JP2002167752A - Water cut-off structure and water cut-off method of joint part of steel sheet pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of a water leakage passage in an interface between a steel material of a joint inside surface and a bag body for housing a water cut-off age-hardening filler inserted into a pocket part of a joint fitting part of a steel sheet pile existing in the water. SOLUTION: The bag body 10 for surficially fixing a water cut-off elastic material 11 continuing in the joint lengthwise direction is inserted into the pocket part 15 formed in the joint fitting part 4 of the steel sheet pile such as a steel pipe sheet pile 1 (or the steel sheet pile), and the water cut-off age- hardening filler such as mortar 16 or concrete is filled inside the bag body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a water-blocking revetment work,
This is related to the improvement of the water stopping method in the joint structure of steel sheet piles such as steel sheet piles, steel pipe sheet piles, etc. used for land reclamation work, embankment construction work, etc. In addition, the mortar filling pocket portion of the joint fitting portion is provided with measures for preventing leakage of the water-stopping time-curable filler that is contained and filled in the bag.

[0002]

2. Description of the Related Art Conventionally, steel sheet piles such as steel sheet piles and steel pipe sheet piles are used for revetment works, landfill works, embankment works, and the like.
In particular, when steel sheet piles are used for water-blocking revetment structures at landfills that dispose of industrial waste or general waste at sea, landfill from the landfill through the fittings of steel sheet piles. It is strictly required to prevent leaching into the open sea.

In general, when constructing a landfill at sea, a revetment is constructed along the boundary of the planned landfill, a landfill is cut off from the open sea, and waste is disposed within the landfill. Was dumped. As the revetment type, steel sheet piles such as steel sheet piles and steel pipe sheet piles are used.

[0004] When constructing a sea reclamation revetment using steel sheet piles such as steel sheet piles and steel pipe sheet piles, an important consideration is that contaminated water in a landfill disposal site causes seawater from the bottom of the revetment or a sheet pile joint to be removed. How to prevent leaching into

In a conventional steel sheet pile and steel pipe sheet pile, a male fitting has a T-shape, and a female fitting has a shape that forms a circular or square pocket. Is generally filled with mortar for waterproofing.

[0006] When the joint fitting portion is in the underground portion, the joint is covered with the soil even if the pocket of the joint portion is filled with a mortar which is a time-hardening filler for water stoppage. Therefore, the mortar does not leak out of the gap of the joint before curing, but when the joint fitting portion is located above the ground or in the water, there is a problem that the filled mortar leaks out before curing.

As a countermeasure, conventionally, a bag called a mortar jacket, which is made of a mesh that does not allow mortar before hardening to flow out, is inserted into a gap portion (mortar filling pocket portion) of the joint fitting portion. A method of filling the mortar into the bag body to fill the gap in the joint portion and stop water is taken.

[0008]

However, in the method of filling the water-blocking mortar into the bag, the bag is interposed between the mortar and the inner surface of the steel material of the joint fitting portion. The study by the present inventors has revealed that the adhesiveness of the interface is reduced, and a gap is formed at the interface, which serves as a water leakage path.

The present invention solves the above-mentioned problems based on the results of the above-mentioned research. The present invention is directed to a joint member of a steel sheet pile and a bag containing a time-hardening filler for stopping water and a steel material of a joint. It is intended to provide a joint structure and a water stopping method, which prevent a decrease in adhesion at an interface between the joint and a water leakage path at the interface.

[0010]

SUMMARY OF THE INVENTION In order to advantageously solve the above-mentioned conventional problems, the present invention is configured as follows.

According to a first aspect of the present invention, there is provided a bag in which a water-stopping elastic material continuous in the longitudinal direction of a joint is fixed to a surface in a pocket formed in a joint fitting portion of a steel sheet pile such as a steel sheet pile and a steel pipe sheet pile. The bag is inserted, and the inside of the bag is filled with a water-proof, time-curable filler such as mortar or concrete.

According to a second aspect of the present invention, there is provided a bag in which a water-stopping elastic material continuous in the longitudinal direction of a joint is fixed to a surface in a pocket formed in a joint fitting portion of a steel sheet pile such as a steel sheet pile and a steel pipe sheet pile. By inserting a body, and filling the inside of the bag body with a water-stopping time-curable filler such as mortar or concrete, the elastic material for water-stopping and the steel material on the inner surface of the joint portion are pressed against each other. It is characterized by.

According to a third aspect of the present invention, a time-hardening filler for stopping water, such as mortar or concrete, is inserted into a pocket formed in a joint fitting portion of a steel sheet pile such as a steel sheet pile and a steel pipe sheet pile. Characterized in that a water-stopping elastic material continuous in the longitudinal direction of the joint is fixed to the surface of the bag.

A fourth aspect of the present invention is the bag according to any one of the first to third aspects, wherein the elastic material for stopping water in the bag is made of a water-swellable material. I do.

[0015]

According to the present invention, a water-stopping elastic material which is continuous in the longitudinal direction of the joint and is arranged so as to block the water leakage path at the interface between the steel material on the inner surface of the joint and the bag in the longitudinal direction of the joint. Can be fixed to both the bag body and the steel material in a watertight manner, so as to cut off the water leakage path at the interface between the bag body and the steel material via the water-stopping material, insert the bag body into the pocket of the joint fitting portion, By filling the interior of the bag with mortar or concrete, the water stopping performance of the joint can be improved.

Further, since the water-stopping elastic material is fixed to the bag in advance, there is no special step for improving the water-stopping performance in the water-stopping operation of the joint, so that the joint can be easily stopped. Water performance can be improved.

The bag for filling the mortar is generally made of stretchable nylon fiber or the like. By filling the inside with the mortar, the bag spreads and comes into close contact with the steel material. In the present invention, the water-stopping elastic material is fixed to the bag body, the water-stopping elastic material is pressed against the steel material by filling the mortar, and the elastic material expands and contracts to the interface between the steel material and the mortar and the bag body. Adheres tightly and exhibits water stoppage. Since it is an elastic body, the follow-up property to the deformation of the joint can be secured, so that the water stopping performance can be exhibited even during the deformation. Natural rubber or synthetic rubber can be used as the elastic material for stopping water.

Also, by using a water-swellable material, for example, a water-swellable rubber, as the elastic material for stopping water,
Even if there is a gap between the elastic material and the steel material or mortar (bag), even if there is water leakage through it, the gap can be filled by water absorption and expansion, so that water can be completely stopped. .

[0019]

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

FIG. 1 is a side view of a steel pipe sheet pile 1 according to the present invention applied as a revetment for a sea surface disposal site. In FIG. 1, the left open sea 5 side and the right waste disposal site 6 are shown. At the boundary between the outer wall (outside sea 5 side) as the impermeable wall and the inner wall (disposal site 6 side), a row of steel pipe sheet piles 1 respectively reaches the poorly permeable underground layer and impermeable layer 8 below the seabed It is cast to the depth. Above the poorly permeable underground layer or impermeable formation 8, there is a permeable formation 7.

2 (A) and 2 (B) are enlarged plan views of the steel pipe sheet pile 1 in FIG. 1, and FIG.
A steel pipe main body 1a, a T-shaped male joint 2, and a female joint (hereinafter referred to as a circular female joint) 3 configured to form a circular pocket, and a combination of the T-shaped male joint 2 and the circular female joint 3 An example in which the bag body 10 according to the present invention is applied to a circular pocket of the joint fitting portion 4 made of:

FIG. 2 (B) shows a steel pipe sheet pile 1 provided with a T-shaped male joint 2 and a female joint (hereinafter referred to as a square female joint) 3a having a shape forming a square pocket.
An example in which a bag body 10 according to the present invention is applied to a rectangular pocket of a joint fitting portion 4a formed of a combination of the T-shaped male joint 2 and a square female joint 3a is shown.

FIG. 3A is an enlarged view of a main part of FIG. 2A, and FIG. 3B is an enlarged view of a main part of FIG. 2B. FIG.
(A) and (B) are a perspective view of a water impervious steel sheet pile wall 12 and a perspective view of a bag body 10 constructed of the steel pipe sheet pile 1 of FIG.
2 (A) and 2 (B) are a perspective view of a water impervious steel sheet pile wall 12 and a perspective view of a bag body 10 constructed with the steel pipe sheet pile 1 of FIG. 2 (B).

FIGS. 3A and 3B, FIGS. 2A and 2B,
In the steel pipe sheet pile 1 provided with the joint fitting portions 4 and 4a formed of a combination of the T-shaped male joint 2 and the circular female joint 3 or the square female joint 3a shown in FIGS. 4 and 5, a circular or square female joint 3, 3a is provided. The bag body 10 is inserted into a mortar filling pocket portion 15 formed between the mortar and the T-shaped male joint 2, and the mortar 16 is filled in the bag body 10 as a temporally hardening filler for waterproofing.

The bag 10 for filling the mortar is generally made of elastic nylon fiber or the like. When the mortar is filled inside, the bag 10 is filled with the mortar.
And the bag body 10 spreads and closely adheres to the inner surface steel material of the mortar filling pocket portion 15. On the surface of the bag 10, a linear or band-like elastic material 11 for water stopping is continuously formed in the longitudinal direction of the joint, and forms a water leakage path at the interface between the steel material inside the pocket portion 15 and the bag 10. All are arranged so as to block off, and are fixed by sewing or bonding with an adhesive. Further, as the elastic material 11 for waterproofing, natural rubber or synthetic rubber can be used, and it may be made of a water-swellable material.

When the steel pipe sheet pile 1 is used to construct the water impervious steel sheet pile wall 12 while combining the T-shaped male joint 2 and the joint fitting portions 4, 4a having the circular or square female joints 3, 3a. Will be described.

In the case shown in the figure, the web portion 2b of the T-type male joint 2 is inserted into the slit 13 of the circular or square female joint 3, 3a of the steel pipe sheet pile 1, and the T-type male pipe-fitted steel sheet pile 1 is ground with a hammer or the like. Type 6.

Next, jet water is injected into the circular or square mortar filling pockets 15 in the joint fitting portions 4, 4a to discharge earth and sand clogged in the mortar filling pockets 15, and After the inside of the mortar filling pocket is washed, the long bag 10 according to the present invention is inserted using a push rod to the bottom in the mortar filling pocket 15 in which the space is formed by discharging the earth and sand.

Next, the bag 10 is filled with a mortar or asphalt (hereinafter abbreviated as mortar) 16 as a semi-hard sealing material which is hardened over time. Mortar 1
When filling the mortar 6, the mortar injection tube is inserted to the bottom of the mortar filling pocket 15 and the mortar 16 is filled into the bag 10 from the tube tip while gradually pulling up the mortar injection tube.

By filling the mortar 16 in this way, the bag body 10 spreads, and the surface of the bag body 10 comes into close contact with the steel material inside the joint part. Further, in this case, since the water-stopping elastic material 11 is fixed to the surface of the bag body 10, the water-stopping elastic material 11 is pressed against the steel material on the inner surface of the joint portion by mortar filling, and the elastic material 11 Adheres to the interface between the mortar and the bag, and exhibits water-stopping properties. Since the water-stopping elastic material 11 is an elastic body, it is possible to secure the followability to the deformation of the joint, and to exhibit the water-stopping performance even during the deformation.

Also, by using a water-swellable material, for example, a water-swellable rubber, as the water-stopping elastic material 11, the elastic material 11 and the steel or mortar 1 on the inner surface of the joint should be used.
6 (bag body 10), there is a gap, and even if there is water leakage therethrough, the material absorbs and expands,
Since the gap can be filled, the water can be completely stopped.

As described above, the web portion 2b of the T-shaped male joint 2 is inserted into the slit 13 of the circular or square female joint 3, 3a of the steel pipe sheet pile 1, the bag body 10 is inserted into the pocket portion 15, and the mortar is inserted. While filling 16, the steel pipe sheet piles 1 for constructing the impermeable steel sheet pile wall 12 are sequentially driven and constructed.

By successively driving the steel pipe sheet pile 1 and filling the mortar into the pocket portion 15 of the joint fitting portion,
In the water stopping operation of the joint, as described above, the elastic material 11 for water stopping is fixed to the bag body 10 in advance, and there is no special process for improving the water stopping performance. Performance can be improved.

The water stopping structure of the joint according to the present invention can also be applied to the joint fitting part 4b composed of a PP joint (pipe-pipe joint) shown in FIG. In FIG.
The two mortars formed on the inner peripheral surface of one pipe joint 3b and the outer peripheral surface of the other pipe joint 3b are engaged with each other through the respective slits 13. The bag body 10 with the water-stopping elastic material 11 is inserted into the filling pocket 15 and the bag body 1
0 is filled with 16 mortars.

The intermediate pocket portion 15a, which is located between the pocket portions 15 on both sides and is formed by the inner peripheral surfaces of the two pipe joints 3b, is a small space, and the two pocket portions 15 are filled with mortar. By inserting the bag body 10, the purpose of stopping water is sufficiently achieved, so that the intermediate pocket portion 15 a is directly filled with mortar 16 without the bag body 10. The present invention exhibits excellent water stopping performance even when applied to such a PP joint (pipe-pipe joint).

[0036]

The present invention has the following effects.

According to the present invention, the water-stopping material fixed to the surface of the bag can be pressure-tightly bonded to both the bag and the steel, and is continuous in the longitudinal direction of the joint portion. The water-stopping material is arranged so as to block all water leakage paths at the interface with the bag, inserting the bag into the pocket of the joint fitting portion, and filling the interior of the bag with mortar or concrete. Can be pressed against the steel material on the inner surface of the joint to cut off the water leakage path, thereby improving the water stopping performance of the joint.

Further, since the water-stopping elastic material is fixed to the bag in advance, no special process for improving the water-stopping performance is required in the water-stopping work of the joint, and the joint can be easily formed. Water stopping performance can be improved.

Further, by using a water-swellable material, for example, a water-swellable rubber, as the water-stopping elastic material, there is a gap between the elastic material and the steel material or mortar (bag), Even if there is water leakage therethrough, the gap can be filled by water absorption and expansion, so that water can be completely stopped.

[Brief description of the drawings]

FIG. 1 is an explanatory side view of an embodiment of the present invention, in which a steel pipe sheet pile is applied as a seawall of a sea surface disposal site.

FIG. 2 is an enlarged plan view of a steel pipe sheet pile. FIG. 2A shows an example in which a leakage prevention plate according to the present invention is applied to a joint fitting portion formed by combining a T-shaped male joint and a circular female joint. Show,
Similarly, FIG. 2B shows an example in which the leakage prevention plate according to the present invention is applied to a square female joint.

3A is an enlarged view of a main part of FIG. 2A, and FIG. 3B is an enlarged view of a main part of FIG. 2B.

FIGS. 4A and 4B are a perspective view of a water-impervious steel sheet pile wall constructed of the steel pipe sheet pile of FIG. 2A and a perspective view of a bag body.

5 (A) and 5 (B) are a perspective view of a water impervious steel sheet pile wall constructed of the steel pipe sheet pile of FIG. 2 (B) and a perspective view of a bag body.

FIG. 6 is an enlarged view of a main part in a case where the water stopping structure of the joint according to the present invention is applied to a PP joint (pipe-to-pipe joint).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel pipe sheet pile 1a Steel pipe main body 2 T-shaped male joint 2a Flange part 2b Web part 3 Circular female joint 3a Square female joint 4 Joint fitting part 4a Joint fitting part 5 Open sea 6 Waste disposal site 7 Water-permeable layer 8 Water-impermeable Geological layer 10 Bag body 11 Elastic material for waterproofing 12 Water impervious steel sheet pile wall 13 Slit 15 Pocket part 16 Mortar

 ──────────────────────────────────────────────────続 き Continued on the front page (71) Applicant 000001052 Kubota Co., Ltd. 1-47, Shikitsu-Higashi 1-chome, Naniwa-ku, Osaka-shi, Osaka (71) Applicant 000002118 Sumitomo Metal Industries, Ltd. 4 Kitahama, Chuo-ku, Osaka-shi, Osaka No. 5-33 (72) Inventor Masataka Kinoshita 20-1 Shintomi, Futtsu City Nippon Steel Corporation Technology Development Headquarters (72) Inventor Shoichi Torizaki 2-6-3 Otemachi, Chiyoda-ku, Tokyo New Nippon Steel Corporation (72) Inventor Hajime Iwakura 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Yugo Oka 2-2-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Hibiya Kokusai Building Kawasaki Steel Corporation (72) Inventor Ken Oki 2-2-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Hibiya International Building Kawasaki Steel Corporation (72) Inventor Manabu Asogawa Chuo-ku, Tokyo Motohashi Muromachi 3-1-3 stock company within the Kubota (72) inventor Kunio Masahiro, Chuo-ku, Osaka-shi Kitahama 4-chome No. 5 No. 33 Sumitomo Metal Industries, Ltd. in the F-term (reference) 2D049 EA01 FB03 FB14 FC02 FD04 FD08

Claims (4)

[Claims] 1. A bag body having a water-stopping elastic material fixed to the surface thereof, which is continuous in a longitudinal direction of a joint, is inserted into a pocket formed in a joint fitting portion of a steel sheet pile such as a steel sheet pile and a steel sheet pile. A water-tight structure for a steel sheet pile joint, characterized in that the inside of the bag is filled with a water-hardening time-hardening filler such as mortar or concrete. 2. A bag body having a water-stopping elastic material fixed on the surface thereof, which is continuous in the longitudinal direction of the joint, is inserted into a pocket formed in a joint fitting portion of a steel sheet pile such as a steel sheet pile and a steel sheet pile. By filling the inside of the bag body with a water-stopping time-curable filler such as mortar or concrete, the elastic material for water stoppage and the steel material on the inner surface of the joint portion are brought into pressure contact with each other. A method of constructing a joint fitting part with high water blocking properties. 3. A bag to be inserted into a pocket formed in a joint fitting portion of a steel sheet pile such as a steel sheet pile and a steel pipe sheet pile, and filled therein with a water-hardening time-hardening filler such as mortar or concrete. A bag body, characterized in that a water-stopping elastic material continuous in the longitudinal direction of the joint is fixed to a surface of the bag body. 4. The bag according to claim 1, wherein the elastic material for stopping water in the bag comprises a water-swellable material. Bag.