CN209039893U - It is close to the multilayered structure of mountain high-fill roadbed - Google Patents
It is close to the multilayered structure of mountain high-fill roadbed Download PDFInfo
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- CN209039893U CN209039893U CN201821566226.8U CN201821566226U CN209039893U CN 209039893 U CN209039893 U CN 209039893U CN 201821566226 U CN201821566226 U CN 201821566226U CN 209039893 U CN209039893 U CN 209039893U
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Abstract
The utility model relates to a kind of multilayered structures for being close to mountain high-fill roadbed, including massif, Stone Filled Embankment, drainage ditch, block stone, soil-stone material, Mountain body platform, platform and horizontal slope；It is terraced structure that massif, which excavates, and massif is equipped with Mountain body platform；The hawthorn section roadbed filling of the massif lower part of step has Stone Filled Embankment, and the thickness that paves of Stone Filled Embankment fills stone no more than 60cm as the block stone of different sizes of 20~30cm, there are gaps between block stone；Stone Filled Embankment top surface is equipped with non-woven geotextile；Stone Filled Embankment is made of slope classification, and platform is equipped between every grade of slope, and slope ratio of slope is consistent；The slope bottom of Stone Filled Embankment is equipped with the drainage ditch of inverted trapezoidal；Stone Filled Embankment top surface to roadbed bottom stage filling has soil-stone material.The beneficial effects of the utility model are: the utility model is filled on roadbed stratum using block stone, at the same time as top drainage pervious bed, unimpeded, influence of the reduction operation phase surface water to subgrade stability of subgrade drainage after roadbed filling ensure that.
Description
Technical field
The utility model relates to a kind of multilayered structures for being close to mountain high-fill roadbed, belong to subgrade construction field.
Background technique
The depth of fill is greater than 18m (soil property) or the roadbed of 20m (stone matter) belongs to high-fill roadbed.
High-fill roadbed is widely distributed in China mountain area, has following basic characteristics:
1, high-fill roadbed filling height is high, it is desirable that roadbed must include enough overall stability, enough intensity and
Rigidity, enough hydrothermal stabilities；
2, roadbed filling project amount is big, long in time limit, causes to fill more problems, Construction control is relatively difficult；
3, embankment cumulative settling itself is big, and the settlement after construction of control embankment unit filling height requires more stringent；
Based on the above feature, after roadbed filling finishes, taking around longer time can just tend towards stability, this is because
After roadbed filling finishes, although the soil pressure that ground is born tends towards stability, in use process other than soil pressure, it
It will also be by driving a vehicle and many factors such as environment are influenced.
Therefore, it needs to seek a kind of construction that can guarantee high-fill roadbed speed of application and quality and cost is not high at present
Method.
Utility model content
The purpose of the utility model is to overcome deficiency in the prior art, provides and a kind of be close to the multi-level of mountain high-fill roadbed
Structure.
This multilayered structure for being close to mountain high-fill roadbed, including massif, Stone Filled Embankment, drainage ditch, block stone, native stone mixing
Material, Mountain body platform, platform and horizontal slope；It is terraced structure that massif, which excavates, and massif is equipped with Mountain body platform；The massif lower part of step
Hawthorn section roadbed filling have a Stone Filled Embankment, for the thickness that paves of Stone Filled Embankment no more than 60cm, filling stone is 20~30cm
Block stone of different sizes, there are gaps between block stone；Stone Filled Embankment top surface is equipped with non-woven geotextile；Stone Filled Embankment is by slope point
Grade forms, and platform is equipped between every grade of slope, and slope ratio of slope is consistent；The slope bottom of Stone Filled Embankment is equipped with the drainage ditch of inverted trapezoidal；It fills out
Stone embankment top surface to roadbed bottom stage filling has soil-stone material, is equipped with platform, the ratio of slope of its underpart Steep Slope Embankment between every grade of slope
It is same with the Slope Facies of Stone Filled Embankment；It is symmetrical trapezium structure at the top of soil-stone material, top is horizontal slope, and two waists are that ratio of slope is identical
Slope；The height of embankment of the high-fill roadbed of soil-stone material and Stone Filled Embankment composition is 20~30m.
As preferred: high-fill roadbed is divided into three-level, and every grade of slope height is 8 meters, and ratio of slope is followed successively by 1:1.5,1:1.75
And 1:1.75, the platform of 2m wide is equipped between every grade of slope.
As preferred: the horizontal slope on soil-stone material top is in symmetrical structure, the horizontal slope of center line two sides with roadbed center line
It is equipped with two-way slope surface, the opposite gradient is 2%；The slope ratio of slope of two waists is 1:1.5.
The beneficial effects of the utility model are:
1, the utility model is filled on roadbed stratum using block stone, at the same time as top drainage pervious bed, ensure that road
Base fills the unimpeded of rear subgrade drainage, reduces influence of the operation phase surface water to subgrade stability.
2, the utility model preferably realizes the satisfaction of road occupation function and the coordination of soil and water ecology environment.
Detailed description of the invention
Fig. 1 is the schematic diagram of step massif；
Fig. 2 is the schematic diagram that Stone Filled Embankment fills stone；
Fig. 3 is the schematic diagram of block stone top surface strong rammer；
Fig. 4 is the schematic diagram for filling soil-stone material；
Fig. 5 is the multilayered structure schematic diagram for being close to mountain high-fill roadbed；
Fig. 6 is high-fill roadbed cross-section diagram.
Description of symbols: massif 1, Stone Filled Embankment 2, drainage ditch 3, block stone 4, soil-stone material 5, Mountain body platform 6, platform
7, horizontal slope 8.
Specific embodiment
The utility model is described further below with reference to embodiment.The explanation of following embodiments is only intended to help to manage
Solve the utility model.It should be pointed out that for those skilled in the art, not departing from the utility model principle
Under the premise of, several improvements and modifications can be made to this utility model, these improvement and modification also fall into the utility model
In scope of protection of the claims.
The multilayered structure that the utility model is close to mountain high-fill roadbed has the following characteristics that
1, reasonable multilayered structure design, characteristic basal layer strong rammer outstanding are rockfilled mode, guarantee that Stone Filled Embankment has foot
Enough underlying strengths and stability.
2, high embankment as independent work point carry out prospective design, grasp place hydrogeologic condition, fill source and its
On the basis of property, the comprehensive designs such as basement process, structure type, Drainage Design, side slope protection are carried out, the roadbed of function is met
Road surface carrying design.
3, Stone Filled Embankment water penetration is strong, and perfect earth's surface and underdrainage system is arranged, carries out slope protection in time, coordinates
Earth's surface, the interflow subsurface drainage design of environment.
The utility model is suitable for the high-fill roadbed that height of embankment is 20~30m, generally can be divided into 3 grades, every grade of side slope
Height is 8 meters, and ratio of slope is followed successively by 1:1.5,1:1.75 and 1:1.75, and the platform of 2m wide is equipped between every grade of slope.In view of project
High filling section is exactly in the strip between two massifs, after roadbed filling to existing top drainage system destruction compared with
Greatly, to guarantee the unimpeded of the subgrade drainage after roadbed filling, influence of the operation phase surface water to embankment stability is reduced, in hawthorn
Section roadbed bottom is filled using Stone Filled Embankment 2, using as top drainage pervious bed.
1, basic construction technical requirement
(1) Stone Filled Embankment building stones must select hard dysgeogenous stone, and swelling rock, easy lava and salinization rock are not
It must be used for Stone Filled Embankment, it is proposed that hard, ragstone, the saturated uniaxial compressive strength of ragstone cannot be less than 60MPa in use,
The saturated uniaxial compressive strength of medium-hard rock cannot be less than 40MPa.
(2) thickness that paves of Stone Filled Embankment is not greater than 60cm, for guarantee Stone Filled Embankment compactness, preferably select 20cm~
The stone doping of different sizes of 30cm is filled.
(3) before constructing, the filling-up thickness of Stone Filled Embankment all fronts, compaction process and quality should be determined by testing section
Control standard.20t or more heavy vibration roller layered rolling need to be used, compaction quality standard is referred to using porosity as control
Mark, construction compaction quality are jointly controlled using porosity and compaction and subsidence difference or construction parameter, it is proposed that compaction and subsidence difference average value
5mm should be not more than, standard deviation is not more than 3mm.
Hard stone compaction quality control standard
Middle admant material compaction quality control standard
(4) after the completion of Stone Filled Embankment is filled, heavy tamping treatment should be carried out to rock-filling embankment, strong rammer Specifications require detailed
See dynamic consolidation construction requirement.
(5) after rock-filling embankment heavy tamping treatment, one layer of non-woven geotextile is spread as anti-filter separation layer on embankment top.Nonwoven geotechnique
The mass area ratio of cloth is preferably 350~500g/m2, elongation < 50%, gripping strength >=1600N, tearing strength >=
800N punctures intensity >=800N, CBR bursting strength >=3500N.
(6) Stone Filled Embankment edge is built using code, and code is built with a thickness of 2m, and the minimum dimension of code masonry block is no less than 30cm.
2, dynamic consolidation construction process specifications
High roadbed and Steep Slope Embankment, Stone Filled Embankment top surface carries out enhancing ftercompction using strong rammer, to eliminate the difference between roadbed
Mutation shape reduces settlement of subgrade.
(1) the unit tamping energy of strong rammer measures 3000KNm/m2, hammer ram refetches 22t, bottom shape under normal circumstances
Circle is preferably used, hammer bottom static pressure force value can use 48kPa, and rams and determine by scene examination.
(2) ramming times of tamping point are generally 6 times, should ram obtained ramming times and ramming volume relation curve by scene examination
It determines, and following condition should be met simultaneously:
1. the last two average ramming volumes hit are not more than 50mm, total ramming volume is also required to ram total ramming volume not less than examination
90%.
2. excessive protuberance should not occur for ground around tamping pit.
3. hammer difficulty has not occurred because tamping pit is too deep.
(3) ram pass and use 2 times under normal circumstances, finally ram one time again with low energy, ram for twice between the time
Interval generally 1~2 week.
(4) tamping point position is arranged using equilateral triangle, and first pass tamping point spacing can use 5~7m, later each time rammer
Hitting a spacing can be identical as first pass, can also suitably reduce.
(5) according to the strong rammer parameter primarily determined, dynamic compaction test scheme is proposed, the scene examination of progress is rammed.It should be according to different soil
Matter condition is rammed place to examination and is tested, and compares with preceding test data is rammed after several weeks are set in examination rammer end one, and inspection is strong
Effect is rammed, determines every strong rammer parameter that engineering uses.
(6) forbid strong rammer within the scope of barricade and pipe culvert 5m.
3, roller compaction construction process specifications
High roadbed and Steep Slope Embankment, Stone Filled Embankment top surface is filling roadbed to roadbed bottom, adopts after the completion of every 3m roadbed filling
Enhancing ftercompction is carried out with impact-rolling, to eliminate the differential deformation between roadbed, reduces settlement of subgrade.
(1) it is proposed with triangle two-wheel impact road roller of the impact energy more than 25 kilojoules, two-wheel net weight is not less than
12t, compacting width are not less than 2 × 900mm, and trailer travel speed is between 10km/h~15km/h, frequency of impact 60~110
Beat/min, a compacting is completed after once rolling back and forth, compacting width is not less than 4m.
(2) test section pressure testing should be carried out before impact-rolling implementation, test segment length is not less than 150m, and width is not less than
8m measures absolute altitude at impact-rolling 5,10,15,20,25 times, every punching press 5 times settling amounts is calculated, if average settlement amount <
When 30mm, punching press can be stopped；If average settlement amount still > 30mm, continues punching press.According to " highway impact-rolling application skill
Art guide " requirement, roadbed shocking rolling number is up to 30 times.Meanwhile to each item number such as the water content of test section, compactness
According to summarizing, reasonable compacting counting is determined, for instructing full section subgrade construction.
(3) impact-rolling face length is advisable with 200~500m, and when shock compaction should uniformly roll, adjacent two sections of punchings
It hits and rolls the lap of splice not less than 15m.
(4) when impact roller works, compact wheel outer rim should keep the safe distance for being not less than 1m with shoulder, with
Prevent the big and easy to damage packing course edge of impact energy.Punching press corner and Turning regions are the weak links of compacting, using taking it
He is compacted in measure, to reach design standard.
(5) culvert, barricade section are encountered, it is also necessary to guarantee corresponding safe distance.
(6) when TGXG and geotextiles are vertically banketed greater than 1.5m, impact-rolling can be carried out.
(7) before the reinforcement compacting of every 3m, general road roller pressing must be used laggard to design compactness by roadbed at the absolute altitude
Row, and impact-rolling is carried out again after the filler of preferably one layer of 30cm or more of pine paving.
(8) it to sprinkle water in right amount when packing course dry tack free, prevent surface dust, influence energy and transmitted to deep layer.
(9) driver should adjust turning route in each turning, repeat impact energy cam point with previous drop point,
To reduce wave phenomenon.
(10) during shocking rolling, if there is springing, punching press should be paused immediately.Take dig sunning or other
Measure rear can proceed with enhancing ftercompction.
(11) after the completion of impact-rolling, it is necessary to restore roadbed horizontal slope and flatness, be conducive to subgrade drainage.
4, construction monitoring requirement
According to code requirement, high embankment and Steep Slope Embankment to roadbed welding with filler wire height greater than 20m should carry out construction prison
It surveys, monitoring content mainly includes two aspects of sedimentation and displacement.
(1) road section scope is monitored
Mono- section part of the every 40m of high filling section lays monitoring point.
(2) plate and skirt piles installation position are settled
Each monitoring section is equipped with 2 surface displacement stakes, settles plate at 3.
1st sedimentation plate is set at Stone Filled Embankment top surface, is laterally positioned in the outer 1m of the 1st grade of platform slope foot；2nd and the 3rd
Sedimentation plate is set to road surface and pushes up at lower 4m, and 2 blocks of sedimentation plates are respectively two lateral extent earth shoulder edge 0.25m of roadbed under normal circumstances
Position；If left side is exactly at abrupt slope, the laying for settling plate can make the appropriate adjustments according to actual landform and condition of construction.
3 displacement skirt piles are arranged in 1 section, and respectively apart from right side roadbed slope foot 0.5m, drain off floodwaters canal outer ledge 1m and 6m
Place.
High roadbed reclamation and settlement monitoring
(3) observing frequency and period are monitored
Observation in construction period every 3 days is primary；If filling, interval time is longer, and generally observation is primary every other week；Embankment is filled out
After having built, once, the 2nd month primary every observation in 15 days for observation every other week within the 1st month, observes one every month within the 3rd month
It is secondary, it can be until surfacing after settlement stability.
Road surface structare layer observing frequency: every layer of observation is primary.If the secondary time phase difference that rolls of a level is very short, can close
And it once observes.If interval time is longer, the 1st month primary every observation in 15 days, and monthly observation is primary from the 2nd month.
Monitoring cycle is that highway is built up after operation 1 year.
(4) Analysis of Observation
All observation data should record in time, calculate, check, summarize at any time, and finishing analysis, and various curves must the same day
Draw, to find out each measuring point plots changes from figure, can fully understand, analysis of slope situation of change and judge,
It verifies whether it reaches expected effect, should adopt remedial measures if not up to.If at find the problem check in time or repetition measurement
Reason.
Roadbed filling construction period, for the sedimentation of embankment center per 10mm is not greater than round the clock, skirt piles displacement is every round the clock must not be big
In 5mm, it is 40mm that settlement amount after construction, which controls standard,；Laying of roadway must carry out after settlement stability, under the conditions of waiting load, calculate
Settlement amount after construction be less than control standard when, and continuous 2 months monitoring settling amount be monthly no more than 5mm, can excavate road slot,
Start laying of roadway.
(5) dynamic controls
Earth's surface monitoring dynamic observation is the monitoring measurement project that must implement.The result of monitoring measurement is timely feedbacked to design
Represent, timely to be checked to original design, make necessary adjustment with it is perfect, that is, carry out dynamic design and informationization and apply
Work, to achieve the purpose that economical rationality and safe and reliable.
Claims (3)
1. a kind of multilayered structure for being close to mountain high-fill roadbed, which is characterized in that including massif (1), Stone Filled Embankment (2), draining
Canal (3), block stone (4), soil-stone material (5), Mountain body platform (6), platform (7) and horizontal slope (8)；It is step that massif (1), which excavates,
Structure, massif (1) are equipped with Mountain body platform (6)；The hawthorn section roadbed filling of massif (1) lower part of step has Stone Filled Embankment
(2), the thickness that paves of Stone Filled Embankment (2) fills the block stone (4) of different sizes that stone is 20~30cm, block no more than 60cm
There are gaps between stone (4)；Stone Filled Embankment (2) top surface is equipped with non-woven geotextile；Stone Filled Embankment (2) is made of slope classification, often
Grade is equipped with platform (7) between slope, and slope ratio of slope is consistent；The slope bottom of Stone Filled Embankment (2) is equipped with the drainage ditch (3) of inverted trapezoidal；It fills out
Stone embankment (2) top surface to roadbed bottom stage filling has soil-stone material (5), is equipped with platform (7) between every grade of slope, its underpart abrupt slope road
The ratio of slope of dike and the Slope Facies of Stone Filled Embankment (2) are same；It is symmetrical trapezium structure at the top of soil-stone material (5), top is horizontal slope
(8), two waists are the identical slope of ratio of slope；The height of embankment of the high-fill roadbed of soil-stone material (5) and Stone Filled Embankment (2) composition
For 20~30m.
2. the multilayered structure according to claim 1 for being close to mountain high-fill roadbed, which is characterized in that high-fill roadbed is divided into
Three-level, every grade of slope height are 8 meters, and ratio of slope is followed successively by 1:1.5,1:1.75 and 1:1.75, and the platform of 2m wide is equipped between every grade of slope
(7)。
3. the multilayered structure according to claim 1 for being close to mountain high-fill roadbed, which is characterized in that soil-stone material (5)
The horizontal slope (8) on top is in symmetrical structure with roadbed center line, and the horizontal slope (8) of center line two sides is equipped with two-way slope surface, opposite slope
Degree is 2%；The slope ratio of slope of two waists is 1:1.5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821566226.8U CN209039893U (en) | 2018-09-20 | 2018-09-20 | It is close to the multilayered structure of mountain high-fill roadbed |
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| CN201821566226.8U CN209039893U (en) | 2018-09-20 | 2018-09-20 | It is close to the multilayered structure of mountain high-fill roadbed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109056439A (en) * | 2018-09-20 | 2018-12-21 | 杭州市交通规划设计研究院 | It is close to the multilayered structure and construction method of mountain high-fill roadbed |
-
2018
- 2018-09-20 CN CN201821566226.8U patent/CN209039893U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109056439A (en) * | 2018-09-20 | 2018-12-21 | 杭州市交通规划设计研究院 | It is close to the multilayered structure and construction method of mountain high-fill roadbed |
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