JP5147616B2 - Construction method of underground wall - Google Patents

Description

  The present invention relates to a technique for building a wall-like body (or a wall-like structure) such as a water-impervious wall or a retaining wall in the ground.

Various techniques for constructing a water shielding wall, a water blocking wall, and a retaining wall in the ground have been proposed.
For example, the ground to be constructed is cut into grooves using a high-pressure jet of solidifying material and / or water, and the in-situ soil and solidifying material are mixed and stirred to create an underground wall or multiaxial kneading. There is a technique for creating an underground wall by mixing and stirring the in-situ soil and the solidified material for each predetermined region while cutting a plurality of cylindrical regions using an apparatus.

However, the conventional technology using a high-pressure jet requires equipment for excavating the construction ground and equipment for injecting solidified material and / or water to the construction ground with the high-pressure jet. There is a problem that the cost for transporting and installing on site increases.
On the other hand, in the prior art using a multi-axis kneading apparatus, the same problem, that is, a multi-axis kneading apparatus, which is a large-scale machine, must be transported to the construction site and installed.
Furthermore, in the case of constructing a water shielding wall by the conventional technique using the above-described high-pressure jet or the conventional technique using a multi-axis kneading device, an underground wall-like body having an unnecessarily high strength is formed by using the conventional technique. This is inconvenient in terms of cost.

As another conventional technique, the ground is cut into a straight line connecting the two guide tubes and the ground between them with a wire saw, and a water-stopping steel plate or sheet material is inserted into the cut portion, and the steel plate or sheet material. The technique which provided the joint in the side part of this is proposed (refer patent document 1).
However, in the related art, it is necessary to process the cutting earth and sand generated at the time of cutting with the plastic cutting tool. In addition, there is a problem that a device for cutting with a plastic cutting tool and a device for inserting a steel plate or a sheet material into a cutting part must be prepared separately. Furthermore, a specific mode for inserting the flexible sheet into the cutting part is not disclosed.
JP 2007-332724 A

  The present invention has been proposed in view of the above-mentioned problems of the prior art, does not require a large-scale device or special device, has a small influence on the environment around the construction site, and is suitable for the application. It aims at providing the construction method of the underground wall-like body which has appropriate strength.

The underground wall-like body construction method of the present invention includes an excavation process for excavating a groove (T) from the ground side of a construction site, and a pedestal (14, 16) at an opening on the ground side of the excavated groove (T). A step of installing, a step of allowing a bag-like member (24, 124) to enter the groove (T) via the gantry (14, 16), and an input mechanism (22) provided on the gantry (14, 16). And filling the filler (F) into the bag-like member (24, 124) that has entered the groove (T) through the frame (T), and into the groove (T) through the gantry (14, 16). In the step of inserting the bag-like member (24), the plurality of sheet-like members (14S, 16S) are caused to enter the groove (T) from the gantry (14, 16), and the gantry (14, 16) or the gantry A plurality of sheet-like members (14S, 16S) are joined in the vicinity of (14, 16) to form a bag-like member (24) and filled Bag-like member filled with (F) a (24, 124) is adapted to construction of wall-shaped body with a plurality disposed in the groove (T) (claim 1).
Here, in the excavation process of excavating the groove (T), it is preferable to excavate the groove (T) using, for example, a backhoe (long arm type backhoe 1).

  Moreover, the construction method of the underground wall-shaped body of the present invention includes an excavation process for excavating a groove (T) from the ground side of the construction site, and a pedestal (14, 16) on the ground side opening portion of the excavated groove (T). ), A step of allowing the bag-like member (24, 124) to enter the groove (T) via the gantry (14, 16), and an input mechanism (22) provided on the gantry (14, 16). In the excavation process of excavating the groove (T), the bag-like member (24, 124) that has entered the groove (T) via A plurality of bag-like members (24, 124) filled with the filler (F) are arranged in the groove (T) by excavating the groove (T) having a length corresponding to the expected length of the power wall. In addition, a plurality of bag-like members (24, 124) filled with the filler (F) are arranged in the groove (T) to build a wall-like body (contract). Section 2).

  And the construction method of the underground wall-shaped body of this invention is the excavation process which excavates a groove | channel (T) from the ground side of a construction site, and a base (14, 16) in the ground side opening part of the excavated groove | channel (T). ), A step of allowing the bag-like member (24, 124) to enter the groove (T) via the gantry (14, 16), and an input mechanism (22) provided on the gantry (14, 16). ) And filling the filler (F) into the bag-like member (24, 124) that has entered the groove (T) via the gantry (14, 16). In the step of inserting the bag-like member (24) into the plurality of sheet-like members (14S, 16S) from the gantry (14, 16) into the groove (T), the gantry (14, 16) Alternatively, a plurality of sheet-like members (14S, 16S) are joined in the vicinity of the gantry (14, 16) to form a bag-like member (24). , Filler bag-like member filled with (F) (24, 124) is adapted to construction of wall-shaped body with a plurality disposed in the groove (T) (claim 3).

Furthermore, the construction method of the underground wall-like body of the present invention includes an excavation process for excavating a groove (T) from the ground side of the construction site, and a pedestal (14, 16) in an opening portion on the ground side of the excavated groove (T). And a bag-like member (24, 124) is inserted into the groove (T) via the gantry (14, 16), and a charging mechanism (22) provided on the gantry (14, 16) is provided. And filling the filler (F) into the bag-like member (24, 124), and in the excavation process for excavating the groove (T), this corresponds to the expected length of the wall-like body to be built A plurality of bag-like members (24, 124) filled with the filler (F) are arranged in the groove (T) and filled with the filler (F). A plurality of bag-like members (24, 124) are arranged in the groove (T) to build a wall-like body (Claim 4).

In the present invention, the boundary (24JS) between the bag-like members (24, 124) arranged adjacent to each other is preferably inclined in the depth direction (the direction of the arrow UD in FIG. 17) (FIG. 17).
Or it is preferable to incline about the horizontal direction (for example, arrow FR direction of FIG. 19) (FIG. 19).
Furthermore, it is preferable that the plurality of bag-like members (24, 124) are arranged alternately (in a staggered manner) in the direction (arrow W direction in FIG. 18) (FIG. 18).

In the present invention, it is preferable to build a wall-like body that acts as a water-impervious wall or a water-impervious body (FIGS. 1 to 21).
In that case, in order to obtain a required water shielding property, it is preferable that either or both of the bag-like member (24, 124) and the filler (F) are made of a material having a water shielding property.
And as a filler (F), it is preferable to use the mixture of these, such as cement, bentonite, milk, mortar, asphalt, etc., and in-situ soil, for example.
If rubber or other elastic material is used as the filler (F), the built wall-like body can be used as the vibration absorbing wall.

In the present invention, it is preferable to arrange a structure (for example, H steel 40) in the bag-like member (24, 124) (Claim 5: FIG. 22).
In that case, it is possible to use the constructed wall-like body as a retaining wall.

  In the present invention, the wall-like body to be built preferably has a depth dimension of about 10 m.

  According to the present invention having the above-described configuration, the excavation process of excavating the groove (T) can be performed using a construction machine such as a backhoe (long arm type backhoe 1). Therefore, unlike the conventional technology using a high-pressure jet and the conventional technology using a multi-shaft kneader, it is not necessary to install a large-scale machine or special machine at the construction site. You can save.

Further, if a plurality of bag-like members (24, 124) filled with the filler (F) are arranged in the groove (T), a wall-like body can be built, so that the construction is easy and the construction cost. Can be reduced.
In addition, the wall-like body constructed according to the present invention is not high in strength as compared with the case where the solidified material is mixed and stirred with the in-situ soil. Therefore, although the strength necessary and sufficient for use as a water-impervious wall is exhibited, the wall-shaped body does not have excessive strength beyond that.

In the present invention, if either one or both of the bag-like member (24, 124) and the filler (F) are made of a material having a water-impervious property, the built wall-like body is necessary as a water-impervious wall. It can exhibit water barrier properties.
Therefore, for example, the contaminated soil can be reliably contained by the water-impervious wall constructed according to the present invention.

  Here, in addition to the filler (F), if a structural material (for example, H steel 40) is disposed in the bag-like member (24, 124) (Claim 5), the wall-like body constructed according to the present invention is It is possible to exert a strength that can be used as a retaining wall.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, the first embodiment will be described with reference to FIGS.
In 1st Embodiment shown in FIGS. 1-19, this invention is used about construction of an underground water-impervious wall.

In FIG. 1, a long arm type backhoe 1 is disposed in the vicinity of the ground (construction ground) on which the underground wall-like body according to the illustrated embodiment is to be built.
Reference GL indicates the ground surface.
In FIG. 1, a groove T is excavated in the construction ground by a backhoe 1. Although not shown, excavated soil generated when the groove T is excavated by the backhoe 1 is temporarily stored on the ground surface GL (reference numeral GS in FIG. 7).

Here, the groove T has, for example, a width direction (W direction in FIG. 1) dimension of 5 m and a depth dimension (dimension indicated by a symbol L) of 10 m.
Although not clearly shown, when the groove T is excavated in a predetermined range by the backhoe 1, in order to prevent the inner wall surface Tw of the excavated groove T from collapsing, for example, bentonite is provided in the groove T. Fill with muddy water.

Next, as shown in FIG. 2, two H steels 12 that are structural members are disposed above the groove T so as to straddle the groove T.
In FIG. 2, the H steel 12 extends in a direction perpendicular to the paper surface. Further, H steel is merely an example, and other structural members can be used.
A gantry 14 is placed on the H steel 12. And as shown in FIG. 3, the mount 16 is provided so that a pair of mount 14 may be joined.
In other words, on the H steel 12, a quadrangular pedestal composed of a pair of gantry 14 and a pair of gantry 16 is placed.

As shown in FIGS. 2 and 3, a reel 14R is provided on the gantry 14, and a sheet-like member 14S is wound around the reel 14R. The winding amount of the sheet-like member 14S on the reel 14R is approximately equal to the depth D of the groove T. For example, a sheet-like member 14S for 10 m is wound around the reel 14R.
As shown in FIG. 3, a reel 16R is also provided on the gantry 16, and a sheet-like member 16S is wound around the reel 16R. The sheet-like member 16S has the same length and material as the sheet-like member 14S. However, the length and material of the sheet-like member 16S can be different from those of the sheet-like member 14S.
As shown in FIG. 3, a rectangular base is provided on the groove T, and the four reels 14 </ b> R, 14 </ b> R, 16 </ b> R, 16 </ b> R are arranged in the four directions of the groove T.
In FIG. 2, reference numeral 22 denotes a closing hopper. The charging hopper 22 will be described later with reference to FIG.

In FIG. 3, there are a total of four joints 18 between adjacent sheet-like members 14S and 16S.
For example, as shown in FIG. 4, the joint portion 18 constitutes a so-called “fastener”.
As will be described later with reference to FIG. 6, when the bag-like member 24 is filled with the filler F, the bag-like member 24 moves below the groove T due to its weight, and the sheet-like members 14S, 16S are reels 14R, 16R. Is further drawn from. Therefore, the gripping portion 18P is relatively lifted to the ground side (in the direction of arrow U in FIG. 4), and the adjacent sheet members 14S and 16S are joined to form a fastener.

Here, the structure of the joining part 18 is not necessarily limited to a fastener as shown in FIG.
For example, as shown in FIG. 5, by joining adjacent sheet members 14S and 16S with a plurality of ring-shaped members 18R, and passing the flexible wire-shaped members 18W through the plurality of ring-shaped members 18R, a plurality of The sheet members 14S and 16S joined by the ring-shaped member 18R can be configured to move along the wire-shaped member 18W.

As shown in FIGS. 2 to 5, the bases 14 and 16 are provided, and the four reels 14R, 14R, 16R, and 16R are arranged in the four directions of the groove T, and the sheet-like members 14S and 16S are disposed to some extent from the reels 14R and 16R. The bag-like member 24 (member constituted by the sheet-like members 14S and 16S) is inserted into the groove T by pulling out and joining the adjacent sheet-like members 14S and 16S at the joint portion 18.
In other words, as the sheet-like members 14S and 16S enter the construction ground, the adjacent sheet-like members 14S and 16S are joined at the joint portion 18, thereby forming the bag-like member 24.
Here, the bottom of the bag-like member 24 may be configured by any one of the four sheet-like members 14S and 16S drawn from the four reels 14R and 16R, for example. Of course, the bottom part of the bag-like member 24 may be constituted by two or three sheet-like members, and the bottom part of the bag-like member 24 may be constituted by joining four sheet-like members 14S and 16S. It is. That is, the configuration of the bottom portion of the bag-like member 24 is not particularly limited.

Although not clearly shown, instead of the sheet-like members 14S and 16S constituting the joining portion 18 as shown in FIG. 4 and FIG. 5, a member configured in a bag shape in advance is inserted into the groove T. It is also possible. When using such a bag-shaped member, it is not necessary to arrange the sheet reel around which the sheet-shaped member is wound in a quadrangular shape above the groove T. What is necessary is just to arrange | position the member which has the function to store in the groove | channel T vicinity.
The sheet-like members 14S and 16S will be described later with reference to FIG.

The sheet-like members 14S and 16S are entered into the construction ground, and the adjacent sheet-like members 14S and 16S are joined at the joint 18 to form the bag-like member 24 in the groove T as shown in FIG. Then, the filling material F is filled into the bag-like member 24 through the charging hopper 22.
As described above, after the bag-like member 24 has entered the groove T, the filling material F is filled into the bag-like member 24 that has entered the groove T. Here, the bag-like member 24 may be filled with the filler F at the same time as the bag-like member 24 enters the groove T.
In other words, the step of filling the bag-like member 24 with the filler F may be performed after the bag-like member 24 has entered the groove T, or the bag-like member 24 is caused to enter the groove T. It can be done at the same time.
Further, when filling the filling material F into the charging hopper 22 and filling the bag-shaped member 24, for example, a step of excavating the groove T in FIG. 1 using a backhoe for backfilling indicated by reference numeral 1A in FIG. The excavated soil generated in (5) can be filled through the charging hopper 22 shown in FIG. However, the specification is not limited to the specification of the backhoe 1A, and for example, manual backfilling, a conveyor (not shown), or the like can be used.
The filler F will be described later.

If the bag-like member 24 is filled with the filler F via the charging hopper 22, the sheet-like members 14S, 16S constituting the bag-like member 24 are reels 14R, 16R by the weight of the filler F in the bag-like member 24. Is further drawn from.
As a result, the bag-like member 24 filled with the filler F is in a state of being in contact with the bottom Tb of the groove T as shown in FIG. 7 from being separated from the bottom Tb of the groove T as shown in FIG. .

As above-mentioned, in 1st Embodiment shown in FIGS. 1-19, the underground water-impervious wall is constructed | assembled. Therefore, the wall-like body constructed in the ground needs to have water shielding properties.
As apparent from FIGS. 6 and 7, the wall-like body built in the first embodiment is composed of the bag-like member 24 and the filler F. Therefore, either the bag-like member 24 or the filler F is made of a material having a water-impervious property, or both the bag-like member 24 (sheet-like materials 14S and 16S) and the filler F have a water-impervious property. If it is made of a material, the wall-like body built in the first embodiment has a water shielding property.
If the filler F is to be water-impervious, for example, a cement-based material may be mixed with excavated soil generated in the excavation process shown in FIG. Not only excavated soil but also so-called “recycled material” mixed with solidifying material that exhibits water shielding properties and filled into bag-like members eliminates the need for processing as industrial waste, so only the cost of processing , Surely reduce the cost.

If the bag-like member 24 (sheet-like material 14S, 16S) is made of a material having a water barrier property (a publicly known and commercially available material can be applied), the filler F does not necessarily require a water barrier property. Alternatively, rubber or other elastic material chips can be used as the filler F.
Of course, it is also possible to use the rubber chip or the fiber-based material as a filler F and a cement-based hardener (solidifying material). When such a mixture is used, since the filler F also exhibits water shielding, the water shielding performance of the built wall-like body is improved.

In the case where the filler F has water shielding properties, it is also possible to use mesh materials (various nets) as the bag-like member 24 (sheet-like materials 14S and 16S).
In other words, when the filler F has water-impervious properties, the bag-like member 24 (sheet-like material 14S, 16S) is not limited to a cloth-like or sheet-like material, and can accommodate the filler F. All materials with strength are applicable.
That is, as the filler F and the bag-like member 24 (sheet-like materials 14S and 16S), a wide range of application examples can be applied, and the material is either the bag-like member 24 or the filler F. As long as both are made of a material having a water barrier property, there is no particular limitation.

If the filling material F is filled in the bag-like member 24 as shown in FIG. 7, the ground-side opening of the bag-like member 24 is closed, and the reels 14R, 16R, the gantry are not shown. 14, 16 and H steel 12 are removed.
The mode of closing the ground-side opening of the bag-like member 24 is not particularly limited, and any one of the four sheet-like members 14S, 16S covers the opening. Can be configured. Of course, you may comprise the lid-like member which consists of 2-3 sheet-like members. Alternatively, the four sheet-like members 14S and 16S can be joined to close the opening of the bag-like member 24.
Here, the ground-side opening of the bag-like member 24 may be opened without being closed. As shown in FIG. 7, the opening of the bag-like member 24 needs to be located above the groundwater level L.

After the filling of the filler F shown in FIG. 7 is completed, the groove T excavated in FIG. 1 is further excavated, and the mounts 14 and 16 are placed on the area (groove T) excavated to the newly excavated depth D. 1 to 7 in which the bag-like member 24 is configured by the sheet-like members 14S and 16S, and the bag-like member 24 is filled with the filler F by being installed. repeat.
A case of performing a so-called “batch type” when “repeating the steps described in FIGS. 1 to 7” will be described with reference to FIGS.
In FIG. 8, in the process described with reference to FIG. 7, the bag-like member 24 is filled with the filler F, the opening of the bag-like member 24 is closed, and the reels 14 </ b> R, 16 </ b> R, the gantry 14, 16, A state in which is removed is shown in the same direction as FIG.
In FIG. 8, the slope on the side where the bag-like member 24 is not disposed in the groove T is indicated by the symbol TS.

From the state shown in FIG. 8, in the step shown in FIG. 9, the slope TS (shown by a dotted line in FIG. 9) in the groove T is changed to the same manner as in FIG. 1, for example, a long arm type backhoe not shown in FIG. Is excavated to the extent indicated by reference numeral TS-1 in FIG.
Here, when there is a possibility that the slope TS-1 of the groove T may collapse, excavation is performed while filling with bentonite mud (not shown).
And as shown in FIG. 10, the new bag-shaped member 24-1 is installed in the groove | channel T, and the filler F (not shown in FIG. 10) is filled.
In the case of performing so-called “batch type”, a predetermined area CA as shown in FIG. 16 or until the construction of a water shielding body to be constructed (or a linear water shielding body to be constructed: see FIG. 15) is constructed. The process of FIGS. 8-10 is repeated until it surrounds (for example, contaminated soil).
If the number of the bag-like members 24 filled with the filler is set in the number corresponding to the water shields to be constructed, the gaps are filled by other methods such as backfilling so that the gaps as indicated by the symbol α in FIG. 10 do not remain. Fill with α.

On the other hand, instead of the so-called “batch type”, after excavating a groove T having a length corresponding to the water shielding body to be constructed, a bag-shaped member filled with a filler is installed in the groove T. FIG. ~ Is shown in FIG.
11 to 14 correspond to modifications of the first embodiment because the so-called “batch type” is not performed.
In such a modified example, as shown in FIG. 11, a groove T having a length corresponding to the water shielding body scheduled for construction is excavated in the construction ground G. As apparent from the comparison with the width direction dimension W of the groove T in FIG. 1, the width direction dimension WL of the groove T excavated in FIG. 11 is much longer.

When the groove T having a length corresponding to the water shielding body to be constructed is excavated, the bag-like member 24 is filled with the filler F and installed in the groove T as shown in FIG.
If the bag-like member 24 is installed in the groove T, the second bag-like member 24-1 is filled with the filler F at a position in close contact with the bag-like member 24 and installed as shown in FIG. To do.
If the second bag-like member 24-1 is installed at a predetermined position in the groove T so as to be in close contact with the bag-like member 24, it is in close contact with the second bag-like member 24-1, as shown in FIG. At the position, the third bag-like member 24-2 is filled with the filler F and installed as shown in FIG.
Thereafter, N pieces of bag-like members having a length corresponding to the water-impervious body to be constructed are arranged in the groove T (N is a natural number: N pieces of bag-like members filled with the filler F), If installed, a water shield is built in the groove T.
If the bag-shaped member 24 filled with the filler is installed in the groove T by the number (N) corresponding to the water shields to be constructed, the gap as indicated by the symbol α in FIG. 14 does not remain. In addition, the gap α is filled by backfilling or other methods.

In the case of the “batch type” of FIGS. 8 to 10 and the first modification of FIGS. 11 to 14, the sheet-like materials 14S and 16S constituting the bag-like member filled with the filler F are mutually It is necessary to select a material with good adhesion.
If the adhesion between the sheet-like materials 14S, 16S constituting the adjacent bag-like members 24 (24-1, 24-2, 24-3...) Is poor, the adjacent bag-like members 24 do not adhere to each other. There is a possibility that the water impermeability at the boundary part may deteriorate.

In addition to selecting a material with good adhesion as the sheet-like material 14S, 16S constituting the bag-like member 24 (24-1, 24-2, 24-3...), Adjacent bag-like members. By arranging 24 as shown in FIG. 17 to FIG. 19, it becomes possible to prevent deterioration of water shielding.
FIG. 17 shows an example of an arrangement that does not deteriorate the water shielding at the boundary between adjacent bag-like members.

In FIG. 17, bag-like members 24I-1 and 24I filled with the filler F are arranged adjacent to each other. Here, a plurality of bag-like members 24I-1 and 24I are arranged in the groove T in the case of the “batch type” of FIGS. 8 to 10 and the first modification of FIGS. Two arbitrary bag-like members adjacent to the bag-like member (filled with material F) are shown.
In FIG. 17, the contact surfaces or boundaries 24JS of the adjacent bag-like members 24I-1 and 24I are inclined with respect to the vertical direction (the direction of the arrow UD in FIG. 17). The boundary 24JS inclined with respect to the direction of the arrow UD in FIG. 17 has a larger area than the case where the boundaries of the adjacent bag-like members 24I-1 and 24I are arranged in the vertical direction. Become. And if the area of the boundary 24JS of adjacent bag-like members 24I-1 and 24I becomes large, it will become difficult for water to pass the boundary 24JS, and water-imperviousness will improve.
Further, since the boundary 24JS is inclined, the so-called “wedge effect” provides an effect that the adjacent bag-like members 24I-1 and 24I are brought into close contact with each other with a large force.

FIG. 18 shows an arrangement that does not deteriorate the water-imperviousness at the boundary between adjacent bag-like members, and an example different from FIG. 17 is shown.
In FIG. 18, three continuous bag-like members 24I-1, 24I, 24I + 1 are arranged. Here, the bag-like members 24I-1, 24I, and 24I + 1 are continuously arranged in the groove T in the case of the “batch type” in FIGS. 8 to 10 and the first modified example in FIGS. These are three bag-like members (filled with the filler F) that are arbitrary bag-like members.

As is apparent from FIG. 18, the three continuous bag-like members 24I-1, 24I, 24I + 1 are alternately arranged in the front-rear direction (the arrow FR direction in FIG. 18).
Then, at the boundary 24JS1 between the adjacent bag-like members 24I-1 and 24I, the bag-like members 24I-1 and 24I overlap in the width direction (the direction of the arrow W in FIG. 18). Further, at the boundary 24JS2 between the adjacent bag-like members 24I1, 24I + 1, the bag-like members 24I1, 24 + I overlap in the width direction (the direction of arrow W in FIG. 18). Therefore, the three continuous bag-like members 24I-1, 24I, 24I + 1 have a bag-like member (water shielding body) reliably in the direction of the arrow W, so that water is not formed.

FIG. 19 is also an arrangement that does not deteriorate the water-imperviousness at the boundary between adjacent bag-like members, and further examples different from FIGS. 17 and 18 are shown.
Also in FIG. 19, as in FIG. 18, three continuous bag-like members 24I−1, 24I, and 24I + 1 are arranged.
However, the boundaries 24JS3, 24JS4 of the bag-like members 24I-1, 24I, 24I + 1 are inclined with respect to the front-rear direction (the arrow FR direction in FIG. 19).
Since the boundaries 24JS3 and 24JS4 are inclined, the area becomes large, and it becomes difficult for water to pass through the boundaries 24JS3 and 24JS4. As a result, the water barrier is improved.
Further, since the boundaries 24JS3 and 24JS4 are inclined, the three consecutive bag-like members 24I-1, 24I, and 24I + 1 are pressed against each other with great force due to the so-called “wedge effect”, so that the water shielding is further improved. improves.

According to the first embodiment shown in FIG. 1 to FIG. 19, when excavating the groove T, it is not necessary to use a large-sized machine such as a multi-axis excavator or a water jet excavator. Groove T can be excavated.
Therefore, when excavating the groove T, the cost of using the equipment is reduced, and the cost of the excavation work itself can be kept low.
Further, the excavation of the groove T and the installation of the bag-like member 24 can be performed in a batch manner, but particularly as shown in FIGS. 11 to 14, the required length (the length of the impermeable wall to be built) If the bag-like members 24, 24-1, 24-2,... Filled with the filler F are continuously installed in a so-called “follow-up” form, the construction period of the water shielding body Can be greatly shortened.

Further, the sheet-like materials 14S and 16S constituting the bag-like member 24 are made of a water-impervious material, the filler F filled in the bag-like member 24 has a water-impervious property, or the sheet-like material If the material of 14S and 16S and the filler F have water-impervious properties, the wall state to be constructed can be provided with a water-impervious amount necessary for a water-impervious wall.
Therefore, the range of material selection is widened, and various materials can be reused. And since the excavated soil generated at the time of excavating the groove T can be filled in the bag-like member 24 as the filler F, the necessity of treating the excavated soil as industrial waste is eliminated.
As a result, it is possible to build an underground wall-like body having water shielding properties at a low cost.

According to the first embodiment, by filling the filling material F into the charging hopper 22, the filling material F is easily and reliably filled into the bag-shaped member 24. The time required for filling is shortened, and the construction period spent for building the water shield is also shortened.
In addition, for example, if rubber or other elastic material is used as the filling material F filled in the bag-like member 24, or if rubber or other elastic material is used as part of the composition of the filling material F, The structure built in the first embodiment shown in FIGS. 1 to 19 also has an effect as a vibration absorber (vibration absorbing wall).

20 and 21 show a second embodiment of the present invention.
In the first embodiment of FIGS. 1 to 19, the bag-like member 24 is configured by joining, for example, four sheet-like members 14 </ b> S and 16 </ b> S at the joint portion 18. On the other hand, in the second embodiment of FIG. 20, a member 124 configured in a bag shape in advance is made to enter the groove T from the outside of the charging hopper 22.
The vicinity of the opening 124 </ b> E of the bag-like member 124 is attached to the charging hopper 22 by a ring-shaped mouth hoop rebar 32.

In the state shown in FIG. 20, the filler F is charged from the charging hopper 22 into the bag-like member 124 through the opening 124E and filled.
Here, when the filling material F is filled in the bag-shaped member 124, the weight acting on the bag-shaped member 124 increases, and the bag-shaped member 124 may be damaged.
On the other hand, in FIG. 20, the bag-shaped member 124 is filled with the filler F, and a plurality of ring-shaped hoop ropes 34. The location ropes 36 are provided to reinforce the strength in the axial direction (arrow UD direction in FIG. 20) of the bag-like member 124 filled with the filler F and swelled into a cylindrical shape.

  Since the ring-shaped hoop rope 34... Suppresses further expansion of the bag-shaped member 124 filled with the filler F into a cylindrical shape outward in the radial direction. Damage due to the radial expansion of 124 is prevented. On the other hand, the location rope 36... Reinforces the strength in the direction of the arrow UD of the bag-shaped member 124 filled with the filler F and swelled in a cylindrical shape. The bottom of the bag-like member 124 is prevented from being damaged by the weight of the filler F.

  Since the plurality of ring-shaped hoop ropes 34... Suppress the expansion of the bag-shaped member 124 outward in the radial direction, the bag-shaped member 124 filled with the filler F as shown in FIG. It is recessed at the place where the hoop ropes 34 are provided. In other words, the region between the hoop ropes 34 of the bag-like member 124 is curved and protrudes outward in the radial direction.

In FIG. 20, the bag-like member 124 is folded so that a plurality of ring-shaped hoop ropes 34 are in contact with each other when not filled with the filler F, although not clearly illustrated. Then, the opening 124 </ b> E is attached to the charging hopper 22.
As the filling material F is filled, the gap between the plurality of ring-shaped hoop ropes 34... Increases from the folded state (not shown) of the bag-like member 124 due to the weight of the filling material F. Then, it extends downward (in the direction of arrow D), and the state shown in FIG. 20 is obtained.
If the filler F is further introduced from the state of FIG. 20, the bottom of the bag-like member 124 filled with the filler F comes into contact with the bottom Tb of the groove T.

In the above description, in the stage before filling with the filler F, the bag-like member 124 is folded (not shown) so that the plurality of ring-shaped hoop ropes 34. The shaped member 124 is attached to the charging hopper 22.
On the other hand, the bag-like member 124 may be attached to the charging hopper 22 so that the bag-like member 124 extends in advance and is in contact with the bottom Tb of the groove T.
Even when the bag-like member 124 is extended from the beginning and is in contact with the bottom Tb of the groove T, the filling material F is filled into the bag-like member 124 via the charging hopper 22 in the same manner.

Hereinafter, until the required length of the water-blocking body to be built is reached in the batch system described in FIGS. 8 to 10 or in the mode described in FIGS. 11 to 14 (see FIG. 15). Alternatively, the bag-like member 124 filled with the filler F is placed in the groove T until it surrounds a predetermined region (see FIG. 16).
Here, as shown in FIG. 21, when the plurality of bag-shaped members 124 filled with the filler F are continuously arranged in the groove T, the plurality of ring-shaped hoop ropes 34. It is preferable that the recessed portion is arranged so as to come into contact with a portion 38 bulging radially outward between the ring-shaped hoop ropes 34 of the adjacent bag-like members 124.
This is because, as shown in FIG. 21, if the recessed portion 34 and the swollen portion 38 are in close contact with each other, the water shielding at the boundary between the adjacent bag-like members 124 is improved.

  Other configurations and operational effects in the second embodiment of FIGS. 20 and 21 are the same as the configurations and operational effects of the first embodiment described with reference to FIGS.

FIG. 22 shows a third embodiment of the present invention.
The first embodiment shown in FIGS. 1 to 19 and the second embodiment shown in FIGS. 20 and 21 are both constructed with a water shielding body or a vibration absorber, but in the third embodiment shown in FIG. A structure that acts as a structure is built in the ground.
In FIG. 22, the bag-like member 24 (124) arranged adjacent to the inside is already filled with the filler F. And the H steel 40 is arrange | positioned in the center part of the bag-shaped member 24 (124).
By arranging the H steel 40 in the center, the earth pressure applied when used as a retaining wall is reliably supported by the H steel 40. In other words, the H steel 40 is disposed in the bag-like member 24 (124) as a structure for supporting earth pressure.

In the third embodiment of FIG. 22, the H steel 40 is arranged at the center so that the applied earth pressure can be supported. Therefore, a plurality of bag-like members 24 (124) are arranged in the groove T and built. The made wall-like body can exhibit the strength required for the earth retaining wall (strength for supporting earth pressure).
In addition, when water-stopping is not required, it is not necessary to use a water-stopping material for the material of the bag-like member 24 (124) and the filler F.

  Other configurations and operational effects in the third embodiment of FIG. 22 are the same as those of the embodiment of FIGS.

  It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.

Process drawing which shows the process of excavating a groove | channel on construction ground in 1st Embodiment in this invention. Process drawing which shows the process of arrange | positioning a roller in square shape above a groove | channel in 1st Embodiment. The top view of the roller arrange | positioned squarely above the groove | channel. The enlarged view which shows the junction part of an adjacent sheet | seat. The perspective view which shows the aspect different from FIG. 4 of the junction part of an adjacent sheet | seat. Process drawing which shows the state which has filled the bag-shaped member with the filler. The process figure which shows the state which filled the bag-shaped member with the filler. Process drawing which shows the state which filled the bag-shaped member with the filler in the same direction as FIG. The process figure which shows the state which excavates the groove | channel T repeatedly, when processing by a batch type. The process figure which shows the state which newly installed the bag-shaped member and filled with the filler when processing by a batch type. The process figure which shows the state which excavated the groove | channel on the construction ground in the modification of 1st Embodiment. Process drawing which shows the state which has arrange | positioned the 1st bag-shaped member in the excavated groove | channel in the modification of 1st Embodiment. Process drawing which shows the state which has arrange | positioned the 2nd bag-shaped member in the excavated groove | channel in the modification of 1st Embodiment. Process drawing which shows the state which has arrange | positioned the 3rd bag-shaped member in the excavated groove | channel in the modification of 1st Embodiment. The top view which shows an example of the impermeable wall constructed | assembled linearly. The top view which shows an example of the impermeable wall constructed so that the predetermined area | region may be surrounded. Explanatory drawing which shows an example of arrangement | positioning of an adjacent bag-shaped member typically. Explanatory drawing which is arrangement | positioning of an adjacent bag-shaped member, and shows typically an example different from what is shown in FIG. Explanatory drawing which is arrangement | positioning of an adjacent bag-shaped member, and shows typically the example different from what is shown in FIG. 14, FIG. Process drawing which shows 2nd Embodiment of this invention typically. Explanatory drawing which shows typically arrangement | positioning of the bag-shaped member which concerns on 2nd Embodiment. The explanatory perspective view showing typically the 3rd embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A ... Backhoe T ... Groove Tw ... Groove inner wall surface TS, TS-1 ... Groove slope 12, 40 ... H steel 14, 16 ... Mount 14R, 14R, 16R, 16R ... reels 14S, 16S ... sheet-like member 18 ... joint 22 ... charging hopper F ... filler F
24, 24-1, 24-2, 24-3, 24I-1, 24I, 24I + 1, 24N, 124 ... bag-like member 24JS, 24JS1, 24JS2, 24JS3 ... boundary 34 ... hoop rope 36 ..Location rope 38 ... swollen area between hoop ropes

Claims (5)

Excavation process of excavating the groove (T) from the ground side of the construction site, a process of installing the gantry (14, 16) in the ground side opening portion of the excavated groove (T), and via the gantry (14, 16) The bag-like member (24, 124) entered into the groove (T) and the bag-like member entered into the groove (T) via the charging mechanism (22) provided on the gantry (14, 16). Filling the member (24, 124) with the filler (F), and inserting the bag-like member (24) into the groove (T) via the gantry (14, 16) The plurality of sheet-like members (14S, 16S) are caused to enter the groove (T) from the gantry (14, 16), and a plurality of sheet-like members (in the gantry (14, 16) or in the vicinity of the gantry (14, 16)) ( 14S, 16S) are joined to form a bag-shaped member (24), and a bag-shaped member (2) filled with the filler (F) (2) , The underground wall-like member, characterized by construction of the wall-shaped body with a plurality disposed within a 124) groove (T) construction method. Excavation process of excavating the groove (T) from the ground side of the construction site, a process of installing the gantry (14, 16) in the ground side opening portion of the excavated groove (T), and via the gantry (14, 16) The bag-like member (24, 124) entered into the groove (T) and the bag-like member entered into the groove (T) via the charging mechanism (22) provided on the gantry (14, 16). The member (24, 124) is filled with a filler (F), and in the excavation step for excavating the groove (T), a groove having a length corresponding to a predetermined length of the wall-like body to be built (T) is excavated, a plurality of bag-like members (24, 124) filled with the filler (F) are arranged in the groove (T), and a bag-like member (F) filled with the filler (F) ( 24, 124) are arranged in the groove (T) to build a wall-like body, and the underground wall-like body construction method. Excavation process of excavating the groove (T) from the ground side of the construction site, a process of installing the gantry (14, 16) in the ground side opening portion of the excavated groove (T), and via the gantry (14, 16) The bag-like member (24, 124) entered into the groove (T) and the bag-like member entered into the groove (T) via the charging mechanism (22) provided on the gantry (14, 16). Filling the member (24, 124) with the filler (F), and inserting the bag-like member (24) into the groove (T) via the gantry (14, 16) The plurality of sheet-like members (14S, 16S) are caused to enter the groove (T) from the gantry (14, 16), and a plurality of sheet-like members (in the gantry (14, 16) or in the vicinity of the gantry (14, 16)) ( 14S, 16S) are joined to form a bag-shaped member (24), and a bag-shaped member (2) filled with the filler (F) (2) , The underground wall-like member, characterized by construction of the wall-shaped body with a plurality disposed within a 124) groove (T) construction method. Excavation process of excavating the groove (T) from the ground side of the construction site, a process of installing the gantry (14, 16) in the ground side opening portion of the excavated groove (T), and via the gantry (14, 16) The bag-like member (24, 124) is inserted into the groove (T) and filled into the bag-like member (24, 124) via the charging mechanism (22) provided on the gantry (14, 16). In the excavation step of excavating the groove (T), the groove (T) having a length corresponding to the predetermined length of the wall-like body to be built is excavated and filled. A plurality of bag-shaped members (24, 124) filled with the material (F) are arranged in the groove (T), and the bag-shaped members (24, 124) filled with the filler (F) are grooved (T). A construction method of underground wall-shaped body, characterized by arranging a plurality of wall-shaped bodies inside. The construction method of the underground wall-shaped body according to any one of claims 1 to 4, wherein the structure (40) is disposed in the bag-like member (24, 124).

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