CN113718572A - Light two grey dirt road bed structures based on solid useless utilization - Google Patents
Light two grey dirt road bed structures based on solid useless utilization Download PDFInfo
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- CN113718572A CN113718572A CN202110103236.8A CN202110103236A CN113718572A CN 113718572 A CN113718572 A CN 113718572A CN 202110103236 A CN202110103236 A CN 202110103236A CN 113718572 A CN113718572 A CN 113718572A
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- 239000007787 solid Substances 0.000 title description 2
- 239000002689 soil Substances 0.000 claims abstract description 164
- 239000006260 foam Substances 0.000 claims abstract description 64
- 239000004746 geotextile Substances 0.000 claims abstract description 48
- 239000002910 solid waste Substances 0.000 claims abstract description 41
- 239000004575 stone Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002956 ash Substances 0.000 claims description 33
- 239000004927 clay Substances 0.000 claims description 12
- 238000004873 anchoring Methods 0.000 claims description 10
- 239000004571 lime Substances 0.000 claims description 6
- -1 polyethylene terephthalate Polymers 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000010881 fly ash Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920006327 polystyrene foam Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 239000012209 synthetic fiber Substances 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 19
- 239000000463 material Substances 0.000 abstract description 15
- 239000004035 construction material Substances 0.000 abstract description 7
- 239000000945 filler Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 238000005422 blasting Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/227—Gutters; Channels ; Roof drainage discharge ducts set in sidewalks
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
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- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of road foundation engineering, in particular to a light two-ash soil foundation structure based on solid waste utilization, which comprises an anti-seepage geotextile layer, a broken stone cushion layer, a water seepage geotextile layer, a lower layer foam light soil layer, a middle layer foam light soil layer, an upper layer foam light soil layer, a geocell reinforced light soil layer, a waterproof geotextile layer and a side slope which are laid in a trapezoidal shape from bottom to top in sequence; the side slope extends from the anti-seepage geotextile layer to the waterproof geotextile layer; the geocell reinforced light soil layer is arranged in the upper foamed light soil layer. The invention can effectively apply bulk solid waste to roadbed materials, can reduce the pollution to the environment and effectively reduce the source problem of highway engineering construction materials compared with the traditional roadbed filling material, thereby solving the problem that the increasing requirements of engineering construction can not be met due to the shortage of highway construction resources and high-quality construction materials in the prior art.
Description
Technical Field
The invention relates to the technical field of road subgrade engineering, in particular to a light two-ash subgrade structure based on solid waste utilization.
Background
The soft soil distribution is very wide, the phenomenon of soft soil foundation settlement and instability is easily caused by overlying load in engineering construction, and the conventional treatment method has the disadvantages of high construction difficulty, long construction period, high cost and certain limitation. The light soil is used as a filling material, so that the upper filling load can be reduced, the additional stress of the soft soil foundation can be reduced, a new technical means is provided for solving the engineering problem, and the light soil is widely applied to the aspects of soft soil foundation, abutment back filling, engineering backfilling and the like at the present stage.
In the prior art, a large amount of natural resources are needed for constructing a roadbed and a base course by adopting a traditional method in highway engineering construction, the blasting of mountain stones and the digging of a river to take sand not only can cause serious damage to the natural environment, but also the original gravel materials can not meet the increasing requirements of the engineering construction, so that the problems of large resource investment, serious waste and the like are caused.
Disclosure of Invention
Aiming at the technical problems, the invention provides a light-weight two-ash soil roadbed structure based on solid waste utilization, which aims to solve the problems that a large amount of natural resources are needed for constructing a roadbed and a base layer by using the method in the prior art, the natural environment is seriously damaged by blasting mountain stones and digging a river to extract sand, and the original gravel materials are far from meeting the increasing requirements of engineering construction, so that the resource investment is large and the waste is serious.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a light two-ash soil roadbed structure based on solid waste utilization, which comprises an anti-seepage geotextile layer, a broken stone cushion layer, a water seepage geotextile layer, a lower layer foam lightweight soil layer, a middle layer foam lightweight soil layer, an upper layer foam lightweight soil layer, a geocell reinforcement lightweight soil layer, a waterproof geotextile layer and a side slope which are sequentially paved in a trapezoidal manner from bottom to top; the side slope extends from the anti-seepage geotextile layer to the waterproof geotextile layer, and is distributed on two sides of the anti-seepage geotextile layer, the broken stone cushion layer, the water seepage geotextile layer, the lower layer foam light soil layer, the middle layer foam light soil layer, the upper layer foam light soil layer, the geocell reinforced light soil layer and the waterproof geotextile layer and inclines outwards; the geocell reinforced light soil layer is arranged in the upper foamed light soil layer.
The invention provides a light two-ash soil roadbed structure based on solid waste utilization, and further, the lower layer foam light soil layer adopts a wet density of 650kg/m3–850kg/m3The foam light-weight lime-clay is poured; the middle layer foam light soil layer adopts wet density of 850kg/m3–950kg/m3The foam light-weight lime-clay is poured; the upper foamed light soil layer adopts a wet density of 1200kg/m3–1300kg/m3The foam light-weight lime-clay is poured.
The invention provides a light-weight two-ash soil roadbed structure based on solid waste utilization, further, the foamed light-weight two-ash soil comprises the following components in percentage by mass: 1 to 6 percent of spherical EPS polystyrene foam, 5 to 8 percent of lime, 10 to 25 percent of fly ash and 4 to 10 percent of water glass.
The light two-ash soil roadbed structure based on solid waste utilization further comprises fiber mesh layers paved among the lower layer foam light soil layer, the middle layer foam light soil layer and the upper layer foam light soil layer.
The invention provides a light two-ash soil roadbed structure based on solid waste utilization, and further, a geocell reinforced light soil layer adopts a wet density of 1200kg/m3–1300kg/m3The foamed light-weight lime-clay soil is filled.
The light two-ash soil roadbed structure based on solid waste utilization further comprises a net-shaped rib belt structure arranged in the geocell reinforced light soil layer; the net-shaped rib belt structure is a three-dimensional grid-shaped structure formed by riveting a plurality of rib belts and a plurality of anchoring parts.
The light-weight two-ash soil roadbed structure based on solid waste utilization is characterized in that the rib belts are made of polyethylene terephthalate.
The light two-ash soil roadbed structure based on solid waste utilization further comprises protective plastics wrapped outside the anchoring piece.
The light two-ash-soil roadbed structure based on solid waste utilization provided by the invention further comprises waterproof ditches arranged on two sides of the light two-ash-soil roadbed structure; the waterproof ditch is filled with gravels.
The light-weight two-ash soil roadbed structure based on solid waste utilization is further characterized in that the seepage-proof geotechnical cloth layer and the water-seepage geotechnical cloth layer are both made of synthetic fibers; the waterproof geotextile layer is polyethylene geotextile or polyvinyl chloride geotextile.
The technical scheme has the following advantages or beneficial effects:
the invention provides a light two-ash soil roadbed structure based on solid waste utilization, which comprises an anti-seepage geotextile layer, a broken stone cushion layer, a water seepage geotextile layer, a lower layer foam lightweight soil layer, a middle layer foam lightweight soil layer, an upper layer foam lightweight soil layer, a geocell reinforcement lightweight soil layer, a waterproof geotextile layer and a side slope which are sequentially paved in a trapezoidal manner from bottom to top; the side slope extends from the anti-seepage geotextile layer to the waterproof geotextile layer; the geocell reinforced light soil layer is arranged in the upper foamed light soil layer. On one hand, the solid waste is applied to the roadbed material, compared with the traditional roadbed filling material, the material does not need to destroy natural resources, is more environment-friendly, realizes the reutilization of the resources, and simultaneously reduces the engineering cost of the roadbed to a greater extent; on the other hand, the lower layer foam light soil layer, the middle layer foam light soil layer and the upper layer foam light soil layer are formed by pouring three foam light soil layers with different densities in a layered mode, the density of each foam light soil layer can be adaptively changed according to the actual engineering, and compared with a roadbed which is poured by adopting light soil completely, the controllability is higher; in addition, the geocell reinforced light soil layer is filled in the upper foamed light soil layer, so that the bearing strength of the roadbed can be ensured, and the thickness of the upper soil layer can be reduced to a certain extent, thereby reducing the construction period and cost of roadbed engineering; more importantly, the lower layer foam light soil layer, the middle layer foam light soil layer and the upper layer foam light soil layer are all formed by filling light and high-strength fillers in a layered mode, so that the settlement value of the foundation caused by additional stress generated by the fillers is reduced, and the bearing strength of the roadbed is further improved.
Drawings
The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
FIG. 1 is a schematic partial structural view of a light-weight two-mortar roadbed structure based on solid waste utilization provided by the embodiment 1 of the invention;
fig. 2 is a schematic structural diagram of a single geocell in the light-weight two-mortar subgrade structure based on solid waste utilization provided by the embodiment 1 of the invention.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention without making creative efforts, belong to the protection scope of the invention.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
in the prior art, a large amount of natural resources are needed for constructing a roadbed and a base course by adopting a traditional method in highway engineering construction, the blasting of mountain stones and the digging of a river to take sand not only can cause serious damage to the natural environment, but also the original gravel materials can not meet the increasing requirements of the engineering construction, so that the problems of large resource investment, serious waste and the like are caused.
In order to solve the above technical problems, a light-weight two-mortar roadbed structure 1 based on solid waste utilization provided by embodiment 1 of the present invention includes, as shown in fig. 1, an impermeable geotextile layer 11, a gravel cushion layer 12, a water-permeable geotextile layer 13, a lower foamed lightweight soil layer 14, an intermediate foamed lightweight soil layer 15, an upper foamed lightweight soil layer 16, a geocell reinforced lightweight soil layer 17, a waterproof geotextile layer 18, and a side slope 19, which are laid in a trapezoidal shape from bottom to top in sequence; the side slope 19 extends from the anti-seepage geotextile layer 11 to the waterproof geotextile layer 18, and the side slope 19 is distributed on two sides of the anti-seepage geotextile layer 11, the broken stone cushion layer 12, the water-seepage geotextile layer 13, the lower layer foam light soil layer 14, the middle layer foam light soil layer 15, the upper layer foam light soil layer 16, the geocell reinforcement light soil layer 17 and the waterproof geotextile layer 18 and inclines outwards; the geocell reinforced light soil layer 17 is arranged in the upper foamed light soil layer 16. Wherein, the seepage-proof geotextile layer 11 and the water-seepage geotextile layer 13 are both made of synthetic fibers; the waterproof geotextile layer 18 is polyethylene geotextile or polyvinyl chloride geotextile. Specifically, the slope of the roadbed slope 19 in the present embodiment is 1: 1.5; the thickness of the gravel cushion 12 is 100 mm; the thickness of the lower foamed light soil layer 14 is 500mm-600 mm; the thickness of the middle layer of foamed light soil is 200mm-300mm, and the thickness of the upper layer of foamed light soil is 400mm-600 mm; the thickness of the geocell reinforced light soil layer 17 is 10cm, and only one layer is laid.
According to the light-weight two-ash roadbed structure 1 based on solid waste utilization, on one hand, a large amount of solid waste is applied to roadbed materials, compared with the traditional roadbed filling material, natural resources do not need to be damaged, the structure is more green and environment-friendly, the recycling of resources is realized, and meanwhile, the engineering cost of a roadbed is reduced to a greater extent; on the other hand, the lower foamed light soil layer 14, the middle foamed light soil layer 15 and the upper foamed light soil layer 16 are formed by pouring three foamed light soil layers with different densities in a layered mode, the density of each foamed light soil layer can be adaptively changed according to actual engineering during construction, and compared with a roadbed which is poured by adopting light soil completely, the controllability is higher; in addition, the geocell reinforced light soil layer 17 is filled in the upper foamed light soil layer 16, so that the bearing strength of the roadbed can be ensured, and the thickness of the upper soil layer can be reduced to a certain extent, thereby reducing the construction period and the cost of roadbed engineering; more importantly, the lower foamed light soil layer 14, the middle foamed light soil layer 15 and the upper foamed light soil layer 16 are all formed by filling lightweight and high-strength fillers in a layered mode, so that the settlement value of the foundation caused by additional stress generated by the fillers is reduced, and the bearing strength of the roadbed is further improved. Therefore, the light-weight second-ash roadbed structure 1 based on solid waste utilization can apply solid waste to roadbed materials, reduce pollution to the environment, effectively reduce the source problem of highway engineering construction materials, and solve the problems that the increasing requirements of engineering construction cannot be met due to the fact that the highway construction resources are poor and high-quality construction materials are lack in the prior art.
In order to more effectively solve the problem of shortage of highway construction resources and high-quality construction materials, in the light-weight two-ash soil roadbed structure 1 based on solid waste utilization provided by the embodiment, further, the lower foamed light soil layer 14 adopts a wet density of 650kg/m3-850kg/m3The foam light-weight lime-clay is poured; the middle layer foam light soil layer 15 adopts a wet density of 850kg/m3-950kg/m3The foam light-weight lime-clay is poured; the upper foamed light soil layer 16 adopts a wet density of 1200kg/m3-1300kg/m3The foam light-weight lime-clay is poured. The foamed light-weight lime soil comprises the following components in percentage by mass: 1 to 6 percent of spherical EPS polystyrene foam, 5 to 8 percent of lime, 10 to 25 percent of fly ash and 4 to 10 percent of water glass.
The strength of each layer of foamed lightweight soil was measured by the unconfined compressive strength test, and the peak stress of the stress-strain curve was taken as the unconfined compressive strength, and the results are shown in table 1:
TABLE 1 foam light two-lime soil unconfined compressive strength values (kPa) of different ages
As can be seen from Table 1, the unconfined compressive strength of the foamed light lime-clay soil for roadbed meets the current road roadbed design Specification (JTG D30-2015).
By utilizing a large amount of solid wastes such as lime, fly ash and waste foam in the roadbed material, on one hand, the problem of environmental pollution caused by waste solid materials can be effectively solved, the waste solid materials are recycled, the serious damage of mining stones to the ecology is reduced, and the pollution to the environment is further reduced; on the other hand, the method can also reduce the source problem of highway engineering construction materials to a greater extent, and further solve the problem that highway construction resources and high-quality construction materials are deficient.
In order to further improve the bonding firmness among soil layers, in the light-weight two-ash soil roadbed structure 1 based on solid waste utilization provided by the embodiment, a fiber mesh layer 110 is further laid among the lower foamed light soil layer 14, the middle foamed light soil layer 15 and the upper foamed light soil layer 16. The fiber net layers 110 are laid at the joints among adjacent layers of the lower-layer foam light soil layer 14, the middle-layer foam light soil layer 15 and the upper-layer foam light soil layer 16, specifically, each fiber net layer 110 is composed of impermeable geotextile, and is fixed among the adjacent foam light soil layers through the metal nets and the anchor rods, and the metal nets adopt galvanized wire nets, so that the phenomena of local slippage among the adjacent foam light soil layers, interlocking sliding among the soil layers and the like can be effectively avoided, the combination firmness among the adjacent soil layers is improved, and the overall structural strength of the roadbed is further improved.
In order to further improve the stability of the roadbed structure, the light two-ash roadbed structure 1 based on solid waste utilization provided by the embodiment, further, the geocell reinforced light soil layer 17 adopts a wet density of 1200kg/m3-1300kg/m3The foam light-weight two-ash soil is filled. Similarly, geotechnological check room adds muscle light soil layer 17 adopts the two grey soil fill of foam light that are the same with the wet density of upper foam light soil layer 16 to fill, compares in traditional road bed filler, not only can alleviate the dead weight of road bed effectively, and its compressibility is little, concreties soon, can also reduce the internal stress of road bed by a wide margin to avoid the problem that the road bed subsides effectively, further make the structure of road bed more stable.
In order to further improve the bearing strength of the roadbed, the light two-ash soil roadbed structure 1 based on solid waste utilization provided by the embodiment is further provided with a net-shaped rib belt structure in the geocell reinforced light soil layer 17; the net-shaped rib belt structure is a three-dimensional grid-shaped structure formed by riveting a plurality of rib belts and a plurality of anchoring parts. Wherein the rib band is made of high strength PET, i.e. polyethylene terephthalate. The outside of the anchoring piece is wrapped with protective plastic. By arranging a net-shaped rib belt mechanism, namely, a latticed three-dimensional structure is formed by riveting the rib belt and the anchoring piece, so thatThe bearing strength of the geocell reinforced light soil layer 17 is improved, so that the integral bearing strength of the roadbed is improved; the polyethylene glycol terephthalate has better mechanical property and chemical property, so that the integral bearing strength of the roadbed can be further improved; in addition, the protective plastic is wrapped outside the anchoring piece, so that the anchoring piece can be effectively protected, the anchoring piece is prevented from being corroded, the service life of the net-shaped rib belt structure is prolonged, and the working reliability of the net-shaped rib belt structure is further ensured; specifically, referring to fig. 2, the length of a single hole of a single geocell is L, L is 20cm-25cm, the width of the single hole is B, B is 10cm-15cm, the thickness of a geocell sheet is 2mm, and the area of the single hole is 100cm2-150cm2The geogrid chamber needs to be subjected to a tensioning process before construction, and the tensioning purpose is to give a prestress to the geogrid chamber, so that the reinforcement constraint force of the geogrid chamber on a soil body is further improved.
In order to further enhance the drainage effect of the roadbed, the light-weight second-ash roadbed structure 1 based on solid waste utilization provided by the embodiment is further provided with waterproof ditches 111 on two sides of the light-weight second-ash roadbed structure; the waterproof trench 111 is filled with gravels; specifically, the width of the water-repellent trench 111 is about 15 cm. The waterproof ditches 111 are arranged on the two sides of the light two-ash soil roadbed structure, so that roadbed water collected in the anti-seepage geotechnical cloth layer 11 can be effectively prevented from flowing downwards, and the drainage effect of the roadbed is further enhanced.
In conclusion, the light-weight two-ash soil roadbed structure based on solid waste utilization provided by the invention can be used for applying a large amount of solid waste to roadbed materials, does not need to destroy natural resources compared with the traditional roadbed filling material, is more environment-friendly, realizes resource recycling and reduces the engineering cost of a roadbed to a greater extent; on the other hand, the lower layer foam light soil layer, the middle layer foam light soil layer and the upper layer foam light soil layer are formed by pouring three foam light soil layers with different densities in a layered mode, the density of each foam light soil layer can be adaptively changed according to the actual engineering, and compared with a roadbed which is poured by adopting light soil completely, the controllability is higher; in addition, the geocell reinforced light soil layer is filled in the upper foamed light soil layer, so that the bearing strength of the roadbed can be ensured, and the thickness of the upper soil layer can be reduced to a certain extent, thereby reducing the construction period and cost of roadbed engineering; more importantly, the lower layer foam light soil layer, the middle layer foam light soil layer and the upper layer foam light soil layer are all formed by filling light and high-strength fillers in a layered mode, so that the settlement value of the foundation caused by additional stress generated by the fillers is reduced, and the bearing strength of the roadbed is further improved.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A light two-ash soil roadbed structure based on solid waste utilization is characterized by comprising an anti-seepage geotextile layer, a broken stone cushion layer, an anti-seepage geotextile layer, a lower layer foam lightweight soil layer, a middle layer foam lightweight soil layer, an upper layer foam lightweight soil layer, a geocell reinforcement lightweight soil layer, a waterproof geotextile layer and a side slope which are sequentially laid in a trapezoidal manner from bottom to top;
the side slope extends from the anti-seepage geotextile layer to the waterproof geotextile layer, and is distributed on two sides of the anti-seepage geotextile layer, the broken stone cushion layer, the water seepage geotextile layer, the lower layer foam light soil layer, the middle layer foam light soil layer, the upper layer foam light soil layer, the geocell reinforced light soil layer and the waterproof geotextile layer and inclines outwards; the geocell reinforced light soil layer is arranged in the upper foamed light soil layer.
2. The light-weight two-ash soil roadbed structure based on solid waste utilization, wherein the lower layer foam light soil layer adopts a wet density of 650kg/m3-850kg/m3The foam light-weight lime-clay is poured; the middle layer foam light soil layer adopts wet density of 850kg/m3-950kg/m3The foam light-weight lime-clay is poured; the upper foamed light soil layer adopts a wet density of 1200kg/m3-1300kg/m3The foam light-weight lime-clay is poured.
3. The light-weight two-ash soil roadbed structure based on solid waste utilization, according to claim 2, wherein the foamed light-weight two-ash soil comprises the following components in percentage by mass: 1 to 6 percent of spherical EPS polystyrene foam, 5 to 8 percent of lime, 10 to 25 percent of fly ash and 4 to 10 percent of water glass.
4. The light-weight two-ash soil roadbed structure based on solid waste utilization according to claim 1, wherein fiber mesh layers are laid among the lower layer foamed light soil layer, the middle layer foamed light soil layer and the upper layer foamed light soil layer.
5. The light-weight two-ash soil roadbed structure based on solid waste utilization according to claim 2, wherein the geocell reinforced light soil layer adopts a wet density of 1200kg/m3-1300kg/m3The foamed light-weight lime-clay soil is filled.
6. The light-weight two-ash soil roadbed structure based on solid waste utilization according to claim 1, wherein a reticular rib belt structure is arranged in the geocell reinforced light soil layer; the net-shaped rib belt structure is a three-dimensional grid-shaped structure formed by riveting a plurality of rib belts and a plurality of anchoring parts.
7. The light-weight lime-soil roadbed structure based on solid waste utilization according to claim 6, wherein the rib belts are made of polyethylene terephthalate.
8. The light-weight two-ash soil roadbed structure based on solid waste utilization, wherein the outside of the anchoring piece is wrapped with protective plastic.
9. The light-weight lime-soil roadbed structure based on solid waste utilization according to claim 1, wherein waterproof ditches are arranged on two sides of the light-weight lime-soil roadbed structure; the waterproof ditch is filled with gravels.
10. The light-weight two-ash soil roadbed structure based on solid waste utilization according to claim 1, wherein the seepage-proofing geotextile layer and the water-permeable geotextile layer are both made of synthetic fibers; the waterproof geotextile layer is polyethylene geotextile or polyvinyl chloride geotextile.
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| CN103410072A (en) * | 2013-08-20 | 2013-11-27 | 广东盛瑞土建科技发展有限公司 | Construction method of annular proving road three-dimensional cambered surface using foam light-weight soil |
| CN104746390A (en) * | 2015-03-13 | 2015-07-01 | 西南交通大学 | Foam lightweight concrete railroad bed structure |
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Application publication date: 20211130 |