JP3877513B2 - Water stop structure at the entrance in the Ace Mall method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water stop structure of an entrance part in an ace molding method.
[0002]
[Prior art]
The Ace Mole method is a method that uses a propulsion machine (propulsion leading device) to inject mud into the excavated soil of the natural ground, turn it into mud, and pump it to the ground. In other words, the propulsion machine (propulsion leading device) installed in the ground is pushed by the main pusher while the pipes for the piping are sequentially followed, and then propelled into the ground. The mud drainage is excavated while mud material is ejected to make mud, and this mud drainage is discharged to the rear end of the machine through the concave mud drain passage groove provided on the outer peripheral wall of the propulsion machine. In the middle of the machine, it is taken into the machine and is discharged to the outside through resistance through the earth pipe installed in the machine and the pipe for piping.
[0003]
Conventionally, an entrance part for preventing the outflow of earth and sand, groundwater, etc. generated when the propulsion machine starts and arrives has been provided on a steel wall (residence wall).
[0004]
[Problems to be solved by the invention]
However, the conventional entrance section does not always achieve a sufficient water stop effect when the propulsion machine starts and reaches.
[0005]
An object of the present invention is to provide a water stop structure of an entrance part in the ace small method, which can prevent outflow of earth and sand, groundwater and the like generated when the propulsion machine starts and reaches in the ace small method.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is an ace molding method using a propulsion machine having a mud drainage passage groove having a concave cross section in the longitudinal direction of the outer peripheral wall, which occurs when the propulsion machine starts and reaches. In the water stop structure of the entrance that prevents the outflow of earth and sand, groundwater, etc.
The entrance part is
An entrance box installed on the wall of a vertical shaft on the natural mountain side and having an opening hole through which a propulsion machine passes;
Entrance packing, which is installed in front of this entrance box and is composed of a plurality of packings having opening holes through which the propulsion machine passes,
This entrance packing is composed of an entrance member provided with a packing presser that suppresses the bulge caused by the following gas bag,
In the entrance packing, a gas bag which swells by gas filling and seals the mud drainage passage groove along the concave wall surface of the mud drainage passage groove of the propulsion machine is passed through the opening hole. The water stop structure of the entrance part in the ace small construction method was adopted, which was provided in a state facing the mud drainage passage groove with a concave cross section of the machine.
[0007]
Therefore, since this gas bag can be in contact with the concave wall surface of the mud discharge passage groove of the propulsion machine independently and seal the mud discharge passage groove, the propulsion machine Can effectively prevent outflow of earth and sand, groundwater, etc. generated at the time of departure and arrival.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an entrance member used in a water stop structure according to the present invention. 1A is a schematic perspective view of an entrance box, FIG. 1B is a schematic perspective view of a first packing, FIG. 1C is a schematic perspective view of a second packing, and FIG. 1D is a perspective view of a third packing. (E) is a schematic view of a gas bag, and (F) is a schematic perspective view of a packing presser.
[0009]
In FIG. 1, reference numeral 1 denotes an entrance box that is installed on the wall of a shaft on the natural ground side a and has an opening hole 101 through which a propulsion machine passes. Reference numeral 2 denotes an entrance packing which is installed in front of the entrance box 1 and has an opening hole through which the propulsion machine passes. This entrance packing 2 is installed on the front side of the entrance box 1 and includes a first packing 210 made of natural soft rubber material that prevents outflow of earth and sand, groundwater, etc. generated when the propulsion machine starts and reaches, A second packing 220 that is installed in front of the first packing 210 and made of a soft vinyl chloride sheet that protects the first packing 210, and a third packing that is made of silicon rubber installed in front of the second packing 220. 230. In addition, 211, 221, and 231 are opening holes through which the propulsion machine passes, respectively, and the opening holes 211, 221, and 231 are the maximum of the propulsion machine in order to secure a hermetic sealing structure when the propulsion machine passes through. The aperture is larger than the outer diameter.
[0010]
Reference numeral 3 denotes a steel plate packing presser that suppresses the swelling caused by the gas bag 4 installed in the entrance packing 2. The gas bag 4 of this embodiment is configured by a parasol type gas bag (rubber balloon) including a tip portion 41 that starts to swell and a rod-shaped portion 42. Reference numeral 301 denotes an opening hole into which the gas bag 4 is inserted and installed and through which the propulsion machine can pass.
[0011]
In FIG. 1D, reference numeral 232 denotes a gas bag insertion hole provided to install the gas bag 4 between the second packing 220 and the third packing 230. In the entrance member according to the present embodiment, in order to correspond to the propulsion machine having four concave-shaped mud drainage passage grooves provided on the outer peripheral wall in the entrance member according to the present embodiment, The gas bag insertion hole 232 is provided.
[0012]
The entrance member of the present invention has a structure in which bolts are screwed into the bolt holes 102, 212, 222, 233, 302 shown in FIG.
[0013]
Therefore, as shown in FIG. 2, when these entrance members are combined, the entrance part of the water stop structure is installed in the entrance box 1 installed on the wall of the shaft on the ground mountain a side, and in front of the entrance box 1 The entrance packing 2 includes the first packing 210, the second packing 220, and the third packing 230 and the packing presser 3 that suppresses the swelling of the entrance packing 2 due to the gas bag 4. When air is blown into the gas bag 4 inserted from the gas bag insertion hole 232 of the third packing 230, the gas bag 4 expands by gas filling, and the respective opening holes 231 of the third packing 230 and the second packing 220. When passing through 221, the convex part is sealed with the opening of the third packing 230 and the second packing 220 on the outer wall surface of the propulsion machine, and the concave wall surface of the mud drainage passage groove of the propulsion machine is inflated gas The bag is sealed with air pressure along the concave wall surface. With this individual sealing structure, it is possible to effectively prevent outflow of earth and sand, groundwater, and the like that are generated when the propulsion machine starts and reaches in the ace small construction method.
[0014]
In the case of the parasol type gas bag 4, the gas pack can be removed after all the pipes for piping are installed in the natural ground because the structure can be detachably inserted from the insertion hole 232. . Therefore, the entrance portion can be sealed without leaving a rubber member that is likely to be aged or deteriorated, and the water stop effect is not lowered due to deterioration of the rubber member or the like. Can be held at the entrance for a long time. In addition, this gas pack can be replaced during the construction, and in the case of deterioration or the like, it is possible to appropriately cope with it.
[0015]
In addition, although the gas bag of this invention is a parasol type gas bag (rubber balloon), it is not limited. However, in the case of a parasol-type gas bag (rubber balloon), the bulge starts from the front end portion and has a rod-like portion at the rear end portion, which is optimal in terms of structure for the entrance member of the present invention. In addition, since the bulging starts from the tip of the parasol type gas bag, the mud draining passage groove is sealed along the concave wall surface of the mud draining passage groove of the propulsion machine according to the swelling. Most preferred because it is expensive. The material of the gas bag is not limited, but it is desirable to use a durable rubber material or polymer elastomer material.
[0016]
Further, it is desirable to further install a gas back pressing metal fitting on the packing presser as means for pressing the third packing and pressing the gas bag popping out to the resisting side due to the expansion of the gas back.
[0017]
【The invention's effect】
Since the present invention is as described above, in the ACE small construction method, it is possible to effectively prevent the outflow of earth and sand, groundwater, and the like generated when the propulsion machine starts and reaches.
[Brief description of the drawings]
FIG. 1 is an entrance member used in a water stop structure according to the present invention. 1A is a schematic perspective view of an entrance box, FIG. 1B is a schematic perspective view of a first packing, FIG. 1C is a schematic perspective view of a second packing, and FIG. 1D is a perspective view of a third packing. (E) is a schematic view of a gas bag, and (F) is a schematic perspective view of a packing presser.
FIG. 2 is a schematic perspective view showing a state in which an entrance member is combined.
[Explanation of symbols]
1 Entrance Box 2 Entrance Packing 210 First Packing 220 Second Packing 230 Third Packing 3 Packing Presser 4 Gas Bag

Claims (4)

An ace mall method using a propulsion machine with a mud drainage passage groove with a concave cross section in the longitudinal direction of the outer peripheral wall, which prevents the outflow of earth and sand, groundwater, etc. generated when the propulsion machine starts and reaches In the still water structure,
The entrance part is
An entrance box installed on the wall of a vertical shaft on the natural mountain side and having an opening hole through which a propulsion machine passes;
Entrance packing, which is installed in front of this entrance box and is composed of a plurality of packings having opening holes through which the propulsion machine passes,
This entrance packing is composed of an entrance member provided with a packing presser that suppresses the bulge caused by the following gas bag,
In the entrance packing, a gas bag which swells by gas filling and seals the mud drainage passage groove along the concave wall surface of the mud drainage passage groove of the propulsion machine is passed through the opening hole. A water stop structure of an entrance part in the ace small construction method provided in a state facing a mud drainage passage groove having a concave cross section of a machine. The entrance packing is installed on the front side of the entrance box, and is installed on the front side of the first packing for preventing outflow of earth and sand, groundwater, etc. generated when the propulsion machine starts and arrives. It consists of a second packing that protects the packing and a third packing that is installed in front of the second packing,
The water stop structure of the entrance portion in the ace small construction method, wherein the third packing is provided with an insertion hole of the gas bag for installing the gas bag between the second packing and the third packing. The water stop structure of the entrance part in the ace small construction method according to claim 1 or 2, wherein the gas bag is a parasol type gas bag (rubber balloon). A first packing that is installed on the front side of the entrance box and prevents outflow of earth and sand and groundwater generated when the propulsion machine starts and reaches, and a first packing that is installed on the front of the first packing and protects the first packing. 2 packing and a third packing installed in front of the second packing,
In the third packing, a gas bag is installed between the second packing and the third packing, and an insertion hole for the gas bag is provided so that the gas bag faces the mud drainage passage groove of the propulsion machine. The entrance packing for the ace small construction method in which the gas bag is inserted and installed in the insertion hole.

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