JP4643471B2 - Steel underground wall - Google Patents

Description

  The present invention relates to a water stop unit that can be used in an underground continuous wall in which a plurality of steel continuous wall members having joint portions are built in a excavation groove, and a steel underground continuous wall using the same.

As a method for constructing the underground continuous wall, the so-called SMW method, TRD method, CSM method, etc., the in-situ soil mixing and mixing soil cement method, the reinforced concrete underground continuous wall method with stable liquid excavation, and the steel ground There are medium continuous wall methods. The in situ soil mixing and mixing soil cement method is a method of creating a soil cement wall in the ground by mixing and mixing in situ soil and cement milk. In addition, there are two types of steel underground continuous wall construction methods, and Method-I is to solidify concrete or soil cement after excavating into a groove shape while stabilizing the groove wall of the excavation groove with a stabilizing liquid. This is a construction method in which NS-BOX is built by substituting the material with a stable solution with tremy, and an underground continuous wall is constructed. As construction method-II, TRD construction method or CSM construction method, which is a soil cement mixing soil cement construction method, is used. This is a construction method in which an in-situ soil mixing and mixing soil cement wall having an equal wall thickness is constructed, and NS-BOX, which is a steel underground continuous wall member, is built therein to construct an underground continuous wall.

  In these steel underground continuous wall construction methods, steel continuous wall members 50 and 60 made of steel having an H-shaped cross section as shown in FIG. 9 are used. The steel continuous wall member 50 is provided with joints 52 on both sides of a flange 51. The joint 52 is formed in a cylindrical shape having a cavity 53 therein and a slit 54 extending in the material axis direction. The steel continuous wall member 60 has a joint 62 having a T-shaped cross section on both sides of the flange 61, and the joint 62 is formed in a shape that can be inserted into the cavity 53 and the slit 54 of the joint 52.

  In the past, underground continuous walls constructed by the above-mentioned methods have been used only as temporary mountain retaining walls or water blocking walls, but in recent years, underground continuous walls and permanent underground walls have been used. Synthetic structures with integrated structures are being considered or implemented. In particular, as shown in FIG. 9, a steel underground wall formed by connecting steel continuous wall members 50 and 60 has a relatively large structural strength. And is expected to constitute part of the main body structure of the retaining wall.

By the way, structures such as box culverts and retaining walls are provided with concrete joints and expansion joints, and in order to prevent water leakage from them, water stop methods using water stop plates etc. have been devised. The water stop method has already been generalized. However, when the steel underground wall as shown in FIG. 9 is used as a part of the main body of the box culvert or retaining wall structure, the steel continuous wall member is fitted between the joints at corresponding locations such as expansion joints. Although not connected, a non-connected portion is formed, but a water stop method for this non-connected portion has not yet been proposed.
Patent Document 1 describes a waterproofing method for a synthetic underground wall in which a columnar underground wall and a reinforced concrete wall are integrated, but this waterproofing method is used to stop unconnected portions of a steel continuous wall member. It is not applicable to water.
JP 2003-301456 A

  The present invention has been made in view of the above-mentioned problems, and the object thereof is to realize a good water-stopping property relatively easily in a non-connected portion in which adjacent steel continuous wall members are not fitted between joints. It is providing the water stop unit which is these, and the steel underground continuous wall using the same.

The present invention has been achieved by the above-mentioned object, and the gist thereof is a plurality of steel continuous walls provided with joint portions on both sides, which are built in a fluid solidified material in a excavation groove formed in the ground. a connecting structure in a non-connecting portion parts, the on portion of the non-connecting portion with a striking seam or joint material liquid solidifying material, a long formed of a material containing a synthetic resin material waterstop A water stop unit composed of a connecting member fixed to both ends is fitted and connected by a joint portion of the steel continuous wall portion .
Moreover, this invention provides the steel underground continuous wall characterized by the water-stop board formed from the material containing the said synthetic resin material having a cylindrical expansion-contraction flexible part.

  (1) In the water stop unit of the present invention, the connection member is fixed on both sides of the water stop plate, and the connection member has a fitting portion that can be fitted to the joint portion of the steel continuous wall member. At the time of construction, if the fitting part of the water stop unit is fitted to the joint part of the steel continuous wall member and built, the misalignment of the water stop unit can be prevented and good water stop is relatively easy. Is obtained.

  (2) Since the water stop unit of the present invention is formed by integrating a pair of connection members fixed to both sides of the water stop plate in a parallel arrangement, two joints of adjacent steel continuous wall members It is possible to build in the part with a single effort, improving the workability.

  (3) If the connecting member of the water stop unit is formed of a material having a specific gravity greater than that of the fluidized solidified material such as soil cement or concrete, the waterstop unit can be submerged in the fluidized solidified material relatively easily. The workability at the time of erection into the joint part of the steel continuous wall member is improved.

  (4) If the water stop plate of the water stop unit has an expansion / contraction flexible part, even if a displacement occurs between adjacent steel continuous wall members, the displacement will follow the displacement to a predetermined length, Water stoppage becomes feasible.

  (5) Since the steel underground wall of the present invention is constructed by fitting the water stop unit to the joint portion in the unconnected portion of the steel continuous wall member, the water stop plate is set at a desired location. A steel underground continuous wall that can be placed accurately and has good water blocking properties is obtained relatively easily.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

Fig.1 (a)-(c) is the figure which looked at the water stop unit 10A-10C of this invention from the top, respectively. Here, in the water stop units 10A to 10C, connecting members 12a and 13a are attached to both sides of a long water stop plate 11 made of a material including a synthetic resin material by fixing members 14 such as bolts and nuts. The fitting members 12b and 13b are formed on one end side of the connecting members 12a and 13a, and these fitting portions 12b and 13b are formed as shown in FIGS. It can be fitted into the joint portions 52 and 62 of the steel continuous wall members 50 and 60.
That is, in the steel continuous wall member 50, as shown in FIG. 2 (a), the joint 52 has a hollow 53 and the slit 54 is formed in a cylindrical shape extending in the material axis direction. The wall members 50 and 50 are installed at predetermined intervals, and the water stop unit 10A of FIG. 1A is provided by fitting the fitting portions 12b on both sides to the joints 52 of the steel continuous wall members 50 and 50. .
Further, as shown in FIG. 2B, the steel continuous wall member 60 is provided with joints 62 having a T-shaped cross section on both sides of the flange 61, and the steel continuous wall members 60, 60 are spaced apart from each other by a predetermined distance. The water stop unit 10B of FIG. 1B is provided by fitting the fitting portions 13b on both sides to the joints 62 of the steel continuous wall members 60, 60.
Furthermore, in FIG.2 (c), when the steel continuous wall members 50 and 60 from which a joint shape differs are built at predetermined intervals, the water stop unit 10C of FIG.1 (c) is attached here, The water stop unit 10 </ b> C is provided by fitting the fitting portions 12 b and 13 b to the joints 52 and 62 of the steel continuous wall members 50 and 60.

Moreover, it is preferable to form the connection members 12a and 13a of the water-stop units 10A to 10C from a material having a specific gravity larger than that of a fluidized solidified material such as soil cement or concrete, for example, a steel material. Despite being formed from a material containing a relatively lightweight synthetic resin material, the water stop units 10A to 10C can be submerged relatively easily in the fluidized solidified material due to the weight of the connecting members 12a and 13a. The steel continuous wall members 50, 60 can be smoothly built into the joints 52, 62.
Although three types of water-stop units 10A to 10C are illustrated in FIG. 1, only the shapes of the fitting portions 12b and 13b are different, and the basic configuration is almost the same. In particular, FIG. In the water stop unit 10C of c), both types of connection members 12a and 13a are used in combination.

  Next, FIGS. 3A to 3C are views of the water-stopping units 20A to 20C as viewed from above, which is an embodiment different from that in FIG. Except for the above, it is formed in substantially the same manner as FIG. That is, the connecting members 22a and 23a are formed by two plate members such as steel plates arranged in parallel, and the water stop plate 11 is sandwiched between the two plate members and fixed by the fixing member 14. Yes. In FIG. 3, the same components as those in FIG.

Next, the water stop units 30 and 32 of FIGS. 4 (a) and 4 (b) are different embodiments from FIGS. 1 and 3, except for the water stop plate 31, which is substantially the same as FIGS. 1 and 2, respectively. It is formed. Therefore, also in FIG. 4, the same components are denoted by the same reference numerals, and description thereof will be omitted.
The water stop plate 31 shown in FIGS. 4A and 4B is provided with a cylindrical expansion / contraction flexible portion 31b substantially at the center of a plate-like portion 31a formed of an elastic material such as rubber or synthetic resin. It is a thing. The connection members to be fixed to the both ends of the water stop plate 31 use the connection members 12a and 13a together as shown in FIG. 4 (a), or use the connection members 22a and 23a together as shown in FIG. 4 (b). They can be combined as shown in FIGS. 1A and 1B and FIGS. 2A and 2B.

  In the water stop unit 34 of FIG. 5, the connection members 35 attached to both sides of the water stop plate 31 are formed from a thick plate material 35a such as a steel plate, and a groove 35b is formed on one end side thereof. The plate-like portion 31 a of the plate 31 is fitted and fixed by the fixing member 14. If the connection member 35 is formed from a thick plate material 35a such as a steel plate in this way, the water stop unit 34 can be built in the fluidized solidified material relatively easily by its own weight.

Next, FIG. 6 shows a water stop unit 38 in which a pair of the water stop units 10A of FIG. 1A are arranged in parallel and the connecting members 12a are connected by a connecting plate 36, which is also shown in FIG. It can be installed between the steel continuous wall members 50 and 50 in the same manner as in a). Thus, what united a pair of water stop unit 10A can shorten the effort of the construction work to the steel connection wall member 50. FIG.
It should be noted that a pair of other water stop units in FIGS.

Next, steel underground continuous walls 40A and 40B will be described with reference to FIGS.
The steel underground underground walls 40A and 40B are integrated with the concrete inner wall 41 to constitute a part of the main body structure part, and FIGS. 7A and 7B particularly show the structural joint part. It is a thing.
In FIG. 7 (a), the steel joint wall members 50, 50 built in the soil cement 42 are not connected by the joints 52, 52 at the structural joint portion, and the two joints in the unconnected portion 43 are connected. A water stop unit 44 is embedded between the 52 and 52 to form a steel underground wall 40 </ b> A, and a joint material 45 is embedded in the concrete inner wall 41. Here, in the water stop unit 44, the connection members 12a and 12a are fixed to both ends of the water stop plate 31 in FIG. 4A, and the water stop plate 31 has a flexible elastic part 31b. The fitting portion 12b of the member 12a is fitted into the joint 52 of the steel continuous wall member 50.
In the steel underground continuous wall 40A, the fitting portion 12b of the water stop unit 44 is fitted to the joints 52 and 52 of the steel continuous wall members 50 and 50, so that the water stop unit 44 of the water stop unit 44 at the time of construction is installed. The misalignment can be prevented, and the water stop unit 44 can be built relatively easily.

  7A, the steel continuous wall members 50, 50 have the joints 52, 52 on the flanges 51, 51. In FIG. 7B, the steel having the joints 56, 76 on the webs 55, 75. The steel underground continuous wall 40B using the continuous wall members 50, 70 was illustrated. Also in the steel underground continuous wall 40B, the fitting portion 12b of the water stop unit 44 is fitted to the joints 56 and 76 of the steel continuous wall members 50 and 70 in the non-connected portion 43 of the steel continuous wall members 50 and 70. As shown in FIG. 7 (a), it is possible to achieve the labor saving of the erection work and the effect of preventing misalignment.

  FIG. 8 is a horizontal cross-sectional view of a steel underground wall 40 </ b> C in which the water stop unit 11 is provided at the joint 47. The steel underground continuous wall 40C is a steel continuous wall member 50, 60 built in a fluidized solidified material 46 such as soil cement or concrete, and at the joint 47, the steel continuous wall member 50, 50 is not connected between the joints 52 and 52. In this unconnected portion, the webs 55 and 55 of the steel continuous wall members 50 and 50 are provided with joints 56 and 56, and the fitting portion 12b of the water stop unit 11 is fitted to these joints 56 and built. It is included. Also at the joint 47, the labor saving of the erection work at the time of construction of the water stop unit 11 and the effect of preventing misalignment are obtained.

(A)-(c) is the figure which looked at the water stop unit of this invention from the top, respectively. (A)-(c) is the figure which made each water stop unit fit to the joint part of steel connection wall members. (A)-(c) is embodiment of the water stop unit different from FIG. (A) (b) is an embodiment of a water stop unit different from FIGS. 1 and 3. 5 is an embodiment of a water stop unit different from those of FIGS. FIG. 6 is an embodiment of a water stop unit different from those of FIGS. 1, 3, 4 and 5. (A) (b) is sectional drawing of the steel-made underground continuous wall of this invention. It is an embodiment of the steel underground wall different from FIG. It is sectional drawing of the conventional steel underground underground wall.

Explanation of symbols

10A-10C Water stop unit 11 Water stop plate 12a, 13a Connection member 12b, 13b Fitting part 20A-20C Water stop unit 22a, 23a Connection member 30, 32 Water stop unit 31 Water stop plate 34 Water stop unit 35 Connection member 36 Connection plate 38 Water stop unit 40A, 40B, 40C Steel underground continuous wall 42 Soil cement 43 Non-connected portion 44 Water stop unit 46 Fluidized solidified material 50 Steel continuous wall member 51 Flange 52 Joint 60 Steel continuous wall member 70 Steel continuous wall member 75 Web 76 Joint

Claims (2)

A connection structure in a non-connection portion of a plurality of steel continuous wall portions provided with joint portions on both sides built in a fluid solidified material in a excavation groove formed in the ground,
The water stop which consists of the connection member fixed to the both ends of the long water stop board formed from the material containing a synthetic resin material in the location of the said joint part of the said liquid solidification material or the joint part with a joint material A steel underground continuous wall characterized in that the unit is fitted and connected by a joint portion of the steel continuous wall portion. The steel underground continuous wall according to claim 1, wherein the water stop plate formed of a material including the synthetic resin material has a cylindrical expansion / contraction flexible portion.