CN109469056B

CN109469056B - Sanitary landfill liner layer assembled anchoring structure

Info

Publication number: CN109469056B
Application number: CN201811620249.7A
Authority: CN
Inventors: 李明飞; 常远; 刘国新; 冯枭铭; 杜国斌; 赵亮
Original assignee: Shenyang University of Technology
Current assignee: Shenyang University of Technology
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2023-09-29
Anticipated expiration: 2038-12-28
Also published as: CN109469056A

Abstract

The invention relates to a novel assembled anchoring structure for a sanitary landfill liner layer, and belongs to the technical field of environmental protection. The side slope of the refuse landfill is provided with a lining layer, the lining layer is specifically a middle impermeable film and geotextiles at two sides, a glass fiber reinforced plastic anchoring shell is arranged at the top end or the middle platform of the side slope and is fixed in an anchoring groove through a precast concrete pile, and the lining layer is folded in the glass fiber reinforced plastic anchoring shell and is fixed by transversely inserting an anchoring body. The glass fiber reinforced plastic anchoring body is trapezoid, the middle part is provided with a perforated partition board, and the upper part is provided with broken stones. The anchoring structure is prefabricated, the components can be manufactured in a standardized mode, and the functions of collecting, guiding and draining percolate are achieved.

Description

Sanitary landfill liner layer assembled anchoring structure

Technical Field

The invention relates to an anchor structure for a liner layer of a municipal refuse sanitary landfill, and belongs to the technical field of environmental protection.

Background

With the development of national economy, the urban level is improved, and the generation amount of urban household garbage is rapidly increased. There are three main final disposal methods for municipal domestic waste: sanitary landfill, composting and incineration. Among them, sanitary landfill is the most commonly used garbage disposal technology in the world at present. On the basis of scientific site selection, the method adopts necessary site protection treatment means and a reasonable landfill structure to furthest reduce and eliminate the influence of garbage on the environment, in particular to the pollution of underground water. In recent years, many cities are successively built in large landfill sites.

In urban sanitary landfills, a liner system must be provided to prevent the infiltration of leachate into the ground and the resulting soiling of the ground water. In the landfill process, garbage is layered and segmented for landfill, due to continuous accumulation and continuous compression of garbage and the action of a landfill operation vehicle, a tensile force is formed in a liner layer, and the liner system may lose the original function, so that an anchoring area is generally arranged at the top end of a side slope or a platform of a segmented side slope to prevent the phenomenon.

The backing layer of the refuse landfill is anchored by adopting a trench anchoring system, and a rectangular section is mostly adopted, and the edges of the geomembrane and the protective fabric are folded and folded in the trench and fixed by cement concrete pouring. The traditional trench anchoring system needs to be reinforced on the side wall and the bottom surface of the trench in the construction process, the engineering quantity is large, the concrete pouring on the lining layer is long in curing period, and if the lining layer is damaged under the concrete anchoring body, the maintenance and the reinforcement are difficult. It has certain limitations in terms of functionality and practicality.

Disclosure of Invention

The invention aims to: the invention provides a novel assembled anchoring structure for a sanitary landfill liner layer. The method can solve or improve the problems of large engineering quantity, long construction period, difficult maintenance and reinforcement and the like of the traditional groove anchoring system.

The technical scheme is as follows:

sanitary landfill liner layer assembled anchor structure, its characterized in that: the structure is arranged on a side slope of a refuse landfill; comprises a lining layer covering the side slope;

the lining layer comprises a middle impermeable film and geotextile layers at two sides;

the middle section of the side slope is provided with a middle platform;

a glass fiber reinforced plastic anchoring shell is buried at the middle platform; the lining layer is folded into the glass fiber reinforced plastic anchoring shell and is attached to the inner wall;

the glass fiber reinforced plastic anchoring shell is of a trapezoid cross section, the bottom corners are rounded corners, and the top of the glass fiber reinforced plastic anchoring shell is provided with edges parallel to the middle platform;

the glass fiber reinforced plastic anchoring shell is internally provided with a glass fiber reinforced plastic anchoring body, and the liner layer is clamped between the glass fiber reinforced plastic anchoring shell and the glass fiber reinforced plastic anchoring body;

the middle position in the glass fiber reinforced plastic anchor body is provided with a horizontal perforated baffle plate, and broken stones are filled above the perforated baffle plate.

The pit bottom for placing the glass fiber reinforced plastic anchoring shell is provided with a vertical concrete anchor pile; the glass fiber reinforced plastic anchor shell is fixed at the top end of the concrete anchor pile through the expansion bolts and the rubber gasket.

The glass fiber reinforced plastic anchoring shell is narrow at the upper part and wide at the lower part, the width of the bottom is 1000mm, and the height is 800mm; the bottom is provided with a groove which provides space for the expansion bolt cap and keeps the inner bottom surface of the glass fiber reinforced plastic anchoring shell free of protrusions.

The glass fiber reinforced plastic anchoring body is trapezoid, the width of the bottom is 880mm, the width of the upper part is 600mm, and the particle size range of broken stone is 5-20 mm.

The concrete anchor pile has a pile length of 2.5m and a diameter of 20cm, the bottom is conical, and the upper end is provided with a preformed hole.

The thickness of the glass fiber reinforced plastic anchoring shell is 25mm. The thickness of the glass fiber reinforced plastic anchoring body is 15mm.

The advantages and effects:

the novel assembled anchoring structure for the sanitary landfill liner layer can be prefabricated in factories, constructed in an assembled mode on site, and parts are manufactured in a standardized mode, so that the working efficiency can be improved, and the construction period can be shortened. On the premise of meeting the anchoring technical requirement, the problems of large engineering quantity, long construction period, difficult maintenance and reinforcement and the like of the traditional groove anchoring system can be solved. In addition, the novel assembled anchoring structure of the sanitary landfill liner layer has the functions of collecting, guiding and draining percolate besides the anchoring function, so that the treatment efficiency of the percolate of the landfill can be improved, and the whole layout of the landfill is scientific, reasonable, safe and reliable.

Description of the drawings:

FIG. 1 is a schematic view of an assembled anchor structure for a sanitary landfill liner layer;

FIG. 2 is a detailed view of the glass fiber reinforced plastic anchor shell;

FIG. 3 is a detailed view of the glass fiber reinforced plastic anchor;

the drawing is marked:

1, a side slope; 2, an impermeable film; 3 geotextile layers; 4, an intermediate platform; 5, a glass fiber reinforced plastic anchoring shell; 6, expanding bolts; 7, a rubber gasket; 8, concrete anchor piles; 9, a glass fiber reinforced plastic anchoring body; 10 perforated separator.

The specific embodiment is as follows:

the invention is further described below with reference to the accompanying drawings: as shown in fig. 1, a groove is dug at the top end or the middle platform of the side slope, a prefabricated concrete anchor pile is driven into the bottom of the groove, and then a glass fiber reinforced plastic anchor shell is fixed at the upper end of the concrete anchor pile through an expansion bolt and a rubber pad. And backfilling grooves on two sides of the anchoring shell to be flat on the top surface. The lining layer material lower geotextile, the seepage-proof geomembrane and the upper geotextile are sequentially folded in the glass fiber reinforced plastic anchoring shell, the glass fiber reinforced plastic anchoring body is installed in a transverse insertion mode, and broken stone is filled in the perforated partition plate in the anchoring body.

As shown in fig. 2 and 3, the anchoring shell and the anchoring body are made of glass fiber reinforced plastic materials, and the steel has the advantages of high strength and corrosion resistance. The cross section of the two parts is trapezoidal, the top is narrow and the bottom is wide, the bottom width of the anchoring shell is 1000mm, the height is 800m, the bottom width of the anchoring body is 880mm, the upper width is 600mm, and the lining layer is fixed through the characteristics that the two parts are tightly combined and can not rotate relatively.

The bottom of the glass fiber reinforced plastic anchoring shell is provided with a groove, so that a space is provided for the bolt cap of the expansion bolt, the inner bottom surface of the anchoring shell is kept flat and free of protrusions, and the installation of the anchoring body is not affected. The middle of the glass fiber reinforced plastic anchoring body is provided with a perforated baffle plate, the upper part is filled with broken stone, the grain diameter range is 5-20 mm, percolate permeates into the anchoring body through the broken stone layer, is pumped and discharged at a proper position to enter a conveying pipeline, and finally is subjected to purification treatment.

The length of the concrete anchor pile is 2.5m, the diameter is 20cm, the bottom is conical, construction piling is facilitated, and the upper end is provided with a reserved hole, so that the expansion bolt is convenient to insert. The longitudinal row spacing of the concrete anchor piles along the anchor shell can be determined according to factors such as the stress of the lining layer.

Claims

1. Sanitary landfill liner layer assembled anchor structure, its characterized in that: the structure is arranged on a side slope (1) of a refuse landfill; comprises a lining layer covering the side slope (1);

the lining layer comprises a middle impermeable film (2) and geotextile layers (3) at two sides;

the middle section of the side slope (1) is provided with a middle platform (4);

a glass fiber reinforced plastic anchoring shell (5) is buried at the middle platform (4); the lining layer is folded into the glass fiber reinforced plastic anchoring shell (5) and is attached to the inner wall;

the glass fiber reinforced plastic anchoring shell (5) is of a trapezoid cross section, the bottom angle is a round angle, and the top is provided with an edge parallel to the middle platform (4);

a glass fiber reinforced plastic anchoring body (9) is arranged in the glass fiber reinforced plastic anchoring shell (5), and a liner layer is clamped between the glass fiber reinforced plastic anchoring shell (5) and the glass fiber reinforced plastic anchoring body (9);

a horizontal perforated partition board (10) is arranged in the middle position inside the glass fiber reinforced plastic anchoring body (9), and broken stone is filled above the perforated partition board (10);

the pit bottom for placing the glass fiber reinforced plastic anchoring shell (5) is provided with a vertical concrete anchor pile (8); the glass fiber reinforced plastic anchoring shell (5) is fixed at the top end of the concrete anchor pile (8) through an expansion bolt (6) and a rubber gasket (7);

the glass fiber reinforced plastic anchoring shell (5) is narrow at the upper part and wide at the lower part, the bottom is 1000mm in width and 800mm in height; the bottom is provided with a groove, so that a space is provided for the bolt cap of the expansion bolt (6), and no protrusion is arranged on the inner bottom surface of the glass fiber reinforced plastic anchoring shell (5);

the glass fiber reinforced plastic anchoring body (9) is trapezoid, the bottom width is 880mm, the upper width is 600mm, and the particle size range of broken stone is 5-20 mm.

2. The sanitary landfill liner layer fabricated anchoring structure according to claim 1, wherein: and the concrete anchor pile (8) is 2.5m long and 20cm in diameter, the bottom is conical, and the upper end of the concrete anchor pile is provided with a preformed hole.

3. The sanitary landfill liner layer fabricated anchoring structure according to claim 1, wherein: the thickness of the glass fiber reinforced plastic anchoring shell (5) is 25mm.

4. The sanitary landfill liner layer fabricated anchoring structure according to claim 1, wherein: the thickness of the glass fiber reinforced plastic anchor body (9) is 15mm.