CN103882884A - Anchor rope geogrid retaining structure and method for constructing same - Google Patents
Anchor rope geogrid retaining structure and method for constructing same Download PDFInfo
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Abstract
The invention discloses an anchor rope geogrid retaining structure and a method for constructing the same. Each retaining structure (1) is provided with multiple levels of side slopes; each single level of side slope structurally comprises more than two basic structural units (4); each basic structural unit comprises a lower waterproof and drainage geogrid wrapped reinforced compacted soil layer and an upper geogrid wrapped reinforced compacted soil layer; a vegetation bag is placed at a certain position of each geogrid wrapped reinforced compacted soil layer and is close to the corresponding side slope; an anchor rope is arranged at the bottom of each level of side slope, is close to a side of the side slope and is connected with geogrid of the corresponding geogrid wrapped reinforced compacted soil layer, and the geogrid of each geogrid wrapped reinforced compacted soil layer is close to the inner side of the corresponding side slope; a top waterproof structural layer is arranged on the top of the top level of flexible retaining structure; ground drainage facilities are arranged on the surfaces of the slopes and include bottom drainage ditches, platform drainage ditches and top intercepting ditches. The anchor rope geogrid retaining structure and the method have the advantages that the method and the anchor rope geogrid retaining structure are particularly applicable to repairing side slopes damaged by water, or the anchor rope geogrid retaining structure is particularly suitable to be used as a decomposed rock or soil cut slope retaining structure.
Description
Technical field
The present invention relates to a kind of highway cutting slope supporting and safeguard structure, particularly relate to a kind of anchor cable geo-grid retaining structure, the invention still further relates to the construction method of this anchor cable geo-grid retaining structure.
Background technology
A kind of flexible reinforcement retaining structure and construction method (Chinese patent thereof, open (bulletin) number: CN100464034, publication date: on February 25th, 2009) the flexible shoring structure that provides of this invention has following architectural feature: be pervious foundation layer at the bottom of retaining structure, between retaining structure and excavation face, have pervious layer, this pervious layer and pervious foundation layer are integrated; Under pervious foundation layer, excavation has sewer; In whole retaining structure, lay muscle material, the muscle material of every layer all exceedes the width of retaining structure, and anti-package is to last layer, and is connected the excavated earthen backfill compacting of every layers of reinforcement material with the muscle material of last layer.This structure is particularly suitable for expansive soil.Due to the suitable design ratio of slope of this structure width designs such as 1:1.5 or 1:1.75, employing of being everlasting, structure width often can be controlled in 4m.In the time that this structure applications is reinforced to the cut slope on mountain area decomposed rock or soil property abrupt slope, sometimes taken over the land for use or the restriction such as surface feature, building, require to maintain cut slope ratio of slope more than 1:0.5.At this moment, the filler in this structure will be applied to expansive soil and other baliki time, because filler shear strength is low, ratio of slope 1:0.5 is difficult to meet design safety requirement above.For improving the resistance to overturning of the local shear strength of former flexible reinforcement retaining structure body and retaining structure, the present invention becomes two-way anti-package by unidirectional former geo-grid anti-package connection and connects to strengthen the globality of flexible reinforcement retaining structure body and the local stability of retaining structure, adopt the rebar element body structure by setting with anti-drainage performance, the anti-drainage blanket arranging in each block construction be used for getting rid of behind slope infiltrate rainwater and different depth underground water and guarantee to fill expansive soil therein or and other baliki in unsaturated state, further to improve the shear strength of compacting filler and the local stability of retaining structure, set up horizontal anchor cable in the bottom of every grade of flexible reinforcement retaining structure to improve the holistic arrestment slippage stabilization of reinforced retaining structures simultaneously.By above improvement, make flexible reinforcement retaining structure can not only be used for the abrupt slope design in expansive soil section, more make flexible reinforcement retaining structure can adopt baliki or other clay filling, therefore can greatly expand the scope of application of reinforced retaining structures in cut slope field of reinforcement.
Summary of the invention
It is more than 1:0.5 decomposed rock or the anchor cable geo-grid retaining structure of soil road slope reinforcement that first technical problem to be solved by this invention is to provide a kind of ratio of slope that is suitable for.
Second technical problem to be solved by this invention is to provide a kind of construction method of anchor cable geo-grid retaining structure.
In order to solve above-mentioned first technical problem, anchor cable geo-grid retaining structure provided by the invention, formed by Slope with multi-step structure, single-stage slope structure is made up of at least 2 basic structural unit stacks, single described basic structural unit comprises bottom water proof and drainage geogrid parcel reinforcement compacting soil layer and two parts of top geo-grid parcel reinforcement compacting soil layer, is placed with a plant biological bag at the position on the slope of keeping to the side of each described bottom water proof and drainage geogrid parcel reinforcement compacting soil layer and top geo-grid parcel reinforcement compacting soil layer; Slope one side of keeping to the side in the bottom of the single-stage slope structure described in every grade is provided with anchor cable, and described anchor cable is connected with the geo-grid of the inner side, slope of keeping to the side in described bottom water proof and drainage geogrid parcel reinforcement compacting soil layer; Top in the described single-stage slope structure at top is provided with top Waterproof structural course; On slope, table is provided with land drainage facility.
Described bottom water proof and drainage geogrid parcel reinforcement compacting soil layer by the anti-seepage geotextile of bottom, be placed in the gravelly soil drainage blanket on described anti-seepage geotextile, the flexible porous tube arranging in side slope inner side, the compacting unsaturated soil being placed on described gravelly soil drainage blanket and form, and by connecting with pitman after two-way geo-grid anti-package, form the reinforcement compacting soil layer being wrapped up by geo-grid; Described top geo-grid parcel reinforcement compacting soil layer is that the geo-grid of being laid by full section is after " U " sprig is fixed, the upper berth unsaturation soil body compaction in layers, then by two-way geo-grid anti-package to the layered soil of compacting and it is formed by connecting with pitman.
Described top Waterproof structural course is made up of anti-seepage geotextile and the loam layer of planting being placed on anti-seepage geotextile.
Described land drainage facility comprises bottom discharge ditch, platform gutter and top catchwater.
In order to solve above-mentioned second technical problem, the invention provides the construction method that realizes anchor cable geo-grid retaining structure, its step is as follows:
(1), the basic structural unit of the bottom of every grade of anchor cable geo-grid retaining structure is constructed according to the following steps:
1. according to designing requirement, in the bottom position boring of every grade of reinforcement supporting and protection structure, anchor cable is installed;
2. excavate, to Reinforced Earth Retaining Structure bottom, lay first floor geo-grid, reserved two-way anti-package, to connecting required length, is laid one deck waterproof geotextiles after " U " sprig is fixing in described geo-grid;
3. be placed with flexible porous tube and fill one deck gravelly soil in the bottom by natural slope one side that is equipped with described waterproof geotextiles;
4. anchor cable is connected with geo-grid;
5. the saturated soil body in the domatic soil body that damage by water occurs or do not come down is removed, selection unsaturated soil is wherein as filler, empty paving 30cm is thick, more than 6 times form first compacting layering with excavator (fuselage quality is more than 2500 kilograms) crawler belt compacting, with the empty paving of unsaturated soil, 30cm is thick then uses equally excavator (fuselage quality is more than 2500 kilograms) crawler belt compacting more than 6 times to form second compacting layering again, and two compacting layerings have formed a compacting soil layer;
6. pile up and plant immature soil bag by the position of slope table in the bottom that is equipped with described waterproof geotextiles;
7. by geo-grid two-way anti-package connecting with pitman on two compacting layerings;
8. 2. lay and fixing geo-grid by step;
9. by step 5. compacting form layered soil and piling up and planting immature soil bag by the position of slope table;
10. 7. two-way geo-grid anti-package is also connected by step;
(2), the basic structural unit on the top of every grade of described anchor cable geo-grid retaining structure by the construction sequence of polycrystalline substance unit 2.～3. and 5.～10. construct;
(3), complete after described anchor cable geo-grid retaining structure first order prop, reserve position of platform, undertaken 1～2 by step and carry out the construction of the second level and third level prop;
(4), complete after the prop construction of whole described anchor cable geo-grid retaining structures, on top shield body, lay one deck anti-seepage geotextile, and on anti-seepage geotextile, fill one deck and plant loam layer, form described top Waterproof structural course;
(5), finally carry out the construction of bottom discharge ditch, platform gutter and top catchwater at slope table.
Adopt anchor cable geo-grid retaining structure and the construction method thereof of technique scheme, the invention provides a kind of can be with anchor cable geogrid-reinforced earth structures baliki or other clay filling and that can be used for steep slope road section (ratio of slope > 1:0.5) highway cutting slope reinforcement.It is the technological improvement to a kind of flexible reinforcement retaining structure and construction method (Chinese patent, open (bulletin) number: CN100464034, publication date: on February 25th, 2009) thereof.Former flexible reinforcement retaining structure can not be used for the cut slope reinforcing that ratio of slope is greater than 1:0.5, the present invention connects unidirectional former geo-grid anti-package to become globality and the local stability that two-way anti-package connects to strengthen flexible reinforcement retaining structure body, there is the rebar element body structure of anti-drainage performance by setting, guarantee to fill expansive soil therein or and other baliki in unsaturated state, further to improve shear strength and the local stability of compacting filler, set up horizontal anchor cable in the bottom of every grade of flexible reinforcement retaining structure to improve the holistic arrestment slippage stabilization of reinforced retaining structures simultaneously.By above improvement, make flexible reinforcement retaining structure can not only be used for the abrupt slope design in expansive soil section, more make flexible reinforcement retaining structure can adopt baliki or other clay filling, therefore can greatly expand the scope of application of reinforced retaining structures in cut slope field of reinforcement.
Anchor cable geo-grid retaining structure provided by the invention and construction method thereof, have compared with mortar flag stone retaining wall that cost is lower slightly, speed of application is fast, working security is good, and the good advantage of the feature of environmental protection, compared with conventional geogrid reinforced retaining wall structure, because need adopting sandy soil, fills its filler of conventional geogrid reinforced retaining wall, in the time of the reinforcing of the road slope to Weathering-residual clay or general clay soil property, because filler can not be gathered materials on the spot and adopted the clay in side slope, clay in discarded side slope and strange land excavation sandy soil all can cause soil erosion, cause environmental disruption, and increase construction cost, and the present invention can select to have occurred damage by water (slip and collapse) or the unsaturated soil in the domatic soil body of excavation on landslide (comprise residual clay, high liquid limit clay etc.) as filler, filling compacting with excavator forms low degree of compaction soil layer and can be used as reinforced earth body, adopt excavator to fill compacting and not only saved compacting equipment and construction cost, also greatly improved speed of application, therefore, it is lower slightly that anchor cable geo-grid retaining structure provided by the invention also has cost compared with general geogrid reinforced retaining wall structure, speed of application is fast, working security is good, and the advantage that the feature of environmental protection is good.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Referring to Fig. 1, anchor cable geo-grid retaining structure provided by the invention, retaining structure 1 by Slope with multi-step structure form by top one-level flexible shoring structure 3 and at least one-level edge slope structure 2 form, each edge slope structure 2 is made up of multiple basic structural unit 4 stacks, single basic structural unit 4 comprises bottom water proof and drainage geogrid parcel reinforcement compacting soil layer 5 and 6 two parts of top geo-grid parcel reinforcement compacting soil layer, position on the slope of keeping to the side of each bottom water proof and drainage geogrid parcel reinforcement compacting soil layer 5 and top geo-grid parcel reinforcement compacting soil layer 6 is placed with a plant biological bag 7, slope one side of keeping to the side in the bottom of every grade of single-stage slope structure is provided with anchor cable 8, and anchor cable 8 is connected with the geo-grid of the inner side, slope of keeping to the side in bottom water proof and drainage geogrid parcel reinforcement compacting soil layer 5, top in the top at top one-level flexible shoring structure 3 is provided with top Waterproof structural course 9, on slope, table is provided with land drainage facility, and land drainage facility comprises bottom discharge ditch 21, platform gutter 20 and top catchwater 22.
Bottom water proof and drainage geogrid parcel reinforcement compacting soil layer 5 by the anti-seepage geotextile 10 of bottom, be placed in the permeable geotextiles drainage blanket 11 on described anti-seepage geotextile 10, the flexible porous tube 12 arranging in side slope inner side, the compacting unsaturated soil 13 being placed on permeable geotextiles drainage blanket 11 and form, and after the two-way anti-package of geo-grid is connected with pitman, formed the reinforcement compacting soil layer being wrapped up by geo-grid 14; Top geo-grid parcel reinforcement compacting soil layer 6 is fixing through " U " sprigs 15 by full face geo-grid 14, the compacting layering of wrapping up reinforcement by the two-way anti-package unsaturation of geo-grid layered soil 16 geo-grid 14 being connected to form with pitman.
Top Waterproof structural course 9 is made up of anti-seepage geotextile 18, the loam layer 19 of planting that is placed on anti-seepage geotextile 18.
The construction method that realizes anchor cable geo-grid retaining structure provided by the invention, step is as follows:
1. the basic structural unit 4 of the bottom of every grade of anchor cable geo-grid retaining structure can be constructed according to the following steps:
Referring to Fig. 1,1. according to designing requirement, in the bottom position boring of every grade of reinforcement supporting and protection structure, anchor cable 8 is installed; 2. excavate, to Reinforced Earth Retaining Structure bottom, lay first floor geo-grid 14, the reserved two-way anti-package of geo-grid 14, to connecting required length, is laid one deck waterproof geotextiles 10 after " U " sprig 15 is fixing in geo-grid 14; 3. be placed with flexible porous tube 12 and permeable geotextiles drainage blanket 11 in the bottom by natural slope one side that is equipped with waterproof geotextiles 10; 4. anchor cable 8 is connected with geo-grid 14; 5. the saturated soil body in the domatic soil body that damage by water (slip and collapse) occurs or do not come down is removed, selection unsaturated soil (comprising residual clay, high liquid limit clay etc.) is wherein as filler, empty paving 30cm is thick, more than 6 times form first compacting layering with excavator (fuselage quality is more than 2500 kilograms) crawler belt compacting, with the empty paving of unsaturated soil, 30cm is thick then uses equally excavator (fuselage quality is more than 2500 kilograms) crawler belt compacting more than 6 times to form second compacting layering again, and two compacting layerings have formed soil layer (13); 6. pile up and plant immature soil bag 7 by the position of slope table in the bottom that is equipped with waterproof geotextiles 10; 7. by geo-grid 14 two-way anti-package connecting with pitman on compacting unsaturated soil 13; 8. 2. lay and fixing geo-grid 14 by step; 9. by step 5. compacting form layered soil 16 and piling up and planting immature soil bag 7 by the position of slope table; 10. 7. two-way geo-grid 14 anti-package is also connected by step.
The basic structural unit 4 on the top of every grade of anchor cable geo-grid retaining structure by the construction sequence of polycrystalline substance unit 2.～3. and 5.～10. construct.
3. complete after anchor cable geo-grid retaining structure first order prop, reserve position of platform, undertaken 1～2 by step and carry out the construction of the second level and third level prop;
4. complete after the prop construction of whole anchor cable geo-grid retaining structures, lay one deck anti-seepage geotextile 18, and on anti-seepage geotextile 18, fill one deck and plant loam layer 19 on top shield body, this has just formed top Waterproof structural course 9.
5. finally carry out the construction of bottom discharge ditch 21, platform gutter 20 and top catchwater 22 at slope table.
Adopt anchor cable geo-grid retaining structure and the construction method thereof of technique scheme, to a kind of flexible reinforcement retaining structure and construction method (Chinese patent thereof, open (bulletin) number: CN100464034, publication date: on February 25th, 2009) technological improvement.Former flexible reinforcement retaining structure can not be used for the cut slope reinforcing that ratio of slope is greater than 1:0.5, the present invention connects unidirectional former geo-grid anti-package to become globality and the local stability that two-way anti-package connects to strengthen flexible reinforcement retaining structure body, adopt the rebar element body structure by setting with anti-drainage performance, guarantee to fill expansive soil therein or and other baliki in unsaturated state, further to improve shear strength and the local stability of compacting filler, set up horizontal anchor cable in the bottom of every grade of flexible reinforcement retaining structure to improve the holistic arrestment slippage stabilization of reinforced retaining structures simultaneously.By above improvement, make flexible reinforcement retaining structure can not only be used for the abrupt slope design in expansive soil section, more make flexible reinforcement retaining structure can adopt baliki or other clay filling, therefore can greatly expand the scope of application of reinforced retaining structures in cut slope field of reinforcement.
At present, the reinforcing that is the road slope of more than 1:0.5 Weathering-residual clay or general clay soil property for ratio of slope often adopts mortar flag stone retaining wall structure or conventional geogrid reinforced retaining wall structure to design.Because mortar flag stone retaining wall speed of application is slow, working security is poor and difficult greening, therefore, anchor cable geo-grid retaining structure provided by the invention and construction method thereof, have compared with mortar flag stone retaining wall that cost is lower slightly, speed of application is fast, working security is good, and the good advantage of the feature of environmental protection, compared with conventional geogrid reinforced retaining wall structure, because need adopting sandy soil, fills its filler of conventional geogrid reinforced retaining wall, in the time of the reinforcing of the road slope to Weathering-residual clay or general clay soil property, because filler can not be gathered materials on the spot and adopted the clay in side slope, clay in discarded side slope and strange land excavation sandy soil all can cause soil erosion, cause environmental disruption, and increase construction cost, and the present invention can select to have occurred on reinforcing side slope damage by water (slip and collapse) or the unsaturated soil in the domatic soil body on landslide (comprise residual clay, high liquid limit clay etc.) as filler, after compacting, can be used as reinforced earth body, therefore, anchor cable geo-grid retaining structure provided by the invention is compared with general geogrid reinforced retaining wall structure, also there is cost lower slightly, speed of application is fast, working security is good, and the advantage that the feature of environmental protection is good.
Claims (5)
1. an anchor cable geo-grid retaining structure, it is characterized in that: formed by Slope with multi-step structure, single-stage slope structure is made up of at least 2 basic structural units (4) stack, single described basic structural unit (4) comprises bottom water proof and drainage geogrid parcel reinforcement compacting soil layer (5) and (6) two parts of top geo-grid parcel reinforcement compacting soil layer, the position of wrapping up the slope of keeping to the side of reinforcement compacting soil layer (6) in each described bottom water proof and drainage geogrid parcel reinforcement compacting soil layer (5) and top geo-grid is placed with a plant biological bag (7), slope one side of keeping to the side in the bottom of the single-stage slope structure described in every grade is provided with anchor cable (8), and described anchor cable (8) is connected with the geo-grid of the inner side, slope of keeping to the side in described bottom water proof and drainage geogrid parcel reinforcement compacting soil layer (5), be provided with top Waterproof structural course (9) at the top of the described single-stage slope structure at top, on slope, table is provided with land drainage facility.
2. anchor cable geo-grid retaining structure according to claim 1, it is characterized in that: described bottom water proof and drainage geogrid parcel reinforcement compacting soil layer (5) are the anti-seepage geotextiles (10) by bottom, be placed in the permeable geotextiles drainage blanket (11) on described anti-seepage geotextile (10), the flexible porous tube (12) arranging in side slope inner side, be placed in compacting unsaturated soil (13) composition on described permeable geotextiles drainage blanket (11), and geo-grid is the earth grille of the bituminous coating of 6 meters of fabric widths, geo-grid needs two-way anti-package and connects with pitman, form the reinforcement compacting soil layer by geo-grid (14) parcel, described top geo-grid parcel reinforcement compacting soil layer (6) is fixing through " U " sprig (15) by full face geo-grid (14), after connecting by the two-way anti-package of unsaturated soil compacting layered soil (16) and with pitman by geo-grid, forms.
3. anchor cable geo-grid retaining structure according to claim 1 and 2, is characterized in that: described top Waterproof structural course (9) is made up of anti-seepage geotextile (18), the loam layer (19) of planting that is placed on anti-seepage geotextile (18).
4. anchor cable geo-grid retaining structure according to claim 1 and 2, is characterized in that: described land drainage facility comprises bottom discharge ditch (21), platform gutter (20) and top catchwater (22).
5. the construction method that realizes anchor cable geo-grid retaining structure claimed in claim 1, its steps characteristic is:
(1), the basic structural unit (4) of the bottom of every grade of anchor cable geo-grid retaining structure is constructed according to the following steps:
1. according to designing requirement, in the bottom position boring of every grade of reinforcement supporting and protection structure, anchor cable (8) is installed;
2. excavate, to Reinforced Earth Retaining Structure bottom, lay first floor geo-grid (14), reserved two-way anti-package, to connecting required length, is above laid one deck waterproof geotextiles (10) in described geo-grid (14) after " U " sprig (15) is fixing;
3. be placed with flexible porous tube (12) and lay the permeable geotextiles of one deck (11) in the bottom by natural slope one side that is equipped with described waterproof geotextiles (10);
4. anchor cable (8) is connected with geo-grid (14);
5. the saturated soil body in the domatic soil body that damage by water occurs or do not come down is removed, selection unsaturated soil is wherein as filler, empty paving 30cm is thick, more than 6 times form first compacting layering with excavator (fuselage quality is more than 2500 kilograms) crawler belt compacting, more than 6 times form second compacting layering with excavator (fuselage quality is more than 2500 kilograms) crawler belt compacting equally with the empty paving of unsaturated soil 30cm is thick again, two compacting layerings have formed soil layer (13);
6. pile up and plant immature soil bag (7) by the position of slope table in the bottom that is equipped with described waterproof geotextiles (10);
7. by geo-grid (14) two-way anti-package connecting with pitman on compacting soil layer (13);
8. 2. lay by step and fixing geo-grid (14);
9. by step 5. compacting form layered soil (16) and piling up and planting immature soil bag (7) by the position of slope table;
10. 7. the two-way anti-package of geo-grid (14) is also connected by step;
(2), the basic structural unit (4) on the top of every grade of described anchor cable geo-grid retaining structure by the construction sequence of polycrystalline substance unit 2.～3. and 5.～10. construct;
(3), complete after described anchor cable geo-grid retaining structure first order prop (2), reserve position of platform, undertaken 1～2 by step and carry out the construction of the second level and third level prop;
(4), complete after the prop construction of whole described anchor cable geo-grid retaining structures, on top shield body, lay one deck anti-seepage geotextile (18), and on anti-seepage geotextile (18), fill one deck and plant loam layer (19), form described top Waterproof structural course (9);
(5), finally carry out the construction of bottom discharge ditch (21), platform gutter (20) and top catchwater (22) at slope table.
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