CN202787008U - Strengthening subgrade pavement with interior provided with geotechnical permeable tube - Google Patents
Strengthening subgrade pavement with interior provided with geotechnical permeable tube Download PDFInfo
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- CN202787008U CN202787008U CN 201220492478 CN201220492478U CN202787008U CN 202787008 U CN202787008 U CN 202787008U CN 201220492478 CN201220492478 CN 201220492478 CN 201220492478 U CN201220492478 U CN 201220492478U CN 202787008 U CN202787008 U CN 202787008U
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Abstract
Provided is a strengthening subgrade pavement with an interior provided with a geotechnical permeable tube. Whether subgrade pavement internal drainage is smooth or not directly affects overall strength of a subgrade pavement structure, and thus affects carrying capacity and service life of highways. Especially in the season frozen area, damage to a subgrade pavement can be even quickened through freeze-thaw damage or reduction in strength due to the excessive large of water content of the subgrade pavement internal. The strengthening subgrade pavement with the interior provided with the geotechnical permeable tube comprises a coarse-grained soil trapezoid subgrade (1), wherein the left side slope of the coarse-grained soil trapezoid subgrade is connected with a viscous soil edging layer (2), the right side slope of the coarse-grained soil trapezoid subgrade is connected with a viscous soil edging layer, a group of geotechnical permeable tubes (3) is mounted in the viscous soil edging layer, and the upper portion of the coarse-grained soil trapezoid subgrade is connected with a pavement layer (4). The strengthening subgrade pavement with the interior provided with the geotechnical permeable tube is applied to road repairing.
Description
technical field:
the utility model relates to the reinforcement subgrade and pavement that a kind of inside has geotechnological water-permeable pipe.
background technology:
in highway engineering, common embankment fill material and base (base) layer gather materials and mainly are divided into two kinds of fine grained soils and coarse-grained soils by particle grades.Fine grained soils is mainly low liquid limit sticky (powder) soil, thin sand soil and soil property fine sand; Coarse-grained soil is mainly medium coarse sand, natural gravel, weathering gravel and gravelly soil etc.In Practical Project, ordinary priority is selected coarse-grained soil, is because the relative fine grained soils of coarse-grained soil has water stability preferably.What is called water stability preferably mainly comprises---when water content is larger, relatively descend ability that less, material has a downward or outside percolating water preferably of material granule and subgrade and pavement bulk strength has stronger frost heaving resistant ability with the little and material granule of the relatively dry that keeps the top subgrade and pavement, freezing season capillary water height and roadbed integral body.
but an insoluble problem often appears in these loose Coarse Aggregate soil when railway embankment using, it is exactly the antiscour problem of its long-term slope.So in engineering practice, common way is to adopt the clay bound edge to fill in the width range of the 1m left and right of roadbed limit section, and bound edge fills and need make progress until the training curb from toe.Therefore, the embankment after the clay bound edge of low permeability, the water of subgrade and pavement inside can't transverse row go out roadbed, can only be to permeate to the roadbed bottom by the hole between grogs.And the embankment bottom is also as a rule the natural ground of low permeability.Like this subgrade and pavement of drainage condition be unstable be also non-resistant, it faces following problem: the speed that 1. soil layer that water content is relatively large, intensity is greatly affected of embankment bottom meeting long-term existence, and the existence of this soil layer also can affect upper water infiltration downwards even occurs that in freezing season stronger capillary water rises; Although 2. coarse-grained soil has stronger penetrating power, also still have certain ability in conjunction with water or resident water.So, when drainage condition is bad, embankment top subgrade and pavement water content also can maintain higher level; 3. in the situation that some are common or at some privileged sites, such as the water of the privileged sites such as end of the bridge shake gravel fail the high-moisture embankment (water content can reach more than 8%) of in time fully draining, embankment, road surface that overall height is less than the roadbed work area degree of depth (being generally 2-3m) occur crack or and have than the embankment of fast water amount etc., excessive moisture can't be discharged smoothly and be encroached on for a long time subgrade and pavement.
thus, even use coarse-grained soil to gather materials as embankment fill material and base (base) layer, the existence of excessive moisture in soil, also can cause material granule and the decline of subgrade and pavement bulk strength, freezing season capillary water rising fully and the increasing of material granule and the whole frost heave infringement of roadbed.That is to say, for result of use and the application life that guarantees subgrade and pavement, even coarse-grained soil gathers materials as embankment fill material and base (base) layer, also must guarantee that subgrade and pavement has enough internal drainage measures, has especially adopted coarse-grained soil subgrade and the road surface structare layer of clay bound edge.
whether the subgrade and pavement internal drainage is smooth and easy, directly has influence on the bulk strength of roadbed and road structure, thereby affects supporting capacity and the application life of highway.Especially in seasonal frost region, subgrade and pavement interior moisture content excessive and the freeze-thaw damage that causes or intensity descend and can accelerate the destruction of subgrade and pavement especially.So subgrade and pavement internal drainage measure must be strengthened, make unnecessary moisture as early as possible away from road surface, discharge roadbed as early as possible, subgrade and pavement is worked under relatively good humidity environment, thereby guarantee intensity and the application life of subgrade and pavement.
theory support, the theory support of this programme comes from our scientific research and testing achievement, as follows:
(1), for the stabilized with inorganic binder material, while being 8d equally without lateral confinement resistance to compression test specimen, the intensity level contrast of immersion 1d and not immersion, the low 0.5MPa(low 25% of the intensity that the strength ratio after immersion 1d is not soaked), and strength criterion is poor and deviation factor is multiplied especially;
unconfined compression strength achievement summary sheet
(2), by this test result, infer, the intensity of full water route base is also much lower than the intensity of suitably moisture roadbed;
(3), compare road surface base (base) layer of natural moisture content (4% left and right), road surface base (base) layer of full water (8% left and right), after freeze thawing, more can aggravate and accelerate the failure.The situation of roadbed similarly.
summary of the invention:
the inside that it is good that the purpose of this utility model is to provide a kind of drainage effect has the reinforcement subgrade and pavement of geotechnological water-permeable pipe.
above-mentioned purpose realizes by following technical scheme:
a kind of inside has the reinforcement subgrade and pavement of geotechnological water-permeable pipe, its composition comprises: the trapezoidal roadbed of coarse-grained soil, the slope, left side of the trapezoidal roadbed of described coarse-grained soil connects the cohesive soil edging layer, the slope, right side of the trapezoidal roadbed of described coarse-grained soil connects the cohesive soil edging layer, one group of geotechnique's water-permeable pipe is housed, link road surface layer above the trapezoidal roadbed of described coarse-grained soil in described cohesive soil edging layer.
described inside has the reinforcement subgrade and pavement of geotechnological water-permeable pipe, described geotechnological water-permeable pipe the inner extends in the trapezoidal roadbed of described coarse-grained soil, the described geotechnological water-permeable pipe outside extends to outside described cohesive soil edging layer, and described geotechnological water-permeable pipe is inner to be wrapped up in geotechnological fabric width.
beneficial effect:
1. the geotechnological water-permeable pipe minimum diameter that the utility model adopts is 10cm, geotechnological water-permeable pipe anticorrosive, acid and alkali-resistance is strong, the tube wall void content is greater than 85%, ring stiffness is greater than 16Kpa; Geotechnique's water-permeable pipe longitudinal gradient is 3.0%, and the outlet of the geotechnique of lower floor water-permeable pipe has exceeded more than the 25cm of ground makes permeable better effects if.
geotechnological water-permeable pipe of the present utility model the inner fully contacts or extend into 1.0m in roadbed filling with roadbed filling, roadbed 10cm has been stretched out in the outside; Geotechnique's water-permeable pipe the inner has been used the geotechnological fabric width supporting with the geotextile tube adventitia to wrap up in, and geotextiles has good water permeability.
the utility model geotechnique water-permeable pipe is exposed in the air of relatively dry, and the water of subgrade and pavement limit section comprises that the excessive moisture between construction period and operating period can take the lead in discharging roadbed by gutter; Because Free water has the characteristics of " to the relatively dry zone-transfer ", so the continuous gutter by roadbed limit section in the land and water of subgrade and pavement inside is discharged roadbed, and make the whole roadbed humidity in a kind of less for a long time.
if one there is no the highway of subgrade and pavement internal drainage facility is within common 8 years, to enter overhaul, subgrade and pavement internal drainage measure Hao highway just can reach left and right overhaul in 10 years.The utility model calculated by 1.5 years, and its direct benefit is equivalent to freely use highway 1.5 years, and indirect benefit is to alleviate the capital fund turnover problem of 1.5 years.
the accompanying drawing explanation:
accompanying drawing 1 is the structural representation of this product.
the specific embodiment:
embodiment 1:
a kind of inside has the reinforcement subgrade and pavement of geotechnological water-permeable pipe, its composition comprises: the trapezoidal roadbed 1 of coarse-grained soil, the slope, left side of the trapezoidal roadbed of described coarse-grained soil connects cohesive soil edging layer 2, the slope, right side of the trapezoidal roadbed of described coarse-grained soil connects the cohesive soil edging layer, one group of geotechnique's water-permeable pipe 3 is housed, link road surface layer 4 above the trapezoidal roadbed of described coarse-grained soil in described cohesive soil edging layer.Described coarse-grained soil is mainly medium coarse sand, natural gravel, weathering gravel and gravelly soil etc.
embodiment 2:
the described inside of embodiment 1 has the reinforcement subgrade and pavement of geotechnological water-permeable pipe, described geotechnological water-permeable pipe the inner extends in the trapezoidal roadbed of described coarse-grained soil, the described geotechnological water-permeable pipe outside extends to outside described cohesive soil edging layer, and described geotechnological water-permeable pipe is inner to be wrapped up in by geotextiles 5 envelopes.
Claims (2)
1. an inside has the reinforcement subgrade and pavement of geotechnological water-permeable pipe, its composition comprises: the trapezoidal roadbed that coarse-grained soil fills, it is characterized in that: the slope, left side of the trapezoidal roadbed of described coarse-grained soil connects the cohesive soil edging layer, the slope, right side of the trapezoidal roadbed of described coarse-grained soil connects the cohesive soil edging layer, one group of geotechnique's water-permeable pipe is housed, link road surface layer above the trapezoidal roadbed of described coarse-grained soil in described cohesive soil edging layer.
2. inside according to claim 1 has the reinforcement subgrade and pavement of geotechnological water-permeable pipe, it is characterized in that: described geotechnological water-permeable pipe the inner extends in the trapezoidal roadbed of described coarse-grained soil, the described geotechnological water-permeable pipe outside extends to outside described cohesive soil edging layer, and described geotechnological water-permeable pipe is inner to be wrapped up in geotechnological fabric width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220492478 CN202787008U (en) | 2012-09-25 | 2012-09-25 | Strengthening subgrade pavement with interior provided with geotechnical permeable tube |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220492478 CN202787008U (en) | 2012-09-25 | 2012-09-25 | Strengthening subgrade pavement with interior provided with geotechnical permeable tube |
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| CN202787008U true CN202787008U (en) | 2013-03-13 |
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| CN 201220492478 Expired - Fee Related CN202787008U (en) | 2012-09-25 | 2012-09-25 | Strengthening subgrade pavement with interior provided with geotechnical permeable tube |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266546A (en) * | 2013-06-06 | 2013-08-28 | 中铁二院工程集团有限责任公司 | Embankment bedding structure of ballastless track high speed railway in seasonally frozen earth area |
| CN104631254A (en) * | 2014-12-26 | 2015-05-20 | 石家庄铁道大学 | Construction method of geogrid reinforced clay edge-covered tailing subgrade |
| CN108166403A (en) * | 2017-12-15 | 2018-06-15 | 东南大学 | A kind of transverse drainage of highway subgrade and strengthening reconstruction method |
| CN109403360A (en) * | 2018-12-13 | 2019-03-01 | 黑龙江省公路科学研究院 | It is a kind of to help the roadbed side slope freeze-thaw and sliding control method for melting integrate draining based on dot matrix |
| CN112195699A (en) * | 2020-09-15 | 2021-01-08 | 中电建十一局工程有限公司 | High-groundwater-level silty roadbed filling technology |
-
2012
- 2012-09-25 CN CN 201220492478 patent/CN202787008U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266546A (en) * | 2013-06-06 | 2013-08-28 | 中铁二院工程集团有限责任公司 | Embankment bedding structure of ballastless track high speed railway in seasonally frozen earth area |
| CN103266546B (en) * | 2013-06-06 | 2016-03-16 | 中铁二院工程集团有限责任公司 | Frozen ground regions non-fragment orbit high-speed railway embankment foundation bed structure |
| CN104631254A (en) * | 2014-12-26 | 2015-05-20 | 石家庄铁道大学 | Construction method of geogrid reinforced clay edge-covered tailing subgrade |
| CN104631254B (en) * | 2014-12-26 | 2016-06-22 | 石家庄铁道大学 | A kind of construction method of Fill Reinforced With Geogrids clay bound edge CHARACTERISTICS OF TAILINGS SAND roadbed |
| CN108166403A (en) * | 2017-12-15 | 2018-06-15 | 东南大学 | A kind of transverse drainage of highway subgrade and strengthening reconstruction method |
| CN109403360A (en) * | 2018-12-13 | 2019-03-01 | 黑龙江省公路科学研究院 | It is a kind of to help the roadbed side slope freeze-thaw and sliding control method for melting integrate draining based on dot matrix |
| CN112195699A (en) * | 2020-09-15 | 2021-01-08 | 中电建十一局工程有限公司 | High-groundwater-level silty roadbed filling technology |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20150925 |
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