CN208472741U - Deep earthen fill zone gravity type and reinforced earth bulkhead combined support structure - Google Patents
Deep earthen fill zone gravity type and reinforced earth bulkhead combined support structure Download PDFInfo
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- CN208472741U CN208472741U CN201821104595.5U CN201821104595U CN208472741U CN 208472741 U CN208472741 U CN 208472741U CN 201821104595 U CN201821104595 U CN 201821104595U CN 208472741 U CN208472741 U CN 208472741U
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Abstract
The utility model discloses a kind of deep earthen fill zone gravity type and reinforced earth bulkhead combined support structure, including sand-gravel cushion, gravity retaining wall and reinforced earth bulkhead；In below ground, gravity retaining wall is arranged on sand-gravel cushion for the sand-gravel cushion setting；Reinforced earth bulkhead is arranged on gravity retaining wall, reinforced earth bulkhead is multi-stage stairs formula structure, Wide Worktable is set between two-stage reinforced earth bulkhead unit, basis is provided on Wide Worktable, on the basis of higher level's reinforced earth bulkhead unit is arranged at the top of junior's reinforced earth bulkhead unit, most junior's reinforced earth bulkhead unit is arranged at the top of gravity retaining wall；The earthwork is backfilled on the inside of reinforced earth bulkhead.Structure construction convenience, low cost, while can get good project benefit, environmental benefit and economic benefit.
Description
Technical field
The utility model belongs to Geotechnical Engineering field, is related to Reinforcement Works of Rock Slopes design, and in particular to a kind of deep
Earthen fill zone gravity type and reinforced earth bulkhead combined support structure.
Background technique
With the anxiety of national land used situation, a batch power engineering items selection such as more and more power plants and electric substation
It is built in the biggish Mountain area of topographical elevation difference.Due to the leveling of engineering ground and the needs of horizontal layout, the big digging of height is formed
Fang Bianpo and the deep embankment side slope to be formed of banketing must carry out Treatment design, while reach safe and applicable, economical rationality and beauty
Change the purpose of environment.
Mountain area large area, the embankment engineering of big thickness, backfill rolling effect is often poor, and uniformity is poor, integral strength
Low, engineering property difference is very big.On the one hand it may cause the compressive deformation of backfill region native soil layer, generate sedimentation, on the other hand
It may cause the embankment soil body if the quality of artificial backfill is not executed by design requirement strictly and sedimentation and differential settlement occur,
And it is difficult to complete infall process for a long time.It is not only difficult to ensure embankment if do not selected suitable slope ratio to be backfilled during embankment
Also often there is the tension fracture penetrated through in backfilling process in the stabilization of side slope；When embankment side slope top of the slope, slope foot are disposed with building
When object, safe operation of the side slope after deformation instability will seriously affect engineering construction and engineering is built up.
Deep welding with filler wire difficulty of governance is big, as slope foot has the coombe of natural drainage, the plane that top of the slope has building to arrange
Narrow space engineering ground, it is necessary to take special design that can meet requirement of engineering.Using retaining wall there are supporting and retaining system height not
Height, and it is higher to requirement for bearing capacity after supporting and retaining system height reach a certain height, therefore, retaining wall makes generally as slope foot toe wall
With；For stabilizing piles, general cantilever friction pile cantilever segment height is such as considered as anchor cable antiskid no more than 15m
Pilework then there is a problem of basement rock apart from stake top apart from excessive and cause anchorage depth excessive, in addition, stabilizing piles are general
For its project amount is big, cost is high；For anchoring engineering, embankment area filled slope is big, buried depth of bedrock is big, and anchoring effect has
Limit.
Utility model content
To solve the above-mentioned problems, the utility model provides a kind of deep earthen fill zone gravity type and combines branch with reinforced earth bulkhead
Protection structure, structure construction convenience, low cost, while can get good project benefit, environmental benefit and economic benefit.
In order to achieve the above objectives, the technical solution adopted in the utility model are as follows:
A kind of deep earthen fill zone gravity type and reinforced earth bulkhead combined support structure, including sand-gravel cushion, gravity type are kept off
Cob wall and reinforced earth bulkhead；In below ground, gravity retaining wall is arranged in sand-gravel cushion for the sand-gravel cushion setting
On, the inside top of gravity retaining wall is horizontally disposed plain concrete cushion layer and cushion lime, and plain concrete cushion layer setting exists
On cushion lime；Reinforced earth bulkhead is arranged on gravity retaining wall and plain concrete cushion layer；Reinforced earth bulkhead is multi-stage stairs
Formula structure, including multiple reinforced earth bulkhead units are provided with basis, Shang Jijia on the platform between two-stage reinforced earth bulkhead unit
On the basis of muscle soil retaining wall units are arranged at the top of junior's reinforced earth bulkhead unit, the setting of most junior's reinforced earth bulkhead unit is in weight
At the top of power formula retaining wall.
Preferably, the reinforced earth bulkhead unit is rising structure, and hanging plate, wall is arranged in the slope surface of reinforced earth bulkhead unit
Interior setting bar strip simultaneously backfills the earthwork.
Preferably, the lacing wire uses CAT steel and plastic composite material, and the vertical node spacing of bar strip is 0.4m, horizontal direction
Node spacing is 0.5m；Single bar strip laying length be 12m~28m, cross dimensions be 30mm × 2mm, tensile fracture >=
9kN, tensile strength >=4kN, elongation at break≤3%.
Preferably, the earthwork is placement in layers compacting, and the maximum virtual resurfacing thickness of layering is no more than 30cm, compacting factor
Not less than 0.95.
Preferably, cap stone is provided at the top of the hanging plate of every grade of reinforced earth bulkhead unit.
Preferably, the basis be L-type structure, hanging plate setting on the basis of.
Preferably, the gravity retaining wall is equipped with multiple drain holes；The outside ratio of slope of drain hole is 1:10, multiple drain holes
At quincuncial arrangement, pvc pipe is provided in the hole of drain hole, pvc pipe insertion end steel wire lashing filament spunbond needle thorn is non-to be knitted
Make geotextiles.
Preferably, tenon is arranged in the gravity retaining wall bottom, and the blind mortise at the top of tenon and sand-gravel cushion cooperates
Connection.
Preferably, the front ratio of slope of the gravity retaining wall is 1: 0.25, and back side ratio of slope is 1: 0.35；Gravity type gear
The cob wall back side is filled out using cobble sand or cobble rammer.
Preferably, the gravity retaining wall uses slabstone concrete structure.
Compared with the existing technology, the utility model has the advantage that
The deep earthen fill zone gravity type and reinforced earth bulkhead combined support structure of the utility model, using sand-gravel cushion method
Basement process is carried out, sand-gravel cushion method basement process, which meets gravity type, wants foundation bearing capacity with reinforced earth bulkhead load
It asks；The gravity retaining wall of special designing is set on sand-gravel cushion, and gravity retaining wall meets the biggish reinforcement of upper height
Native retaining wall load requirement；Multistage reinforced earth bulkhead is set above Gravity Retaining Wall, backfills the earthwork on the inside of multistage reinforced earth bulkhead,
Ensure effectively to solve the coombe that slope foot has natural drainage, the narrow land occupation problem of the plane space that top of the slope has building to arrange；It adopts
With the structure construction of the utility model is convenient, low cost, project benefit, environmental benefit and good in economic efficiency.
Further, reinforced earth retaining wall panel pattern uses plate-hanging type, and lacing wire material is deformed after high, stress using intensity
The CAT steel and plastic composite material bar strip small, corrosion resistance is good can generate enough frictional force with banketing.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model deep earthen fill zone gravity type and reinforced earth bulkhead combined support structure.
Fig. 2 is the enlarged diagram on basis 7 in Fig. 1.
In figure: 1 is sand-gravel cushion, and 2 be gravity retaining wall, and 3 be reinforced earth retaining wall, and 4 be drain hole, and 5 be dirt
Bed course, 6 be cap stone, based on 7.
Specific embodiment
The feature of the utility model and other correlated characteristics are made further specifically by embodiment below in conjunction with attached drawing
It is bright, in order to the understanding of technical staff of the same trade.
As depicted in figs. 1 and 2, a kind of deep earthen fill zone gravity type of the utility model and reinforced earth bulkhead combination supporting knot
Structure, including 3m thickness sand-gravel cushion 1, height 10.8m gravity retaining wall 2 and total height 20m multistage reinforced earth bulkhead 3.Gravel
Gravity retaining wall 2 is set on stone bed course 1, three-level reinforced earth bulkhead 3 is set on gravity retaining wall 2, gravity retaining wall 2 is set
There are multiple drain holes 4,3 bottom of reinforced earth bulkhead is 2 wall top of gravity retaining wall or basis 7, plain concrete cushion layer and dirt pad
Cap stone 6 is arranged in layer 5, every grade of reinforced earth bulkhead top.
Specifically, sand-gravel cushion method carries out basement process, it is reasonable that sand gravel material selection should reach gradation, fine particle content (<
5mm granule content) it controls 25%~35%.1 single layer virtual resurfacing thickness 40cm of sand-gravel cushion, water content are controlled 3%~6%
Between.In construction, first flat stone roller (not vibrating), which rolls 1 time, makes surfacing, then vibroroller cmpacting 6 times.Compacting factor >=0.97, ground
Base bearing capacity >=450kPa.
The gravity retaining wall of special designing is height 10.8m slabstone concrete retaining wall, including above ground portion and underground
Tenon is arranged in part, bottom.The ratio of slope of metope is 1: 0.25, and the ratio of slope of wall back is 1: 0.35.
Strength grade of concrete C15, slabstone doping level should not exceed the 18% of total volume, slabstone need to select it is fresh, be not easy
Weathering, strength grade are not less than the rock of 30MPa, and coefficient of softing is greater than 0.75.
Gravity Retaining Wall is equipped with multiple drain holes, and wall back is filled out using cobble sand, cobble rammer.
Reinforced earth bulkhead be it is upright, the height of every grade of reinforced earth bulkhead unit is less than or equal to 8m, is arranged between two-stage unit
3.5m~4.0m Wide Worktable, most upper level reinforced earth retaining wall cell height are adjusted according to embankment slope height.Reinforced earth
C30 armored concrete hanging plate is arranged in retaining wall slope surface.The lacing wire material of reinforced earth bulkhead deforms small energy after high, stress using intensity
The good CAT steel and plastic composite material bar strip of enough frictional force, corrosion resistance is generated with banketing.Every grade of reinforced earth bulkhead unit top
Cap stone is arranged in portion, and bottom setting basis is all made of C20 concrete cast-in-situ and forms.
The vertical node spacing of bar strip is 0.4m, horizontal direction node spacing is 0.5m, is determined according to stable calculation single
Laying length 12m~28m, cross dimensions are 30mm × 2mm, and tensile fracture >=9kN allows tensile strength >=4kN, extension at break
Rate≤3%.
Reinforced earth retaining wall bottom is C15 concrete retaining wall wall top and 10cm thickness C10 plain concrete cushion layer, and C10 element is mixed
1.5m thickness 2:8 cushion lime is set under solidifying soil padding.
As shown in Fig. 2, basis 7 is made of C20 concrete cast-in-situ, section is L-type structure.
Embodiment
As depicted in figs. 1 and 2, certain engineering embankment side slope backfills thickness 28m, and top of the slope has building arrangement, and slope foot is long-term
The natural coombe of flowing water, stratum are silty clay, characteristic value of foundation bearing capacity 290kPa.
1 basement process of sand-gravel cushion is with a thickness of 3m, width 14.3m, and it is reasonable that sand gravel material selection should reach gradation, carefully
Grain content control is 25%~35%.Sand-gravel cushion single layer virtual resurfacing thickness 40cm, water content control between 3%~6%.It applies
In work, first puts down and roll 1 time and make surfacing, then vibroroller cmpacting 6 times.Compacting factor >=0.97, foundation bearing capacity >=
450kPa。
Gravity retaining wall 2 be height 10.8m slabstone concrete retaining wall, including below ground part 2.5m and ground with
The tenon having a size of high 1.2m He width 5m is arranged in upper 8.3m, bottom；The ratio of slope of metope is 1: 0.25, and the ratio of slope of wall back is 1:
0.35；Strength grade of concrete C15, slabstone doping level should not exceed the 18% of total volume, slabstone need to select it is fresh, be not easy wind
Change, rock of the strength grade not less than 30MPa, coefficient of softing is greater than 0.75；Gravity Retaining Wall is equipped with multiple drain holes, sluices
The outside ratio of slope 1:10 in hole, spacing 2m, quincuncial arrangement, drain hole aperture 120mm, setting diameter 110mmPVC is managed in hole, pvc pipe
It is inserted into the filament spunbond needling non-woven geotextiles of end steel wire lashing 300g/m；Wall back is filled out using cobble sand, cobble rammer.
Reinforced earth bulkhead 3 be it is upright, total height 20m, a point three-level is arranged, below the high 8m of two-stage reinforced earth retaining wall, above
3.5m and 4.0m Wide Worktable is respectively set between two-stage in the height 4m of level-one reinforced earth bulkhead；The setting of reinforced earth retaining wall slope surface
500mm thickness sand gravel loaded filter is arranged after panel for C30 armored concrete hanging plate, and partial size is no more than 40mm and gradation is uniform, institute
It selects sand gravel to answer psephicity good, the rubble containing sharp concave corners must not be selected；Lacing wire material is deformed small using intensity after high, stress
The good CAT steel and plastic composite material bar strip of enough frictional force, corrosion resistance can be generated with banketing；The vertical node spacing of bar strip
It is 0.5m for 0.4m, horizontal direction node spacing, single laying length is determined as 12m~28m, cross dimensions according to stable calculation
For 30mm × 2mm, tensile fracture >=9kN allows tensile strength >=4kN, elongation at break≤3%；Backfilling of earthwork is that layering is filled out
Compacting is built, controls its water content within optimum moisture content ± 2%, the maximum virtual resurfacing thickness of layering is no more than 30cm, compacting system
Number cannot be less than 0.95；Reinforced earth retaining wall bottom be C15 concrete retaining wall wall top and 10cm thickness C10 plain concrete cushion layer,
1.5m thickness 2:8 cushion lime 5 is set under C10 plain concrete cushion layer；Cap stone is set at the top of every grade of reinforced earth bulkhead, having a size of thickness
30cm, width 100cm, bottom setting basis 7, are all made of C20 concrete cast-in-situ and form.
For the structure of embodiment 1, following stable calculation is carried out:
Stable calculation, its resistant slide of single-stage reinforced earth retaining wall peace are carried out by gravity retaining wall to reinforced earth retaining wall
Overall coefficient is 1.32~2.45, considers that slight slope occurs from its safety coefficient of the whole slide of reinforced earth retaining wall lower part to be 1.34,
It is all satisfied the code requirement not less than 1.3.To gravity retaining wall carry out sliding stability checking computations, skid force 1360.55kN,
Skid resistance is 2166.84kN, and resistant slide safety coefficient is 1.59, meets the code requirement not less than 1.3；Tilting moment is
15963.7kN.m, resistance to tipping moment 32951.6kN.m, anti-coccidia index 2.1 meet code requirement.To gravity type
Overall stability checking computations are carried out with reinforced earth bulkhead combined support structure, total sliding force is 2858.5kN, and total skid resistance is
3861.5kN, coefficient of global stabilization 1.35 meet the code requirement not less than 1.3.
Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects
Step is described in detail, it should be understood that being not limited to this foregoing is merely specific embodiment of the utility model
Utility model, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all wrap
Containing being within the protection scope of the utility model.
Claims (10)
1. a kind of deep earthen fill zone gravity type and reinforced earth bulkhead combined support structure, which is characterized in that including sand-gravel cushion
(1), gravity retaining wall (2) and reinforced earth bulkhead (3)；Sand-gravel cushion (1) setting is in below ground, gravity type gear
Cob wall (2) is arranged on sand-gravel cushion (1), and the inside top of gravity retaining wall (2) is horizontally disposed plain concrete cushion layer
And cushion lime (5), plain concrete cushion layer are arranged on cushion lime (5)；Reinforced earth bulkhead (3) is arranged in gravity retaining wall
(2) and in plain concrete cushion layer；Reinforced earth bulkhead (3) is multi-stage stairs formula structure, including multiple reinforced earth bulkhead units, two-stage
It is provided on platform between reinforced earth bulkhead unit basic (7), the setting of higher level's reinforced earth bulkhead unit is kept off in junior's reinforced earth
On basis (7) at the top of wall unit, the setting of most junior's reinforced earth bulkhead unit is at the top of gravity retaining wall (2).
2. a kind of deep earthen fill zone gravity type as described in claim 1 and reinforced earth bulkhead combined support structure, feature exist
In the reinforced earth bulkhead unit is rising structure, and the slope surface of reinforced earth bulkhead unit is arranged hanging plate, bar strip is arranged within the walls
And backfill the earthwork.
3. a kind of deep earthen fill zone gravity type as claimed in claim 2 and reinforced earth bulkhead combined support structure, feature exist
In the lacing wire uses CAT steel and plastic composite material, and the vertical node spacing of bar strip is 0.4m, horizontal direction node spacing is
0.5m；Single bar strip laying length is 12m~28m, and cross dimensions is 30mm × 2mm, tensile fracture >=9kN, tensile strength
>=4kN, elongation at break≤3%.
4. a kind of deep earthen fill zone gravity type as claimed in claim 2 and reinforced earth bulkhead combined support structure, feature exist
In the earthwork is placement in layers compacting, and the maximum virtual resurfacing thickness of layering is no more than 30cm, and compacting factor is not less than 0.95.
5. a kind of deep earthen fill zone gravity type as claimed in claim 2 and reinforced earth bulkhead combined support structure, feature exist
In the hanging plate top of every grade of reinforced earth bulkhead unit is provided with cap stone (6).
6. a kind of deep earthen fill zone gravity type as claimed in claim 2 and reinforced earth bulkhead combined support structure, feature exist
In the basis (7) are L-type structure, and hanging plate setting is on basic (7).
7. a kind of deep earthen fill zone gravity type as described in claim 1 and reinforced earth bulkhead combined support structure, feature exist
In the gravity retaining wall (2) is equipped with multiple drain holes (4)；Ratio of slope is 1:10, multiple drain holes (4) to drain hole (4) outward
At quincuncial arrangement, pvc pipe is provided in the hole of drain hole (4), it is non-with steel wire lashing filament spunbond needle thorn that pvc pipe is inserted into end
Weave geotextiles.
8. a kind of deep earthen fill zone gravity type as described in claim 1 and reinforced earth bulkhead combined support structure, feature exist
In tenon is arranged in the gravity retaining wall (2) bottom, and the blind mortise at the top of tenon and sand-gravel cushion (1) is cooperatively connected.
9. a kind of deep earthen fill zone gravity type as described in claim 1 and reinforced earth bulkhead combined support structure, feature exist
In the front ratio of slope of the gravity retaining wall (2) is 1: 0.25, and back side ratio of slope is 1: 0.35；Gravity retaining wall (2) back
Face is filled out using cobble sand or cobble rammer.
10. a kind of deep earthen fill zone gravity type as described in claim 1 and reinforced earth bulkhead combined support structure, feature exist
In the gravity retaining wall (2) uses slabstone concrete structure.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108570994A (en) * | 2018-07-12 | 2018-09-25 | 中国电力工程顾问集团西北电力设计院有限公司 | Deep earthen fill zone gravity type and reinforced earth bulkhead combined support structure |
| CN111119229A (en) * | 2019-11-01 | 2020-05-08 | 中铁二院工程集团有限责任公司 | Multi-stage reinforced retaining wall comprehensive protection system suitable for large-scale waste slag yard and stability checking and calculating method and construction method thereof |
-
2018
- 2018-07-12 CN CN201821104595.5U patent/CN208472741U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108570994A (en) * | 2018-07-12 | 2018-09-25 | 中国电力工程顾问集团西北电力设计院有限公司 | Deep earthen fill zone gravity type and reinforced earth bulkhead combined support structure |
| CN111119229A (en) * | 2019-11-01 | 2020-05-08 | 中铁二院工程集团有限责任公司 | Multi-stage reinforced retaining wall comprehensive protection system suitable for large-scale waste slag yard and stability checking and calculating method and construction method thereof |
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