CN109750568A - A kind of road structure and its construction method with pile foundation bent cap - Google Patents
A kind of road structure and its construction method with pile foundation bent cap Download PDFInfo
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- CN109750568A CN109750568A CN201910182725.XA CN201910182725A CN109750568A CN 109750568 A CN109750568 A CN 109750568A CN 201910182725 A CN201910182725 A CN 201910182725A CN 109750568 A CN109750568 A CN 109750568A
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- bent cap
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- friction pile
- pile
- breast boards
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- 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
Abstract
The invention discloses a kind of road structures with pile foundation bent cap, comprising: friction pile, bent cap, weight tray, breast boards, roadbed filling material and road surface structare layer, friction pile is arranged and is located at the middle part of the transverse direction of road along the longitudinal direction interval of road, a bent cap is fixed at the top of each friction pile, bent cap is the cantilever beam extended on the outside of side slope, the both ends of breast boards are connected to two neighboring friction pile, roadbed filling material is filled between breast boards and side slope, the both ends of weight tray are located at the upper surface of two neighboring bent cap；Road surface structare layer is equipped with above roadbed filling material and weight tray.The invention further relates to the construction methods of above-mentioned road structure.The configuration of the present invention is simple can disturb unfavorable geology and hard and dangerous landform side slope less as much as possible, be effectively reduced the risk for causing Secondary Geological Hazards, save bricklaying and steel, reduce the road excavation amount of filling, technology and obvious economic.
Description
Technical field
The invention belongs to technical field of road construction, are related to a kind of road structure and its construction party with pile foundation bent cap
Method.
Background technique
Large medium-size station construction at present is more to be in northwest China portion (Sichuan, Yunnan, Tibet etc.) area, rivers two
Bank landform is steep, complex geologic conditions, and the road engineering arrangement of the construction of hydropower stations is transported by main structures arrangement, material equipment
The factors such as whereabouts and general layout for construction, landform, geology influence.Meanwhile after water storage is built up in power station, dam site upstream water level
It obviously raises, reservoir area is rebuilded traffic engineering and need to be rebuilded at the suitable high line more than normal pool level elevation.Therefore in field
Road and reservoir area are rebuilded traffic engineering and are often faced across many unfavorable geologies (landslide, accumulation body, bank slump etc.) and steep hardships and dangers
The situation in landform section need to take necessary reliable roadbed resolution, guarantee the monolithic stability of side slope, roadbed using safe
And the normal operation of route.
Currently, mostly using friction pile as road shoulder wall greatly across many unfavorable geologies (landslide, accumulation body, bank slump etc.) section
Or cutting wall supporting and retaining system forms roadbed, or forms full face roadbed scheme using pile foundation joist retaining wall supporting and retaining system；Across steep difficult
The scheme ('South bridge and north tunnel' option) that strategical vantage point shape takes bridge or tunnel to cross over mostly.Above-mentioned full face roadbed scheme or 'South bridge and north tunnel' option are past
Toward leading to following shortcoming: (1) consumptions such as friction pile, retaining wall, bridge and tunnel bricklaying, steel are more, road excavation
The amount of filling and side slope protection amount are more；(2) execution conditions are poor, and construction organization and construction technical schemes are more complex；(3) economy
Effect difference etc..
Summary of the invention
For it is above-mentioned it is existing unfavorable geology and hard and dangerous landform section frequently with tunneling boring roadbed administer or bridge tunnel tradition
The shortcoming of scheme, the present invention provide a kind of road structure and its construction method with pile foundation bent cap, adapt in landform
Precipitous, amount of excavation is big and general road shoulder formula retaining wall is difficult to form the section of roadbed, greatly reduces road excavation and fills and side
The design and project amount of slope supporting and retaining system protection；It is avoided that slope excavating or load cause to lose when unfavorable geology section is built highway again
It surely collapses, the disturbance to unfavorable geologic body can be reduced as much as possible.Specific technical solution is as follows.
A kind of road structure with pile foundation bent cap characterized by comprising friction pile, bent cap, weight tray, earth-retaining
Plate, roadbed filling material and road surface structare layer, the friction pile are arranged along the longitudinal direction interval of road and are located at the cross of road
To the middle part in direction, the bent cap is fixed at the top of each described friction pile, the bent cap is to prolong on the outside of side slope
The cantilever beam stretched, the both ends of the breast boards are connected to the two neighboring friction pile, between the breast boards and side slope
Filled with the roadbed filling material, the both ends of the weight tray are located at the upper surface of the two neighboring bent cap；It is described
Road surface structare layer is equipped with above roadbed filling material and the weight tray.
Road structure of the invention, the outside of roadbed are that cantilever is maked somebody a mere figurehead, inside is filling roadbed pattern, and structure is simple, energy
It disturbs unfavorable geology and hard and dangerous landform side slope less as much as possible, is effectively reduced the risk for causing Secondary Geological Hazards, saves trowel used for plastering
Work and steel reduce the road excavation amount of filling.Wherein, roadbed is inside, side of the roadbed far from side slope close to the side of side slope
For outside.
In order to improve friction pile stability and reduce friction pile sectional dimension, the road structure further include have it is anti-
The outer end of sliding pile anchor cable, the friction pile anchor cable is anchored in the outer surface of the friction pile, and inner end anchor is in side slope.
Further, setting in the friction pile and the bent cap one moulding by casting, the friction pile and the bent cap
There is prestressed strand, the outer end of the prestressed strand is anchored in the outer surface of the bent cap, and inner end anchor is in the friction pile.
Prestressed strand is provided with the stability for being conducive to improve friction pile and bent cap.
Further, the breast boards is precast construction and offers through-hole, and the through-hole is through the outer of the breast boards
Surface and inner surface, and the through-hole is between the two neighboring friction pile.The through-hole can be used as bulkhead construction and hang
Hole for hoist when dress, after the completion of construction, which uses as drain hole, ponding in roadbed filling material is discharged.
Further, the outer end of the bent cap is embedded with connection reinforcing bar, is provided with above the outer end of the bent cap anti-
Hit guardrail basis, anticollision barrier basis top be provided with anticollision barrier, the anticollision barrier basis and anticollision barrier along
The longitudinal direction of road extends；The connection reinforcing bar lower end is located in the outer end of the bent cap, and upper end is located at anticollision shield
In column.So set, being conducive to improve the bonding strength on anticollision barrier basis and anticollision barrier and bent cap, improve on the outside of roadbed
Partial globality.Preferably, one of expansion joint is arranged every 10 ~ 15m in the anticollision barrier, and in the anticollision barrier wall
Bottom every 5 ~ 10m, one drainage hole is set.
Further, gutter is additionally provided on the inside of the road surface structare layer.
Further, the road surface structare layer above the roadbed filling material includes setting gradually bed course, base from bottom to up
Layer, base and surface layer；Road surface structare layer above the weight tray includes setting gradually concrete in-situ layer, waterproof layer from bottom to up
And surface layer.Thickness, material and the number of plies of each road surface structare layer can be calculated according to actual traffic amount and pavement structure and be used.
Based on the same inventive concept, the invention further relates to the construction methods of above-mentioned road structure, specifically includes the following steps:
1), the friction pile is arranged in interval on the longitudinal direction of road, and the friction pile is located in the transverse direction of road
Portion, the friction pile and the bent cap one moulding by casting；
2), weight tray is mounted on to the top of the bent cap；The breast boards is mounted on to the inside of the friction pile；
3) the roadbed filling material, is filled between the breast boards and side slope；
4), road surface structare layer is laid in the top of the roadbed filling material and the weight tray.
Compared with the existing tunneling boring roadbed resolution and 'South bridge and north tunnel' option used in unfavorable geology and hard and dangerous landform section,
The configuration of the present invention is simple can effectively improve the overall stiffness, drag and stability of road structure system itself, it is ensured that roadbed and
The stabilization of side slope is safe and reliable, while can disturb unfavorable geology and hard and dangerous landform side slope less as much as possible, is effectively reduced initiation
The risk of Secondary Geological Hazards saves bricklaying and steel, reduces the road excavation amount of filling, while constructing and assembling simply, to place
It is required that lower, short time limit, acquired technology and obvious economic.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view of road structure of the present invention；
Fig. 2 is the elevational schematic view of road structure of the present invention；
Fig. 3 is the A-A cross-sectional view in Fig. 1.
In figure: 1, friction pile；2, bent cap；3, breast boards；4, weight tray；5, anticollision barrier；6, drainage hole；7, anticollision is protected
Column basis；8, reinforcing bar is connected；9, roadbed filling material；10, roadbed；11, earth shoulder is hardened；12, runway；13, route center line；
14, Pavement Design elevation；15, road surface horizontal slope；16, surface layer；17, waterproof layer；18, concrete in-situ layer；19, base；20, underlayment；
21, bed course；22, gutter；23, through-hole；24, anticollision barrier expansion joint；25, prestressed strand；26, friction pile anchor cable；27,
Ground line；28, basement rock line of demarcation；29, severely-weathered lower limit.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
Referring to Fig. 1-3, the road structure with pile foundation bent cap of the invention, main use outside cantilever is aerial, inside is filled out
The novel filled-up ground structural shape built.
Route (road) trend and elevation are determined in the suitable location across unfavorable geology and hard and dangerous landform section first,
Close to road transverse direction route center line 13 nearby carry out friction pile 1 design, arrangement and implementation, friction pile 1 along
The longitudinal direction interval of road is arranged.By combining side slope ground line 27, basement rock line of demarcation 28, severely-weathered lower limit 29, roadbed to fill out
Geology and the design parameters such as material 9, Pavement Design elevation 14 are built, unfavorable geologic body (bank slump, landslide, accumulation body etc.) is comprehensively considered
It is carried out under the effects of sliding force, the soil lateral pressure of roadbed filling material 9, the self weight of road structure and traffic load and different operating conditions
Analysis is calculated, determines the optimal cross sectional shape of friction pile 1 and size.It should be noted that friction pile 1 is located at road transverse direction
Route center line 13 near, be not meant to friction pile 1 centainly in center, friction pile 1, which is in, leans on paracentral position
It sets.
The typical optimal crosssection of roadbed 10 is generally made of the runway 12 of two width of left and right and hardening earth shoulder 11.It is each
The top of a friction pile 1 is fixedly connected with a bent cap 2, and bent cap 2 is the cantilever beam extended on the outside of side slope, it is preferable that bent cap 2
With the continuous casting and constructing in top of friction pile 1, it is integrally formed.
For the sectional dimension for reducing friction pile 1 and bent cap 2, prestressed strand 25 can be carried out to friction pile 1 and bent cap 2 and resisted
The setting and tensioning of sliding pile anchor cable 26.25 outer end of prestressed strand is anchored in the outer surface of bent cap 2, and inner end anchor is in friction pile 1
In vivo；26 outer end of friction pile anchor cable, which anchors, is placed in the outer surface of friction pile 1, and inner end anchor is in side slope, such as: unfavorable geology or abrupt slope
In the steady soil or basement rock of location slopes.
In order to improve the globality of anticollision barrier and bent cap, 2 outer end of bent cap pre-buried connection reinforcing bar 8 when pouring connects steel
Muscle 8 can be stirrup, after 2 curing strength of bent cap reaches requirement, along the longitudinal direction of road point above 2 outer end of bent cap
The pouring construction of Duan Jinhang concrete anti-collision guard bar basis 7 and anticollision barrier 5, anticollision barrier 5 are located on anticollision barrier basis 7
Side；Connection 8 lower end of reinforcing bar is located in the outer end of bent cap 2, and upper end is located in anticollision barrier 5.The width on anticollision barrier basis 7 with
The width of the hardening earth shoulder 11 of outer dypass width is consistent, the top on anticollision barrier basis 7 and the top sides of road surface structare layer
Edge is concordant, and anticollision barrier basis 7 is also able to satisfy the functional requirement that hardening earth shoulder 11 is arranged simultaneously.Anticollision barrier wall 5 every 10 ~
One of expansion joint 24, while the drainage hole 6 in the bottom of anticollision barrier wall 5 every 5 ~ 10m setting one is arranged in 15m long.
When friction pile 1, bent cap 2, anticollision barrier basis 7 are constructed, breast boards 3, weight tray 4 can be carried out in prefabricated field synchronization
It is prefabricated, breast boards 3, weight tray 4 length determined according to the longitudinal pitch of two neighboring friction pile 1, can be by muti-piece
It is spliced.The both ends of weight tray 4 are located at the upper surface of two neighboring bent cap 2；The both ends of breast boards 3 are connected to
Two neighboring friction pile 1；It is preferred that the end abutment of breast boards 3 is in the inner surface of friction pile 1.Breast boards 3 is provided with through-hole 23,
Outer surface and inner surface of the through-hole 23 through the breast boards 3, and through-hole 23 is between two neighboring friction pile 1, the through-hole
23 may act as hole for hoist when construction, and can be used as the drain hole 23 under road structure normal operating condition, successively will
After the prefabricated lifting of breast boards 3 is placed into position, to saturating using sand gravelly soil, gravelly soil, excavation rock ballast etc. between breast boards 3 and side slope
Aqueous preferable roadbed filling material 9 carries out placement in layers grinding compacting until roadbed top surface.And implement in time in the inside of road
Gutter 22 forms subgrade and pavement drainage system, and mortar flag stone masonry or concreting, gutter 22 can be used in gutter 22
Entirety, which is carried out, with the hardening earth shoulder 11 of interior dypass width close to trackside furrow bank is combined setting.
After the completion of roadbed filling material 9 and weight tray 4 are constructed, then the paving for being divided to or so two width to carry out road surface structare layer respectively
It builds, it is preferable that the road surface structare layer of 9 top of roadbed filling material includes setting gradually bed course 21, underlayment 20, base from bottom to up
19 and surface layer 16；The road surface structare layer of 4 top of weight tray includes setting gradually concrete in-situ layer 18,17 and of waterproof layer from bottom to up
Surface layer 16.
In view of road surface structare layer bottom (i.e. at the top of roadbed) modulus of resilience is in roadbed filling area and pile foundation bent cap loading plate
There are apparent othernesses in area, and to keep Pavement Structure Design more economically reasonable, therefore roadbed filling area road surface structare layer can refer to
The pavement structure mode of ordinary highway roadbed section is arranged, i.e., sets gradually bed course 21, underlayment 20, base 19 from bottom to up；Stake
The pavement structure mode that the road surface structare layer in base lid joist support support plate area can refer to general bridge deck paving is arranged, i.e., from bottom to up
Set gradually concrete in-situ layer 18, waterproof layer 17；Unified cover making surface layer 16 within the scope of last subgrade cross section entire again.
Surface layer: positioned at the top layer of entire pavement structure.Directly bear the vertical force of traffic load, the work repeatedly of horizontal force
With.
Base: it is located under surface layer, on bed course or roadbed.It is primarily subjected to the effect of the analysis of wheel vertical power of surface layer transmitting,
And it is diffused into bed course and soil matrix, base may also be subjected to surface layer infiltration and the erosion of underground water.Therefore need selection intensity compared with
Height, rigidity is larger, and has the material of enough water stabilities.Base can divide two layers of making, and upper layer claims base or upper base, rise main
Load-bearing effect, lower layer then claim underlayment, play secondary load-bearing effect.The intensity requirement of subbase course material is more slightly lower than upper base, can
Local material is made full use of, to reduce project cost.
Bed course: being the level between base and soil matrix.And setting bed course is required in not all pavement structure, only
Have in soil matrix outofkilter, such as the heaving bottom of sough, Udoll base, northern area, bed course should be just set,
With the Free water for excluding road surface, being detained in roadbed, it is ensured that pavement structure is in dry or middle wet condition.Bed course mainly plays water proof
(underground water, capillary water), draining (water leaking-in), thermal insulation (anti-freeze expansion, frost boiling) effect, and transmit and spread the lotus transmitted by base
Stress is carried, guarantees that roadbed works within the scope of allowable stress.
Concrete in-situ layer: using with reference to deck paving mode, and pavement structure region is primarily subjected to surface layer biography above loading plate
The effect for the analysis of wheel vertical power passed.
Waterproof layer: using with reference to deck paving mode, and rainwater enters pile foundation bent cap loading plate region in order to prevent, rainwater,
Snow-broth, which is lauched, penetrates into beam body, plate body and other material layers set with water to the destruction such as pile foundation, bent cap and loading plate.
Thickness, material and the number of plies of each road surface structare layer can be calculated according to actual traffic amount and pavement structure and be used.Road surface
The upper surface of structure sheaf has a road surface horizontal slope 15, and road surface horizontal slope 15 guides the rainwater on road surface to the gutter 22 of inside and outer
In the drainage hole 6 of layer.
The construction method of road structure of the invention mainly comprises the steps that
1), interval setting friction pile 1, friction pile 1 are located at the middle part of the transverse direction of road, antiskid on the longitudinal direction of road
Stake 1 and the integrated moulding by casting of bent cap 2；
2), weight tray 4 is mounted on to the top of bent cap 2；Breast boards 3 is mounted on to the inside of friction pile 1；
3) roadbed filling material 9, is filled between breast boards 3 and side slope；
4), road surface structare layer is laid in the top of roadbed filling material 9 and weight tray 4.
The embodiment of the present invention is described with above attached drawing, in the absence of conflict, the reality in the present invention
The feature applied in example and embodiment can be combined with each other.The invention is not limited to above-mentioned specific embodiment, above-mentioned tool
Body embodiment is only schematical, rather than limitation, those skilled in the art under the inspiration of the present invention,
Without breaking away from the scope protected by the purposes and claims of the present invention, many forms can be also made, these belong to this
Within the protection scope of invention.
Claims (9)
1. a kind of road structure with pile foundation bent cap characterized by comprising friction pile, bent cap, weight tray, breast boards,
Roadbed filling material and road surface structare layer, the friction pile are arranged along the longitudinal direction interval of road and are located at the transverse direction side of road
To middle part, the bent cap is fixed at the top of each described friction pile, the bent cap is to extend on the outside of side slope
Cantilever beam, the both ends of the breast boards are connected to the two neighboring friction pile, fill between the breast boards and side slope
There is the roadbed filling material, the both ends of the weight tray are located at the upper surface of the two neighboring bent cap；The roadbed
It fills and is equipped with road surface structare layer above material and the weight tray.
2. a kind of road structure with pile foundation bent cap according to claim 1, which is characterized in that the road structure is also
It include friction pile anchor cable, the outer end of the friction pile anchor cable is anchored in the outer surface of the friction pile, and inner end anchor is in side slope.
3. a kind of road structure with pile foundation bent cap according to claim 1, which is characterized in that the friction pile and institute
State bent cap one moulding by casting, be provided with prestressed strand in the friction pile and the bent cap, the prestressed strand it is outer
End is anchored in the outer surface of the bent cap, and inner end anchor is in the friction pile.
4. a kind of road structure with pile foundation bent cap according to claim 1, which is characterized in that the breast boards is pre-
Structure processed and offer through-hole, outer surface and inner surface of the through-hole through the breast boards, and the through-hole be located at it is adjacent
Between two friction piles.
5. a kind of road structure with pile foundation bent cap according to claim 1, which is characterized in that the outer end of the bent cap
Portion is embedded with connection reinforcing bar, and anticollision barrier basis, anticollision barrier basis top are provided with above the outer end of the bent cap
Anticollision barrier, the anticollision barrier basis and anticollision barrier is provided with to extend along the longitudinal direction of road；The connection reinforcing bar
Lower end is located in the outer end of the bent cap, and upper end is located in the anticollision barrier.
6. a kind of road structure with pile foundation bent cap according to claim 5, which is characterized in that the anticollision barrier is every
Every 10 ~ 15m, one of expansion joint, and the drainage hole in the bottom of the anticollision barrier wall every 5 ~ 10m setting one are set.
7. a kind of road structure with pile foundation bent cap according to claim 1, which is characterized in that the road surface structare layer
Inside be additionally provided with gutter.
8. a kind of road structure with pile foundation bent cap according to claim 1, which is characterized in that the roadbed filling material
The road surface structare layer of top includes setting gradually bed course, underlayment, base and surface layer from bottom to up；Above the weight tray
Road surface structare layer includes setting gradually concrete in-situ layer, waterproof layer and surface layer from bottom to up.
9. a kind of construction method of the road structure as described in claim 1-8 any one, which is characterized in that including following step
It is rapid:
1), the friction pile is arranged in interval on the longitudinal direction of road, and the friction pile is located in the transverse direction of road
Portion, the friction pile and the bent cap one moulding by casting；
2), weight tray is mounted on to the top of the bent cap；The breast boards is mounted on to the inside of the friction pile；
3) the roadbed filling material, is filled between the breast boards and side slope；
4), road surface structare layer is laid in the top of the roadbed filling material and the weight tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910182725.XA CN109750568A (en) | 2019-03-12 | 2019-03-12 | A kind of road structure and its construction method with pile foundation bent cap |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910182725.XA CN109750568A (en) | 2019-03-12 | 2019-03-12 | A kind of road structure and its construction method with pile foundation bent cap |
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| CN109750568A true CN109750568A (en) | 2019-05-14 |
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ID=66408402
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| CN201910182725.XA Pending CN109750568A (en) | 2019-03-12 | 2019-03-12 | A kind of road structure and its construction method with pile foundation bent cap |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN112211059A (en) * | 2020-09-22 | 2021-01-12 | 中铁二院重庆勘察设计研究院有限责任公司 | Inclined overhanging type supporting structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN112211059A (en) * | 2020-09-22 | 2021-01-12 | 中铁二院重庆勘察设计研究院有限责任公司 | Inclined overhanging type supporting structure |
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