CN109252550B - Groundwater seepage prevention structure - Google Patents
Groundwater seepage prevention structure Download PDFInfo
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- CN109252550B CN109252550B CN201811314335.5A CN201811314335A CN109252550B CN 109252550 B CN109252550 B CN 109252550B CN 201811314335 A CN201811314335 A CN 201811314335A CN 109252550 B CN109252550 B CN 109252550B
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- 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
- E02D31/02—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 against ground humidity or ground water
Abstract
The invention discloses an underground water seepage-proofing structure which can perform seepage-proofing treatment on underground water, and avoid the occurrence of unfavorable natural phenomena such as swampiness, salinization, landslide, ground settlement and the like caused by the seepage of the underground water; under the condition of long-time permeation use, the geotextile protective layer protects the geotextile, so that the anti-seepage effect is ensured; the invention has the advantages of reasonability, safety, feasibility and the like, has higher landfill capacity in unit area, lower construction cost, strong adaptive deformation capacity, no pollution to water quality, small engineering quantity and high construction speed, the mutually contacted surfaces of the double-layer geomembranes of the primary impermeable layer form a vacuum oil film, the performance of preventing water from permeating can be greatly improved, and the rapid-setting waterproof agent slurry is injected, so that the grouting and sealing treatment can be carried out on a grouting pumping hole, the stability of the underground impermeable structure can be improved, the invention can ensure the drainage performance of the geotechnical composite drainage network, and the impermeable effect of the dilatation impermeable layer can be improved.
Description
Technical Field
The invention relates to the technical field of underground water, in particular to an underground water seepage-proofing structure.
Background
Ground water (ground water) is water existing in rock gaps below the ground, is water in a saturated aquifer below the ground water surface in a narrow sense, is an important component of water resources, is one of important water sources for agricultural irrigation, industrial and mining and cities due to stable water quantity and good water quality, and can cause unfavorable natural phenomena such as swampiness, salinization, landslide, ground subsidence and the like under certain conditions.
However, the existing underground water in the market has poor seepage-proofing effect, easily causes the seepage of underground water, causes the loss of underground water, even changes to the surrounding environment, and after the seepage-proofing treatment, the geomembrane is easily corroded in long-term use to influence the seepage-proofing effect. Accordingly, those skilled in the art have provided an underground water permeation prevention structure to solve the problems set forth in the above background art.
SUMMERY OF THE UTILITY MODEL
The invention aims to provide an underground water seepage-proofing structure to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an underground water seepage prevention structure, includes prevention of seepage basic unit, natural clay bed course, first barrier layer and dilatation barrier layer, the inside of prevention of seepage basic unit has set gradually natural clay bed course, first barrier layer and dilatation barrier layer from top to bottom, the bottom of natural clay bed course sticiss and is provided with first barrier layer, the bottom of first barrier layer sticiss and is provided with the dilatation barrier layer, its characterized in that, be provided with downwardly extending and extend to the slip casting aspirating hole of double-deck geomembrane up end on the prevention of seepage basic unit, slip casting aspirating hole inner wall upper cover is established fixedly and is provided with the slip casting exhaust tube, double-deck geomembrane is the geosynthetic membrane that sets up at first barrier layer up end, and during the construction, all scribble one deck oil film on the face of mutual contact between the double-deck geomembrane; an air exhaust hole is formed in one geomembrane on the upper portion of the double-layer geomembrane, the air exhaust hole corresponds to and is communicated with the grouting air exhaust pipe, so that the space between the double-layer geomembrane is vacuumized through the grouting air exhaust pipe, a vacuum oil film is formed on the surfaces, in contact with each other, of the double-layer geomembrane, and water is prevented from permeating; after air exhaust of the grouting air exhaust pipe is completed, quick-setting waterproof agent slurry is injected into the grouting air exhaust pipe so as to perform grouting and sealing treatment on the grouting air exhaust hole; be provided with geotechnological composite drainage network in the dilatation barrier, filtration liquid drainage scree is led laid to geotechnological composite drainage network's top, just the fixed drainage scree that prevents that filtration liquid drainage scree from blockking up geotechnological composite drainage network and can treat the drainage and play the drainage network of direction storage effect and prevent stifled support piece.
As a further scheme of the invention: each layer of geomembrane of the double-layer geomembrane is formed by laying a wave-shaped surface structure.
As a further scheme of the invention: the drainage network prevents stifled support piece and includes support ring and support fin, wherein, geotechnological composite drainage network is the three-dimensional netted frame construction who comprises horizontal muscle and vertical muscle, and frame construction's bottom is provided with the water drainage, geotechnological composite drainage network's vertical muscle's top is provided with the support ring, the support ring is the ring structure, and the center is provided with the support ring hole, the outside radial extension of outer circumference of support ring is provided with the support fin that a plurality of circumference arrays were arranged, and is two adjacent the support fin constitutes the water storage guiding gutter, the water storage guiding gutter makes the infiltration flow direction geotechnological composite drainage network.
As a further scheme of the invention: the primary impermeable layer comprises a geosynthetic membrane and a composite liner, the geosynthetic membrane and the composite liner are sequentially arranged in the primary impermeable layer from top to bottom, and the composite liner is tightly pressed at the bottom end of the geosynthetic membrane.
As a still further scheme of the invention: the composite liner comprises a double-layer geomembrane, compacted clay, a geotechnical filter screen and polypropylene geotextile, wherein the double-layer geomembrane, the compacted clay, the geotechnical filter screen and the polypropylene geotextile are sequentially arranged in the composite liner from top to bottom, the compacted clay is tightly pressed at the bottom end of the double-layer geomembrane, the geotechnical filter screen is tightly pressed at the bottom end of the compacted clay, and the polypropylene geotextile is tightly pressed at the bottom end of the geotechnical filter screen.
As a still further scheme of the invention: the dilatation barrier layer includes geotechnique filter screen isolation layer, filtration liquid guide and discharge cobble, geotechnical composite drainage net, geotechnical cloth protective layer, prevention of seepage HDPE geomembrane and supplementary barrier layer, the inside of dilatation barrier layer has set gradually geotechnical filter screen isolation layer, filtration liquid guide and discharge cobble, geotechnical composite drainage net, geotechnical cloth protective layer, prevention of seepage HDPE geomembrane and supplementary barrier layer from top to bottom, the bottom of geotechnical filter screen isolation layer is provided with filtration liquid guide and discharge cobble, the bottom of filtration liquid guide and discharge cobble is provided with geotechnical composite drainage net, the bottom of geotechnical composite drainage net sticiss and is provided with the prevention of seepage HDPE geomembrane, and the bottom of geotechnical cloth protective layer sticiss and is provided with prevention of seepage HDPE geomembrane, and geotechnical cloth protective layer is a component of polyester.
As a still further scheme of the invention: the thickness of the percolate guide and discharge pebbles is not less than 30 cm.
As a still further scheme of the invention: the thickness of the geosynthetic membrane and the anti-seepage HDPE geomembrane is not less than 2 mm, and the thickness of each geomembrane of the double-layer geomembrane is not less than 5 mm.
As a still further scheme of the invention: the grouting pumping holes are uniformly arranged on the seepage-proofing base layer of the underground water seepage-proofing structure in an array mode.
As a still further scheme of the invention: a gap of 1-5mm is arranged between two supporting fins which are opposite on two adjacent supporting rings
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the primary impermeable layer and the dilatation impermeable layer can be used for carrying out impermeable treatment on underground water, so that unfavorable natural phenomena such as swampiness, salinization, landslide and ground settlement caused by the permeation of the underground water are avoided; under the condition of long-time permeation, the geotextile protective layer protects the geotextile, so that the anti-seepage effect is ensured; simultaneously has the advantages of reasonableness, safety, feasibility and the like, and has higher unit area landfill amount, lower construction cost, strong adaptive deformation capability, the invention has no pollution to water quality, small amount of work and high construction speed, the vacuum oil film is formed on the surface of the double-layer geomembrane of the primary impermeable layer, the performance of preventing water from permeating can be greatly improved, the injected quick-setting waterproofing agent slurry can not only carry out grouting and sealing treatment on the grouting pumping hole, but also improve the stability of the underground anti-seepage structure, and simultaneously, the upper end surface of the geotechnical composite drainage net is fixedly provided with a drainage net anti-blocking support which prevents percolate guide and drainage pebbles from blocking the geotechnical composite drainage net and can play a role in guiding and storing water to be drained, the drainage performance of the geotechnical composite drainage network can be ensured, so that the anti-seepage effect of the dilatation anti-seepage layer is improved.
Drawings
Fig. 1 is a schematic structural view of an underground water seepage-proofing structure;
FIG. 2 is a schematic structural view of a primary barrier layer in an underground water barrier structure;
FIG. 3 is a schematic structural view of a composite liner in an underground water seepage prevention structure;
FIG. 4 is a schematic structural view of an expansion impermeable layer in an underground water impermeable structure;
fig. 5 is a schematic structural view of a drainage network anti-blocking support member of an expansion impermeable layer in an underground water impermeable structure.
In the figure: 1. an impermeable base layer; 2. a natural clay cushion layer; 3. a primary barrier layer; 31. geosynthetic membranes; 32. a composite liner; 321. a double-layer geomembrane; 322. compacting clay; 323. a geotechnical filter screen; 324. polypropylene geotextile; 4. expanding the volume of the impermeable layer; 41. an isolating layer of a geotechnical filter screen; 42. leachate drainage pebbles; 43. a geotechnical composite drainage network; 44. a geotextile protective layer; 45. an impermeable HDPE geomembrane; 46. The auxiliary impermeable layer 47, the anti-blocking supporting piece of the drainage network 471, the supporting ring hole 472, the supporting ring 473, the supporting fin 474, the water storage guiding gutter 5 and the grouting air suction hole.
Detailed Description
Referring to fig. 1-5, in the embodiment of the present invention, an underground water seepage-proofing structure includes a seepage-proofing base layer 1, a natural clay cushion layer 2, a primary seepage-proofing layer 3 and an expansion seepage-proofing layer 4, the natural clay cushion layer 2, the primary seepage-proofing layer 3 and the expansion seepage-proofing layer 4 are sequentially disposed inside the seepage-proofing base layer 1 from top to bottom, the primary seepage-proofing layer 3 is tightly pressed at the bottom end of the natural clay cushion layer 2, the expansion seepage-proofing layer 4 is tightly pressed at the bottom end of the primary seepage-proofing layer 3, and the underground water seepage-proofing structure is characterized,
the anti-seepage base layer 1 is provided with a grouting air exhaust hole which extends downwards and extends to the upper end face of the double-layer geomembrane 321, a grouting air exhaust pipe is fixedly sleeved on the inner wall of the grouting air exhaust hole 5, the double-layer geomembrane 321 is a geosynthetic membrane arranged on the upper end face of the primary anti-seepage layer 3, and during construction, the surfaces of the double-layer geomembranes 321, which are in contact with each other, are coated with a layer of oil film;
an air exhaust hole is formed in one geomembrane on the upper portion of the double-layer geomembrane 321, the air exhaust hole corresponds to and is communicated with the grouting air exhaust pipe, so that the space between the double-layer geomembranes 321 is vacuumized through the grouting air exhaust pipe, a vacuum oil film is formed on the surfaces, in contact with each other, of the double-layer geomembranes 321, and water is prevented from permeating;
pumping air to the grouting air exhaust pipe, and after the air pumping is finished, injecting quick-setting waterproof agent slurry into the grouting air exhaust pipe so as to perform grouting and sealing treatment on the grouting air exhaust hole;
be provided with geotechnological composite drainage network in the dilatation barrier layer 4, filtration liquid drainage scree is led laid to geotechnological composite drainage network's top, just the fixed drainage scree that prevents of upper end of geotechnological composite drainage network blocks up geotechnological composite drainage network and can treat the drainage and play the drainage network of direction storage effect and prevent stifled support piece.
In this embodiment, each geomembrane of the double-layer geomembrane 321 is laid in a wave-shaped surface structure.
As shown in fig. 5, the anti-blocking support member of the drainage network comprises a support ring 472 and support fins 473, wherein the geotechnical composite drainage network is a three-dimensional net-shaped frame structure composed of transverse ribs and vertical ribs, the bottom of the frame structure is provided with a drainage channel, the top end of the vertical ribs of the geotechnical composite drainage network is provided with the support ring 472, the support ring is of a circular ring structure, and the center of the support ring is provided with support ring holes 471, the outer circumference of the support ring outwards radially extends to form a plurality of support fins 473 arranged in a circumferential array, and is two adjacent to the support fins which form a water storage water guide groove 474, and the water storage water guide groove enables water seepage to flow to the geotechnical composite.
In this embodiment, as shown in fig. 2-3, the primary impermeable layer 3 comprises a geosynthetic membrane 31 and a composite liner 32, the geosynthetic membrane 31 and the composite liner 32 are sequentially disposed inside the primary impermeable layer 3 from top to bottom, the composite liner 32 is tightly pressed against the bottom end of the geosynthetic membrane 31, the composite liner 32 comprises a double-layer geomembrane 321, compacted clay 322, a geotechnical filter 323 and a polypropylene geotextile 324, the double-layer geomembrane 321 is sequentially disposed inside the composite liner 32 from top to bottom, the anti-seepage soil comprises compacted clay 322, a geotechnical filter screen 323 and polypropylene geotextile 324, wherein the compacted clay 322 is tightly pressed at the bottom end of the double-layer geomembrane 321, the geotechnical filter screen 323 is tightly pressed at the bottom end of the compacted clay 322, the polypropylene geotextile 324 is tightly pressed at the bottom end of the geotechnical filter screen 323, only a small part of groundwater can enter the position of the dilatation anti-seepage layer 4 after the groundwater is subjected to anti-seepage treatment of the primary anti-seepage layer 3.
The bottom end of the primary impermeable layer 3 is tightly pressed and provided with an expansion impermeable layer 4, as shown in fig. 4, the expansion impermeable layer 4 comprises a geotechnical filter screen isolation layer 41, a percolate guide and drainage pebble 42, a geotechnical composite drainage net 43, a geotechnical cloth protection layer 44, an anti-seepage HDPE geomembrane 45 and an auxiliary impermeable layer 46, the expansion impermeable layer 4 is internally provided with the geotechnical filter screen isolation layer 41, the percolate guide and drainage pebble 42, the geotechnical composite drainage net 43, the geotechnical cloth protection layer 44, an anti-seepage HDPE geomembrane 45 and the auxiliary impermeable layer 46 from top to bottom in sequence, the bottom end of the geotechnical filter screen isolation layer 41 is provided with the percolate guide and drainage pebble 42, the bottom end of the percolate guide and drainage pebble 42 is provided with the geotechnical composite drainage net 43, the bottom end of the geotechnical composite drainage net 43 is tightly pressed and provided with the geotechni, the geotextile is protected, the auxiliary impermeable layer 46 is arranged at the bottom end of the impermeable HDPE geomembrane 45 in a pressing mode, the impermeable performance of the impermeable HDPE geomembrane 45 is extremely low, the service life is long, the thickness of the percolate guide and drainage pebbles 42 is not less than 30 cm, the thickness of the geosynthetic membrane 31 and the impermeable HDPE geomembrane 45 is not less than 2 mm, and the thickness of each layer of the double-layer geomembrane 321 is not less than 5 mm.
In a preferred embodiment, the grouting pumping holes 5 are uniformly arranged on the impermeable base layer 1 of the underground water impermeable structure in an array mode. A gap of 1-5mm is provided between two support fins 473 located opposite on two adjacent support rings 472.
The working principle of the invention is as follows: when the underground water needs to be subjected to anti-seepage treatment, the primary anti-seepage layer 3 and the capacity expansion anti-seepage layer 4 are arranged at the bottom of the anti-seepage base layer 1, the underground water can be subjected to anti-seepage treatment through the primary anti-seepage layer 3 and the capacity expansion anti-seepage layer 4, and adverse natural phenomena such as swampiness, salinization, landslide and ground subsidence caused by the infiltration of the underground water are avoided; an air exhaust hole is formed in one geomembrane on the upper portion of the double-layer geomembrane 321, the air exhaust hole corresponds to and is communicated with the grouting air exhaust pipe, so that the space between the double-layer geomembranes 321 is vacuumized through the grouting air exhaust pipe, a vacuum oil film is formed on the surfaces, in contact with each other, of the double-layer geomembranes 321, and water is prevented from permeating; pumping air to the grouting air exhaust pipe, and after the air pumping is finished, injecting quick-setting waterproof agent slurry into the grouting air exhaust pipe so as to perform grouting and sealing treatment on the grouting air exhaust hole; be provided with geotechnological composite drainage network in the dilatation barrier layer 4, filtration liquid drainage scree is led laid to geotechnological composite drainage network's top, just the fixed drainage scree that prevents of upper end of geotechnological composite drainage network blocks up geotechnological composite drainage network and can treat the drainage and play the drainage network of direction storage effect and prevent stifled support piece. In addition, under the condition of long-time permeation, the geotextile protective layer 44 protects the geotextile, the geosynthetic membrane 31, the double-layer geomembrane 321 and the anti-seepage HDPE geomembrane 45 can reduce the permeation of underground water, the anti-seepage performance of the anti-seepage HDPE geomembrane 45 is extremely low, and the anti-seepage HDPE geomembrane is a flexible, non-toxic, harmless and environment-friendly waterproof material, no material can be dissolved at normal temperature, the service life is long, and the anti-seepage effect is ensured; meanwhile, the method has the advantages of reasonableness, safety, feasibility and the like, and is high in unit area landfill amount, low in construction cost, strong in adaptive deformation capacity, free of pollution to water quality, small in engineering amount and high in construction speed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present invention, and the technical solutions and the utility model concepts of the present invention are equivalent to or changed within the scope of the present invention.
Claims (8)
1. The utility model provides an groundwater seepage prevention structure, includes prevention of seepage basic unit (1), the inside of prevention of seepage basic unit (1) has set gradually natural clay bed course (2), first barrier layer (3) and dilatation barrier layer (4) from top to bottom, its characterized in that:
the anti-seepage base layer (1) is provided with a grouting air suction hole which extends downwards and extends to the upper end face of the double-layer geomembrane (321), a grouting air suction pipe is fixedly sleeved on the inner wall of the grouting air suction hole (5), the double-layer geomembrane (321) is a geosynthetic membrane arranged on the upper end face of the primary anti-seepage layer (3), and during construction, the surfaces of the double-layer geomembranes (321) which are in contact with each other are coated with an oil film;
an air exhaust hole is formed in one geomembrane on the upper portion of the double-layer geomembrane (321), the air exhaust hole corresponds to and is communicated with the grouting air exhaust pipe, so that the space between the double-layer geomembranes (321) is vacuumized through the grouting air exhaust pipe, a vacuum oil film is formed on the surfaces, in contact with each other, of the double-layer geomembranes (321), and water is prevented from permeating;
then, exhausting the grouting air exhaust pipe, and after the air exhaust is finished, injecting quick-setting waterproof agent slurry into the grouting air exhaust pipe so as to perform grouting and sealing treatment on the grouting air exhaust hole;
a geotechnical composite drainage net is arranged in the dilatation impervious layer (4), percolate guide and drainage pebbles are paved above the geotechnical composite drainage net, and a drainage net anti-blocking support member which can prevent the percolate guide and drainage pebbles from blocking the geotechnical composite drainage net and can play a role in guiding and storing water to be drained is fixedly arranged on the upper end surface of the geotechnical composite drainage net;
drainage network prevents stifled support piece and includes support ring (472) and support fin (473), wherein, geotechnological composite drainage network is the three-dimensional netted frame construction who comprises horizontal muscle and vertical muscle, and frame construction's bottom is provided with the water drainage, geotechnological composite drainage network's vertical muscle's top is provided with support ring (472), the support ring is the ring structure, and the center is provided with support ring hole (471), the outer circumference of support ring circumference external diameter radial extension is provided with support fin (473) that a plurality of circumference arrays were arranged, and is two adjacent support fin constitutes water storage guiding gutter (474), the water storage water guiding gutter makes the infiltration flow direction geotechnological composite drainage network.
2. A groundwater seepage prevention structure as claimed in claim 1, wherein each geomembrane of the double geomembrane (321) is of a wave profile structure.
3. An underground water seepage-proofing structure according to claim 1, wherein the primary seepage-proofing layer (3) is internally provided with a geosynthetic membrane (31) and a composite liner (32) from top to bottom in sequence;
the composite liner (32) is internally provided with a double-layer geomembrane (321), compacted clay (322), a geotechnical filter screen (323) and polypropylene geotextile (324) from top to bottom in sequence.
4. The underground water seepage-proofing structure according to claim 3, wherein a geotechnical filter screen isolation layer (41), percolate drainage pebbles (42), a geotechnical composite drainage net (43), a geotechnical cloth protection layer (44), a seepage-proofing HDPE geomembrane (45) and an auxiliary seepage-proofing layer (46) are sequentially arranged in the dilatation seepage-proofing layer (4) from top to bottom, and the geotechnical cloth protection layer (44) is a component made of polyester resin.
5. An underground water seepage prevention structure as claimed in claim 4, wherein the thickness of the leachate guiding and draining pebbles (42) is not less than 30 cm.
6. A groundwater seepage prevention structure according to claim 5, wherein the geosynthetic membrane (31) and the seepage-preventing HDPE geomembrane (45) have a thickness of not less than 2 mm, and the double geomembrane (321) has a geomembrane thickness per layer of not less than 5 mm.
7. An underground water seepage-proofing structure according to claim 1, characterized in that the grouting suction holes (5) are uniformly arrayed on the seepage-proofing base layer (1) of the underground water seepage-proofing structure.
8. A groundwater seepage prevention structure as claimed in claim 1, wherein a gap of 1-5mm is provided between two support fins (473) located opposite on two adjacent support rings (472).
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Denomination of invention: A groundwater anti-seepage structure Effective date of registration: 20220107 Granted publication date: 20200728 Pledgee: China Construction Bank Corporation Linyi Luozhuang sub branch Pledgor: LINYI HUI BAO LING IRON Co.,Ltd. Registration number: Y2022980000200 |