CN206220108U - Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction - Google Patents

Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction Download PDF

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Publication number
CN206220108U
CN206220108U CN201621300966.8U CN201621300966U CN206220108U CN 206220108 U CN206220108 U CN 206220108U CN 201621300966 U CN201621300966 U CN 201621300966U CN 206220108 U CN206220108 U CN 206220108U
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slope
expansive soil
reinforced earth
pressure
toe
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高立
曾晓波
聂文峰
李能
王志伟
张蕊
唐本升
黄永璋
苟文锦
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CREEC Kunming Survey Design and Research Co Ltd
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CREEC Kunming Survey Design and Research Co Ltd
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Abstract

The utility model discloses a kind of Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction, including Cut Slopes of Expansive Soil, toe sets toe retaining structure, domatic setting geomembrane anti-seepage structure, the domatic safeguard structure of reinforced earth and anchoring-bolt system, slope top sets slope top back-pressure leakage preventing structure, its form is simple, safeguard structure is flexible, short construction period, the stability and completion time of project problem of swelled ground high slope can be efficiently solved, is the innovation of railway engineering field steep Cut Slopes of Expansive Soil excavation plan high and support technology.

Description

Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction
Technical field
The utility model belongs to railway subgrade works technical field, is related to the supporting construction of Cut Slopes of Expansive Soil, especially It is related to Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage flexible supporting structure.
Background technology
There is harmomegathus repeatedly when moisture, ground temperature change in the soil body in the range of the climate influenced layer of swelled ground Phenomenon, so as to cause the destruction on soil body top layer, and this destruction is gradually spread to depths.Meanwhile, the harmomegathus power of formation is to firm The effect of property safeguard structure is also that should not be underestimated.During railway construction, more using gentle slope, classification indwelling platform and rigid slope The measures such as face protection ensure the stability of expansive soil slope.Expansive soil slope must be excavated in dry season, protection works Construct, and the excavation of next stage side slope must be carried out after upper level side slope protection engineering reaches design strength.Undoubtedly, expand The excavation of native side slope is protected and brings acid test to the whole duration.When being especially located at tunnel face, Cut Slopes of Expansive Soil Excavation supporting is not complete, cannot just carry out the construction in tunnel, directly contributes the rise of overhead cost.It is limited to steep expansive soil slope high to excavate It is long in time limit, dangerous big so that railway construction process is obstructed again and again, also causes excavation and the supporting side of steep expansive soil slope high Formula turns into the research emphasis and difficult point in railway subgrade works field.
In consideration of it, domestic and foreign scholars have carried out substantial amounts of research work, multiline pile and piling wall combination knot regarding to the issue above Structure is the most frequently used means, although solves the stability problem of expansive soil slope, but can not meet construction period.Patent CN103572777A discloses a kind of geotechnical grid retaining wall and its construction method, can greatly shorten the completion time of project, but it is protected The rigidity of structure can not meet the stability requirement of swelled ground, and it is suitable only for the protection of slope of highway.Flexible bank protection energy The slope protection of expansive soil slope is effectively solved, such as patent CN102535485A discloses a kind of reinforced earth flexible protective cutting The inverse of side slope does engineering method, but it is only applicable to weak soil cut slope, and still can not meet construction period.As can be seen here, it is existing Supporting and retaining system safeguard procedures urgently further improve.Mechanical characteristic is not poor in itself for swelled ground, mainly due to atmospheric effect drastically Beach even side slope overall collapse is slipped in convergent-divergent and causing to layer repeatedly, expansive soil slope is not affected by atmospheric effects drastically layer shadow Ring, finding effective excavation supporting scheme turns into the important topic that current rail is built.
The content of the invention
The purpose of this utility model is the deficiency for above-mentioned prior art, there is provided a kind of Cut Slopes of Expansive Soil Reinforced earth back-pressure antiseepage supporting construction, form is simple, safeguard structure is flexible, short construction period, can efficiently solve expansion The stability and completion time of project problem of native high slope, are railway engineering field steep Cut Slopes of Expansive Soil excavation plan high and supporting The innovation of technology.
To achieve the above object, the utility model is achieved by following technical solution:
Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction, including Cut Slopes of Expansive Soil, toe set toe Retaining structure, domatic setting geomembrane anti-seepage structure, the domatic safeguard structure of reinforced earth and anchoring-bolt system, slope top sets slope top back-pressure Leakage preventing structure.
Preferably, the slope protection structure is the swelled ground reinforcing body of digging in-situ, and reinforcement material is GSZ, instead Be pressed on need to protect it is domatic on.
Preferably, described slope top back-pressure leakage preventing structure is built by laying bricks or stones by mortar flag stone, mortar flag stone top be not less than 2% to Draining face outside side slope, C25 cement sand plaster of the top with thickness not less than 20mm.
Preferably, toe retaining structure uses gravity type cutting retaining wall, anchor pile to use the concrete for being not less than C35, Gravity retaining wall is using the piece stone concrete for being not less than C35.
Construction method is as follows:
1. levelling of the land:Measurement cutting moat top scope, removing need to excavate the topsoil of part;
2. construction equipment is marched into the arena:Expansive soil slope is excavated in dry season, using rapid constructing method, set construction equipment is concentrated Excavate, it is ensured that side slope does not receive rain drop erosion;
3. bench excavation expansive soil slope to toe is divided step by step by design side slope rate, the swelled ground of excavation is steady in influence side slope Stack temporarily nearby in place outside fixed scope;
4. after the completion of whole expansive soil slope is excavated, from toe to slope top classification laying geomembrane, geomembrane need to be close to out Step surface is dug, lap width 0.5m backfills Reinforced Expansive Soils while laying geomembrane, Reinforced Expansive Soils backfill width by excavating Toe is outer 10 meters to toe, is 1 by the backfill ratio of slope of toe to design of pile top elevation:1.5, lay one layer pair every 0.6m levels To GSZ, compaction in layers, compacting factor is not less than 0.90, and every grade of side slope is filled requirement and carries out compacting inspection by roadbed body Survey, can carry out upper level side slope after detection is qualified fills or next process, after being backfilled to design of pile top elevation, by design slope Face classification is backfilling and compacted, while carrying out the excavation of toe retaining structure gravity type cutting retaining wall and pouring for stake;
5. it is backfilled to when pushing up 0.5 meter away from slope, uses M7.5 mortar flag stones instead and build by laying bricks or stones to design slope top, mortar flag stone top is not for Less than 2% to the draining face outside side slope, C25 cement sand plaster of the top with thickness not less than 20mm, meanwhile, by toe to slope Top construction Anchored frame beam, anchor pole presses arranged in squares in Anchored frame beam, and length is 12m, anchors segment length 4m, thus completes road The protection of moat side slope and supporting and retaining system.
3. step can use different size of bench excavation according to different side slope rates, and side slope rate is 1:When 2.0, step is wide 4.0 meters, high 2.0 meters, side slope rate is 1:When 1.75, step is wide 3.5 meters, high 2.0 meters, and side slope rate is 1:When 1.5, step is wide by 3.0 Rice is high 2.0 meters.Step 3. it is middle assume swelled ground atmospheric effect drastically layer depth be h meters, side slope face and flat surface are backbreak h meters.
The utility model Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting, is characterized in:Toe is using gravity between stake Formula cutting retaining wall, it is ensured that side slope resistance to overturning.Domatic laying geomembrane anti-seepage simultaneously uses Reinforced Expansive Soils back-pressure, makes expansion The soil body is placed in atmospheric effect drastically below layer depth, it is to avoid swelled ground occurs repeatedly to expand, shrinks.Slope top uses and grouts piece Stone back-pressure antiseepage, is also that the swelled ground soil body of side slope is closed under safeguard structure.Form rigid toe, slope top and flexible slope The overall supporting and retaining system safeguard structure that face is combined.
The beneficial effects of the utility model are, using the swelled ground of Cutting Excavation of Expressway, to reduce the cost of transportation of material.Together When, rigid protection and flexible protective are combined, and reduce the supporting measure of Against Sliding Stability, save construction costs, flexible reinforcement Soil protection allows the swelled ground soil body to be placed in atmospheric effect drastically below layer depth, it is to avoid cut slope soil body harmomegathus repeatedly.Swelled ground The construction method of cut slope reinforced earth back-pressure antiseepage supporting, can be after side slope be integrally excavated, while toe supporting and retaining system knot of constructing Structure, slope protection structure, largely shorten the duration, are well suited for the excavation branch of duration tight swelled ground high slope Shield.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is that expansive soil slope excavates schematic diagram;
Fig. 3 is to lay composite geo-membrane schematic diagram along excavation face;
Fig. 4 is backfill Reinforced Expansive Soils schematic diagram;
Fig. 5 is for construction toe anchor pile, the domatic reinforced earth of backfill, anchoring-bolt system, slope top back-pressure leakage preventing structure are illustrated simultaneously Figure;
Fig. 6 is construction toe gravity retaining wall schematic diagram;
Label in figure:1 toe retaining structure;2 Fill Reinforced With Geogrids materials;3 backfill reinforced earths;4 expansive soil slopes; Push up back-pressure leakage preventing structure in 5 slopes;6 geomembranes;7 anchor poles;8 swelled grounds.
Specific embodiment
The utility model is described in further detail for 1-6 and specific embodiment below in conjunction with the accompanying drawings.
It will be understood to those of skill in the art that the following example is merely to illustrate the utility model, and should not be regarded as limiting Scope of the present utility model.In the examples where no specific technique or condition is specified, according to the skill described by document in the art Art or condition are carried out according to product description.Device therefor is can be by buying the conventional products for obtaining.
Embodiment 1
Expensive soil cutting high slope reinforced earth back-pressure antiseepage flexibility protective slope structure, including:Cut Slopes of Expansive Soil 4 and toe Retaining structure 1, toe retaining structure 1 can be retaining wall and pile plate wall between gravity type cutting retaining wall, stake.Domatic excavation completes Spread a layer of clay work membrane material along excavation face afterwards, pave it is smooth after backfill reinforced earth body, reinforcement material is GSZ.Be backfilled to away from Use mortar flag stone during the 0.5m of slope top instead and build slope top back-pressure leakage preventing structure 5 by laying bricks or stones, while applying slope protection structure.
Embodiment 2
Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction, concretely comprises the following steps:1. levelling of the land.Measurement cutting moat Top scope, removing need to excavate the topsoil of part;2. construction equipment is marched into the arena, and expansive soil slope must be excavated in dry season, to ensure Side slope does not receive rain drop erosion, it is to avoid expose for a long time, it is necessary to use rapid constructing method, set construction equipment to concentrate and excavate;③ Divide bench excavation side slope to toe step by step by design side slope rate, different size of bench excavation used according to different side slope rates, Side slope rate position 1:2.0, step is wide 4.0 meters, high 2.0 meters, side slope rate position 1:1.75, step is wide 3.5 meters, high 2.0 meters, side slope rate position 1:1.5, step is wide 3.0 meters, high 2.0 meters.Assuming that the atmospheric effect of swelled ground drastically layer depth is h meters, side slope face and flat surface Backbreak h meters.Stack temporarily nearby in place of the swelled ground of excavation outside the scope of influence stability of slope;4. whole slope excavating After the completion of, from toe to slope top classification laying geomembrane, geomembrane need to be close to step excavation face, lap width 0.5m, laying soil Reinforced Expansive Soils are backfilled while work film 6.Backfill reinforced earth 3 backfill width is outer 10 meters to toe by excavation toe, by toe extremely Stake top(Wall top)The backfill ratio of slope of design altitude is 1:1.5.One layer of direction earthwork grille, layering pressure are laid every 0.6m levels Real, compacting factor is not less than 0.90, and every grade of side slope is filled requirement and carries out compacting detection by roadbed body, can be entered after detection is qualified Row upper level side slope is filled or next process.It is backfilled to stake top(Wall top)After design altitude, pressed by domatic classification backfill is designed Real, toe sets anchor pile, while the excavation and pile body that carry out anchor pile are poured;5. be backfilled to away from slope push up 0.5 meter when, use instead M7.5 mortar flag stones are built by laying bricks or stones to design slope top, and mortar flag stone top is to the draining face outside side slope, top thickness not less than 2% C25 cement sand plasters not less than 20mm.Meanwhile, by toe to slope top construction Anchored frame beam, framework case bay 3m, rectangle Thus arrangement, the depth 12m of anchor pole 7 completes protection and the supporting and retaining system of cut slope.
Embodiment 3
Reinforced earth back-pressure antiseepage supporting construction as shown in Figure 1, after side slope once excavates shaping, while applying toe branch Gear structure 1 and slope protection structure(Fill Reinforced With Geogrids material 2, backfill reinforced earth 3, geomembrane 6, anchor pole 7), so as to contract significantly The short duration, it is to avoid swelled ground for a long time exposes.Wherein, Fill Reinforced With Geogrids material 2 lays one layer every 0.6m levels, again Close geomembrane 6 to be laid along excavation face and paved smooth, it is ensured that have the overlap joint of 0.5m.The width and height of step excavation are according to design Side slope rate determines that drastically layer depth determines depth of backbreaking according to the atmospheric effect of swelled ground.Slope top sets mortar flag stone back-pressure and prevents Structure 5 is oozed, prevents from being oozed under surface water, the swelled ground soil body of side slope is in closed state.
The tunnel portal of certain railway line is deep desulphurization expansive soil slope, 219m long, side slope maximum height 29m, totally 3 grades of sides Slope.Expansive soil slope requirement is in dry season construction, if using traditional slope retaining mode, excavating primary protection one-level, it is necessary to 2 Year could complete the excavation supporting of side slope, that is to say, that the construction that can just carry out tunnel afterwards in 2 years, have a strong impact on the duration. Punished using the utility model Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction and its engineering method, specific steps are such as Under:
(1)Levelling of the land.Measurement cutting moat top scope, removing need to excavate the topsoil of part.
(2)Selection dry season construction, is configured by two digging machines of every 50m, and totally 8 digging machine point left and right sides side slopes excavate side simultaneously Slope.
(3)Design side slope rate is 1:2.0, drastically layer depth is 1.8m to swelled ground atmospheric effect, wide 4.0 meters by step, high 2.0 meters, the 1.8m that backbreaks classifications are excavated.The swelled ground of excavation is interim to be stacked at away from the interim mound excavated at point 200m.Side slope Overall excavation takes 57 days.
(4)After the completion of the slope excavating of both sides, tunnel starts construction.That is, conventional construction method needs just enter for 2 years Row constructing tunnel now only needs to can be achieved with for 2 months using the present invention.By toe one layer of composite earth is laid along the step surface for excavating Work film, pave it is smooth after start backfill reinforced earth.Reinforcement earthen backfill width is outer 10 meters to toe by excavation toe, by toe to stake Top(Wall top)The backfill ratio of slope of design altitude is 1:1.5.Every 0.6m levels lay one layer of direction earthwork grille, compaction in layers, Compacting factor is not less than 0.90, and every grade of side slope is filled requirement and carries out compacting detection by roadbed body, is carried out again after detection is qualified One-level side slope is filled or next process.After being backfilled to design of pile top elevation, it is backfilling and compacted by domatic classification is designed, while carrying out The excavation of anchor pile.
(5)Be backfilled to away from slope push up 0.5 meter when, use instead M7.5 mortar flag stones build by laying bricks or stones to design slope top, mortar flag stone top be Not less than 2% to the draining face outside side slope, C25 cement sand plaster of the top with thickness not less than 20mm.Meanwhile, by toe extremely Slope top construction Anchored frame beam, framework case bay 3m, rectangular arrangement, anchor pole depth 12m.
(6)After the Anchored frame beam of slope protection and the anchor pile of toe reach design strength, set by retaining wall between stake Meter requires to excavate the toe soil body, thus completes protection and the supporting and retaining system of cut slope.

Claims (4)

1. Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction, including Cut Slopes of Expansive Soil, it is characterised in that toe Toe retaining structure is set, and domatic setting geomembrane anti-seepage structure, the domatic safeguard structure of reinforced earth and anchoring-bolt system, slope top are set Push up back-pressure leakage preventing structure in slope.
2. Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction according to claim 1, it is characterised in that described Slope protection structure is the swelled ground reinforcing body of digging in-situ, and reinforcement material is GSZ, back-pressure in need to protect it is domatic it On.
3. Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction according to claim 1, it is characterised in that described Slope top back-pressure leakage preventing structure built by laying bricks or stones by mortar flag stone, mortar flag stone top be to the draining face outside side slope, top not less than 2% C25 cement sand plasters with thickness not less than 20mm.
4. Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction according to claim 1, it is characterised in that described Toe retaining structure uses gravity type cutting retaining wall, anchor pile to be used using the concrete for being not less than C35, gravity retaining wall It is not less than the piece stone concrete of C35.
CN201621300966.8U 2016-11-30 2016-11-30 Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction Active CN206220108U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106703050A (en) * 2016-11-30 2017-05-24 中铁二院昆明勘察设计研究院有限责任公司 Expansive soil road cutting side slope reinforced soil back-pressure seepage-preventive supporting structure and construction method thereof
CN108385648A (en) * 2018-01-22 2018-08-10 汕头大学 A method of manufacturing resistance of soil reinforcing material using water plant water hyacinth is harmful to

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106703050A (en) * 2016-11-30 2017-05-24 中铁二院昆明勘察设计研究院有限责任公司 Expansive soil road cutting side slope reinforced soil back-pressure seepage-preventive supporting structure and construction method thereof
CN106703050B (en) * 2016-11-30 2019-06-25 中铁二院昆明勘察设计研究院有限责任公司 Cut Slopes of Expansive Soil reinforced earth back-pressure antiseepage supporting construction and its construction method
CN108385648A (en) * 2018-01-22 2018-08-10 汕头大学 A method of manufacturing resistance of soil reinforcing material using water plant water hyacinth is harmful to
CN108385648B (en) * 2018-01-22 2020-06-05 汕头大学 Method for preparing soil strength reinforcing material by using water hyacinth which is a harmful aquatic plant

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