JP4890085B2 - Method for constructing joint fitting part of impermeable wall, impermeable wall material, female joint and male joint - Google Patents

Description

  The present invention relates to a watertight wall joint construction method and a female joint in which a watertight wall is constructed by directly placing a plurality of watertight walls made of a water-impermeable material having joints on the ground. In particular, the present invention relates to a method for constructing a joint portion to ensure proper water-imperviousness, a female joint, and a male joint.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a general structure of a water shielding wall for the purpose of water shielding, and includes various water shielding wall materials such as a water shielding panel, for example, joint fitting portions between joint portions of a water shielding panel, pipes with slits ( It has not only PT joint by fitting between a water shielding panel having P joint) and a water shielding panel having T-shaped male joint (T joint), but also a steel pipe sheet pile joint and slits. A wide variety of joints with various shapes, such as when you want to fill the joint with a water-stopping material that does not contaminate the soil when it is placed directly on the ground, preventing the inflow of earth and sand into the joint. It is the joint fitting part construction method and female joint of the impermeable wall which can be applied to.

Conventionally, it has been known that soil and sand in a joint groove in a water-blocking wall material is washed and discharged. However, in this case, fine soil and sand remain in the joint and are mixed into the water-stopping filler. There is a problem that it is difficult to obtain a high water-stopping effect of the water-stopping filler.
Conventionally, (1) when the soil cement underground continuous wall is uncured and has fluidity, a water-impervious wall material in which a slit (side opening) in a female joint is sealed with a sealing material. In addition, a method for constructing a water-impervious underground wall by breaking a sealing material in the female joint by a male joint in a water-impervious wall material to be built in soil cement and then built (for example, Patent Document 1).

In addition, (2) a member that guides earth and sand into the steel pipe sheet pile while closing the end of the female joint at the lower end of the female joint in the steel pipe sheet pile when placing the steel pipe sheet pile into the ground In order to prevent the inflow of earth and sand from the slit in the female joint into the female joint on the premise that a certain chip is provided to reduce the inflow of earth and sand from the slit in the female joint, the slit is preliminarily cloth, paper, It is known to seal with a non-metal or metal foil material such as resin (for example, see Patent Document 2).
JP 2006-9242 A JP-A-9-78569

  In the case of the above method (1), since the impermeable wall material is built in the soil cement, the resistance at the time of placing is low, and the sealing material of the side opening of the female joint is fitted with the female joint by the male joint. However, it is sufficient if the material is strong enough to be broken by placing, but the sealing material is damaged by the ground resistance at the time of placing in the ground including the tightly ground sand, clay, and gravel. The soil cement underground continuous wall could not be realized except in the uncured and fluid state.

  Further, in the case of (2), the female joint of a form in which the bottom surface of the female joint is closed in an inclined state to form an inclined surface for guiding the earth and sand, and the earth and sand are guided into the steel pipe sheet pile main body. In order to prevent the inflow of earth and sand from the slit in the female joint into the female joint, the slit is previously sealed with a non-metal or metal foil material such as cloth, paper, resin, etc. Although the water joint is not filled in advance in the female joint, the surrounding earth and sand flows into the female joint when the male joint is driven while breaking the seal in the female joint. However, there is a problem that it is difficult to obtain a high water-blocking performance even if the water-stopping material is filled.

  Therefore, in the present invention, as a means for the purpose of constructing a joint portion that ensures a reliable water-impervious property even in the case of direct placement on a ground containing hard and tight sand ground, clay ground, or gravel stones. By using a female joint with a sealing material that is not broken by the ground resistance at the time of placement, the female joint fitting groove is kept open and filled with a water stop material in advance. Then, the joint fitting part construction method using the male joint which fits while breaking the sealing material is provided.

In order to advantageously solve the above-described problem, in the method for constructing a joint portion for a water-impervious wall according to the first invention, a plurality of water-impervious wall members made of a water-impermeable material having joints are directly placed on the ground. In constructing the impermeable wall by fitting the joints in the impermeable wall material adjacent in the lateral direction,
Before placing the first water shielding wall member provided with the steel female joint having the joint fitting groove and the side opening, the lower end portion of the female joint is closed, and the first water shielding wall material is formed. The side opening provided on the side surface of the female joint is sealed with a sealing material made of a thin steel plate that is not broken by the ground placement resistance at the time of casting, and the strip-shaped steel plates are brought into contact with the outer sides of both edges of the sealing material. The edge of the sealing material and the edge of the strip steel plate are fixed to the female joint by welding, and the first water-blocking wall material is placed on the ground in this state, thereby The inside of the fitting groove of the female joint after placing the water wall material is held in a hollow state, and the female joint fitting groove is filled with a water-stopping filler, and then the adjacent second water shielding member. The wall material male joint is fitted to the female joint, and the sealing material sealing the side opening of the female joint is adjacent to the second joint while being broken by the male joint. Characterized by pouring a water-impervious wall material to a predetermined depth.
According to a second aspect of the present invention, there is provided a method for constructing a joint-fitting portion for a water shielding wall in the first invention, wherein a friction cutter that protrudes laterally from the sealing material from the female joint is provided below the lower end portion of the sealing material. The first impermeable wall material is placed on the ground.
According to a third aspect of the present invention, there is provided a method for constructing a joint-fitting portion for a water-impervious wall, wherein the sealing member for the female joint is broken at the lower end of the male joint when the male joint is broken by the male joint. The sealing material is broken by a cutter inclined so that the lower end level descends toward the male joint tip side.
The water-impervious wall material according to a fourth aspect of the present invention is used in the method for constructing a joint portion for a water-impervious wall according to any one of the first to third aspects of the invention.
Moreover, in the female joint of 5th invention, it is a female joint in the water-shielding wall material used for the joint fitting part construction method of the water-shielding wall in any one of 1st invention-3rd invention, Comprising: When placing the material on the ground, the sealing material that seals the side opening provided on the side surface of the female joint is a metal plate that is not broken by the ground resistance when placing on the ground, and is broken by the male joint. The metal plate is fixed to the female joint by welding.
The female joint of the sixth invention is a female joint in a water shielding wall material used in the method for constructing a joint part of a water shielding wall according to any one of the first to third inventions, and is a side opening in the female joint. The female joint is provided with a friction cutter protruding laterally at a lower level than the portion.
A male joint according to a seventh aspect of the present invention is a male joint in a water shielding wall material used in the method for constructing a joint fitting portion for a water shielding wall according to any one of the first to third aspects, wherein the tip of the male joint The part is provided with a cutter for breaking the sealing material in the adjacent impermeable wall material.

According to the first aspect of the present invention, the side opening of the joint fitting groove in the first impermeable wall material is broken by the male joint fitted to the female joint before being directly placed on the ground, and Since it was sealed with a sealing material that was not broken by the installation resistance, it was clean and reliably eliminated the possibility of soil and earth mixing into the joint fitting groove of the female joint in the water shielding wall material when placed on the ground. It can be a joint fitting groove of a female joint.
In addition, since it is possible to prevent sediment from flowing into the joint simply by providing a sealing material at the side opening, a female joint that can prevent sediment from flowing into the joint can be manufactured at low cost, and the quality is good. It is possible to easily construct the joint fitting portion in the water shielding wall.
In the case of the present invention, the side opening of the female joint is sealed with the sealing material that is not broken by the ground placement resistance even when the water-impervious wall material is placed on the ground. Even if the earth and sand guide member which guides in the main part of the impermeable wall material is not provided at the lower end of the female joint, it can be easily constructed.
Since the inside of the joint fitting groove of the female joint in the first water-impervious wall material directly placed on the ground as described above is clean, the joint fitting groove is filled with a water-stopping filler, Then, a male joint in the second adjacent water-impervious wall material is fitted into the joint fitting groove, and the second material adjacent to the side opening of the female joint is broken while being broken by the male joint. Therefore, the joint fitting groove is filled with a filler, so that the joint fitting groove has a lateral pressure due to the water-stopping filler. The possibility of soil and sand around the female joint entering the joint fitting groove can be eliminated, so that a joint portion with a high water stopping performance of the joint fitting portion between the water shielding wall materials can be constructed. It is possible to easily construct a water shielding wall with extremely high water performance.
According to the fifth invention, since the sealing material for sealing the side opening in the female joint is fixed as a metal plate by welding, the side opening of the female joint can be easily sealed. Moreover, the sealing material which has sealed the side surface opening part can be fractured | ruptured by the male joint in an adjacent water-impervious wall material, and joints can be fitted.
According to the sixth aspect of the present invention, the ground directly contacting the sealing material of the side opening is disturbed by the friction cutter provided in a structure projecting sideward at a lower level than the side opening of the female joint in the water shielding wall material. Therefore, the ground resistance exerted on the sealing material is reduced, and there is an effect that the material for closing the side opening in the female joint can be a thin plate material such as a thin steel plate.
According to the seventh invention, since the cutter for breaking the sealing material in the adjacent impermeable wall material is provided at the distal end portion of the male joint in the impermeable wall material, The sealing material can be surely broken.

    Next, the present invention will be described in detail based on the illustrated embodiment.

  1 to 4 show a water-impervious wall material 1 made of a water-impermeable material such as a steel plate used in the first embodiment of the present invention. On both sides, a continuous joint extending in the vertical direction is provided. In this embodiment, a male joint 3 having a T-shaped cross section is provided on one side of the water-blocking wall body 2, and the water-blocking wall On the other side of the material main body 2, there is provided an annular female joint 5 having a partially cut-out cross section cut by a side opening 4 made of a slit.

  The inclined end portion of the lower end of the female joint 5 is closed by a steel plate bottom plate 6 fixed by welding or the like, and the side opening 4 of the lower end portion is wider than the thin steel plate 9 and the steel strip 10. A steel friction cutter 8 fixed to the female joint component piece 7 having a semicircular cross section is fixed by welding or the like so as to cross. The friction cutter 8 is installed so that the friction cutter 8 and the bottom plate 6 are connected to each other vertically so that the side opening 4 does not remain below the friction cutter 8. In addition, when there is a distance between the friction cutter 8 and the bottom plate 6, a steel plate is appropriately provided over the female joint component piece 7 so as to block the side opening 4.

  In the side opening 4 positioned at a higher level than the friction cutter 8, a sealing material 9 made of a thin strip steel plate having a width wider than the width of the side opening 4 is provided in the vertical direction across the side opening 4. 3A and 3B, the strip-shaped steel plates 10 are brought into contact with the outer sides of both side edges of the sealing material 9, and the edges of the thin-walled sealing material 9 and the edges of the strip-shaped steel plate 10 are shown in FIG. As shown, it is fixed to the female joint component piece 7 by Tig welding W.

  The side opening 4 from the side opening 4 on the upper surface level of the friction cutter 8 to the upper end of the water-blocking wall body 2 is closed by the sealing material 9.

As shown in FIG. 2 and FIGS. 3C and 3D, a sealing material breaking cutter portion 11 having a tapered tip is formed at the lower end portion of the water-blocking wall body 2 in the male joint 3. ing.
The sealing material breaking cutter portion 11 has a cutting edge tapered so that the extended surface of the side surface of the front end portion of the impermeable wall material body 2 intersects at an acute angle, and the sealing material breaking cutter portion 11 Is subjected to a heat treatment such as quenching to be cured.
In addition, since the sealing material 9 in the adjacent female joint 5 is broken by the sealing material breaking cutter portion 11, the sealing material 9 is prevented from entering the inside of the fitting fitting groove 12 of the female joint. The lower end portion of the sealing material breaking cutter portion 11 so that the sealing material breaking cutter portion 11 always breaks (cuts) the sealing material 9 toward the radially outer side of the side opening 4 in the female joint 5. May be inclined so that the lower end level increases in the width direction of the water-impervious wall material body 2 toward the female joint 5 side, as indicated by a two-dot chain line in FIG.

  When the impermeable wall material 1 is driven on the ground 13 by the friction cutter 8, a gap is formed between the sealing material 9 on the upper side of the friction cutter 8 and the ground 13. The sealing material 9 can be made of a thin plate material such as the thin steel plate 9a. Moreover, when fixing the side edge part of the said thin steel plate 9a to the female joint structural piece 7 by Tig welding etc., the strip | belt-shaped steel plate 10 is contact | abutted to the both ends of the sealing material 9, and is used as sealing material. By fixing the edge of 9 and the edge of the strip steel plate 10 to the female joint component piece 7 by welding, the thin steel plate 9a can be used practically as the sealing material 9, and placed in the ground At the time or when the sealing material is broken by the male joint, the edge on the sealing material 9 side is prevented from being damaged. In addition, as the said thin steel plate 9a as the said sealing material 9, it is good to use the strip | belt-shaped thin steel plate whose plate | board thickness is about 0.1 mm-1 mm, Preferably, it is about 0.2 mm-0.5 mm.

  In addition, when the sealing material 9 and the strip steel plate 10 temporarily fixed by spot welding or the like are fixed to the outer surface of the female joint component piece 7 by fillet welding, the sealing material 9 is attached to the female joint 5. Installation work becomes easy.

  Next, a method for constructing the joint fitting portion of the impermeable wall of the present invention using the impermeable wall material 1 as described above will be described with reference to FIG.

In the present invention, in order to place the first impermeable wall material 1 directly on the ground 13 and to prevent the surrounding earth and sand from flowing into the joint fitting groove 12, As shown in FIG. 5A, the side opening 4 is sealed with the sealing material 9, and in this state, the first impermeable wall material 1 is driven to the ground 13 to a predetermined depth. .
Accordingly, the joint fitting groove 12 of the female joint 5 of the impermeable wall member 1 placed in the ground 13 is maintained in a continuous hole state in the vertical direction, and the joint of the female joint 5 in this hole state is maintained. As shown in FIG. 5B, the fitting groove 12 is filled with a water-stopping filler 14 such as non-shrink mortar, bentonite or asphalt up to the upper end level of the female joint 5.

  By filling the female joint 5 with the water-stop filler 14 as described above, the female joint 3 in the adjacent second impermeable wall member 1 is replaced with the female joint filled with the water-stop filler 14. 5, the earth and sand are prevented from flowing from the surrounding ground 13 into the joint fitting groove 12 filled with the water-stop filler 14, Performance has been improved.

And as shown in FIG.5 (c), before filling the water stop filler 14 in the joint fitting groove 12 of the female joint 5 as mentioned above, and before the water stop filler 14 hardens | cures, The male joint 3 in the adjacent second impermeable wall material 1 is fitted into the female joint 5 in the first impermeable wall material 1 and is placed on the ground 13.
At this time, the second shielding member 9 is broken while the sealing member 9 of the thin steel plate in the first impermeable wall material 1 is broken by the sealing member breaking cutter portion 11 in the male joint 3 of the second impermeable wall material 1. The water wall material 1 is placed on the ground 13.
Since the fracture side edge portion of the fractured sealing material 9 is subjected to the lateral pressure of the water-stopping filler 14 having a larger specific gravity and a larger side pressure than the surrounding ground 13 such as mortar or non-shrink mortar, the sealing material 9 The free end portion of the sealing material 9 that has been spread and broken to the outside of the female joint 5 can be crimped to the male joint 3 side to prevent the surrounding earth and sand from flowing into the joint groove.
In addition, if the low-strength part which continued in the up-down direction is formed as a thin low-strength part near the center part in the width direction of the sealing material 9 of the thin steel plate, the sealing material Only the low strength portion 9 can be reliably broken by the sealing material breaking cutter portion 11 in the male joint 3. As the thin low-strength portion, it is preferable to thin the joint fitting groove 12 side in the center portion in the width direction of the sealing material 9 made of a strip-shaped thin steel plate.

The second impermeable wall material 1 has the same structure as the first impermeable wall material 1, and after the second impermeable wall material 1 is placed at a predetermined position on the ground 13, In the joint fitting groove 12 which is a hole of the female joint 5, the water-stopping filler 14 is filled in the same manner as described above.
Hereinafter, similarly, the second impermeable wall material 1 is used as the first impermeable wall material 1, and the step of placing the second impermeable wall material 1 adjacent thereto is performed as many times as necessary. Repeatedly, the continuous impermeable wall 15 having the required width is constructed.

In the water-impervious wall 15 constructed as described above, the water-stopping performance of the joint fitting portion by the hardened water-stopping filler 14 improves the joint performance remarkably because there is no inflow of surrounding earth and sand. be able to.
In addition, when the soil in the joint groove is washed and discharged as in the prior art, after washing, the fine soil and sand collapse from the slit (side opening 4), and the fine soil and sand remain. Since it is mixed in the water filler 14, it is difficult to obtain the high water stop effect of the water stop filler 14, but in the present invention, there is no inflow of earth and sand from the side opening 4. “High water-stopping effect can be obtained by the filler 14.

(For other forms of impermeable wall material 1)
In the above-described embodiment, one form of the water-impervious wall material 1 has been described. However, in the case of carrying out the present invention, forms other than the above-described forms are possible. The form of the female joint 5 which has the wall material 1, especially the joint fitting groove | channel 12, and the male joint 3 is demonstrated with reference to FIGS. In addition, the same code | symbol is attached | subjected to the element similar to the said embodiment.

  6 (a) to 6 (h) show the female joint 5 in the impermeable wall member 1 of another form, respectively, and FIGS. 7 (a) to 7 (h) respectively show the above-mentioned FIG. 6 (a). Corresponding to the female joint 5 in (h), a male / female joint fitting portion 16 into which the male joint 3 is fitted is shown.

  In FIG. 6A and FIG. 7A, a sealing material 9 is provided in a female joint 5 having a partially cut-out circular cross section having a side opening 4 such as a slit 4a in substantially the same manner as in the first embodiment. In the other water-impervious wall material 1, a joint not provided with the sealing material 9 is used as the male joint 3, and the female joint 5 filled with the water-stopping filler 14 is sealed. The male joint 3 is fitted while the material 9 is broken.

  In FIG. 6B and FIG. 7B, a sealing material 9 is provided in a female joint 5 having a partially cut-out circular cross section having a side opening 4 such as a slit 4a, in substantially the same manner as in the first embodiment. In the other water-impervious wall material 1, the male joint 3 having a Y-shaped cross section is used, and the sealing material 9 is broken in the female joint 5 filled with the water-stopping filler 14. However, the male joint 3 is fitted.

  In FIG. 6C and FIG. 7C, the sealing material 9 is attached to the female joint 5 having a partially cut-out circular cross section having a side opening 4 such as a slit 4a in substantially the same manner as in the first embodiment. In the other impermeable wall material 1, a male joint 3 having a T-shaped cross section in which a narrow plate material is fixed to the distal end portion of a plate-shaped impermeable wall material body 2 is used. Thus, the male joint 3 is fitted to the female joint 5 filled with the water-stopping filler 14 while the sealing material 9 is broken.

  6 (d) and FIG. 7 (d), the female joint 5 is a female joint 5 having an inverted F-shaped cross section, and includes two overhanging arms spaced from each other at the front end side of the inverted F-shaped one cross section. A groove between the pieces 7 is a joint fitting groove 12, and a sealing material 9 is fixed across the female joint constituting piece 7 to constitute one female joint 5, and the other joint is the female joint construction described above. Without providing the sealing material 9 between the pieces 7, the male joint 3 is formed, and the female joint constituting piece 7 on the distal end side of the male joint 3 is replaced with the joint fitting groove filled with the water-stopping filler 14. The male joint 3 is fitted to the female joint 5 having 12 while the sealing material 9 is broken.

  In FIG.6 (e) and FIG.7 (e), it is set as the female joint 5 which provided the sealing material 9 over the female joint structural piece 7 of the female joint 5 with a nail | claw which has a nail | claw part in the front-end | tip part of a joint structural piece. In the other impermeable wall material 1, a protruding portion 18 that is continuous in the vertical direction is formed on one side of the tip of the plate-shaped impermeable wall material main body 2 to form a male joint 3, and in the groove of the female joint 5. The male joint 3 is fitted to the female joint 5 filled with the water-stopping filler material 14 while the sealing material 9 is broken so that the protrusion 18 is positioned at the same position.

  In FIG. 6 (f) and FIG. 7 (f), the female joint 5 in which the sealing material 9 is provided in the female joint 5 having a partially cut-off square cross section having the side opening 4 such as the slit 4a is provided, and the other shield is provided. In the water wall material 1, a male joint 3 having a T-shaped cross section in which a narrow plate material is fixed to the tip of a plate-shaped impermeable wall material main body 2 is used, and a water-stopping filler 14 is filled. The male joint 3 is fitted to the female joint 5 while the sealing material 9 is broken.

  6 (g) and 7 (g), the end portion of the impermeable wall main body 2 is a locking end portion having a locking projection, and the fitting groove 12 has a dovetail shape with a substantially E-shaped cross section. A female fitting 5 in which the side opening 4 of the dovetail fitting groove 12 on the other end side of the fitting 19 is closed with a sealing material 9, In the other impermeable wall material 1, the impermeable wall material 1 including the male joint 3 in which the end portion of the impermeable wall main body 2 is used as an engaging end portion including an engaging projection is used. In this embodiment, the male joint 3 is fitted to the female joint 5 filled with the filler 14 for use while the sealing material 9 is broken.

  In FIG. 6 (h) and FIG. 7 (h), the female joint component piece 7 having a side opening 4 side that is thin with a partially cut circular female joint 5 having a side opening 4 such as a slit 4a. A female joint 5 provided with a sealing material 9 is provided. On the other impermeable wall material 1, a protrusion 18 that is continuous in the vertical direction is formed on one side of the tip of the plate-like impermeable wall material body 2. Then, the male joint 3 is formed while breaking the sealing material 9 in the female joint 5 filled with the water-stopping filler 14 so that the protrusion 18 is positioned in the groove of the female joint 5. It is the form which is made to fit.

  8 (a) to 8 (g) show the female joint 5 in the water-impervious wall material 1 in another form, respectively, and FIGS. 9 (a) to 9 (g) show the above-described FIG. Corresponding to the female joint 5 of a) to (g), a male / female joint fitting portion 16 into which the male joint 3 is fitted is shown. In these embodiments, the central axis on the main body side of the water-impervious wall material 1 is on the same central axis.

  8 (a) and 9 (a), the female joint 5 in one of the water shielding wall materials 1 is a flat horizontally elongated female joint 5 so as to intersect the water shielding wall main body at a right angle, and the side opening 4 Is provided at a position eccentric to one side, and the other male joint 3 is a male joint 3 in which the proximal-side protruding dimension of the joint component piece on the side that fits into the groove of the female joint 5 is increased. In this configuration, the male joint 3 is fitted to the female joint 5 filled with the water-stopping filler 14 without breaking the sealing member 9 while breaking the sealing material 9.

  8 (b) and 9 (b), the female joint 5 in one of the impermeable wall materials 1 is provided such that the central axis of the fitting groove is inclined and intersects the impermeable wall main body. The female joint 5 is used in which the sealing member 9 is provided across the joint tip and the joint body, and the other male joint 3 is not provided with the sealing material in the female joint 5. A female joint 5 in which the female joint 5 and the male joint 3 have a point-symmetrical shape (except for the sealing material 9) and is filled with a water-stopping filler 14. 5, the male joint 3 is fitted while the sealing material 9 is broken.

  8 (c) and 9 (c), the side opening 4 having a partially cut-off annular shape in cross section in one of the water-impervious wall materials 1 is provided at a position eccentric in the circumferential direction of the female joint 5. The female joint 5 is provided with a sealing material 9 so as to seal the opening 4, and the other male joint 3 is a male joint 3 in which the sealing material 9 is not provided in the female joint 5. The male joint 3 has a point-symmetric shape (with the sealing material 9 removed), and the female joint 5 filled with the water-stopping filler 14 is broken while the sealing material 9 is broken. This is a form in which the joint 3 is fitted.

  8 (d) and 9 (d), a female joint 5 is provided in which a sealing member 9 is provided on a female joint 5 having a partially cut-off square cross section having a side opening 4 such as a slit 4a. In the water wall material 1, a U-shaped male joint 3 with a flange is used, a female joint 5 filled with a water-stopping filler 14 is provided, and a flange portion 21 of the male joint 3 is provided in a groove of the female joint 5. The male joint 3 is fitted so as to be positioned.

  8 (e) and 9 (e), a water-impervious wall material having a female joint 5 in which a sealing material 9 is provided on a female joint 5 having a partially cut-out square cross section having a side opening 4 such as a slit 4a. 1 is placed on the ground in series so as to oppose each other at intervals, and both flanges 21 of male water-impervious wall material 20 having an I-shaped cross section are formed as male joints 3 in each female joint 5. The male joint 3 is fitted to the female joint 5 filled with 14 while the sealing material 9 is broken.

  8 (f) and 9 (f), a female joint 5 in which a sealing material 9 is provided in a female joint 5 having a partially cut-out oval cross section having a side opening 4 such as a slit 4a is provided. The male joint 3 in the water-impervious wall material 1 is a male joint 3 in which the sealing material 9 is not provided, and the male joint 3 is fitted to the female joint 5 filled with the water-stopping filler 14 while breaking the sealing material 9. It is a form that matches.

  In FIG. 8 (g) and FIG. 9 (g), a joint is formed by winding a steel plate in a spiral shape about 360 degrees, and extends over the outer surface of the female joint 5 and the base end side (main body 2 side) of the water-impervious wall material 1. Thus, the male joint 3 in the other water-impervious wall material 1 is formed by spirally winding a steel plate about 360 degrees and the female joint 5 in the same manner as described above. In this case, the male joint 3 swells radially outward so as to prevent interference with the base-end-side fixing portion of the sealing material 9 in the sealing material 9, and the sealing material 9 is broken into the female joint 5 filled with the water-stopping filler 14. However, the male joint 3 is fitted.

  10 (a) to 10 (d) show the female joint 5 in the water shielding wall member 1 as a water shielding material body of another form, respectively, and FIGS. 11 (a) to 11 (c) A male / female joint fitting portion 16 into which the male joint 3 is fitted is shown corresponding to the female joint 5 in FIGS. 10 (a) to 10 (c).

  10 (a) (b) and 11 (a) (b), the main body of the impermeable wall material 1 is the impermeable wall material body 2 made of the steel pipe 2a. In such a case, the steel pipe A pair of cross-section L-shaped steel members are arranged on one outer surface in the diametrical direction 2a so as to face each other in parallel, and the base end side is fixed by welding to constitute one female joint 5. The other male joint 3 is formed by fixing the base end portion of the web 3a of the steel material having a T-shaped cross section to the outer surface in the radial direction of the water-impervious wall material body 2 in the vertical direction by welding. Then, the male joint 3 in the adjacent impermeable wall material 1 is fitted to the female joint 5 filled with the water-stop filler 14 while breaking the sealing material 9.

  10 (c) and 11 (c), the water shielding wall main body 2 is a steel pipe 2a, a female joint 5 is fixed to the steel pipe 2a by welding, and a partially cut circle having a side opening 4 such as a slit. The sealing member 9 is provided on the annular female joint 5 to form one female joint 5, but the other configuration is the same as the configuration shown in FIG. 9 (c) and FIG. 9 (c). .

  In FIG. 10 (d) and FIG. 11 (d), the water shielding wall body 2 is a steel pipe 2a, and the web base end side of the male joint 3 having a T-shaped cross section is fixed to the steel pipe 2a by welding. 3, the male joint 3 is fitted in the fitting groove of the female joint 5, but the configuration is the same as in the above-described case.

FIG. 12 to FIG. 14 further show another embodiment of the present invention. In this embodiment, the stiffening frame 21 is provided over the entire length of the impermeable wall material 1 at the intermediate portion in the width direction of the impermeable wall material 1. The water-impervious wall material 1 is placed on the ground 13 in a state in which the water-impervious wall material 1 is temporarily detachably held by the stiffening frame 21, and then the temporary holding state is released. This is a form in which the impermeable wall 15 is constructed by the impermeable wall material 1 in a form in which only the water is collected.
The female joint 5 in the water-impervious wall material 1 as described above is also provided with a sealing material 9 for closing the side opening 4 in the female joint 5 and a friction cutter 8 at the lower end portion, as in the above embodiment. May be applied.

  Note that the impermeable wall member 1 having such a configuration includes a plurality of locking hooks 22 in the width direction at the lower end portion, and a plurality of connection brackets 23 having pins or bolt insertion holes at the upper end portion. It has. The lower end of the stiffening frame 21 is provided with a plurality of vertical pins 24 at intervals in the width direction, and at the upper part is a right-handed screw shaft unit integral with the connecting fitting 26 on one end side of the turnbuckle 25. A left screw shaft portion 28 screwed and connected to the stiffening frame 21 so as to be rotatable at one end side thereof is provided with a tension connecting fitting 27 having a length adjusting function screwed to the other end side of the turnbuckle 25. The tension connection fitting 27 is rotatably provided on the stiffening frame 21.

  When the impermeable wall member 1 having such a configuration is temporarily held by the stiffening frame 21, each vertical pin 24 on the distal end side of the stiffening frame 21 is inserted and locked into the locking hook 22 in the impermeable wall material 1. In this way, the stiffening frame 21 is superposed on the impermeable wall material 1, and the connecting bracket 26 of the tension connecting fitting 27 in the stiffening frame 21 is attached to the connecting bracket 23 of the impermeable wall member 1 by a horizontal axis such as a bolt. In this state, when the turnbuckle 25 is rotated so that the water-impervious wall material 1 is pulled up to the upper part of the stiffening frame 21, the vertical pin 24 in the stiffening frame 21 The movement of the locking hook 22 is prevented, the water-impervious wall material 1 becomes tensioned, and the turnbuckle 25 is rotated in the reverse direction in such a manner that it can be transported or driven into the ground together with the stiffening frame 21, Tension coupling 2 Opening the along the stiffening frame 21 to the water-impervious wall material 1, for example, when the slides can be separated stiffening frame 21 from the water-impervious wall material 1.

(Example)
As described above, the water-impervious wall material 1 can be in various forms, but as an example, it is manufactured to the following dimensions as an example of the form shown in FIG.
The diameter of the steel pipe in the female joint 5 is 114.3 mm, the width of the side opening 4 (slit) is 30 mm, and the length of the steel pipe is 12 m.
When a strip-shaped thin steel plate is used as the sealing material 9, the thickness of the thin steel plate is 0.2 mm, the width is 140 mm, and the length is 12 m.
A strip steel plate 10 having a thickness of 3.0 mm, a width of 13 mm and a length of 12 m is overlapped on both side edges of the sealing material 9 made of the strip-shaped thin steel plate, and fixed to the female joint component piece 7 by Tig welding. The side opening 4 is sealed.
The male joint 3 is formed by fixing a steel plate having a thickness of 9 mm and a width dimension of 65 mm by welding at a right angle to the tip of the plate-shaped water shielding material main body 2.

As described above, in order to prevent the inflow of earth and sand into the joint, when a strip-shaped thin steel plate is used as the sealing material 9 for the side opening 4, the accessory plate or the like is appropriately polymerized on the side edge of the thin steel plate. Since it can be fixed to the outer surface of the female joint component piece 7 by Tig welding, an inexpensive sealing material 9 for closing the side surface opening 4 can be obtained, and the female joint provided with such a sealing material 9 5 can be manufactured easily and inexpensively.
Further, in the female joint 5 having a sealed structure in which the bottom is closed by the bottom plate 6 and the side opening 4 is closed by the sealing material 9 so that the inflow of earth and sand is prevented, The inside of the joint 5 can be held in a hole, so that the cleaning process in the joint that has been conventionally performed is not required, and the construction cost can be reduced.
Further, after filling the holes in the female joint with the water-stopping filler 14, the male joint 3 is fitted while breaking the sealing material 9 made of a thin steel plate, whereby the water-stopping filler 14 is broken. Even if the sealing material 9 comes out to the outside, it is possible to build a dense joint portion in which the earth and sand are not mixed in the female joint 5. Therefore, joint quality can be improved. Even if large foreign matter can be discharged by discharging the soil inside the joint by washing as in the past, fine sand mud flows in one after another from the side opening (slit) 4 and the inside of the joint cannot be washed away, and the remaining foreign matter is one. In the present invention, even in the method of constructing the joint fitting portion by directly placing the impermeable wall material 1 on the ground, there is no such a conventional technique, and it is markedly different. An excellent joint structure can be constructed.

  Further, as described above, in the case of the present invention, the side opening 4 of the female joint 5 is formed by the sealing material 9 that is not broken by the placement resistance of the ground 13 even if the water-impervious wall material 1 is placed on the ground 13. Therefore, it is possible to easily perform construction without providing an earth-and-sand guiding member for guiding the lower end portion of the female joint 5 to the inside of the water-blocking wall material body as in the prior art.

According to the construction method of the joint part of the present invention as described above, a joint fitting part having a water permeability coefficient of 10 ⁻⁶ cm / second or less can be constructed with a converted water permeability coefficient of 50 cm or less.

It is a perspective view which shows 1st Embodiment of the water-impervious wall material used in 1st Embodiment of this invention. It is a partially cutaway perspective view which expands and shows the upper end part vicinity and lower end part vicinity of FIG. (A) is a cross-sectional plan view of the intermediate portion of the water-impervious wall material of the first embodiment, (b) is a cross-sectional plan view showing the vicinity of the friction cutter, and (c) is the vicinity of the cutter at the lower end of the male joint in the water-impervious wall material. (D) is the sectional view on the AA line of (c). FIG. 3 is a partially cutaway perspective view showing a sealing material separated from the state of FIG. 2. (A) is a cross-sectional plan view showing a state where a water-impervious wall material is placed on the ground, (b) is a cross-sectional plan view showing a state in which the fitting groove is filled with a filler, and (c) is an adjacent shield. It is a cross-sectional top view which shows the state which is driving | running | working while breaking the sealing material to a female joint with the male joint in a water wall material. (A)-(h) is a cross-sectional top view which shows the state which provided the sealing material in the female joint which has a fitting groove of various forms. (A)-(h) is a top view which shows the state which has fitted the male joint of the adjacent impermeable wall material to the female joint which has a fitting groove of the various forms shown in FIG. (A)-(g) is a cross-sectional top view which shows the female joint which has a fitting groove of another various form. (A)-(g) is a cross-sectional top view which shows the state which fitted the male joint of the adjacent impermeable wall material to the female joint which has a fitting groove of the other various form shown in FIG. It is a top view which shows the state which made the sheet pile main body a steel pipe, and fitted the male joint of the adjacent impermeable wall material to the various female joints which have a fitting groove in the steel pipe. It is a cross-sectional top view which shows the state which fitted the male joint in the adjacent water-impervious wall material to the female joint shown in FIG. It is a perspective view which shows the water-impervious wall material of another form. FIG. 13 is a partially cutaway perspective view showing the vicinity of the upper end portion and the middle portion of FIG. 12 in an enlarged manner. It is a perspective view which shows the state which superposed | polymerized and added the stiffening frame to the water-impervious wall material. It is an enlarged view which expands and shows a part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water-blocking wall material 2 Water-blocking wall material main body 2a Steel pipe 3 Male joint 3a Web 4 Side opening 4a Slit 5 Female joint 6 Bottom plate 7 Female joint component piece 8 Friction cutter 9 Sealing material 9a Thin steel plate 10 Strip steel plate 11 Cutter unit 12 Joint fitting groove 13 Ground 14 Water stop filler 15 Water shielding wall 16 Fitting portion 17 Overhang arm 18 Projection 19 Joint metal fitting 20 Male water shielding wall material 21 Stiffening frame 22 Locking hook 23 Connecting bracket 24 Vertical Pin 25 Turnbuckle 26 Connecting bracket 27 Tension connecting bracket 28 Left-hand threaded shaft

Claims (7)

In constructing a water-impervious wall by fitting a plurality of water-impervious wall materials made of water-impermeable material having joints directly on the ground and fitting joints in water-impervious wall materials adjacent to each other in the lateral direction,
Before placing the first water shielding wall member provided with the steel female joint having the joint fitting groove and the side opening, the lower end portion of the female joint is closed, and the first water shielding wall material is formed. The side opening provided on the side surface of the female joint is sealed with a sealing material made of a thin steel plate that is not broken by the ground placement resistance at the time of casting, and the strip-shaped steel plates are brought into contact with the outer sides of both edges of the sealing material. The edge of the sealing material and the edge of the strip steel plate are fixed to the female joint by welding, and the first water-blocking wall material is placed on the ground in this state, thereby The inside of the fitting groove of the female joint after placing the water wall material is held in a hollow state, and the female joint fitting groove is filled with a water-stopping filler, and then the adjacent second water shielding member. The wall material male joint is fitted to the female joint, and the sealing material sealing the side opening of the female joint is adjacent to the second joint while being broken by the male joint. Joint fitting portion construction method of water shield wall, characterized by pouring a water-impervious wall material to a predetermined depth. The first water-impervious wall member provided with a friction cutter protruding from the female joint to the side from the sealing member below the lower end of the sealing member is placed on the ground. Method for constructing joint fitting part of water-impervious wall. When the sealing material of the female joint is broken by the male joint, the sealing material is broken by a cutter provided at the lower end of the male joint and inclined so that the lower end level descends toward the distal end side of the male joint. The method for constructing a joint fitting portion for a water shielding wall according to claim 1 or 2. It is used for the joint fitting part construction method of the impermeable wall of any one of Claims 1-3. The impermeable wall material characterized by the above-mentioned.   It is a female joint in the impermeable wall material used for the joint fitting part construction method of the impermeable wall of any one of Claims 1-3, Comprising: When installing a impermeable wall material in the ground, a female joint The sealing material that seals the side opening provided on the side surface of the metal plate is a metal plate that is not broken by ground resistance when it is placed on the ground, and is constituted by a metal plate that is broken by a male joint. A female joint that is fixed to a female joint by welding.   It is a female joint in the impermeable wall material used for the joint fitting part construction method of the impermeable wall according to any one of claims 1 to 3, and at a lower level than a side opening in the female joint, A female joint is provided with a friction cutter protruding in the direction of the female joint.   It is a male joint in the impermeable wall material used for the joint fitting part construction method of the impermeable wall of any one of Claims 1-3, Comprising: The impermeable wall material adjacent to the front-end | tip part of the said male joint A male joint provided with a cutter for breaking the sealing material.

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