CN109235469A - A kind of Cut Slopes of Expansive Soil structure and its construction method - Google Patents
A kind of Cut Slopes of Expansive Soil structure and its construction method Download PDFInfo
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- CN109235469A CN109235469A CN201811250888.9A CN201811250888A CN109235469A CN 109235469 A CN109235469 A CN 109235469A CN 201811250888 A CN201811250888 A CN 201811250888A CN 109235469 A CN109235469 A CN 109235469A
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- 239000002689 soil Substances 0.000 title claims abstract description 110
- 238000010276 construction Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 24
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 24
- 239000004571 lime Substances 0.000 claims abstract description 24
- 239000004744 fabric Substances 0.000 claims abstract description 19
- 239000004746 geotextile Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000010410 layer Substances 0.000 claims description 104
- 238000005520 cutting process Methods 0.000 claims description 32
- 238000009412 basement excavation Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 16
- 244000025254 Cannabis sativa Species 0.000 claims description 11
- 239000002344 surface layer Substances 0.000 claims description 11
- 241000196324 Embryophyta Species 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 4
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 2
- 238000004162 soil erosion Methods 0.000 abstract description 4
- 230000003628 erosive effect Effects 0.000 abstract description 3
- 239000004568 cement Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003020 moisturizing effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 geonet Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0084—Geogrids
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2450/00—Gaskets
- E02D2450/10—Membranes
- E02D2450/105—Membranes impermeable
- E02D2450/106—Membranes impermeable for liquids
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The present invention relates to a kind of Cut Slopes of Expansive Soil structure and its construction methods, draining sewer, the rubble drainage blanket of bottom and the road surface structare layer of side including intercepting blind drain at the top of cut slope, interior outside is arranged in, the inside and outside draining sewer inside, cut slope ground and top are equipped with two cloth, one film water proof geotextiles sealing, it is circuited sequentially from bottom to top on the rubble drainage blanket and is laid with TGXG, expansion soil layer, white lime layer, it is equipped with planting soil on the outer slope of the cut slope, plants herbaceous plant in planting soil.Cut Slopes of Expansive Soil structure of the invention and its construction method make edge slope structure that can prevent slope erosion from avoiding soil erosion but also beautify slope surface environment, structure construction low cost, and the overall stability of side slope can be effectively ensured.
Description
Technical field
The present invention relates to highway engineering fields, more particularly to a kind of Cut Slopes of Expansive Soil structure and its construction method.
Background technique
In highway engineering in China, it is frequently encountered this geological condition of Cut Slopes of Expansive Soil, swelled ground has water suction
The characteristics of expansion, dehydration shrinkage, significant drying shrinkage bulking deformation will cause cut slope deformation, displacement, cracking and landslide.
Currently, the common Cut Slopes of Expansive Soil processing method in China has mortar rubble masonry pavement, retaining wall, antiskid
Stake, anchor pole method, root pile and cement lime stabilized soil stake method.Mortar rubble masonry pavement, retaining wall, friction pile, anchor pole method and
Sinking By The Method of Rooting provides skid resistance by the globality of raising side slope for side slope slopes to achieve the purpose that reinforcing side slope.Behavior of Hardened Cement Paste
On the one hand lime soil pile method, cement lime stabilized soil stake provide part skid resistance for side slope, the cement, lime in another aspect pile body are to swollen
Swollen soil plays improving effect, thus to reinforce cut slope.
But these traditional Cut Slopes of Expansive Soil processing methods, not only increase the excavation and digging soil of cut slope, band
Carry out serious soil erosion problem, causes side slope integrated environment inaccurate coordination, while construction cost is higher, and certain methods are such as
The stability of mortar rubble masonry pavement and anchor pole method slope treatment is poor.
Summary of the invention
The purpose of the present invention is causing the deformation of swelled ground drying shrinkage bulking for due to shallow-layer Moisture Damage, cause slope of highway sliding
It collapses phenomenon, proposes a kind of Cut Slopes of Expansive Soil structure and its construction method, to solve the Failure of Shallow of Cut Slopes of Expansive Soil,
Cut slope deformation, displacement and the landslide for preventing the deformation of swelled ground drying shrinkage bulking from causing.
To achieve the above object, the present invention provides a kind of Cut Slopes of Expansive Soil structures, including are arranged in cut slope
The internal drainage sewer and outer draining sewer in outside in the cut slope, the setting cutting is arranged in the intercepting blind drain at top
The rubble drainage blanket of side slope bottom, the road surface structare layer that the cut slope side is set, the intercepting blind drain, internal drainage
Rubble, the internal drainage sewer and outer draining sewer inside, cut slope ground and top are filled in sewer and outer draining sewer
It is equipped with two cloth, one film water proof geotextiles sealing, circuits sequentially the geotechnological lattice of laying on the rubble drainage blanket from bottom to top
Grid, expansion soil layer, white lime layer, expansion soil layer, the expansion soil layer inside are equipped with lateral rubble permeable layer, the cut slope
Outer slope on be equipped with planting soil, herbaceous plant is planted in the planting soil.
Preferably, the section width of the intercepting blind drain is 0.5m, is highly 1m；The internal drainage sewer and outer draining are seeped
The width of ditch is 0.5m, is highly 0.5m；The rubble drainage blanket with a thickness of 40cm, width 4m.
Preferably, the laying width of the TGXG be 3.5m, the lap width of adjacent two width TGXG be greater than or
Equal to 200mm；The width of the expansion soil layer is 3.8m, and outside is 30cm wider than TGXG, the expansion soil layer after grinding compacting
With a thickness of 20cm, compactness should be greater than or equal to the 93% of light-duty compacting criteria；The white lime layer with a thickness of 1cm；Institute
State lateral rubble permeable layer width be 0.5m, be layered laying with a thickness of 20cm.
Preferably, the road surface structare layer includes the sub-surface of bottom, the surface layer that the sub-surface top is arranged in
And the drain gutter in the surface layer is set.
Preferably, the drain gutter uses cast-in-place concrete structure, and width 0.4m is highly 0.5m, slope foot
The longitudinal slope of gutter is identical as road surface longitudinal slope.
Another object of the present invention is to provide a kind of construction methods of Cut Slopes of Expansive Soil structure, including walk as follows
It is rapid:
A, to highway engineering cutting excavation section smooth location, setting-out is measured, measuring goes out Middle Pile of Road, on cutting excavation
The stake of mouth sideline；
B, digging method is indulged using channel-type and carries out cutting earth excavation, until roadbed crest level, and set at the top of cut slope
Intercepting blind drain is set, rubble is filled in intercepting blind drain later, then will be flattened at the top of roadbed with land leveller, scrapes road camber and reserved pressure
Actual quantities rolls leveling；
C, earth excavation is carried out respectively in the backbreak interior outside of part of cut slope, construct respectively internal drainage sewer and outlet
Water sewer, the internal drainage sewer and outer draining sewer bottom longitudinal slope are identical as road surface longitudinal slope, later in the internal drainage sewer
With it is outer draining sewer on the inside of and side slope backbreak part ground be laid with two cloth, one film water proof geotextiles sealing, then in the interior row
Rubble is filled in water sewer and outer draining sewer；
D, backfill to form rubble drainage blanket in cut slope section bottom of backbreaking, and on rubble drainage blanket from lower and
On be successively laid with TGXG, expansion soil layer, expansion soil layer on the inside of backfill form lateral rubble permeable layer, later in swelled ground
Layer top is successively laid with white lime layer, expansion soil layer from bottom to top, and backfill forms lateral rubble infiltration on the inside of expansion soil layer
Layer；
E, the construction of step D medium stone drainage blanket above section is repeated, until after being backfilled at the top of cut slope, in cutting
It is laid with two cloth, one film water proof geotextiles sealing at the top of side slope, the processing of brush slope is carried out to cut slope later, is then spread in outer slope
If planting soil simultaneously protects outer slope grass planting；
F, successively road pavement base, surface layer and drain gutter are constructed,.
Preferably, the channel-type indulge digging method the step of include: initially along cutting longitudinally excavate a channel, then will lead to
Road is widened to two sides, and upper channel is widened to cut slope of backbreaking, and side slope ratio is 1:1.5, then excavates lower channel, is opened up
Width, up to stage excavation to roadbed crest level.
Preferably, roadbed is rolled leveling and is rolled using 12t or more vibrated roller, and straightway is from roadbed both sides in
Between promote, the horizontal curve section of superelevation promotes from the inside to the outside, and longitudinal advance and retreat formula carries out, and rolls until surface is without obvious wheelmark
Only, compactness meets design requirement.
Preferably, the laying width of the TGXG be 3.5m, the lap width of adjacent two width TGXG be greater than or
Equal to 200mm；The width of the expansion soil layer is 3.8m, and outside is 30cm wider than TGXG, the expansion soil layer after grinding compacting
With a thickness of 20cm, compactness should be greater than or equal to the 93% of light-duty compacting criteria；The white lime layer with a thickness of 1cm；Institute
The width for stating lateral rubble permeable layer is 0.5m, and layering is laid with a thickness of 20cm.
Preferably, it in the step E, carries out brushing away extra backfill 30cm thickness swelled ground on the outside of side slope when the processing of brush slope,
Grade of side slope is set as 1:1.5, is then laid with 30cm thickness planting soil in outer slope, and use hydraulic sprinkle to slope on planting soil
Face carries out grass planting.
Based on the above-mentioned technical proposal, the invention has the advantages that
Cut Slopes of Expansive Soil structure of the invention on the one hand due to the intensity and plastic deformation characteristic of TGXG, then plus
For upper white lime to the improving effect of swelled ground, the swelled ground for enabling the flexible support soil body to resist itself recycles work in Climate Dryness/Wetness
With the expansive force of lower generation, guarantee the local stability of swelled ground；On the other hand, the flexible support soil body be one by TGXG and
The entirety that white lime connects, along with its combined drainage system makes it can be steady in a long-term under Climate Dryness/Wetness ringing.
In addition, the flexible support soil body inhibits swelled ground significantly to deform from Beijing South Maxpower Technology Co. Ltd, shallow-layer side slope a part can be resisted
Sliding force, and combined drainage system is the flexible supporting structure soil body itself and bottom expansion soil base, rear portion expensive soil cutting
Moisturizing antiseepage provides best condition, and the overall stability of Cut Slopes of Expansive Soil is made to be guaranteed.
The existing supporting file of flexible supporting structure side slope, AsA -GSH cycle, and play the role of slope soil moisturizing antiseepage, it is effectively sharp
With swelled ground, while excavation and digging soil amount are reduced, prevent slope erosion, avoids that soil erosion occurs.It is anti-by the grass planting of slope surface
Shield, improves and has beautified slope surface environment, landscape along coordination.
For Cut Slopes of Expansive Soil structure of the invention compared with traditional approach, construction cost is lower, can be effectively prevented
Cut slope deformation, displacement and the landslide that the deformation of swelled ground drying shrinkage bulking causes, prevent the shallow-layer of Cut Slopes of Expansive Soil broken
It is bad.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is Cut Slopes of Expansive Soil structural schematic diagram；
Wherein, 1~intercepting blind drain；2~two cloth, one film water proof geotextiles sealing；3~lateral rubble permeable layer；4~ripe stone
Grieshoch；5~TGXG；6~expansion soil layer；7~rubble drainage blanket；8~internal drainage sewer；9~planting soil；10~outlet
Water sewer；11~sub-surface；12~drain gutter；13~surface layer.
Specific embodiment
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
The present invention provides a kind of Cut Slopes of Expansive Soil structures, as shown in Figure 1, it is excellent that one kind of the invention is shown
Select embodiment.The Cut Slopes of Expansive Soil structure includes following three modules:
Flexible support module: cut slope is backbreak 4m, grade of side slope 1:1.5, place Min layers TGXG 5, expansion soil layer
6, white lime 4, expansion soil layer 6, in this order, circulation is laid with, and grinding compacting forms flexible supporting structure；Drain module: including
The inside and outside draining sewer of top of the slope intercepting blind drain 1, the lateral permeable layer in flexible support back, rubble drainage blanket 7, cutting and drain
Gutter 12；Protection module: two cloth of top of the slope, one film water proof geotextiles sealing 2 and slope plants protective layer, wherein flexible supporting structure
In TGXG 5 geotextiles such as geonet, glass fiber grid also can be used.
Surface water drainage system: prevented by top of the slope intercepting blind drain 1, two cloth of top of the slope, one film water proof geotextiles sealing 2, slope surface grass planting
Shield and drain gutter 12 form.Wherein top of the slope intercepting blind drain 1 is used to surface water behind the row of cutting slope；Two cloth of top of the slope, one film water proof soil
Work cloth sealing 2 and slope surface grass planting protective layer carry out treatment on slope every infiltration；Drain gutter 12 is used to intercepting slope surface and road surface
Table water.
Ground water drainage system: by lateral rubble permeable layer 3, rubble drainage blanket 7, cutting internal drainage sewer 8 and outlet
Water sewer 10 forms.Wherein, lateral rubble permeable layer 3, cutting internal drainage sewer 8, for excluding flexible supporting structure behind
Slopes underground water；Rubble drainage blanket 7, lateral rubble permeable layer 3, cutting internal drainage sewer and outer draining sewer 10 are used to exclude
Flexible support slopes underground water；Sewer 10 is drained outside cutting be used to exclude to excavate roadbed permeate the ground water.
Cut Slopes of Expansive Soil structure of the present invention includes that intercepting blind drain 1 at the top of cut slope, setting is arranged in
The rubble of the internal drainage sewer 8 in outside and outer draining sewer 10, the setting cut slope bottom is arranged in the cut slope
Water subfill 7, the road surface structare layer that the cut slope side is set, the intercepting blind drain 1, internal drainage sewer 8 and outer draining
Rubble is filled in sewer 10, the internal drainage sewer 8 is equipped with outer 10 inside of draining sewer, cut slope ground and top
Two cloth, one film water proof geotextiles sealing 2 circuits sequentially on the rubble drainage blanket 7 from bottom to top and is laid with TGXG 5, expansion
Soil layer 6, white lime layer 4 expand soil layer 6, are equipped with lateral rubble permeable layer 3 on the inside of the expansion soil layer 6, the cut slope
It is equipped with planting soil 9 on outer slope, plants herbaceous plant in the planting soil 9.
Wherein, the section width of the intercepting blind drain 1 is 0.5m, is highly 1m, fills rubble in ditch；The internal drainage seeps
The width of ditch 8 and outer draining sewer 10 is 0.5m, is highly 0.5m, and drain sewer channel bottom longitudinal slope and keep with road surface longitudinal slope
Unanimously；The rubble drainage blanket 7 with a thickness of 40cm, width 4m, two layers, every layer of 20cm of blotter point, practice of construction
Want layered rolling closely knit.
Preferably, the laying width of the TGXG 5 be 3.5m, the lap width of adjacent two width TGXG be greater than or
Equal to 200mm, first layer swelled ground is backfilled at the top of TGXG 5；The width of the expansion soil layer 6 is 3.8m, and outside is than soil
6 width 30cm of work grid, expansion soil layer 6 after grinding compacting with a thickness of 20cm, compactness should be greater than or be equal to light-duty compacting mark
Quasi- 93%；The white lime layer 4 with a thickness of 1cm, be layered at the top of first layer backfill swelled ground；The lateral rubble permeable layer
3 width is 0.5m, and with a thickness of 20cm, and the lateral rubble permeable layer backfills first layer rubble on the inside of swelled ground；Foundation
Above-mentioned setting sequence circulation backfill, until being backfilling into road pad side slope top.
Further, it is preferable that the road surface structare layer includes the sub-surface 11 of bottom, is arranged in the sub-surface 11
The surface layer 13 on top and the drain gutter 12 being arranged in the surface layer 13.
Preferably, the drain gutter 12 uses cast-in-place concrete structure, and width 0.4m is highly 0.5m, slope
The longitudinal slope of foot gutter 12 is identical as road surface longitudinal slope.
Cut Slopes of Expansive Soil structure of the invention on the one hand due to the intensity and plastic deformation characteristic of TGXG 5, then
In addition improving effect of the white lime 4 to swelled ground, the swelled ground for enabling the flexible support soil body to resist itself is followed in Climate Dryness/Wetness
The lower expansive force generated of ring effect, guarantees the local stability of swelled ground；On the other hand, the flexible support soil body is one by geotechnological lattice
The entirety that grid 5 and white lime 4 connect, along with its combined drainage system makes it can be long-term under Climate Dryness/Wetness ringing
Stablize.
In addition, the flexible support soil body inhibits swelled ground significantly to deform from Beijing South Maxpower Technology Co. Ltd, shallow-layer side slope a part can be resisted
Sliding force, and combined drainage system is the flexible supporting structure soil body itself and bottom expansion soil base, rear portion expensive soil cutting
Moisturizing antiseepage provides best condition, and the overall stability of Cut Slopes of Expansive Soil is made to be guaranteed.
The existing supporting file of flexible supporting structure side slope, AsA -GSH cycle, and play the role of slope soil moisturizing antiseepage, it is effectively sharp
With swelled ground, while excavation and digging soil amount are reduced, prevent slope erosion, avoids that soil erosion occurs.It is anti-by the grass planting of slope surface
Shield, improves and has beautified slope surface environment, landscape along coordination.
The present invention also provides a kind of construction method of Cut Slopes of Expansive Soil structure, the construction method includes following step
It is rapid:
A, to highway engineering cutting excavation section smooth location, setting-out is measured, measuring goes out Middle Pile of Road, on cutting excavation
The stake of mouth sideline；
B, digging method is indulged using channel-type and carries out cutting earth excavation, until roadbed crest level, and set at the top of cut slope
Intercepting blind drain 1 is set, rubble is filled in intercepting blind drain 1 later, then will be flattened at the top of roadbed with land leveller, scrapes road camber and reserve
Amount of compaction rolls leveling；
C, earth excavation is carried out respectively in the backbreak interior outside of part of cut slope, the internal drainage sewer 8 and outer of constructing respectively
Sewer 10 is drained, the internal drainage sewer 8 and outer 10 bottom longitudinal slope of draining sewer are identical as road surface longitudinal slope, later in the interior row
The backbreak ground of part of water sewer 8 and outer draining sewer 10 inside and side slope is laid with two cloth, one film water proof geotextiles sealing 9, then
Rubble is filled in the internal drainage sewer 8 and outer draining sewer 10；
D, it backfills to form rubble drainage blanket 7 in cut slope section bottom of backbreaking, and on rubble drainage blanket 7 under
TGXG 5, expansion soil layer 6 are successively laid on and, backfill forms lateral rubble permeable layer 3, Zhi Hou on the inside of expansion soil layer 6
It expands 6 top of soil layer and is successively laid with white lime layer 4, expansion soil layer 6 from bottom to top, and backfill forms side on the inside of expansion soil layer 6
To rubble permeable layer 3；
E, the construction of step D medium stone drainage blanket above section is repeated, until after being backfilled at the top of cut slope, in cutting
It is laid with two cloth, one film water proof geotextiles sealing 2 at the top of side slope, the processing of brush slope is carried out to cut slope later, is then spread in outer slope
If planting soil 9 simultaneously protects outer slope grass planting；
F, successively road pavement base 11, surface layer 13 and drain gutter 12 are constructed.
Above-mentioned construction step is described as follows:
Preparation of construction.First to highway engineering cutting excavation section smooth location, setting-out is measured, measuring goes out in route
Stake, the stake of cutting excavation sideline suitable for reading pay attention to considering when putting sideline stake that cut slope is backbreak 4m or so by designing side slope, and stake position is put
Mono- section of sample straightway 100m, mono- section of curved section 50m.
Cutting earth excavation.Cutting earth excavation is excavated using excavator, dump truck muck haulage, and cutting is backbreak part
The earthwork considers that Slope Treatment will also utilize, and it is spare to be transported to interim spoil ground.Digging mode indulges digging method using channel-type, initially along
Cutting longitudinally excavates a channel, then widens in channel to two sides, and upper channel is widened to cut slope of backbreaking, and side slope ratio is 1:
1.5, then lower channel is excavated, it is widened, up to stage excavation to roadbed crest level.
In digging process, pay attention to that rectangle intercepting blind drain 1 is arranged on cut slope top, intercepting blind drain 1 uses weeper drain
Form, intercepting ditch cross dimensions are 0.5 × 1m (wide × high), fill rubble in ditch, intercepting blind drain 1, which cuts and cover, builds rubble.
Roadbed rolls.It after cutting excavation to roadbed top design altitude, is flattened with land leveller, scrapes road camber, and reserved compacting
Amount, roadbed is rolled to be rolled using 12t or more vibrated roller, and straightway is promoted from roadbed both sides to centre, there is superelevation
Horizontal curve section promotes from the inside to the outside, and longitudinal advance and retreat formula carries out, and rolls until surface is without obvious wheelmark, and compactness meets
Design Requirement Drawing.
The inside and outside draining sewer construction of cutting.Roadbed, which rolls, to be finished, and cut slope backbreaks on the outside of in partially and carries out the earthwork respectively
Excavate, construct internal drainage sewer 8 and outer draining sewer 10, internal drainage sewer 8 and outer 10 sectional dimension of draining sewer for 0.5 ×
0.5m (wide × high), channel bottom longitudinal slope is consistent with road surface longitudinal slope, and channel excavation finishes, and side and side slope are backbreak in the trench
Part ground is laid with two cloth, one film water proof geotextiles sealing 2, and the laying of two cloth, one film water proof geotextiles sealing 2 is finished, then seeped
Rubble is filled in ditch.
Bottom discharge cushion construction.Cut slope backbreak section bottom backfill 40cm rubble drainage blanket 7, rubble draining pad
7 width of layer are 4m, and rubble drainage blanket 7, which divides two layers, constructs, every layer of 20cm, and layered rolling is closely knit.
Cut slope expands earthen backfill and the construction of lateral permeable layer.
1., at the top of rubble drainage blanket 7 be laid with first layer TGXG 5, TGXG 5 be laid with width be 3.5m, phase
The lap width of adjacent two width TGXG 5 is not less than 200mm, and connection should securely, and the bonding strength of Impact direction is not less than material
Design tensile strength.First layer swelled ground is backfilled at the top of TGXG 5, swelled ground virtual resurfacing thickness 30cm is swollen in order to guarantee
Swollen 6 outer ledge compactness of soil layer, backfill width are 3.8m, and outside is 30cm wider than TGXG 5, is carried out using vibrated roller
It rolls, grinding compacting should be not less than the 93% of light-duty compacting criteria with a thickness of 20cm, compactness.
2., laterally rubble permeable layer 3 construct, expansion soil layer 6 on the inside of backfill first layer rubble, rubble width be 0.5m,
Rubble is with a thickness of 20cm.
3., at the first backfill expansion soil layer 6 top, spread 1cm thickness white lime layer 4, lime making width is 3.5m, is then returned
Second layer swelled ground, swelled ground virtual resurfacing thickness 30cm are filled out, backfill width is 3.8m, and outside is 30cm wider than being laid with lime, using vibration
Dynamic road roller is rolled, and grinding compacting should be not less than the 93% of light-duty compacting criteria with a thickness of 20cm, compactness.
4., laterally rubble permeable layer 3 is constructed, backfill second layer rubble on the inside of the second expansion soil layer 6, rubble width is
0.5m, rubble is with a thickness of 20cm.
5., repetitive cycling it is above-mentioned 1., 2., 3., 4. step, until being backfilled to cut slope top.
Construction of waterproof layer at the top of cutting.After swelled ground is backfilling at the top of cut slope, two cloth, one film water proof is laid at top
Geotextiles sealing 2.
The protection of cut slope grass planting.Top construction of waterproof layer finishes, and handles Cut Slopes of Expansive Soil brush slope, brushes away side slope
Then the extra backfill 30cm thickness swelled ground in outside, grade of side slope 1:1.5 are laid with 30cm thickness planting soil in outer slope, using liquid
Pressure spray seeding technique protects slope surface green grass, is washed away with reducing rainwater to slope surface.
Road surface structare layer construction.Cut Slopes of Expansive Soil is disposed, starts to carry out sub-surface 11, surface layer 13 and slope
Foot gutter 12 is constructed, and drain gutter 12 uses cast-in-place concrete structure, sectional dimension be 0.4 × 0.5m (it is wide ×
It is high), bottom of trench longitudinal slope is consistent with road surface longitudinal slope.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (10)
1. a kind of Cut Slopes of Expansive Soil structure, it is characterised in that: including be arranged in intercepting blind drain (1) at the top of cut slope,
The internal drainage sewer (8) in outside and outer draining sewer (10), the setting cut slope bottom in the cut slope are set
Rubble drainage blanket (7), the road surface structare layer of the cut slope side is set, the intercepting blind drain (1), internal drainage seep
Rubble, the internal drainage sewer (8) and outer draining sewer (10) inside, cutting side are filled in ditch (8) and outer draining sewer (10)
Hillside fields face and top are equipped with two cloth, one film water proof geotextiles sealing (2), on the rubble drainage blanket (7) from bottom to top according to
Secondary circulation is laid with TGXG (5), expansion soil layer (6), white lime layer (4), expansion soil layer (6), expansion soil layer (6) inside
It equipped with lateral rubble permeable layer (3), is equipped with planting soil (9) on the outer slope of the cut slope, interior kind of the planting soil (9)
Plant herbaceous plant.
2. Cut Slopes of Expansive Soil structure according to claim 1, it is characterised in that: the section of the intercepting blind drain (1)
Width is 0.5m, is highly 1m；The width of the internal drainage sewer (8) and outer draining sewer (10) is 0.5m, is highly 0.5m；
The rubble drainage blanket (7) with a thickness of 40cm, width 4m.
3. Cut Slopes of Expansive Soil structure according to claim 1, it is characterised in that: the laying of the TGXG (5)
Width is 3.5m, and the lap width of adjacent two width TGXG is greater than or equal to 200mm；It is described expansion soil layer (6) width be
3.8m, outside than TGXG (6) width 30cm, expansion soil layer (6) after grinding compacting with a thickness of 20cm, compactness should be greater than
Or equal to the 93% of light-duty compacting criteria；The white lime layer (4) with a thickness of 1cm；The width of the lateral rubble permeable layer (3)
Degree is 0.5m, and layering is laid with a thickness of 20cm.
4. Cut Slopes of Expansive Soil structure according to claim 1, it is characterised in that: the road surface structare layer includes bottom
Sub-surface (11), setting the sub-surface (11) top surface layer (13) and be arranged in the surface layer (13)
Drain gutter (12).
5. Cut Slopes of Expansive Soil structure according to claim 4, it is characterised in that: the drain gutter (12) is adopted
With cast-in-place concrete structure, width 0.4m is highly 0.5m, and the longitudinal slope of drain gutter (12) is identical as road surface longitudinal slope.
6. a kind of construction method of Cut Slopes of Expansive Soil structure, characterized by the following steps:
A, to highway engineering cutting excavation section smooth location, setting-out is measured, measuring goes out Middle Pile of Road, cutting excavation upper brim
Line stake；
B, digging method is indulged using channel-type and carries out cutting earth excavation, until roadbed crest level, and setting is cut at the top of cut slope
Water french drain (1) fills rubble in intercepting blind drain (1) later, then will be flattened at the top of roadbed with land leveller, scrapes road camber and reserves
Amount of compaction rolls leveling；
C, earth excavation is carried out respectively in the backbreak interior outside of part of cut slope, construct respectively internal drainage sewer (8) and outlet
Water sewer (10), the internal drainage sewer (8) and outer draining sewer (10) bottom longitudinal slope are identical as road surface longitudinal slope, later described
Internal drainage sewer (8) and it is outer draining sewer (10) on the inside of and side slope backbreak part ground be laid with two cloth, one film water proof geotechnique's fabric width
Layer (2) then fills rubble in the internal drainage sewer (8) and outer draining sewer (10)；
D, it backfills and to be formed rubble drainage blanket (7) in cut slope section bottom of backbreaking, and on rubble drainage blanket (7) under
And upper laying is successively laid with TGXG (5), expansion soil layer (6), backfill forms lateral rubble infiltration on the inside of expansion soil layer (6)
Layer (3) is successively laid with white lime layer (4), expansion soil layer (6) on expansion soil layer (6) top later from bottom to top, and in swelled ground
Backfill forms lateral rubble permeable layer (3) on the inside of layer (6)；
E, the construction of step D medium stone drainage blanket above section is repeated, until after being backfilled at the top of cut slope, in cut slope
Top is laid with two cloth, one film water proof geotextiles sealing (2), carries out the processing of brush slope to cut slope later, is then laid in outer slope
Planting soil (9) simultaneously protects outer slope grass planting；
F, successively road pavement base (11), surface layer (13) and drain gutter (12) are constructed.
7. construction method according to claim 6, it is characterised in that: the channel-type indulge digging method the step of include: start
When along cutting longitudinally excavate a channel, then channel is widened to two sides, upper channel is widened to cut slope of backbreaking, side slope ratio
For 1:1.5, then lower channel is excavated, widened, until stage excavation is to roadbed crest level.
8. construction method according to claim 6, it is characterised in that: roadbed rolls leveling using 12t or more vibration pressure road
Machine is rolled, and straightway is promoted from roadbed both sides to centre, and the horizontal curve section of superelevation promotes from the inside to the outside, longitudinal to retreat
Formula carries out, and rolls until surface is without obvious wheelmark, compactness meets design requirement.
9. construction method according to claim 6, it is characterised in that: the laying width of the TGXG (5) is 3.5m,
The lap width of adjacent two width TGXG is greater than or equal to 200mm；The width of expansion soil layer (6) is 3.8m, outside ratio
TGXG (5) width 30cm, expansion soil layer (6) after grinding compacting with a thickness of 20cm, compactness should be greater than or be equal to light-duty
The 93% of compacting criteria；The white lime layer (4) with a thickness of 1cm；The width of the lateral rubble permeable layer (3) is 0.5m,
Layering is laid with a thickness of 20cm.
10. construction method according to claim 6, it is characterised in that: in the step E, carry out brush when the processing of brush slope
It goes extra backfill 30cm thickness swelled ground, grade of side slope on the outside of side slope to be set as 1:1.5, is then laid with the plantation of 30cm thickness in outer slope
Native (9), and grass planting is carried out to slope surface using hydraulic sprinkle on planting soil (9).
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