JP3585360B2 - Impermeable wall for gutter pipe and method of constructing the same - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement of a water impervious wall for shutting off a water passage around a gutter pipe buried in a dike or the like and a method of constructing the same.
[0002]
[Prior art]
In some cases, river dikes are provided with gutter pipes at the base of the dike to drain the increased water to another river or wastewater treatment plant in order to prevent flooding and breakage of the dike during flooding.
[0003]
As a method for embedding the gutter pipe, a propulsion method is known in which a starting shaft 1A is provided at the base of the embankment 1 as shown in FIG. .
[0004]
However, when the gutter pipe 2 penetrates the embankment 1, water paths W are easily formed along the gutter pipe 2 as shown in FIG.
Therefore, when the gutter pipe 2 is provided, it is necessary to provide the flange-shaped impermeable wall 3 in the middle part.
[0005]
Conventionally, as a method of providing this impermeable wall, the embankment 1 is cut open as shown by the dotted line and a concrete impermeable wall is constructed using a formwork, or the inner wall surface of the ground that can be cut and excavated is used as a formwork as it is. It has been practiced to form a water barrier by injecting cement milk.
[0006]
However, in the case of the above construction method, since the impermeable wall 3 is provided outside the gutter 2, it is necessary to excavate the embankment 1 as shown by the dotted line at the time of installation, and traffic on the embankment during that time is hindered. There was a problem that the construction was also large.
[0007]
Further, since cement milk permeates into the ground, there is a problem that the shape of the impermeable wall tends to be irregular, and there is a problem that the applicable ground is limited.
In order to solve such a problem, the present applicant, when providing the gutter pipe 2 on the embankment 1, arranges a propulsion gutter pipe 2A having a special structure near the center of the propulsion pipe, and after penetrating the pipe, the special pipe The surrounding soil is excavated from the gap of the pipe wall of the propulsion gutter pipe 2A having the structure to form a groove 3A in which the impermeable wall can be arranged from inside the pipe as shown in FIG. 11, and a large number of fan-shaped pieces 3C. And sequentially assembling them to form the impermeable wall 3.
[0008]
As shown in FIG. 12, the fan-shaped piece 3C is made of a donut-shaped disk 3B serving as the impermeable wall 3 and a plurality of radial lines 4-4 concentric with a plurality of radial lines 4-4 including a set of parallel lines 4A. Are assembled by joining a large number of fan-shaped pieces 3C... 3C sequentially as shown in FIG. 12, and a rectangular connection is formed between the remaining parallel edges 4A and 4A. By inserting and connecting the plate 3D from inside the pipe, the impermeable wall 3 is constructed from inside the pipe.
[0009]
[Problems to be solved by the invention]
However, in the case of the above-described method, the assembling work is a work of repeatedly connecting a large number of disassembled pieces 3C... In a narrow pipe, so that the work is considerably severe. In addition, as shown in FIG. There has been a problem that the gap P for inserting the fan-shaped piece 3C gradually becomes narrow, and the welding operation and the insertion operation become difficult.
[0010]
In particular, there is a problem that the work becomes very difficult with a pipe having a diameter which can be finally entered by a person.
The present invention has been made for the purpose of solving the above problems, and has been made for the purpose of providing a gutter pipe impermeable wall in which a gutter pipe can be easily installed when a gutter pipe is provided. Things.
[0011]
[Means for Solving the Problems]
The impermeable wall for a gutter pipe according to claim 1 has a donut shape in which a radial cross section has a U shape on an outer surface of a short tubular core that can be fixed to an inner surface of the gutter tube, and an opening surface is sealed with the short tubular core. A bag body is provided integrally, and the donut-shaped bag body is foldable together with the short tubular core. Further, the donut-shaped bag body has a grout inlet opening on an inner surface of the core and a donut-shaped bag body. An air vent path is formed from the vicinity of the outer peripheral edge to the inner surface of the core.
[0012]
The doughnut-shaped bag, which becomes the mold of the impermeable wall, can be folded small together with the short tubular core, so that it can be easily carried into the pipe, and can be formed at once by expanding the impermeable wall during molding.
[0013]
The method for constructing a gutter pipe impermeable wall according to claim 2 is a construction method using the gutter pipe impermeable wall according to claim 1, wherein the pipe cut section is provided at a portion of the buried gutter pipe where the impermeable wall is installed. And digging the buried ground from the cut portion into a concentric disk shape centered on the gutter pipe, and then carrying the gutter pipe impermeable wall according to claim 1 into the gutter pipe in a folded state. Then, the gutter pipe impervious wall is rolled into the concentric disc-shaped excavated portion from the outer peripheral edge of the donut-shaped bag body, and the short tubular core of the gutter pipe impermeable wall is laid between the cut trough pipes and fixed. Then, grout is injected from the grout inlet while the internal air is being exhausted from the air bleed path to restore and inflate the donut-shaped bag, and after filling, the air bleed path and the grout inlet are sealed. .
[0014]
A special gutter pipe is used as the pipe cutting part of the gutter pipe in the case of a propulsion gutter pipe, and an opening is formed by cutting the pipe from the inside of the pipe when a water impervious wall is newly provided by an existing gutter pipe or the like.
The gutter pipe impermeable wall is restored and inflated by the grout injection pressure, and the air remaining in the donut-shaped bag body at that time is discharged into the pipe from the air vent path.
[0015]
Therefore, the construction is completed only by carrying in the gutter pipe impermeable wall and inflating it with the grout injection pressure.
Further, the grout to be injected is prevented from penetrating into the ground by the donut-shaped bag body, so that it can be applied to the ground having any property.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described.
FIG. 1 is a front view showing an embodiment of a gutter pipe impermeable wall according to claim 1, FIG. 2 is a sectional view, and FIG. 3 is an explanatory view showing a folded state.
[0017]
1 and 2, the gutter pipe impermeable wall 6 has a U-shaped cross section in the radial direction on the outer surface of a short tubular core 7 that can be fixed to the inner surface of the gutter pipe 2, and the opening surface 8A is formed of the short tubular core 7 as shown in FIG. The donut-shaped bag body 8 is integrally provided with the short tubular core 7 and can be folded as shown in FIG. The grout inlet 9 opening to the inner surface of the short tubular core 7 and an air vent path 10 reaching the inner surface of the short tubular core 7 from the vicinity of the inner peripheral outer edge 8B of the donut-shaped bag body are formed.
[0018]
The grout inlet 9 and the air vent path 10 are preferably provided at positions separated by 180 ° as shown in the figure with the short tubular core 7 interposed therebetween.
The short tubular core 7 is made of rubber or the like so that it can be deformed and freely carried into the pipe. The donut-shaped bag body is also made of a deformable material such as a rubber sheet, a rubberized cloth, a waterproofed canvas, or the like. You.
[0019]
Next, a method of constructing a gutter pipe impermeable wall using the gutter pipe impermeable wall will be described.
As shown in FIG. 4, a pipe cutting portion 2 </ b> B is formed at a portion where the impermeable wall 6 of the buried gutter pipe 2 is installed, and the buried ground G is centered on the gutter pipe 2 from the cutting portion 2 </ b> B. Excavation is performed in a concentric disk shape (11 in the figure).
[0020]
Next, the gutter pipe impervious wall 6 is carried into the gutter pipe 2 in a folded state as shown in FIG. 5, and is introduced into the concentric disc-shaped excavation part 11 from the outer peripheral edge 8B of the donut-shaped bag body 8. As shown in FIG. 6, the short tubular core 7 of the gutter pipe impermeable wall 6 is installed and fixed between the cut gutter pipes 2 and 2.
[0021]
At this time, the gutter pipe impervious wall 6 is arranged so that the internal opening 10A of the air vent path 10 is at the top.
Thereafter, as shown in FIG. 7, the grout 12 is injected from the grout inlet 9 while the internal air is exhausted from the air vent path 10 to restore and inflate the donut-shaped bag 8.
[0022]
At this time, the grout 12 is filled while expanding the donut-shaped bag 8, but the donut-shaped bag 8 prevents the dough from penetrating into the ground.
Further, since the inflated donut-shaped bag 8 is pressed against the inner wall of the excavation portion 11, there is no gap between the bag and the inner wall after inflation.
[0023]
Thereafter, as shown in FIG. 8, after filling, the air vent path 9 and the grout inlet 10 are sealed.
In FIG. 8, reference numeral 12 denotes an inner mortar layer for fixing the short tubular core 7 from the inner surface of the tube.
[0024]
This completes the construction of the gutter pipe impermeable wall.
[0025]
【The invention's effect】
As described above, the present invention is configured such that, when arranging a gutter pipe on a levee and then attaching the impermeable wall, or when inserting and forming the impermeable wall into the impermeable wall mounting space excavated from inside the pipe, it is preliminarily foldable. Since it is only necessary to unfold and insert the impermeable wall for the gutter pipe, the assembly work which is a monotonous and repetitive operation as in the related art is not required at all, and the construction of the impermeable wall becomes very easy.
[0026]
Further, since the impermeable wall after the construction can be filled with grout at high pressure in the donut-shaped bag, the impermeable wall has an effect that the strength of the impermeable wall is also excellent.
[Brief description of the drawings]
FIG. 1 is a front view showing one embodiment of the first embodiment.
FIG. 2 is a sectional view taken along line XX of FIG.
FIG. 3 is an explanatory diagram of a folded state.
FIG. 4 is a process explanatory view of a method for constructing a gutter pipe impermeable wall according to claim 2;
FIG. 5 is a process explanatory view of a method for constructing a gutter pipe impermeable wall according to claim 2;
FIG. 6 is a process explanatory view of a method for constructing a gutter pipe impermeable wall according to claim 2;
FIG. 7 is a process explanatory view of the method for constructing a gutter pipe impermeable wall according to claim 2;
FIG. 8 is a process explanatory view of a method for constructing a gutter pipe impermeable wall according to claim 2;
FIG. 9 is an explanatory view of a construction state of a propulsion gutter tube.
FIG. 10 is an explanatory view of a water impervious wall of a propulsion gutter.
FIG. 11 is an explanatory view of a construction state of a propulsion gutter tube.
FIG. 12 is an explanatory view of a structure of a conventional water barrier for a gutter pipe.
[Explanation of symbols]
Reference Signs List 2 gutter pipe 2B pipe cut section 6 gutter pipe impermeable wall 7 short tubular core 8 donut-shaped bag body 8A opening face 8B inner peripheral outer edge of donut-shaped bag body 9 grout inlet 10 air vent path 11 concentric disc-shaped excavation Part 12 grout 13 inner mortar layer G buried ground

Claims (2)

On the outer surface of the short tubular core that can be fixed to the inner surface of the gutter tube, a donut-shaped bag body whose radial cross section is U-shaped and whose opening surface is sealed with the short tubular core is provided integrally, The bag body is foldable together with the short tubular core, and the donut-shaped bag body has a grout inlet opening on the inner surface of the core and an air vent reaching the inner surface of the core from near the inner peripheral outer edge of the donut-shaped bag body. A watertight wall for a gutter pipe, characterized by having a path formed. 2. A pipe cutting section is formed in a portion of the buried gutter pipe where the impermeable wall is installed, and the buried ground is excavated from the cut section into a concentric disk centered on the gutter pipe. Is carried into the gutter pipe in a folded state, and is cut into the concentric disc-shaped excavation portion from the outer peripheral edge of the donut-shaped bag body, and cuts the short tubular core of the gutter pipe impermeable wall. The doughnut-shaped bag is restored and inflated by injecting grout from the grout inlet while discharging the internal air from the air bleeding path, and after filling the air bleeding path and grout injection. A method for constructing a gutter pipe impermeable wall, characterized by sealing the entrance.

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