JP2003340392A - Venting equipment of landfill site and construction method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply construct a rubble holding frame having strong holding force and high water permeability around a venting pipe to enable rubble filling work due to a building machine to achieve the reduction of the execution cost of venting equipment and the enhancement of safety. <P>SOLUTION: The venting equipment of a landfill site is constituted of the vertical venting pipe 5 provided on the ground 4, the parallel cross structure frame 6 stacked so as to surround the periphery of the venting pipe 5, and rubbles 7 charged in the parallel cross structure frame 6. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a degassing facility for a landfill represented by a final disposal site for waste, an embankment site, and the like, and a construction method therefor.

[0002]

2. Description of the Related Art For example, at the final disposal site of waste, there is a structural stability problem due to the infiltration of rainwater into the waste layer, and the permeated water becomes contaminated water and diffuses underground. May pollute water sources. In addition, since methane gas and carbon dioxide are easily generated due to the decomposition of organic substances contained in the waste, the ground surface may be elevated or an explosion accident may occur if there is no escape route for the gas.

Therefore, at the final disposal site, a gas venting equipment is usually installed for draining and venting the permeated water, and the gas venting equipment is vertically installed on the ground. A gas vent pipe consisting of a perforated pipe, a wire mesh frame called a futon basket installed so as to surround the gas vent pipe, and crushed stones filled in the wire mesh frame. (For example, Japanese Patent Laid-Open No. 8-
(See FIG. 4 of Japanese Patent No. 323317).

The degassing pipe is normally connected to a horizontal drainage pipe disposed on the bottom ground of the final disposal site, and the contaminated water flowing from the waste layer into the degassing pipe is drained. Water is collected in the sewage treatment facility via a pipe.

[0005]

In the conventional degassing equipment described above, a wire netted futon basket is used as a holding frame for holding crushed stones around the degassing pipe. Since such a futon basket is lightweight, it has the advantage that it is easy to set itself on the local ground.
Since it is easily deformed out of the plane, there is a drawback that a large amount of crushed stone cannot be thrown into the holding frame made of the futon basket at once with a construction machine such as a backhoe.

Therefore, in the conventional degassing equipment, a worker manually puts crushed stones into a holding frame composed of a futon basket, which requires a great number of man-hours for filling stones into the futon basket. I needed it. In addition, especially in the final disposal site of waste, it is necessary to manually perform the gravel work in a situation where the work environment in which the waste layer is exposed is not so good, and there is a concern about work-related accidents. .

On the other hand, in order to eliminate the above-mentioned inconvenience, for example, a holding frame for holding crushed stones around the gas vent pipe is constituted by a perforated concrete plate or a weir plate made of steel plate. It is possible. However, this may increase the work man-hours for constructing the holding frame on the ground and rather increase the construction cost, and at the perforated weir plate, water flows toward the crushed stone layer due to clogging. Since it becomes difficult, the drainage function of the degassing facility may deteriorate.

In view of the above situation, the present invention makes it possible to easily construct a crushed stone holding frame having a strong holding force and high water permeability around the degassing pipe, and to perform the filling stone work by the construction machine. The purpose is to reduce the construction cost of the degassing equipment and improve the safety.

[0009]

In order to achieve the above object, the present invention takes the following technical means. That is, a degassing facility for a landfill according to the present invention includes a degassing pipe vertically installed on the ground, a double girder structure frame stacked so as to surround the degassing pipe, and a double girder structure frame. And crushed stones filled inside.

In order to construct such a gas venting facility, the gas vent pipes are set upright on the ground, and after stacking the well girder structural frames so as to surround the gas vent pipes,
It suffices to fill the inside of the double-girder structural frame with crushed stones, and finally, to fill the soil on the site ground to bury the double-girder structural frame. At this time, according to the present invention, since the holding frame for holding the crushed stones around the gas vent pipe is constituted by the double girder structure frame, a holding frame that does not deform out of plane at the weight of the crushed stones is constructed. can do. For this reason,
A large amount of crushed stone can be loaded into the double-girder structural frame at one time by a construction machine such as a backhoe, and the stuffed stone work by the construction machine becomes possible.

Further, since the above-mentioned double-girder structural frame can be constructed by simply stacking a pair of parallel girder members which are parallel to each other, the construction itself can be performed very easily.
In the case of the cross girder structure frame, since a large slit is formed between the girder members in the same direction that are vertically adjacent to each other, there is no concern about clogging which is a concern in the case of the above-mentioned perforated dam plate and the like. It is possible to prevent deterioration of the drainage function of the degassing equipment.

In the degassing equipment according to the present invention, it is preferable to form positioning protrusions protruding in the vertical direction at both longitudinal ends of each girder member constituting the double girder structure frame. If such a positioning protrusion is formed, the relative positions of vertically adjacent girder members can be positioned relative to each other, and the work of stacking the double girder structure frame can be made simpler.

Further, in the gas venting equipment according to the present invention, through holes of rod-shaped members for connecting vertically overlapping beam members to each other may be formed at an intersecting portion of beam members constituting the double beam structure frame. preferable. If such through holes are formed, it is possible to connect the beam members that overlap in the vertical direction to each other simply by inserting the rod-shaped member into the through holes, and the fixing work between the members forming the double beam structure frame can be performed. It becomes easy.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The degassing facility 1 of this embodiment is installed at the final disposal site for wastewater for draining and degassing the permeated water. As shown in FIG. 3, the disposal site has a constant layer thickness. It is constructed by landfilling a soil cover layer 3 on the landfilled waste layer 2.

The degassing equipment 1 of the present embodiment has a degassing pipe 5 vertically installed on the ground 4 of the final disposal site.
And a girder structure frame 6 that is stacked so as to surround the gas vent pipe 5 and crushed stone 7 that is filled inside the girder structure frame 6. The gas vent pipe 5 is
It consists of a perforated fume tube or a water-permeable foam concrete tube.

The gas vent pipe 5 communicates with a horizontal drain pipe (not shown) arranged on the bottom ground of the final disposal site, and vents gas from the waste layer 2 (see FIG. 3). The contaminated water flowing into the pipe 5 is collected in the sewage treatment facility via the drainage pipe. The double girder structure frame 6 is, as shown in FIG.
It is constructed by sequentially stacking a pair of parallel beam members 8 upward, and in the present embodiment,
Since all the girder members 8 having the same shape are used, the plane shape of the double girder structure frame 6 is almost square.

Each girder member 8 constituting the double girder structure frame 6 is
It is made of reinforced concrete and has reinforcing reinforcing bars extending in the longitudinal direction inside. Each longitudinal end portion of each girder member 8 is formed in a T-shape in the lateral direction, and thereby positioning protrusions 9 projecting in the vertical direction are provided at both longitudinal end portions. Further, a through hole 10 penetrating in the vertical direction is formed at an intersecting portion of each girder member 8 constituting the double girder structure frame 6, and the through holes 10 of the girder members 8 overlapping in the vertical direction are made of a reinforcing bar or the like. By inserting a rod-shaped member (not shown), it is possible to connect the beam members 8 that are vertically overlapped with each other.

Next, with reference to FIG. 3, a method of constructing the degassing equipment 1 having the above construction will be described. First, FIG.
As shown in (a), by newly connecting the gas vent pipe 5 to the existing gas vent pipe 5A already buried in the ground 4, the gas vent pipe 5 is vertically arranged on the ground 4. The girder material 8 is assembled so as to surround the gas vent pipe 5 in such a manner that the gas vent pipe 5 is surrounded, and the double girder structure frame 6 is piled up by this.

After that, as shown in FIG. 3 (b), the crushed stones 7 are filled inside the double girder structure frame 6 by using a construction machine 12 such as a backhoe, and as shown in FIG. The embankment 13 is applied (the material of the embankment 13 may be waste for forming the waste layer 2 or normal earth and sand for forming the covering layer 3). ),
The double girder structure frame 6 may be embedded.

At this time, according to the gas venting equipment 1 of the present embodiment, the holding frame for holding the crushed stones 7 around the gas venting pipe 5 is constituted by the cross girder structure frame 6,
It is possible to construct a holding frame that does not deform out of plane with the weight of the crushed stone 7. Therefore, a large amount of crushed stone can be put into the double girder structure frame 6 at one time by the construction machine 12 such as a backhoe, and the construction machine 12 can perform the stuffing operation.

Further, since the above-mentioned cross girder structural frame 6 can be constructed by simply stacking a pair of parallel girder members 8 which are parallel to each other, the construction of the cross girder structural frame 6 itself can be performed very easily, and In this case, since a large slit is formed between vertically adjacent beam members 8 in the same direction, there is no concern about clogging in the case of a perforated dam plate, etc. It is possible to prevent deterioration of the drainage function.

The present invention is not limited to the above-described embodiment. For example, the degassing equipment of the present invention is used not only for the final disposal site of waste but also for landfill sites such as embankment landfills. be able to.

[0023]

As described above, according to the present invention,
Since the girder structure frame is used as a holding frame for holding crushed stones around the gas vent pipe, a crushed stone holding frame with strong holding power and high water permeability can be easily constructed around the gas vent pipe. be able to. For this reason, it becomes possible to carry out the filling stone work in the holding frame by the construction machine, and it is possible to reduce the construction cost of the degassing equipment and improve the work safety.

[Brief description of drawings]

FIG. 1 is a perspective view of a degassing facility for a landfill according to the present invention.

FIG. 2 (a) is a plan view of a double-girder structural frame, and FIG. 2 (b) is a side sectional view of the same structural frame (a sectional view taken along the line AA of FIG. 2 (a)).

FIG. 3 is an explanatory view showing a procedure for constructing a degassing facility.

[Explanation of symbols] 1 degassing equipment 4 ground 5 degassing tube 6 double girder structure frame 7 crushed stone 8-digit material 9 Positioning protrusion 10 through holes 13 embankments

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Osamu Takenaka             2-5-25 Tomoda-cho, Nada-ku, Kobe City Stock Association             Company Ito-Yogyo (72) Inventor Kazumasa Onishi             2-5-25 Tomoda-cho, Nada-ku, Kobe City Stock Association             Company Ito-Yogyo (72) Inventor Shuno Shiro             2-5-25 Tomoda-cho, Nada-ku, Kobe City Stock Association             Company Ito-Yogyo (72) Inventor Takeo Kamishiro             2-5-25 Tomoda-cho, Nada-ku, Kobe City Stock Association             Company Ito-Yogyo F-term (reference) 2D043 CA04 DA10 EB06                 4D004 AA46 AB10 AC07 BB03 CB50

Claims (4)

[Claims] 1. A gas vent pipe (5) standing vertically on the ground (4), and a double girder structure frame (6) stacked so as to surround the gas vent pipe (5), A degassing facility for a landfill, comprising: a crushed stone (7) filled inside a double-girder structural frame (6). 2. The landfill according to claim 1, wherein positioning girders (9) projecting in the vertical direction are formed at both longitudinal ends of each girder material (8) constituting the double girder structure frame (6). Ground degassing equipment. 3. A through hole (10) of a rod-shaped member for connecting vertically overlapping beam members (8) to each other is formed at an intersecting portion of beam members (8) constituting the double beam structure frame (6). The degassing facility for a landfill according to claim 1 or 2. 4. A method for constructing a degassing facility for a landfill, which includes the following steps (a) to (d). (A) First step of vertically arranging a gas vent pipe (5) on the ground (4) (b) Stacking a double girder structure frame (6) so as to surround the gas vent pipe (5) Two steps (c) The third step (d) of filling crushed stones (7) into the inside of the well structure frame (6) The earth (4) is filled with earth (13) to form the above structure frame (6). Fourth step of burying