CN110195388A - Overhang widened structure Bang Shan highway and its construction method - Google Patents
Overhang widened structure Bang Shan highway and its construction method Download PDFInfo
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- CN110195388A CN110195388A CN201910553978.3A CN201910553978A CN110195388A CN 110195388 A CN110195388 A CN 110195388A CN 201910553978 A CN201910553978 A CN 201910553978A CN 110195388 A CN110195388 A CN 110195388A
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- cantilever beams
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- overhanging
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- 238000010276 construction Methods 0.000 title claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 106
- 239000004567 concrete Substances 0.000 claims description 23
- 238000009412 basement excavation Methods 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000009417 prefabrication Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
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- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002512 chemotherapy Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C1/00—Design or layout of roads, e.g. for noise abatement, for gas absorption
- E01C1/002—Design or lay-out of roads, e.g. street systems, cross-sections ; Design for noise abatement, e.g. sunken road
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D18/00—Bridges specially adapted for particular applications or functions not provided for elsewhere, e.g. aqueducts, bridges for supporting pipe-lines
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a kind of overhanging widened structure Bang Shan highways, if road surface is supported by spaced dry plate Cantilever Beams below, Cantilever Beams are embedded in rock side slope close to massif side, are fixed using anchor pole or anchor cable；Road surface includes Cantilever Beams without departing from flat rock side slope d meters of sections and Cantilever Beams beyond flat rock side slope d meters of sections；In Cantilever Beams without departing from flat rock side slope d meters of sections, part of the Cantilever Beams beyond flat rock side slope is hanging；Exceed flat rock side slope d meters of sections in Cantilever Beams, Cantilever Beams are supported beyond the part of flat rock side slope by oblique buttress, and buttress bottom is supported and fixed below road surface on tiltedly rock side slope；Wherein, 2.4≤d≤3.6.And its construction method.The present invention has that Cantilever Beams supporting way is single for existing Bang Shan highway, provides a kind of novel overhanging widened structure Bang Shan highway and its construction method.The overhanging girder construction can reasonably adjust supporting way on the basis of guaranteeing to meet highway items design standard.
Description
Technical field
The invention belongs to be close to mountain highway technology field.In particular it relates to a kind of Bang Shan highway using overhanging widened structure
And its construction method.
Background technique
Mountain road builds that environment is complicated and changeable, and mountain shape variation tendency is significant.In massif rock side slope gradient smaller part, rock
Matter side slope is more gentle, can suitably increase the excavation width of flat rock side slope.In massif rock side slope gradient larger part, rock matter
Side slope is more precipitous, and excavating flat rock side slope here, then difficulty increases severely, and needs to dig a large amount of rock mass, band above flat rock side slope
Huge workload is carried out, has still suffered from the risk on slope collapes landslide, more natural environment is caused compared with havoc.
Bang Shan highway is a kind of road type most commonly seen in mountain road.Cantilever Beams are along road direction by design spacing
Arrangement, is supported with road pavement.But the Cantilever Beams supporting way of existing Bang Shan highway is single, does not adapt to complicated and changeable
Construction environment.
Summary of the invention
It is an object of the invention to: there is a problem of that Cantilever Beams supporting way is single for existing Bang Shan highway, provides one
The novel overhanging widened structure Bang Shan highway of kind and its construction method.The overhanging girder construction is guaranteeing to meet highway items design standard
On the basis of, supporting way can be reasonably adjusted.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of overhanging widened structure Bang Shan highway, if road surface is supported by spaced dry plate Cantilever Beams below, overhanging
Beam is supported close to massif side by flat rock side slope, and is embedded in rock side slope；Road surface includes Cantilever Beams without departing from flat rock side slope d
Rice section and Cantilever Beams exceed flat rock side slope d meters of sections；In Cantilever Beams without departing from flat rock side slope d meters of sections, Cantilever Beams are super
The part of flat rock side slope is hanging out；Exceed flat rock side slope d meters of sections in Cantilever Beams, Cantilever Beams exceed the portion of flat rock side slope
Divide and supported by oblique buttress, buttress bottom is supported and fixed below road surface on tiltedly rock side slope；Wherein, 2.4≤d≤3.6.We
Case passes through the reasonable analysis of road pavement stress, and designing one kind can effectively arrange on the basis of meeting highway layout standard
The half of bridge of stress.
Preferably, part of the Cantilever Beams above flat rock side slope is connected with flat rock side slope by anchor rod component
It connects.This programme is fixed using anchor pole or anchor cable, and Cantilever Beams part can be made to meet force request.
Preferably, anchor rod component includes vertical anchor pole and horizontal anchor pole, and vertical anchor pole is by Cantilever Beams bottom and puts down
Rock side slope is connected, and Cantilever Beams are connected close to the end of massif with the oblique rock side slope above flat rock side slope by horizontal anchor pole.
This programme keeps half of bridge structure more stable using combining vertically with horizontal anchorage style.
Preferably, the inclined direction of buttress supports Cantilever Beams, and buttress fulcrum is located at Cantilever Beams close to cheuch one
The end of side.Buttress fulcrum is located at overhanging beam end, keeps buttress and overhanging beam stress more reasonable.
Preferably, be in angle is α between buttress and Cantilever Beams, wherein 40 °≤α≤50 °.
Preferably, Cantilever Beams exceed the part of flat rock side slope, and top road surface is concrete prefabricated board；Its remaining part
It is divided into cast-in-place concrete.By concrete prefabricated board, the difficulty of construction on Cantilever Beams top road surface can be greatly reduced, saves construction
Cost shortens construction period.
Preferably, the limiting section for limiting concrete prefabricated Board position is provided on Cantilever Beams.This programme energy
The position of enough effectively limitation concrete prefabricated boards, makes highway have more stable overall structure.
A kind of construction method applied to above-mentioned overhanging widened structure Bang Shan highway, including following working procedure:
One, the excavation pit on rock side slope, as the flat rock side slope for being used to support Cantilever Beams；
Two, it is located at Cantilever Beams one end on flat rock side slope in place to flat rock side slope Cantilever Beams lifting, the other end is outstanding
It is empty；
Three, exceed flat rock side slope d meter sections in Cantilever Beams, apply oblique buttress on oblique rock side slope below the road surface,
To support Cantilever Beams to exceed the part of flat rock side slope；
Four, the placing microdilatancy concrete between Cantilever Beams and rock mass pushes against Cantilever Beams and country rock；
Five, highway pavement part is applied on Cantilever Beams.
Preferably, in step 1, after excavation of foundation pit completion, smooth punishment also is carried out to foundation pit substrate；?
After the smooth punishment of foundation pit substrate, concrete is also poured in foundation pit, the bed course as flat rock side slope support Cantilever Beams.
Preferably, for step 2 in five, Cantilever Beams are located at flat rock side slope by prefabrication on Cantilever Beams
The pre-buried pipeline in position, as the mounting hole for applying anchor pole.
In conclusion by adopting the above-described technical solution, compared with the prior art, the beneficial effects of the present invention are: this
Invention carries out reasonable force analysis by road pavement, and designing one kind can have on the basis of meeting highway layout standard
The half of bridge of effect arrangement stress, can effectively widen mountain road by half of bridge.Also, the present invention has stabilized structure, applies
Work difficulty is low, short construction period, the low every feature of construction cost.
Detailed description of the invention
Fig. 1 is the elevation of embodiment 1.
Fig. 2 is the plan view of embodiment 1.
Fig. 3 is I-I face figure of embodiment 1.
Fig. 4 is II-II face figure of embodiment 1.
Label corresponding to component in attached drawing: 1- Cantilever Beams, 2- buttress, 3- anchor rod component, 4- concrete prefabricated board, 5- limit
Position portion, 6- bed course, 7- bearing piece, the road surface 8-, 9- gutter.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Embodiment 1
Present embodiment discloses a kind of overhanging widened structure Bang Shan highways, and as shown in Figs 1-4, road surface is set by being spaced below
If the dry plate Cantilever Beams support set, Cantilever Beams are supported close to massif side by flat rock side slope, and are embedded in rock side slope, using anchor
Bar or anchor cable are fixed；Road surface includes Cantilever Beams without departing from flat rock side slope d meters of sections and Cantilever Beams beyond flat rock side slope d meters of roads
Section；In Cantilever Beams without departing from flat rock side slope d meters of sections, part of the Cantilever Beams beyond flat rock side slope is hanging, Cantilever Beams and flat
Bearing piece is set between rock side slope edge and is used to support Cantilever Beams；Exceed flat rock side slope d meters of sections in Cantilever Beams, Cantilever Beams are super
The part of flat rock side slope is supported by oblique buttress out, and buttress bottom is supported and fixed below road surface on tiltedly rock side slope；Wherein,
D=3.When Cantilever Beams are within 3m, Cantilever Beams top only accounts for half of lane, and one wheel of vehicle is not necessarily to when being pressed in above Cantilever Beams
Buttress support.If when Cantilever Beams are more than 3m, entire vehicle bilateral wheel is just all pressed in widened section traveling, at this time with regard to needing to do
Buttress support.
As shown in Figure 3-4, part of the Cantilever Beams above flat rock side slope is connected with flat rock side slope by anchor rod component
It connects.Anchor rod component includes vertical anchor pole and horizontal anchor pole, and Cantilever Beams bottom is connected by vertical anchor pole with flat rock side slope, horizontal anchor
Cantilever Beams are connected close to the end of massif with the oblique rock side slope above flat rock side slope by bar.
As shown in figure 3, the inclined direction of buttress supports Cantilever Beams, and buttress fulcrum is located at Cantilever Beams close to cheuch side
End.Be in angle is α between buttress and Cantilever Beams, wherein α=45 °.When rock side slope near vertical, filled out across roadbed
Fang Shifen is difficult, and this programme switchs to this section and sets.
As shown in Figure 3-4, Cantilever Beams exceed the part of flat rock side slope, and top road surface is concrete prefabricated board；Its remaining part
It is divided into cast-in-place concrete, and applies gutter for draining close to side slope side on road surface.Concrete prefabricated board is using reinforced concrete letter
Branch cored slab is to mitigate Cantilever Beams upper support weight.The limit for limiting concrete prefabricated Board position is provided on Cantilever Beams
Portion.Subcrust is laid with 10cm thickness C40 concrete, and centre is laid with waterproof layer, and upper layer is laid with 10cm thickness bitumen concrete.Cantilever Beams bottom and base
20cm thickness C40 concrete bed course is laid between rock.
As shown in Figs 1-4, full-bridge substructure uses column pier, gravity type platform, and pier uses pile foundation and Extended chemotherapy.
In two sides, expansion joint is arranged in entablature；And 5 meters of long attachment straps are set in two sides abutment.Meet vertical curve by adjusting Calculation of Thickness of Bridge Deck Pavement
It is required that.Former road surface width can be 4.2 meters -6.6 meters and be widened to 7.5 meters by scheme through this embodiment.One side of something of the present embodiment
Bridge be particularly suitable for rock side slope is almost vertical, lower rock side slope be up to 20-30 meters, rock side slope be essentially complete basement rock, simultaneously
The section widened.
Embodiment 2
Compared to embodiment 1, in the present embodiment, road surface is by Cantilever Beams without departing from 2.4 meters of sections of flat rock side slope and Cantilever Beams
Beyond 2.4 meters of section compositions of flat rock side slope, making an angle alpha between buttress and Cantilever Beams is 40 °.
Embodiment 3
Compared to embodiment 1, in the present embodiment, road surface is by Cantilever Beams without departing from 3.6 meters of sections of flat rock side slope and Cantilever Beams
Beyond 3.6 meters of section compositions of flat rock side slope, making an angle alpha between buttress and Cantilever Beams is 50 °.
Embodiment 4
Present embodiment discloses it is a kind of applied to it is described in embodiment 1 overhanging widened structure Bang Shan highway construction method,
Including following working procedure:
One, the excavation pit on rock side slope, as the flat rock side slope for being used to support Cantilever Beams；
Two, it is located at Cantilever Beams one end on flat rock side slope in place to flat rock side slope Cantilever Beams lifting, the other end is outstanding
It is empty；
Three, exceed flat rock side slope d meter sections in Cantilever Beams, apply oblique buttress on oblique rock side slope below the road surface,
To support Cantilever Beams to exceed the part of flat rock side slope；
Four, the placing microdilatancy concrete between Cantilever Beams and rock mass, the preferred C30 microdilatancy concrete of microdilatancy concrete are closed, with
Cantilever Beams and country rock are pushed against；；
Five, highway pavement part is applied on Cantilever Beams.
Preferably, in step 1, after excavation of foundation pit completion, smooth punishment also is carried out to foundation pit substrate；In foundation pit base
After the smooth punishment in bottom, 15cm High Strength Concrete is also poured in foundation pit, the bed course as flat rock side slope support Cantilever Beams.Cantilever Beams
Excavation of foundation pit requirement is regular, and surface residual debris should be removed before lifting.
Preferably, step 2 is in five, and Cantilever Beams are located on Cantilever Beams the position of flat rock side slope by prefabrication
Pre-buried pipeline, as the mounting hole for applying anchor pole.Cantilever Beams use C40 reinforced concrete structure, and concentration pre-casting work can carry out in advance,
Progress can also be synchronized, when meeting 95% wait overhang beam strength, i.e., Liftable is in place.Anchor pole uses Φ 32mm anchor pole, Cantilever Beams
Interior pre-buried Φ 65mmPVC pipe applies anchor pole for Cantilever Beams and is anchored at flat rock matter side as pipeline after the completion of Cantilever Beams lifting
On slope.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of overhanging widened structure Bang Shan highway, if road surface is supported by spaced dry plate Cantilever Beams below, Cantilever Beams
It is supported close to massif side by flat rock side slope, and is embedded in rock side slope；It is characterized by: road surface includes Cantilever Beams without departing from flat
D meters of sections of rock side slope and Cantilever Beams exceed flat rock side slope d meters of sections；In Cantilever Beams without departing from flat rock side slope d meters of sections,
Part of the Cantilever Beams beyond flat rock side slope is hanging；Exceed flat rock side slope d meters of sections in Cantilever Beams, Cantilever Beams exceed flat rock matter
The part of side slope is supported by oblique buttress, and buttress bottom is supported and fixed below road surface on tiltedly rock side slope；Wherein, 2.4≤d≤
3.6。
2. overhanging widened structure Bang Shan highway according to claim 1, it is characterised in that: Cantilever Beams are on flat rock side slope
The part of side, is connect with flat rock side slope by anchor rod component.
3. overhanging widened structure Bang Shan highway according to claim 2, it is characterised in that: anchor rod component includes vertical anchor pole
And Cantilever Beams bottom is connected by horizontal anchor pole, vertical anchor pole with flat rock side slope, horizontal anchor pole is by Cantilever Beams close to the end of massif
Portion is connected with the oblique rock side slope above flat rock side slope.
4. overhanging widened structure Bang Shan highway according to claim 1, it is characterised in that: the inclined direction support of buttress is outstanding
Outrigger, and buttress fulcrum is located at Cantilever Beams close to the end of cheuch side.
5. overhanging widened structure Bang Shan highway according to claim 4, it is characterised in that: be between buttress and Cantilever Beams
Angle is α, wherein 40 °≤α≤50 °.
6. overhanging widened structure Bang Shan highway according to claim 1, it is characterised in that: Cantilever Beams exceed flat rock side slope
Part, top road surface be concrete prefabricated board；Rest part is cast-in-place concrete.
7. overhanging widened structure Bang Shan highway according to claim 6, it is characterised in that: be provided on Cantilever Beams for limiting
Make the limiting section of concrete prefabricated Board position.
8. a kind of construction method of overhanging widened structure Bang Shan highway described in claim 1, which is characterized in that including applying as follows
Work process:
One, the excavation pit on rock side slope, as the flat rock side slope for being used to support Cantilever Beams；
Two, it is located at Cantilever Beams one end on flat rock side slope, the other end is hanging in place to flat rock side slope Cantilever Beams lifting；
Three, exceed flat rock side slope d meter sections in Cantilever Beams, tiltedly oblique buttress is applied on rock side slope below the road surface, to prop up
Support the part that Cantilever Beams exceed flat rock side slope；
Four, the placing microdilatancy concrete between Cantilever Beams and rock mass pushes against Cantilever Beams and country rock；
Five, highway pavement part is applied on Cantilever Beams.
9. overhanging widened structure Bang Shan highway according to claim 8, it is characterised in that: in step 1, in excavation of foundation pit
After completion, smooth punishment also is carried out to foundation pit substrate；After the smooth punishment of foundation pit substrate, concrete is also poured in foundation pit, is made
The bed course of Cantilever Beams is supported for flat rock side slope.
10. overhanging widened structure Bang Shan highway according to claim 8, it is characterised in that: in step 2 to five, Cantilever Beams
By prefabrication, and positioned at the pre-buried pipeline in position of flat rock side slope on Cantilever Beams, as the mounting hole for applying anchor pole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910553978.3A CN110195388A (en) | 2019-06-25 | 2019-06-25 | Overhang widened structure Bang Shan highway and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910553978.3A CN110195388A (en) | 2019-06-25 | 2019-06-25 | Overhang widened structure Bang Shan highway and its construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847055A (en) * | 2019-12-10 | 2020-02-28 | 中铁十二局集团有限公司 | Bridge pier of mountain-crossing highway bridge, construction method and mountain-crossing highway bridge |
| CN111254772A (en) * | 2020-03-31 | 2020-06-09 | 浙江交工集团股份有限公司 | Large cantilever structure suitable for widening old roads of cliff road sections and construction method |
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