CN214940436U

CN214940436U - Vertical seepage-proofing system of refuse landfill

Info

Publication number: CN214940436U
Application number: CN202121096469.1U
Authority: CN
Inventors: 肖明
Original assignee: Shandong Zhonghai Xinke Environmental Technology Co ltd
Current assignee: Shandong Zhonghai Xinke Environmental Technology Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-11-30
Anticipated expiration: 2031-05-21

Abstract

The utility model belongs to the technical field of the landfill prevention of seepage, specifically be a perpendicular seepage prevention system of landfill. The garbage landfill site comprises a garbage landfill site (1), a rock layer (2), a groove (3), an impermeable layer (4) and a filling material (5), wherein a vertical groove is formed in the position, corresponding to the groove (3), of the rock layer (2); the anti-seepage layer (4) is vertically arranged in the groove (3), the bottom end of the anti-seepage layer (4) is inserted into the groove of the rock layer (2), and the top end of the anti-seepage layer (4) is flush with the ground; the anti-seepage layer (4) comprises an anti-seepage film (41) and a composite layer (42), and the composite layer (42) is fixedly connected with the surface of the anti-seepage film (41). The utility model provides a perpendicular prevention of seepage system of landfill has compensatied ordinary perpendicular prevention of seepage secondary and has revealed, the inflexible scheduling problem of construction.

Description

Vertical seepage-proofing system of refuse landfill

Technical Field

The utility model belongs to the technical field of the landfill prevention of seepage, specifically be a perpendicular seepage prevention system of landfill.

Background

There are generally three types of waste disposal, namely incineration, composting and sanitary landfill. The landfill site is a landfill pit dug on the ground, the garbage is buried in the pit, the garbage in the pit can generate leachate, and the leachate flows into the soil and is the main cause of pollution of the garbage in the landfill site; the bottom and the periphery of the pit are made into impermeable layers by adopting an impermeable technology, and finally the pit is sealed to isolate the garbage from the surrounding environment, so that the percolate is prevented from flowing into the soil, and the sanitary landfill is realized; the landfill occupies hundreds of mu, and thousands of tons of garbage are treated per day, and the landfill has low cost and good sanitation degree, so the landfill is widely applied in China. The quality of the impermeable layer of the refuse landfill is the key to whether the sanitary landfill can be realized in the whole refuse landfill.

The seepage prevention of the refuse landfill is generally divided into horizontal seepage prevention and vertical seepage prevention, wherein the horizontal seepage prevention refers to seepage prevention of the landfill bottom; the vertical seepage prevention is to prevent seepage around the landfill or after the landfill is sealed. The operation time of the refuse landfill is dozens of years, the later ecological restoration time is longer, and the problems of an impermeable layer are difficult to avoid; performing anti-seepage treatment on the field bottom by horizontal anti-seepage, laying an anti-seepage layer, and if the anti-seepage layer is broken, repairing the anti-seepage layer at the later stage; the vertical seepage prevention is used for seepage prevention treatment on the periphery of the landfill, if the seepage prevention layer breaks, maintenance can be carried out in the later period, and at present, the vertical seepage prevention is mostly adopted for carrying out later maintenance on the landfill.

The existing later maintenance of the landfill by utilizing vertical seepage prevention generally comprises the steps of forming a vertical groove along the edge of the landfill at the periphery of the landfill, filling seepage prevention materials in the groove, extending the groove to a rock stratum at the bottom of the ground, and forming a closed environment by the rock stratum and the groove to isolate garbage from the surrounding environment; the vertical groove is excavated, the inner filling material is generally a geomembrane, and the geomembrane is easy to be pierced, so that secondary leakage of percolate is caused, and the construction is inflexible.

SUMMERY OF THE UTILITY MODEL

To secondary among the prior art reveal, the inflexible scheduling problem of construction, the utility model provides a perpendicular prevention of seepage system of landfill.

In order to achieve the above object, the utility model adopts the following technical scheme: a vertical seepage-proofing system of a refuse landfill is arranged under the surface of the periphery of the refuse landfill, and the bottom of the refuse landfill is a naturally formed rock layer; the anti-seepage system comprises a groove which is vertical at the periphery of the refuse landfill, the groove is a continuous whole, and the bottom of the groove is communicated with a rock layer; the rock layer is characterized in that a vertical groove is formed in the position, corresponding to the groove, of the rock layer;

the barrier system further comprises a barrier layer; the anti-seepage layer is vertically arranged in the groove, the bottom end of the anti-seepage layer is inserted into the groove of the rock layer, and the top end of the anti-seepage layer is flush with the ground;

the anti-seepage layer comprises an anti-seepage film and a composite layer, and the composite layer is fixedly connected with the surface of the anti-seepage film.

Preferably, the impermeable membrane is a geomembrane, an impermeable geotextile or a composite geomembrane.

Preferably, the composite layer comprises a plurality of polymeric sheets or a water resistant blanket.

Preferably, the composite layer is a waterproof blanket, the waterproof blanket is a bentonite waterproof blanket, and the bentonite waterproof blanket is fixedly connected to the surface of the impermeable membrane.

Preferably, the polymer plate is an XPE plate, an EVE plate or an EPE plate, and a plurality of the polymer plates are fixedly connected on the surface of the impermeable membrane.

Preferably, the anti-seepage device further comprises filling materials, and the filling materials are filled in gaps between two sides of the inner wall of the groove and the anti-seepage layers.

Preferably, the filler is bentonite.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a perpendicular prevention of seepage system of landfill has compensatied ordinary perpendicular prevention of seepage secondary and has revealed, the inflexible scheduling problem of construction.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described as follows: FIG. 1 is a schematic cross-sectional view of a vertical seepage prevention system of a landfill site;

fig. 2 is an enlarged view of a vertical seepage-proofing system A of a refuse landfill.

Description of the drawings: 1, refuse landfill;

2 a rock layer;

3, a groove;

4 an impermeable layer; 41 impermeable film, 42 composite layer,

5, filling material.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings. It should be noted that the following embodiments are described for full understanding of the present invention, and do not limit the present invention, and the present invention may be implemented in other ways than those described herein.

Example 1

As shown in fig. 1 and 2, a vertical seepage prevention system of a refuse landfill is installed under the peripheral surface of the refuse landfill 1, and the bottom of the refuse landfill 1 is a naturally formed rock stratum 2; the anti-seepage system comprises a groove 3 which is vertical at the periphery of the refuse landfill 1, the groove 3 is a continuous whole, and the bottom of the groove 3 is communicated with a rock layer 2; the rock layer 2 is characterized in that a vertical groove is formed in the position corresponding to the groove 3;

the barrier system further comprises a barrier layer 4; the impermeable layer 4 is vertically arranged in the groove 3, the bottom end of the impermeable layer 4 is inserted into the groove of the rock layer 2, and the top end of the impermeable layer 4 is flush with the ground;

the impermeable layer 4 comprises an impermeable membrane 41 and a composite layer 42, and the composite layer 42 is fixedly connected with the surface of the impermeable membrane 41.

The impermeable membrane 41 is a geomembrane, an impermeable geotextile or a composite geomembrane.

The composite layer 42 comprises a plurality of polymeric sheets or flashing.

The composite layer 42 is a waterproof blanket, the waterproof blanket is a bentonite waterproof blanket, and the bentonite waterproof blanket is fixedly connected to the surface of the impermeable membrane 41.

The polymer plates are XPE plates, EVE plates or EPE plates, and a plurality of the polymer plates are fixedly connected on the surface of the impermeable membrane 41.

The anti-seepage device further comprises filling materials 5, and the filling materials 5 are filled in gaps between two sides of the inner wall of the groove 3 and gaps between two sides of the inner wall of the groove and the anti-seepage layers 4.

The filling material 5 is bentonite.

The construction method comprises the following steps:

1. the impermeable membrane 41 is made of a geomembrane, the composite layer 42 is made of a bentonite waterproof blanket, firstly, the geomembrane and the bentonite waterproof blanket are adhered together, a welding edge is reserved, namely, one side of the geomembrane is longer than the bentonite waterproof blanket by a certain distance along the width direction, generally more than 10cm, and the other side of the geomembrane is retracted into the bentonite waterproof blanket by the same distance along the width direction; the adhered geomembrane and the bentonite waterproof blanket form an impervious layer 4, so that the diffusion of the percolate along the periphery of the landfill can be effectively prevented; the rock layer 2 at the bottom of the landfill blocks the diffusion of leachate along the bottom of the landfill.

Then the impermeable layer 4 consisting of the geomembrane and the bentonite waterproof blanket is lifted and put into the groove 3, the bottom of the impermeable layer is extended into the groove of the rock stratum 2, and the top end of the impermeable layer is flush with the ground. The impermeable layer 4 consisting of the geomembrane and the bentonite waterproof blanket enhances the impermeability, reduces the possibility of piercing the geomembrane and is convenient to lift.

Finally, welding the reserved welding edges by using a common thermal welding technology of the geomembrane, and simultaneously filling the filler 5, wherein the filler 5 is bentonite; and filling bentonite in gaps between two sides of the inner wall of the groove 3 and two sides of the inner wall of the groove and the impermeable layer 4. The hoisting, lowering, welding and filling are sequentially and simultaneously carried out. The impermeable layer 4 arranged in the groove 3 along the periphery of the landfill and the underground rock layer 2 form a closed space, so that the diffusion of the percolate is effectively prevented.

2. The anti-seepage film 41 selects the geomembrane, the composite layer 42 selects the XPE plate, and the construction mode is different from the previous construction mode in that one uniform and equidistant XPE plate is fixed on the surface of the geomembrane with good adhesion.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes to be applied in other fields, but all the technical matters of the present invention are not departed from the technical contents of the present invention, and any simple modification and equivalent changes made to the above embodiments according to the technical matters of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A vertical seepage-proofing system of a refuse landfill is arranged under the surface of the periphery of the refuse landfill (1), and the bottom of the refuse landfill (1) is a naturally formed rock layer (2); the anti-seepage system comprises a groove (3) which is vertical at the periphery of the refuse landfill (1), the groove (3) is a continuous whole, and the bottom of the groove (3) is communicated with a rock layer (2); the rock layer (2) is provided with a vertical groove at the position corresponding to the groove (3);

the barrier system further comprises a barrier layer (4); the anti-seepage layer (4) is vertically arranged in the groove (3), the bottom end of the anti-seepage layer (4) is inserted into the groove of the rock layer (2), and the top end of the anti-seepage layer (4) is flush with the ground;

the anti-seepage layer (4) comprises an anti-seepage film (41) and a composite layer (42), and the composite layer (42) is fixedly connected with the surface of the anti-seepage film (41).

2. Vertical seepage control system for refuse landfills according to claim 1, characterised in that the seepage control membrane (41) is a geomembrane, an seepage control geotextile or a composite geomembrane.

3. The vertical landfill containment system of claim 2, wherein the composite layer (42) includes a plurality of polymer sheets or waterproof blankets.

4. The vertical infiltration prevention system for refuse landfill according to claim 3, wherein the composite layer (42) is a waterproof blanket, the waterproof blanket is a bentonite waterproof blanket, and the bentonite waterproof blanket is fixedly connected to the surface of the infiltration prevention film (41).

5. The vertical infiltration prevention system for refuse landfill according to claim 3, characterized in that the polymer plate is XPE plate, EVE plate or EPE plate, and a plurality of the polymer plates are fixedly connected on the surface of the infiltration prevention film (41).

6. The vertical seepage prevention system for the refuse landfill according to any one of claims 1 to 5, further comprising a filling material (5), wherein the filling material (5) is filled in gaps between two sides of the inner wall of the groove (3) and two sides of the inner wall of the groove and the seepage prevention layer (4).

7. Vertical seepage control system for landfill sites according to claim 6, characterized in that the filling material (5) is bentonite.