is less than roadbed around, causes culvert pressure to be greater than top earth pillar pressure, hole (interior earth pillar pressure).And rigid culvert relies on the intensity of self to bear top earth pillar pressure completely, when the depth of fill increases up, need to change culvert cross-sectional area, improve the measures such as the strength of materials to meet Structural strength calls, cause culvert cost to increase, construction works amount increases and adds difficulty of construction and duration.
Summary of the invention
Goal of the invention: the object of this invention is to provide a kind of can improve corrugated steel culvert bearing capacity, prevent culvert pressure to collapse the construction method damaged.
Technical scheme: the processing mode of a kind of high roadbed corrugated steel culvert of the present invention, comprises following sequential steps:
(1) with the assembled culvert of corrugated steel;
(2) culvert predeformation: the vertical diameter in culvert circular section props up culvert to support, establishes tightening device at the horizontal radial in this cross section simultaneously, until reach predeformation amount, makes culvert become vertical oval culvert;
(3) wait being backfilled to, earthing is pushed up in hole, hole body removes above-mentioned support and tightening device after stablizing.
In step (2), culvert of jack-uping, and prop up with support, tighten up thereupon, then repeat to implement, control culvert and must not be exceeded its amount of plastic deformation by the deflection of jack-up at every turn.Also process ground between step (1) and step (2), make the large 30 ~ 50KPa of bearing capacity of foundation soil bottom the basic foundation bearing capacity ratio culvert of both sides, culvert projected area, the process width of every side is greater than 3 meters and is greater than 2/3 culvert span simultaneously.In step (3), earthing in the wide regions such as top, hole and culvert horizontal diameter, below height to earth up H only piles up, and not compacting, starts compacting after reaching height H, until degree of compaction reaches more than 96%.In step (2), the predeformation amount of culvert is its vertical enlarged diameter 3 ~ 5%.Described tightening device is the horizontal lacing wire be made up of reinforcing bar, lockset screw-button and bolt.Described reinforcing bar is horizontally fixed on corrugated steel tube by bolt, and lockset screw-button is buckled in the middle part of reinforcing bar.Describedly be supported for wooden support or steel supports.One support is established every two joint corrugated steels.In step (3), after being backfilled to top, hole earthing 0.5-1 rice, remove above-mentioned support and tightening device.
Inventive principle: corrugated steel tube belongs to flexible material, flexible culvert as shown in Fig. 1 (b), after taking above-mentioned measure, the sedimentation that banket in culvert both sides in top of conduit subgrade settlement process is less than the sedimentation of banketing above culvert, two slide planes are formed in both sides, culvert top, soil at both sides (outer earth pillar) produces frictional force upwards relative to culvert top earth pillar (interior earth pillar) on slide plane, and thus culvert pressure is less than top of conduit earth pillar pressure.On this basis, it is made to become vertical elliptical tube from pipe to culvert as predeformation, as the reserved decrement under pressure effect of banketing, like this in backfilling process, top, hole earth pillar sinks, under the pressure effect of this earth pillar, culvert pushes back pipe by elliptical tube is squeezed, and in the process, banket and obtain sufficient compacting in culvert both sides, degree of compaction reaches more than 96%, solves the quality problems that in engineering construction, ubiquitous backfill pressure is unreal.In addition, the corrugated steel culvert of same waveform parameter, steel plate thickness is after taking reducing pressure, above culvert, earth pillar pressure is obviously reduced, namely mutually isostructural corrugated steel culvert can be used in the higher engineering of pipe top earthing after off-loading process, but the cost of engineering does not increase, and just changes construction technology and flow process.
Beneficial effect: the present invention compared with prior art, its remarkable advantage for this construction method make corrugated steel culvert in backfilling process pressure reduce, namely improve the bearing capacity of culvert, identical corrugated steel culvert may be used in the higher engineering of earthing, and not easily cracking damage; Make full use of the flexible characteristic of corrugated steel tube and pre-treatment is done to it, the culvert after backfilling is made to keep original form, avoid culvert to be in the past squeezed into flat tube by pipe, even to be pressed the unfavorable situation of collapsing, solve the quality problems that both sides backfill generally can not arrive standard compaction degree simultaneously.The bellows-shaped of steel plate adds its second moment of area, improves the compressive strength of steel plate; Corrugated cardboard sheet can standardized production, is beneficial to the production and processing of production line formula and the preservative treatment of production line formula, greatly reduces manufacturing cost; Can multi-disc, more piece assembled, can all be prefabricated in the factory, also corrugated cardboard sheet can be transported to on-the-spot after prefabricated, easy construction is simple, short construction period; The stackable transport of corrugated cardboard sheet, takes up room little, substantially increases capacity and freight volume, reduces cost of transportation.
Accompanying drawing explanation
Fig. 1 (a), 1 (b) are the earth pillar sedimentation schematic diagram of two kinds of culverts;
Fig. 2 is the predeformation schematic diagram of corrugated steel culvert of the present invention;
Fig. 3 is the area schematic of basement process;
Fig. 4 and Fig. 5 is predeformation implementation process schematic diagram of the present invention;
Fig. 6 is backfilling process schematic diagram of the present invention.
Detailed description of the invention:
Fig. 1 (a) is rigid culvert earth pillar sedimentation schematic diagram, Fig. 1 (b) is flexible culvert earth pillar sedimentation schematic diagram, wherein τ represents the frictional force that the internal earth pillar of outer earth pillar produces, in Fig. 1 (a), τ direction is downward, and in Fig. 1 (b), τ direction upwards, and h is the depth of fill, 1 is culvert, 2 is ground, is roadbed below ground, and 3 is plane of banketing.
First, select Q345 or higher level hot rolled steel plate, steel plate will carry out galvanized anticorrosive process in its surface after the large waveform of processing, completes corrugated steel culvert at the construction field (site) according to corrugated steel tube construction works is assembled.Then, based process is carried out to culvert 1, make the large 30 ~ 50KPa of bearing capacity of foundation soil bottom the basic foundation bearing capacity ratio culvert of both sides, culvert projected area, and the process width of every side is greater than 3 meters and is greater than 2/3 culvert span (as shown in Figure 3), the processing mode in culvert base is identical with roadbed foundation treatment mode, but process intensity is weaker than roadbed basement process.Then in culvert 1, arrange one vertical support 4 every two joint corrugated steels, or the spacing of adjacent supports 4 is about 2.0m, supporting 4 is wooden support or steel-made support.As shown in Figure 4,5, first culvert 1 predeformation position and near the top of position (all in position, circular section) and bottom indulge to chock 10, and lay the sandy soil exceeding ripple top 50mm at support base place, prevent predeformation from damaging at the bottom of top, hole or hole; Secondly with top, jack 9 jack-up hole, in order to prevent being fallen after rise again by the culvert 1 of jack-up, so prop up with support 4, and pad timber wedge 8 between the longitudinal chock 10 pushed up in this support, top and hole, more be conducive to support 4 upwardly (to note: Fig. 4,5 represents first use jack 9 and support 4 jack-up culverts, in this process, bottom jack 9 and between longitudinal chock 10, also pad timber wedge 8, be beneficial to jack 9 upwardly culvert 1; Then support 4 is established in addition nearby, as shown in Figure 2).
Meanwhile, a tightening device is had at the horizontal radial in this cross section, the reinforcing bar 6 arranged about having two horizontal directions in this tightening device, one end of reinforcing bar 6 is fixed on culvert sidewall by two bolts 5 respectively, lockset screw-button 7 to fasten and inwardly (direction, the center of circle) tightens up reinforcing bar 6 from reinforcing bar 6 other end, wherein, reinforcing bar 6 is the reinforcement of concrete indented bars, bolt 5 high-strength corrosion-resisting galvanizing bolt.Then repeat jack-up culvert 1 and tighten up reinforcing bar 6, until the vertical enlarged diameter 3-5% of culvert 1, circular culvert becomes vertical ellipse; Because the length supported is greater than the diameter of culvert 1 circular section, so in order to supports slowly is propped up culvert, will repeatedly use jack 8, when noting with jack 8 jack-up culvert 1, each deflection of culvert 1 must not too greatly, in order to avoid cause plastic strain.Finally banket, after being backfilled to top, hole earthing 0.5-1 rice, remove support and tightening device.In backfilling process, a-quadrant is the area that bankets, within the scope of top, hole and the wide soil layer of culvert during earthing, only piled up by the loose whereabouts of backfill below height H, not compacting, after reaching H height, carry out compacting to B region above loose soil bed, degree of compaction reaches more than 96%, and under different backfilling material and different embankment overall height, loose depos-its layer thickness is different, refers to following table 1 and Fig. 6.Owing to making predeformation to culvert before, reserved compress variation to culvert, so in backfilling process, vertical oval culvert is slowly pushed back original state by earthing, and can not be flattened pressure and collapse; Secondly, B region (in H height) as cushion coat, (namely more than H height) carries out compacting and can effectively avoid the earthing backfilled to directly act on hole pushing up, extrude and the damage causing hole to push up above it; In this process, the compacting of culvert both sides is abundant, and degree of compaction reaches more than 96%, also can limit the tubular culvert pushed back and be out of shape further, ensures
Table 1
Claims (10)
1. a construction method for high roadbed corrugated steel culvert, is characterized in that comprising following sequential steps:
(1) with the assembled culvert of corrugated steel;
(2) culvert predeformation: the vertical diameter in culvert circular section props up culvert to support, establishes tightening device at the horizontal radial in this cross section simultaneously, until reach predeformation amount, makes culvert become vertical oval culvert;
(3) wait being backfilled to, earthing is pushed up in hole, hole body removes above-mentioned support and tightening device after stablizing.
2. the construction method of high roadbed corrugated steel culvert according to claim 1, it is characterized in that: in step (2), to jack-up culvert, and prop up with support, tighten up thereupon, then repeat to implement, control culvert and must not be exceeded its amount of plastic deformation by the deflection of jack-up at every turn.
3. the construction method of high roadbed corrugated steel culvert according to claim 1, it is characterized in that: also ground is processed between step (1) and step (2), make the large 30 ~ 50KPa of bearing capacity of foundation soil bottom the basic foundation bearing capacity ratio culvert of both sides, culvert projected area, the process width of every side is greater than 3 meters and is greater than 2/3 culvert span simultaneously.
4. the construction method of high roadbed corrugated steel culvert according to claim 1, it is characterized in that: in step (3), earthing in the wide regions such as top, hole and culvert horizontal diameter, below height to earth up H only piles up, not compacting, compacting is started, until degree of compaction reaches more than 96% after reaching height H.
5. the construction method of high roadbed corrugated steel culvert according to claim 1, is characterized in that: in step (2), and the predeformation amount of culvert is the elongation of its vertical diameter 3 ~ 5%.
6. the construction method of high roadbed corrugated steel culvert according to claim 1 and 2, is characterized in that: in step (2), and described tightening device is the horizontal lacing wire be made up of reinforcing bar, lockset screw-button and bolt.
7. the construction method of high roadbed corrugated steel culvert according to claim 6, it is characterized in that: described reinforcing bar is horizontally fixed on corrugated steel tube by bolt, lockset screw-button is buckled in the middle part of reinforcing bar.
8. the construction method of high roadbed corrugated steel culvert according to claim 1 and 2, is characterized in that: in step (2), described in be supported for wooden support or steel supports.
9. the construction method of high roadbed corrugated steel culvert according to claim 1 and 2, is characterized in that: in step (2), establishes one support every two joint corrugated steels.
10. the construction method of high roadbed corrugated steel culvert according to claim 1 and 2, is characterized in that: in step (3), after being backfilled to top, hole earthing 0.5-1m, remove above-mentioned support and tightening device.
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| CN201310432333.7A CN103541311B (en) | 2013-09-18 | 2013-09-18 | A kind of construction method of high roadbed corrugated steel culvert |
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| CN201310432333.7A CN103541311B (en) | 2013-09-18 | 2013-09-18 | A kind of construction method of high roadbed corrugated steel culvert |
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| CN103541311B true CN103541311B (en) | 2015-10-28 |
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| CN105951616B (en) * | 2016-05-17 | 2018-05-04 | 重庆建工第十一建筑工程有限责任公司 | Major diameter assembling type steel corrugated culvert cavity construction method |
| CN116291603B (en) * | 2023-03-10 | 2023-11-28 | 云南省交通规划设计研究院有限公司 | Retractable corrugated plate structure suitable for soft rock tunnel and design method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB702888A (en) * | 1952-08-13 | 1954-01-27 | Armco Int Corp | Flexible, corrugated metal pipe |
| CN2670429Y (en) * | 2003-09-23 | 2005-01-12 | 上海市政工程设计研究院 | Culvert pipes |
| RU2280124C1 (en) * | 2004-12-01 | 2006-07-20 | Открытое акционерное общество "Научно-исследовательский институт транспортного строительства" (ОАО ЦНИИС) | Culvert structure in reinforced ground case |
| CN202787102U (en) * | 2012-04-10 | 2013-03-13 | 张志勇 | Corrugated culvert pipe with strong bearing capacity |
| CN202969393U (en) * | 2012-12-12 | 2013-06-05 | 湖北工业大学 | Ribbing load reduction structure of road high hill culvert |
-
2013
- 2013-09-18 CN CN201310432333.7A patent/CN103541311B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB702888A (en) * | 1952-08-13 | 1954-01-27 | Armco Int Corp | Flexible, corrugated metal pipe |
| CN2670429Y (en) * | 2003-09-23 | 2005-01-12 | 上海市政工程设计研究院 | Culvert pipes |
| RU2280124C1 (en) * | 2004-12-01 | 2006-07-20 | Открытое акционерное общество "Научно-исследовательский институт транспортного строительства" (ОАО ЦНИИС) | Culvert structure in reinforced ground case |
| CN202787102U (en) * | 2012-04-10 | 2013-03-13 | 张志勇 | Corrugated culvert pipe with strong bearing capacity |
| CN202969393U (en) * | 2012-12-12 | 2013-06-05 | 湖北工业大学 | Ribbing load reduction structure of road high hill culvert |
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| CN103541311A (en) | 2014-01-29 |
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Address after: 211215 Zhetang Town Industrial Park, Lishui District, Nanjing City, Jiangsu Province Patentee after: NANJING LIANZHONG ENGINEERING TECHNOLOGY Co.,Ltd. Address before: 211215 No. 331 Zhening East Road, Zhetang Industrial Concentration Zone, Lishui Economic Development Zone, Nanjing City, Jiangsu Province Patentee before: NANJING LIANZHONG CONSTRUCTION ENGINEERING TECHNOLOGY Co.,Ltd. |
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Denomination of invention: A Construction Method of Corrugated Steel Pipe Culvert with High Fill Effective date of registration: 20221026 Granted publication date: 20151028 Pledgee: Jiangsu SINOSURE technology microfinance Co.,Ltd. Pledgor: NANJING LIANZHONG ENGINEERING TECHNOLOGY Co.,Ltd. Registration number: Y2022980019563 |
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Granted publication date: 20151028 Pledgee: Jiangsu SINOSURE technology microfinance Co.,Ltd. Pledgor: NANJING LIANZHONG ENGINEERING TECHNOLOGY Co.,Ltd. Registration number: Y2022980019563 |
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