JP2003020655A - Impervious mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mat member constructed of a thin strong material and provided with improved workability and reliability for applying water cutoff/ sealing processing to a maritime structural body such as a sectioning revetment in a waste landfill. SOLUTION: In construction of the sectioning revetment on a foundation mound 22, an impervious mat 1 is arranged on the lower face of a joint part 30 between caissons 25 and 25 by a predetermined width. When the sectioned inside sectioned by stopper members 31 and 32 is filled with an asphalt mixture 33, the filler is prevented from leaking from a clearance between stones in the foundation mound. The impervious mat 1 is constructed by layering thin mat members with high strength for integrating a reinforcement layer based on a fiber reinforcement layer buried inside and a rubber asphalt layer together, so that the mat member is provided with strength higher than that of a thick asphalt mat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mat member which can be installed as a water-stop or water-impervious layer in a partition revetment such as a managed waste landfill revetment where water may pass through. Regarding

[0002]

2. Description of the Related Art For offshore structures such as quay walls of harbors and partition revetments of reclaimed land, ground improvement work is carried out to strengthen the seabed ground at the construction site, and then the foundation mound is constructed at a predetermined height. After leveling on the foundation mound, caisons are erected and constructed. As the caisson, for example, a method of producing a box-shaped unit made of concrete or the like on land as a unit body and transporting the caisson unit body to the quay wall construction position to sink it is used, for example, for the length of the quay wall. A large number of caisson units are arranged accordingly. In the connection portion of the caisson unit body, in order to prevent the flow of seawater, a material having a water barrier such as an asphalt mixture is filled,
Processing is performed so that no gap is created between the caisson units. Further, in the partition seawall, etc., means for preventing the flow of seawater even in the part of the basic mound is provided,
Water-impermeable materials such as asphalt mats are laid in order to exert the water-impermeable property at the foundation portion.

Examples of the caisson unit include, in addition to the concrete, a hybrid caisson or the like in which a box-shaped steel structure has a peripheral surface coated with concrete of a predetermined thickness. It is used. When constructing a partition revetment using caisson units of any structure, it is necessary to perform treatment to prevent seawater from flowing between the caisson units, the bottom of the caisson, and the gap between the foundation mounds. For that purpose, while constructing the structure on the asphalt mat, the asphalt mat, sheets, etc. are laid without gaps over the landfill side surface of the foundation mound and the predetermined range of the seabed. Is used.

[0004]

However, when a water-blocking material such as an asphalt mat is used in the construction of the above-mentioned marine structure, the mat member has a large weight, so that the entire part having a large area is used. Covering the area with an asphalt mat is a heavy work burden. Therefore, it has been considered to use vinyl sheets or other thin sheets instead of the asphalt mat, but the thin sheets have a drawback that they are easily torn by a drop impact of a landfill stone or the like. There is also a problem with the reliability of the partition wall. In addition, a construction method may be used in which an asphalt mat is not laid on the entire upper surface of the foundation mound, but a side surface on the reclaimed land side of the revetment and a water blocking mat are laid on the foundation mound. Even when it is used, it is necessary to carry out a water shield treatment between the caisson units.

However, when a caisson unit is placed directly on the foundation mound and a water impervious material such as an asphalt mixture is filled between the caisson units, the stone gap in the foundation mound is impervious to water. The inconvenience that the material will flow occurs. Therefore, in order to prevent the water-impervious material from being wasted, it may be possible to arrange a sheet, a mat or the like on the lower surface of the joint. However, when using sheets such as vinyl sheets, there is a problem that they can be easily broken by the pressure when the caisson touches the ground, and if a thick one such as asphalt mat is used, it will not be possible to land on the upper surface of the foundation mound. As a result, when the caisson unit is placed thereon, it leads to a serious problem of being affected by the above-mentioned unevenness.

The present invention is intended to solve the above-described problem of water-blocking treatment, and the mat member is made thin and has high strength, so that the reliability of construction and the water-blocking performance can be effectively exhibited. The purpose is to provide a possible water blocking mat.

[0007]

DISCLOSURE OF THE INVENTION The present invention provides a water-impervious mat that is arranged so as to block the water-passing portion between the foundations or structures of a marine structure and that is provided as a water-impervious layer that closes a gap through which water flows. Regarding In the invention of claim 1 of the present invention,
A rubber asphalt formed by embedding a non-woven fabric layer as a reinforcing layer is formed into a plate shape, and a mat member configured to have a predetermined thickness is used. Correspondingly, an arbitrary number of layers are laminated, and an adhesive having adhesiveness to rubber asphalt is used on the joint surface of the mat member, and the mat member is bonded to an adjacent mat member to form a predetermined area. It is characterized by using. The invention of claim 2 is
When connecting the peripheral portion of the mat member to another adjacent mat member in an overlapping manner, a process of applying two-component reactive rubber asphalt is performed in advance, and after laying at the construction site, the weight member is mounted on the overlapping portion. It is characterized by imparting a pressing action in water.

According to a third aspect of the present invention, the mat member is laid on the lower surface of the connecting portion of the caisson block forming the marine structure so as to have a predetermined width, and water is laid between the caisson blocks. It is characterized in that it is used as a means for receiving the waterproofing material in the lower part of the layer. In the invention of claim 4, the mat member is laid as a water-blocking layer on the reclaimed land side of the revetment partition revetment, and at the connecting portion between the caisson block and the mat member constituting the revetment, a barrier such as an asphalt mixture is shielded. It is characterized in that a water-soluble mixture is cast in a predetermined range and used as a water-blocking material on a partition wall. Claim 5
In the invention, the mat member is laid as a water blocking layer on the reclaimed land side of the revetment partition revetment, and the mat member is laid in a predetermined range of the caisson block and the foundation mound forming the revetment and the seabed ground. The feature is that it exerts the waterproof property inside the landfill partition.

The mat member constructed as described above can exhibit the same strength as a conventional asphalt mat even if it is thinly formed by the rubber asphalt and the reinforcing layer integrated so as to be embedded inside. Yes,
Since it is lightweight, the workability of laying can be exhibited well.
Therefore, it is possible to use one in which an arbitrary number of mat members are superposed and integrated according to the pressure resistance required in the place where the mat member is used. Further, since the water-impervious mat can be constructed as one having an arbitrary area and can be formed as a thin one, it is constructed on the mat member even if it is arranged on a part of the lower surface of the caisson or the like. It does not affect the horizontal condition of the structure. And the water stop for the conventional offshore structures, etc.
As a water blocking mat, it can be used in the same manner as an asphalt mat.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A water-blocking mat will be described with reference to the illustrated example. The example shown in FIG. 1 illustrates the structure of a mat unit body 5 which constitutes a water-impervious mat. The mat unit body 5 has a fiber reinforcement layer 6 made of synthetic fiber or the like as a core, and the fiber reinforcement layer 6 thereof. The rubber asphalt layer 7 is molded to have a predetermined thickness by impregnating the inside of the rubber. A sand grain layer 8 is formed on the upper surface of the mat unit 5.
Is formed to have a predetermined thickness, and a thin sheet 9 is provided on the lower surface to have a thickness of about 3.5 to 5 mm, which is formed as a sheet having an arbitrary width and length. Even when a large number of mat unit bodies 5 are piled up, it is configured so as to have a peeling property without being adhered to each other in the overlapped portion.

The fiber reinforcing layer 6 arranged as a reinforcing member in the rubber asphalt layer 7 is formed by molding a fiber of polyester or the like into a sheet shape and is arranged on the upper surface side of the mat unit 5 and impregnated with the asphalt component. Let A thin rubber asphalt layer may be provided on the upper surface of the fiber reinforcing layer 6 and a thick rubber asphalt layer may be provided on the lower surface thereof to form a mat having a predetermined thickness.
In addition, as the fiber reinforcing layer 6, a mat or sheet using any material as long as it is a synthetic fiber having a property of not being affected by heat when the mat member is formed by impregnating heated asphalt. Can be used. Further, as the sheet 9 provided so as to cover the lower surface of the mat unit body 5, it is possible to use a film member such as polyethylene, but in addition, any film member may be used. As the sand grain layer 8 that is attached so as to cover the upper surface of the
A granular material that is easily available can be used.

When the mat unit 5 is used,
Depending on the pressure received by the mat unit body 5 and the like, a plurality of mat unit bodies may be stacked and integrated to form a water-impervious mat 1 as shown in FIG. When constructing the water-permeable mat 1 shown in FIG. 2,
It is possible to integrate the mat units 5 and 5a by applying rubber asphalt or the like on the overlapping surfaces and stacking them. When the mat units 5 are stacked and integrated,
In addition, use an adhesive such as a two-component reactive type that can adhere any rubber asphalt at room temperature, or
It is also possible to bond the surfaces coated with the adhesive while heating with a heating means such as a propane burner.

Since the mat unit body 5 constituting the water-permeable mat 1 having the above-mentioned structure is a mat unit body in which the rubber asphalt layer 7 is reinforced with the layer of the fiber reinforcing layer 6, a mat like a conventional asphalt mat. Even if it is thin as compared with the member, it can be configured to have the same strength as that of a thick asphalt mat, or to have a greater strength. As a device for testing the strength of the mat member or the like, for example, a test device 10 having a configuration shown in FIG. 3 can be used.
At 0, the support 1 having a cylindrical recess in the center
The sample 14 is supported on the upper surface of the substrate 1 via the sandwiching member 12, and is pressed by the pressing member 13 from above. Then, when the sample 14 is pressed by the pressing member 13 at a predetermined speed, the displacement amount H of deformation of the mat is measured.

The test apparatus 10 having the above-mentioned structure.
When the water-permeable mat 1 was tested by using, the results shown in Table 2 were obtained. The data of the tensile test result of Table 1 and the data of the punching test result of Table 2 are the data tested for the mat member 1 or 5, and the reference value data of Table 3 are the data for the offshore structure. An example of an asphalt mat to be provided for is shown. In addition, although the tensile test results can be carried out for water-impervious mats,
Since it is difficult to perform a tensile test on the asphalt mat, no comparison with an asphalt mat is made, but as shown in Table 1 above, the property of the water-impervious mat 1 shown in this example is asphalt. It was found that even if the thickness of the mat member is about 1/10 of that of the mat member, the mat member can have a high strength.

However, asphalt mats conventionally used in combination with offshore structures have been placed on the foundation mound and are gently deformed by the pressing force in the state where a heavy object such as a caisson is pressed. And conforms to the shape according to the unevenness, and can exert excellent supporting performance. Furthermore, even if an asphalt mat is laid on the surface of the ground or foundation with large unevenness, even if stones or angular waste are dumped, the shape will be maintained without being damaged by the corners of the waste. As a result, the asphalt mat and the water-impervious mat are not simply compared with each other because they have the property of being capable of forming.

[0016]

[Table 1]

[0017]

[Table 2]

[0018]

[Table 3]

As described above, when the mat unit body 5 is used alone, or in the water-blocking mat 1 formed by laminating the mat unit bodies 5, the mat member 5 has good flexibility due to the nature of the mat member. In addition, modified asphalt such as rubber asphalt is a main constituent material, and it has a viscoelastic property peculiar to the modified asphalt, and excellent followability is exhibited even for moderate deformation. Further, since the fiber reinforcing layer 6 impregnated with the rubber asphalt is arranged on the surface side, cracks are not generated even when a rapid bending action is applied. Furthermore, since the asphalt sheet does not have voids formed inside the mat, it can be used as a mat having excellent durability with little deterioration in quality even after long-term use.

When the mat unit 5 constituting the water-permeable mat 1 or the mat unit 5 is used alone,
When the mat unit 5 is shipped from the manufacturing plant,
The width is 1 to 2 m and the length is 10 m or longer. Therefore, when the water-blocking mat 1 is used as a water-blocking sheet for a marine structure, etc., it should have an appropriate size (area) according to the size of the site where the water-blocking sheet is laid and the usage conditions. Required to form. Therefore, when the water-permeable mat 1 having a narrower width and a shorter width than those required by the construction site is connected to form a mat member having a predetermined area, length or width, a connecting means as shown in FIG. 4 is used. be able to.

In the example shown in FIG. 4, the mat unit 5,
5 shows a case where the water-blocking mat 1 having a predetermined width and length is formed by applying and bonding the adhesives 16, 16 to the adhesive surface of No. 5, and the adhesive 16 is
Two-pack reactive rubber asphalt can be used. Further, as the adhesive 16, an adhesive for heat bonding can be used, and a means for applying the adhesive and then applying the adhesive while heating with a burner may be used. The case of creating the wide water-permeable mat 1 has been described in the case of creating the water-permeable mat 1 on land, but by connecting mat units or the like at the construction site of an underwater marine structure, a predetermined area There are also cases where construction is carried out while creating the water-permeable mat 1 having.

The example shown in FIG. 5 is for explaining an example of forming a wide water-permeable mat in water. In this case, as shown in FIG. The one to which the adhesive 16 has been applied is laid on the seabed, and the adhesive surface of the mat unit body 5 to which the adhesive 16 has been applied is overlapped, and then the weight member 17 is placed on the adhesive portion for adhesion. The weight member 17 has a flexibility (deformability) property that can be easily deformed with respect to the unevenness of the ground on which the water-permeable mat is laid, and can uniformly press the connection portion of the mat unit body. However, for example, sand in a bag can be used, but in order to exert the pressing action against the matt adhesive portion well, metal particles with a large specific gravity are put in a bag. It is preferable to use a flexible structure that can be arbitrarily deformed. When a two-component reactive rubber asphalt is used as the adhesive 16, the water-permeable mat 1 which can be connected to the mat units to exert good water-impervious property when placed while being pressed in water for about 24 hours. Can be formed as.

As an example of constructing the water blocking mat 1 having a predetermined width and length as described above in combination with an offshore structure, it can be used as shown in FIG. 6 and thereafter. The example shown in FIG. 6 shows an example of the water blocking mat 1 used for a waste landfill revetment and the like, and the marine structure 20 as a partition revetment for the waste landfill reclaims the construction area of the seabed 21. The ground is improved to form the caisson 25 construction section. The foundation mound 22 is constructed with a predetermined height and width with respect to the construction section, and the upper surface of the foundation mound 22 is leveled to form the installation surface of the caisson 25.
Install 5.

A water-impervious mat 1 is laid on the surface portion of the basic mound 22 which requires water-stop treatment, and the water-impervious mat is provided. At the end of the water-impervious mat 1 on the caisson 25 side, only the mat member is provided. Due to this, it is difficult to carry out water shielding treatment.
Therefore, a mold 26 is installed between the end of the water-permeable mat 1 and the caisson 25, and then a high temperature asphalt mixture 27 is poured into the water-permeable mat 1 at a predetermined thickness to perform construction. The gap between the portion and the caisson 25 can be subjected to a water blocking treatment. As mentioned above, the basic mound 22
After covering the surface of the building with the water-impervious mat 1, dispose of gravel and relatively small rubble stones to build a covering stone layer 23, stabilize the water-impermeable mat 1, and then deal with the disposal of landfill soil, etc. To

The method of constructing and fixing the water-impervious mat 1 shown in FIG. 6 can be applied to the marine structure 20 shown in FIG. It is possible to construct a water barrier layer according to 1. In the example shown in FIG. 7, the side surface of the caisson 25, the side surface of the caisson 25, and a predetermined range of the upper surface of the foundation mound 22 and the upper surface of the seabed 21 are water-blocked on the side of the landfill soil 24 partitioned by the caisson 25. A water-impervious layer is constructed by laying the mat 1. The water-impermeable layer is constructed in the same manner as a water-impermeable layer using a conventional asphalt mat or rubber mat, a vinyl sheet, etc., but as compared with the asphalt mat, it is possible to exhibit strength and durability in the same manner. When the mat 1 is used, the unit weight of the water blocking mat is very light,
The feature that the workability and workability of the water blocking mat 1 can be exhibited well can be exhibited. It should be noted that, for the caisson 25 placed on the foundation mound 22, if a thick asphalt mat is placed between the lower surface of the caisson 25 and the surface of the stone, the caisson 25 is placed. It is needless to say that the stability against the sea waves can be favorably maintained and that the upper surface of the basic mound 22 can also be blocked with water. Furthermore, in the water-stop treatment at the caisson connection (joint portion 30 described later), a concrete block 28 may be arranged on the sea side of the caisson 25 to support the caisson base. Instead of the blocks, it is also possible to build up by stacking multi-legged block members such as arbitrary wave-dissipating blocks.

In addition to the problem of water impermeability at the portion where the caisson is supported by the foundation mound, the water impermeable mat 1 can also be used for the water impermeable treatment at the connection portion of the caisson unit. For example, as shown in FIG. 8, when constructing a quay, the caisson 25 created in a block shape is arranged and constructed as a long quay, but at the joint between the caisson 25, the joint 30 is On the other hand, it is necessary to carry out water stoppage treatment. Therefore, in order to apply the water stop treatment to the joint portion 30 between the caisson 25 ..., Rubber stopper members 31 and 32 are inserted and fixed in the joint portion 30 at a predetermined interval, and the stopper is provided. In the gap between the members 31, 32, an asphalt mixture 3 such as an asphalt mixture.
Fill 3. When the asphalt mixture 33 is filled, there is a void directly under the joint mound 30 in the stone gap of the foundation mound 22. Therefore, by placing the water-permeable mat 1 on the lower surface of the joint portion 30 with a predetermined width and injecting the asphalt mixture 33 in a state of closing the lower surface of the joint portion 30, the asphalt mixture 33 leaks out and wastefully asphalt is generated. Consuming the mixture is the content.

As described above, arranging the water-impervious mat 1 on the lower surface of the joint portion 30 of the caisson 25 facilitates the laying work because the water-impervious mat 1 is very thin. It is possible, and there is no obstacle in setting the level of the adjacent caisson 25. Further, even if the caisson 25 presses on the foundation mound 22, since the strength of the water-impervious mat is large, even if a local pressing action is applied to the corners of the protruding stone of the foundation mound, etc. It is possible to prevent the asphalt mixture 33 injected into the joint portion 30 from leaking from the lower portion without being damaged. . Further, the water-blocking mat 1 arranged on the joint portion 30 can be constructed and constructed to have an arbitrary width, like the conventional asphalt mat, so that it is possible to prevent use of the water-blocking mat in vain. Thus, it is possible to construct and use a necessary area in a necessary area.

The waterproof work using the waterproof mat can be constructed according to the procedure shown in the flow chart of FIG. The example shown in the flow chart shown in FIG. 9 is explained in the example corresponding to FIG. 6, but first, as in step a-1, mat units are overlapped to create the water-permeable mat 1, Step a-
In step 2, it is loaded on a crane ship or a barge and transported to the construction site (step a-3). Then, according to the conditions at the construction site, an adhesive is applied to the end of the mat to be connected in step a-4, and the water-impervious mat is attached to the upper surface of the foundation mound on the seabed using a device such as a crane. After laying (step a-5), a weight member is placed on the overlapping portion of the mat to give a pressing action (step a-6). After that, after curing for one day to bond the overlapping portion, the weight member is removed (step a-7), and then the caisson is installed.

The connection work of the water-permeable mat is repeatedly carried out on the connection end of each water-permeable mat, and the caisson 25 is made on land, floated on the sea, and is constructed on a construction site by a work boat. It is transported to and positioned on the foundation mound, submerged on the foundation defined by the water-blocking mat, and submerged. Then, the joint of the caisson is subjected to a water-stop treatment as shown in FIG. 8 before the step b-1, and then a water-impervious layer is formed over the upper surface of the foundation mound and the base of the caisson. Do the work to build. At the time of constructing the impermeable layer, a formwork is constructed between the base of the caisson and the impermeable mat (step b-1), and as shown in FIG.
The asphalt mixture is injected to carry out the water blocking treatment at the base of the caisson 25 (step b-2). After that,
On the upper surface of the layer of the water blocking mat, as shown in step a-8,
The covering stone layer is applied to the specified thickness to stabilize the foundation of the offshore structure.

In the water-permeable mat, the fiber-reinforced layer 6 provided so as to be embedded in the rubber asphalt layer can be arranged to have an arbitrary thickness.
The conditions such as the thickness of the rubber asphalt layers formed above and below the fiber reinforcing layer 6 can be set in accordance with the conditions for applying the mat member. Further, the water-blocking mat formed by stacking the mat units is a water-blocking mat in which an arbitrary number of mat units are stacked in accordance with the natural conditions received by the water-blocking mat, the load, the pressing force, and the like. And can be configured according to the conditions of the construction site such as the quay.

[0031]

The present invention uses the water-impervious mat configured as described above, and the mat member is formed thin by the rubber asphalt and the reinforcing layer integrated so as to be embedded inside. However, it is possible to exhibit the same strength as conventional asphalt mats, and since it is lightweight, it is possible to exhibit good workability in laying. Therefore, it is possible to use one in which an arbitrary number of mat members are superposed and integrated according to the pressure resistance required in the place where the mat member is used. Further, since the water-impervious mat can be constructed as one having an arbitrary area and can be formed as a thin one, it is constructed on the mat member even if it is arranged on a part of the lower surface of the caisson or the like. It does not affect the horizontal condition of the structure. Then, it can be used as a water-stop / water-shielding mat for conventional marine structures in the same manner as an asphalt mat.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a structure of a mat unit.

FIG. 2 is an explanatory diagram of an example in which mat units are stacked to form a water-impervious mat.

FIG. 3 is an explanatory diagram of a test device for a water-impervious mat.

FIG. 4 is an explanatory diagram of an example in which mat units are connected to form a water blocking mat.

FIG. 5 is an explanatory diagram of an example of connecting a water-permeable mat in the sea.

FIG. 6 is an explanatory diagram of a water shield work extending over the foundation mound and the caisson.

FIG. 7 is an explanatory diagram of a revetment structure of a landfill.

FIG. 8 is an explanatory diagram of a water stop process for a joint portion of a caisson.

FIG. 9 is a flow chart for explaining the steps of the water shield work.

[Explanation of symbols]

1 water-impervious mat, 2 adhesive, 5 mat unit, 6 fiber reinforced layer, 7 rubber asphalt layer, 8 sand grain layer, 9 sheet, 10 test device, 11 support, 12 sandwiching member, 13
Pressing member, 14 Specimen, 16 Adhesive, 17
Weight members, 20 offshore structures, 21 seabed, 22 foundation mounds, 23 coating stone layers, 2
4 Landfill soil, 25 caisson, 26 formwork, 27 asphalt mixture, 30 joints,
31/32 stopper member, 33 asphalt mixture.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Nakano             2-10-9 Akasaka, Minato-ku, Tokyo Sea of Japan             Construction Co., Ltd. F-term (reference) 2D018 BA12

Claims (5)

[Claims] 1. A water-blocking mat, which is arranged as a water-blocking layer that blocks a water-flowing portion between the foundations or structures of a marine structure and blocks a gap through which water flows, wherein a nonwoven fabric layer is reinforced. A rubber asphalt that is embedded as a layer is formed into a plate shape, and a mat member that is configured to have a predetermined thickness is used, and the mat member is optional depending on the pressure of water received by the mat member or the pressing force of the landfill. The above-mentioned mat member is laminated, and an adhesive having adhesiveness to rubber asphalt is used for the joint surface of the mat member, and the mat member is adhered to an adjacent mat member to be formed to have a predetermined area. A waterproof mat to be used. 2. When the peripheral portion of the mat member is overlapped and connected to another adjacent mat member, a process of applying a two-component reactive rubber asphalt is performed in advance, and the mat member is laid on the construction site, and then the overlap portion is attached. 2. The water-impervious mat according to claim 1, wherein a weight member is mounted on the weight member to impart a pressing action in water. 3. A mat member is laid on a lower surface of a connecting portion of a caisson block constituting the offshore structure so as to have a predetermined width, and the mat member is formed between the caisson blocks. The water blocking mat according to claim 1 or 2, which is used as a means for receiving a water blocking material. 4. A water blocking layer on the reclaimed land side of a reclaimed land partition revetment, wherein the mat member is laid, and a water blocking material such as an asphalt mixture is applied to a connecting portion between the caisson block and the mat member which constitutes the revetment. The water impregnating mat according to claim 1 or 2, wherein the mixture having the composition is cast in a predetermined range and used as a water impervious material on a partition revetment. 5. A caisson block and a foundation mound forming the revetment, wherein the mat member is laid as a water blocking layer on the reclaimed land side of the revetment partition revetment,
The water-impervious mat according to any one of claims 1 to 4, wherein the mat member is laid in a predetermined range of the seabed ground so as to exert water-stopping property inside the landfill partition.