LU501449B1 - Surface water infiltration and drainage and integral reinforcement structure for waste dump site and construction method - Google Patents
Surface water infiltration and drainage and integral reinforcement structure for waste dump site and construction method Download PDFInfo
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- LU501449B1 LU501449B1 LU501449A LU501449A LU501449B1 LU 501449 B1 LU501449 B1 LU 501449B1 LU 501449 A LU501449 A LU 501449A LU 501449 A LU501449 A LU 501449A LU 501449 B1 LU501449 B1 LU 501449B1
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- Prior art keywords
- waste
- drainage
- dump site
- retaining wall
- waste dump
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- 239000002699 waste material Substances 0.000 title claims abstract description 156
- 230000008595 infiltration Effects 0.000 title claims abstract description 41
- 238000001764 infiltration Methods 0.000 title claims abstract description 41
- 230000002787 reinforcement Effects 0.000 title claims abstract description 28
- 239000002352 surface water Substances 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 239000004567 concrete Substances 0.000 claims abstract description 29
- 239000004927 clay Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000009413 insulation Methods 0.000 claims abstract description 21
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 14
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 14
- 239000004571 lime Substances 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 64
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 17
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 17
- 239000011378 shotcrete Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 10
- 239000011440 grout Substances 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000009933 burial Methods 0.000 claims description 2
- 238000009991 scouring Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000004568 cement Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 102000015779 HDL Lipoproteins Human genes 0.000 description 2
- 108010010234 HDL Lipoproteins Proteins 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/006—Sealing of existing landfills, e.g. using mining techniques
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a surface water infiltration and drainage and integral reinforcement structure for a waste dump site. A retaining wall is poured at a periphery of the waste dump site, a through drainage hole is provided in a wall body of the retaining wall, a lime-clay platform (with a volume ratio of lime to clay being 3:7) is constructed at a lower portion of the retaining wall, and an upper platform face of the lime-clay platform (with a volume ratio of lime to clay being 3:7) is inclined towards a direction of the waste dump site; several concrete bearing platforms are constructed on a base of the waste dump site; waste in the waste dump site includes several tamped waste layers, an infiltration, drainage and water insulation layer being constructed between adjacent waste layers; several anchor cables matching the concrete bearing platforms for use are constructed on a reinforcement structure; and the anchor cable penetrates the waste layer and the infiltration, drainage and water insulation layer from top to bottom and penetrates the concrete bearing platform at the bottommost portion. The present invention has a simple structure, convenient construction, high efficiency and low manufacturing cost, and effectively achieves stability of surface water infiltration and drainage and integral reinforcement of the waste dump site.
Description
SURFACE WATER INFILTRATION AND DRAINAGE AND INTEGRAL LU501449
[0001] 1. Technical Field
[0002] The present invention relates to the technical field of impervious reinforcement treatment of a tunnel waste dump site, and in particular to a surface water infiltration and drainage and integral reinforcement structure for a waste dump site and a construction method.
[0003] 2. Description of Related Art
[0004] Tunnel waste is crushed stone waste generated by excavation in the tunneling process. The tunnel waste in the tunnel engineering has large amount and is difficult to treat, and therefore, it is necessary to construct a special waste dump site for landfill treatment. Since a major landslide instability accident occurred in the waste dump site in Guangming New Destrict, Shenzhen, the state has paid increasing attention to the stability of the waste dump site and subgrade slope. From a large number of research results, although the crushed stone waste inside the waste dump site is rolled in layers, the crushed stone waste is still in a weak cementation state. Rainfall and surface water infiltration will weaken the rock and soil cementation ability inside the waste dump site, such that there is a potential risk of integral sliding of the waste dump site caused by liquefaction instability of the waste structure.
[0005] At the present stage, conventional methods of slowing down the filling slope, heightening and enlarging the retaining wall, and mounting drainage pipes at the bottom to conduct and drain water, etc. are usually used for ensuring the integral stability of the waste dump site. A drainage and reinforcement method in the prior art LU501449 cannot easily ensure the integral stability of the waste dump site, does not have comprehensive preventive measures, and still has defects in combination with specific protective measures in actual production.
[0006] In view of this, the present invention provides a surface water infiltration and drainage and integral reinforcement structure for a waste dump site in order to prevent integral sliding accidents caused by liquefaction instability of a waste structure by surface water infiltration. A retaining wall is poured at a periphery of the waste dump site, a through drainage hole is provided in a wall body of the retaining wall, a lime-clay platform (with a volume ratio of lime to clay being 3:7) is constructed at a lower portion of the retaining wall, and an upper platform face of the lime-clay platform (with a volume ratio of lime to clay being 3:7) is inclined towards adirection of the waste dump site;
[0007] several concrete bearing platforms are constructed on a base of the waste dump site; waste in the waste dump site includes several tamped waste layers, an infiltration, drainage and water insulation layer being constructed between adjacent waste layers; and
[0008] several anchor cables matching the concrete bearing platforms for use are constructed on a reinforcement structure; and the anchor cable penetrates the waste layer and the infiltration, drainage and water insulation layer from top to bottom and penetrates the concrete bearing platform at the bottommost portion.
[0009] The present invention further provides a construction method for a surface water infiltration and drainage and integral reinforcement structure for a waste dump site. The construction method includes: LUS01449
[0010] (1) treating a base, where
[0011] the site base is dug downwards and tamped at intervals to construct a concrete bearing platform before the waste is discarded, a through hole is reserved in a middle of the concrete bearing platform in a vertical direction, and a rubber hose is pre-buried into the hole;
[0012] (2) constructing a waste retaining wall, where
[0013] the concrete retaining wall is used for retaining and protecting a slope toe of a waste heap, the retaining wall is constructed before the waste is discarded, and a height of the retaining wall is increased along with increase of a height of the waste, so as to keep a top height of the retaining wall higher than a waste top by 0.5 m or above at any time; and several drainage holes are provided at a wall body of the retaining wall;
[0014] (3) mounting drainage pipes, where
[0015] criss-cross drainage pipes are buried at a bottom of the waste dump site, several drainage holes are provided at one side of the drainage pipe away from the site base, block stone is stacked at a periphery of the drainage pipe, and a downstream portion of the drainage pipe extends out of the retaining wall;
[0016] (4) carrying out layered waste discarding operation, where
[0017] the waste is discarded and stacked in layers, each layer of waste is compacted by rolling at a height of 1 m, and a layer of metal mesh is laid and a layer of PVA fiber reinforced gunite is sprayed to serve as an infiltration, drainage and water insulation layer at a top of each layer of waste;
[0018] (5) mounting a hollow grouting anchor cable, where
[0019] after step (4) is completed, a top surface of the waste dump site is leveled, the pre-buried rubber hose is pulled out, the hollow grouting anchor cable is LU501449 mounted, a hole bottom is punched into the hole reserved in the bearing platform at a bottom of the waste dump site, and the anchor cable is grouted and fixed with grout after being mounted; and
[0020] (6) greening a surface layer, where
[0021] plantable soil having a thickness of 60 cm-90 cm covers a top surface of the waste dump site to green a slope surface.
[0022] The method has a simple structure, convenient construction, high efficiency and low manufacturing cost, and effectively achieves stability of surface water infiltration and drainage and integral reinforcement of the waste dump site.
[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments below. The drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered limiting of the present invention. The same components are denoted by the same reference numerals in the whole drawings. In the drawings:
[0024] Fig. 1 is a structural schematic diagram of an integral structure of a waste dump site of the present invention (no concrete bearing platform and anchor cable are included); and
[0025] Fig. 2 is a structural schematic diagram of an integral reinforcement structure for a waste dump site of the present invention (structures of retaining walls, etc. are not included).
DETAILED DESCRIPTION OF THE INVENTION LU501449
[0026] Various exemplary embodiments of the present invention will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the present invention are shown in the figures, it should be 5 understood that the present invention is implemented in various forms and should not be limited by the embodiments described herein. Oppositely, these embodiments are provided to understand the present invention more thoroughly and to fully convey the scope of the present invention to those skilled in the art. It needs to be noted that on the embodiments in the present invention and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the drawings and the embodiments.
[0027] Embodiment 1
[0028] A surface water infiltration and drainage and integral reinforcement structure for a waste dump site is provided. A retaining wall 1 is poured at a periphery of the waste dump site, a through drainage hole 9 is provided in a wall body of the retaining wall 1, a lime-clay platform (with a volume ratio of lime to clay being 3:7) 7 is constructed at a lower portion of the retaining wall 1, and an upper platform face of the lime-clay platform (with a volume ratio of lime to clay being 3:7) 7 is inclined towards a direction of the waste dump site;
[0029] several concrete bearing platforms 2 are constructed on a base of the waste dump site; waste in the waste dump site includes several tamped waste layers 3, an infiltration, drainage and water insulation layer 4 being constructed between adjacent waste layers 3; and
[0030] several anchor cables 6 matching the concrete bearing platforms 2 for use are constructed on a reinforcement structure; and the anchor cable 6 penetrates the waste layer 3 and the infiltration, drainage and water insulation layer 4 from top to LU501449 bottom and penetrates the concrete bearing platform 2 at the bottommost portion.
[0031] Preferably, M10 mortar rubbles are laid within a range of 10 m from a floor of a wall bottom of the retaining wall 1.
[0032] The infiltration, drainage and water insulation layer 4 is formed by spraying a layer of polyvinyl alcohol (PVA) fiber reinforced gunite having a thickness of 10 mm on a metal mesh, and has a strength grade of C40, an impervious grade of P10 and water insulation efficiency of 90% or above. The metal mesh is formed by welding steel bars of ®6 mm, and has a mesh size of 500 mm x 1000 mm, a grid size of 100 mm x 100 mm, and mesh lap joint of 100 mm-200 mm, meshes are connected in a hooking and buckling manner, and an interval between connection points is not greater than 200 mm; and the PVA fiber reinforced gunite has a strength grade of C40, an impervious grade of P10, and a matching ratio as follows: a cement variety is 52.5 ordinary Portland cement, and a cementing material system has total amount of 460 kg/m’, where 276 kg/m’ of cement, 92 kg/m? of fly ash, 92 kg/m? of mineral powder, 730 kg/m? of natural sand, and 1.5 kg/m? of fibers.
[0033] The PVA fiber is a composite fiber for hardening and cracking prevention of concrete produced by Hangzhou Tugiang Engineering Materials Co., Ltd. The fiber material is PVA, and has a length of 6 mm, a diameter of 15 um, density of 1.3 g/cm’, a tensile strength > 1200 MPa, and elongation at break greater than 20%.
[0034] Embodiment 2
[0035] A construction method for a surface water infiltration and drainage and integral reinforcement structure for a waste dump site includes:
[0036] (1) treat a base, where
[0037] before waste is discarded, surface soil of 0.5 m of the base of a whole LU501449 site 1s dug downwards and shoveled and then tamped, concrete bearing platforms having a length, width and height of 0.4 m x 0.4 m x 0.5 m and concrete having a strength grade of C25 are constructed at positions every 2 m x 2 m, a through hole of $40 mm is reserved in a middle of the bearing platform in a height direction, and a rubber hose having high strength is pre-buried in the bearing platform.
[0038] (2) construct a waste retaining wall (retaining wall), where
[0039] the C25 concrete retaining wall is used for retaining and protecting a slope toe of a waste heap, a foundation burial depth is 2 m, a wall height is 4 m-10 m, and when the wall height is changed, in order to improve bearing capacity of the base, lime-clay (with a volume ratio of lime to clay being 3:7) is used for backfilling below a retaining wall foundation to manufacture a lime-clay platform (with a volume ratio of lime to clay being 3:7) having the lowest portion having a thickness of 1 m; an upper platform face of the lime-clay platform (with a volume ratio of lime to clay being 3:7) is inclined towards a direction of the waste dump site; and the waste retaining wall of the waste dump site is constructed in time before the waste is discarded, the whole retaining wall is wider at a top and narrower at a bottom, has a wall body size in linear gradual transition, and has a minimum size not less than 1 m, and a height of the retaining wall is increased along with increase of a height of the waste, so as to keep a wall top higher than a waste top by 0.5 m or above at any time. PVC drainage holes of ¢100 mm having a slope gradient not less than 4% are provided in a wall body of the retaining wall, and an interval between the PVC drainage holes is 2 m x 2 m; and M10 mortar rubbles are laid within a range of 10 m from a floor of a wall bottom of the retaining wall to prevent scouring. Expansion joints are arranged in a wall body of the retaining wall at intervals of 10 m-15 m in a penetrating manner, and has a joint width of 20 mm. LU501449
[0040] (3) mount drainage pipes, where
[0041] criss-cross drainage pipes are buried at the bottom of the waste dump site, four rows of punched corrugated pipes of $800 mm are longitudinally buried, and punched corrugated pipes of $200 mm are transversely arranged at intervals of 5 m; the corrugated pipe is wrapped in non-woven fabric, and before laying, the base is leveled to ensure that a pipe bottom is compact; when the corrugated pipe is mounted, a punching side faces upwards, and the portion without punching is located below; when the corrugated pipes are longitudinally and transversely connected, the corrugated pipe of $200 mm is connected to a middle of the corrugated pipe of $800 mm, such that the drainage pipes are in communication; block stone is stacked around the drainage pipe to prevent damage by the waste; and a downstream portion of the drainage pipe extends out of the retaining wall to drain infiltration water at a waste bottom.
[0042] (4) carry out layered waste discarding operation, where
[0043] waste is discarded and stacked in layers, each layer of waste is compacted by rolling at a height of 1 m, and a layer of metal mesh is laid and a layer of PVA fiber reinforced gunite is sprayed to serve as an infiltration, drainage and water insulation layer at a top of each layer of waste. Specifically, the waste is discarded and stacked in layers, each layer of waste is compacted by rolling at the height of 1 m, a layer of metal mesh is laid and a layer of PVA fiber reinforced gunite having a thickness of 10 mm is sprayed to serve as the infiltration, drainage and water insulation layer at the top of each layer of waste, and the infiltration, drainage and water insulation layer has a strength grade of C40, an impervious grade of P10, and water insulation efficiency of 90% or above;
[0044] the metal mesh is formed by welding steel bars of $6 mm, and has a LU501449 mesh size of 500 mm x 1000 mm, a grid size of 100 mm x 100 mm, and mesh lap joint of 100 mm-200 mm, meshes are connected in a hooking and buckling manner, and an interval between connection points is not greater than 200 mm; and
[0045] the PVA fiber reinforced gunite has a strength grade of C40, an impervious grade of P10, and a matching ratio as follows: a cement variety is 52.5 ordinary Portland cement, a cementing material system has a total amount of 460 kg/m? where 276 kg/m* of cement, 92 kg/m? of fly ash, 92 kg/m? of mineral powder, 730 kg/m? of natural sand, and 1.5 kg/m? of fibers.
[0046] The PVA fiber is a composite fiber for hardening and cracking prevention of concrete produced by Hangzhou Tugiang Engineering Materials Co., Ltd. The fiber material is PVA, and has a length of 6 mm, a diameter of 15 um, density of 1.3 g/cm’, a tensile strength >1200 MPa, and elongation at break greater than 20%.
[0047] (5) mount a hollow grouting anchor cable, where
[0048] after step (4) is completed, a top surface of the waste dump site is leveled, the pre-buried rubber hose 1s pulled out, the hollow grouting anchor cable is mounted, a hole bottom is punched into the hole reserved in the bearing platform at a bottom of the waste dump site, and the anchor cable is grouted and fixed with grout after being mounted. Specifically, after retaining and protecting engineering of the waste dump site is completed and waste discarding is completed, the top surface of the waste dump site is leveled, and in order to drain catchment water within a range of a waste top, the top of the waste dump site is longitudinally and transversely made into a slope having a slope gradient not less than 1%. The pre-buried rubber hose having high strength is pulled out, the hollow grouting anchor cable is mounted, the hole bottom is punched into the hole reserved in the bearing platform at the bottom of LU501449 the waste dump site, and several layers of waste are combined into a thick layer through the anchor cable, so as to prevent the waste dump site from sliding integrally; and
[0049] the hollow grouting anchor cable has a length of 6 m-10 m, and a diameter of 22 mm, and after the anchor cable is mounted, several waste layers are combined into the integral thick layer in time through grout; and the grout is high density lipoprotein (HDL) retarded early-strength grouting material produced by Shandong Huadi Building Science and Technology Co., Ltd. The grout has a water cement ratio of 0.4:1, and grouting pressure as follows: initial pressure of 0.5 MPa-1.0 MPa, and final pressure of 1.5 MPa.
[0050] (6) greening a surface layer, where
[0051] plantable soil having a thickness of 60 cm-90 cm covers the top surface of the waste dump site to green a slope surface; and after the retaining and protecting engineering of the waste dump site is completed and waste discarding is completed, the top surface of the waste dump site is leveled, and plantable soil having a thickness of 60 cm-90 cm covers the top surface of the waste dump site to green a slope, plant grass, and plant trees, etc., so as to reach the standard required by design and local environmental laws and regulations.
[0052] (7) punch a hole to mount an inclinometer, where
[0053] the inclinometer fixed by a guide wheel may monitor displacement changes of soil layers having different depths inside the waste dump site, and master the deformation condition in a side slope in time, so as to ensure side slope treatment engineering and surrounding safety. A YT-ZL-0300x series high-precision electronic 1nclinometer is selected, the electronic inclinometer may slide in an inclinometer pipe,
an actual landfill height of the waste dump site is taken as a standard for punching, the LU501449 inclinometer is mounted to monitor horizontal inclination conditions of different depths of a profile or the whole hole, and is used for observing a horizontal direction change inside soil of the waste dump site, and when obvious trend displacement changes occur and exceed an early warning value, further measures need to be taken to reinforce the waste dump site, so as to ensure integral stability of the waste dump site.
[0054] Comparative Embodiment
[0055] A construction method for surface water infiltration and drainage and integral reinforcement for a waste dump site carries out construction of a waste dump site of a Muzhailing tunnel of a Weiyuan-Wudu expressway under the condition that the method in embodiment 2 is not changed. Waste is discarded and stacked in 6 layers, each layer of waste is compacted by rolling at a height of 1 m, but no layer of metal mesh is laid and no water insulation layer of PVA fiber reinforced gunite is sprayed at a top of each layer of waste; under extreme rainfall weather conditions, surface water infiltration of the waste dump site without the water insulation layer of PVA fiber reinforced gunite sprayed causes loosening of muck inside the waste dump site through on-site actual measurement; and under the condition that several layers of waste are combined into a thick layer without mounting a hollow grouting anchor cable, sliding deformation of internal muck bodies occurs in the waste dump site.
[0056] Apparently, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.
LU501449
Claims (10)
1. A surface water infiltration and drainage and integral reinforcement structure for a waste dump site, wherein a retaining wall (1) is poured at a periphery of the waste dump site, a through drainage hole (9) is provided in a wall body of the retaining wall (1), a lime-clay platform (with a volume ratio of lime to clay being 3:7) (7) 1s constructed at a lower portion of the retaining wall (1), and an upper platform face of the lime-clay platform (with a volume ratio of lime to clay being 3:7) (7) is inclined towards a direction of the waste dump site; several concrete bearing platforms (2) are constructed on a base of the waste dump site; waste in the waste dump site comprises several tamped waste layers (3), an infiltration, drainage and water insulation layer (4) being constructed between adjacent waste layers (3); and several anchor cables (6) matching the concrete bearing platforms (2) for use are constructed on a reinforcement structure, and the anchor cable (6) penetrates the waste layer (3) and the infiltration, drainage and water insulation layer (4) from top to bottom and penetrates the concrete bearing platform (2) at the bottommost portion.
2. The surface water infiltration and drainage and integral reinforcement structure for a waste dump site according to claim 1, wherein the infiltration, drainage and water insulation layer (4) is formed by spraying a layer of polyvinyl alcohol (PVA) fiber reinforced gunite having a thickness of 10 mm on a metal mesh, and has a strength grade of C40, an impervious grade of P10 and water insulation efficiency of 90% or above.
3. The surface water infiltration and drainage and integral reinforcement structure for a waste dump site according to claim 1, wherein M10 mortar rubbles are laid within a range of 10 m from a floor of a wall bottom of the retaining wall (1).
4. A construction method for a surface water infiltration and drainage and integral LU501449 reinforcement structure for a waste dump site, wherein a site base is dug downwards and tamped at intervals to construct a concrete bearing platform before waste is discarded, a through hole is reserved in a middle of the concrete bearing platform in a vertical direction, and a rubber hose is pre-buried in the hole; the waste is discarded and stacked in layers, each layer of waste is compacted by rolling at a height of 1 m, and a layer of metal mesh is laid and a layer of PVA fiber reinforced gunite is spayed to serve as an infiltration, drainage and water insulation layer at a top of each layer of waste; after the waste is discarded, the pre-buried rubber hose is pulled out, a hollow grouting anchor cable is mounted, and a hole bottom is punched into the hole reserved in the concrete bearing platform at a bottom of the waste dump site; and the anchor cable is grouted and fixed with grout after being mounted.
5. The construction method for a surface water infiltration and drainage and integral reinforcement structure for a waste dump site according to claim 4, comprising: (1) treating the base, wherein the site base is dug downwards and tamped at intervals to construct the concrete bearing platform before the waste is discarded, the through hole is reserved in the middle of the concrete bearing platform in the vertical direction, and the rubber hose is pre-buried into the hole; (2) constructing a waste retaining wall, wherein a concrete retaining wall is used for retaining and protecting a slope toe of a waste heap, the retaining wall is constructed before the waste is discarded, and a height of the retaining wall is increased along with increase of a height of the waste, so as to keep a top height of the retaining wall higher than a waste top by 0.5 m or above at any time; and several drainage holes are provided at a wall body of the retaining wall; LU501449 (3) mounting drainage pipes, wherein criss-cross drainage pipes are buried at a bottom of the waste dump site, several drainage holes are provided at one side of the drainage pipe away from the site base, block stone is stacked at a periphery of the drainage pipe, and a downstream portion of the drainage pipe extends out of the retaining wall; (4) carrying out layered waste discarding operation, wherein the waste is discarded and stacked in layers, each layer of waste is compacted by rolling at the height of 1 m, and one layer of metal mesh is laid and one layer of PVA fiber reinforced gunite is sprayed to serve as the infiltration, drainage and water insulation layer at the top of each layer of waste; (5) mounting the hollow grouting anchor cable, wherein after step (4) is completed, a top surface of the waste dump site is leveled, the pre-buried rubber hose is pulled out, the hollow grouting anchor cable is mounted, the hole bottom is punched into the hole reserved in the bearing platform at the bottom of the waste dump site, and the anchor cable is grouted and fixed with grout after being mounted; and (6) greening a surface layer, wherein plantable soil having a thickness of 60 cm-90 cm covers a top surface of the waste dump site to green a slope surface.
6. The construction method for a surface water infiltration and drainage and integral reinforcement structure for a waste dump site according to claim 5, wherein the concrete bearing platform has a length, width and height of 0.4 m x 0.4 m x
0.5 m in step (1); and an interval between the concrete bearing platforms is 2 m x 2 m.
7. The construction method for a surface water infiltration and drainage and integral reinforcement structure for a waste dump site according to claim 5, wherein LU501449 a lime-clay platform (with a volume ratio of lime to clay being 3:7) is arranged below the retaining wall in step (2); an upper platform face of the lime-clay platform (with a volume ratio of lime to clay being 3:7) is inclined towards a direction of the waste dump site; the retaining wall is poured on the lime-clay platform (with a volume ratio of lime to clay being 3:7), a foundation burial depth is 2 m, the retaining wall is wider at a bottom and narrower at a top, and the retaining wall has a wall body size in linear gradual transition, and has a minimum size not less than 1 m.
8. The construction method for a surface water infiltration and drainage and integral reinforcement structure for a waste dump site according to claim 5, wherein M10 mortar rubbles are laid within a range of 10 m from a floor of a wall bottom of the retaining wall in step (2) to prevent scouring.
9. The construction method for a surface water infiltration and drainage and integral reinforcement structure for a waste dump site according to claim 5, wherein after step (6), the construction method further comprises: punching a hole to mount an inclinometer to monitor an inclination condition.
10. The construction method for a surface water infiltration and drainage and integral reinforcement structure for a waste dump site according to claim 5, wherein the top surface 1s made into a slope having a slope gradient not less than 1% after the top surface of the waste dump site is leveled in step (5); and a surface above the plantable soil is made into a slope having a slope gradient not less than 1% after the plantable soil covers the top surface of the waste dump site in step (6).
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| LU501449A LU501449B1 (en) | 2022-01-26 | 2022-01-26 | Surface water infiltration and drainage and integral reinforcement structure for waste dump site and construction method |
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| LU501449A LU501449B1 (en) | 2022-01-26 | 2022-01-26 | Surface water infiltration and drainage and integral reinforcement structure for waste dump site and construction method |
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| LU501449B1 true LU501449B1 (en) | 2022-09-02 |
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Effective date: 20220902 |