JP6868417B2 - How to build hollow segments, annular structures, water stop wall structures and water stop wall structures - Google Patents

Description

The present invention relates to a hollow segment, an annular structure in which a plurality of the hollow segments are connected, and a water blocking wall structure in which a plurality of the annular structures are stacked in the vertical direction.

When reinforcing or repairing a pier constructed in water such as a river, it is necessary to construct a water blocking wall in order to block the flow of the river and secure a predetermined work space around the pier.
In such a water blocking wall, a plurality of liner plates formed of a steel plate or the like in a flat plate shape or an arc shape having a predetermined curvature are connected to each other in the circumferential direction and the height direction of the pier to surround the pier. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 9-221760

However, a water blocking wall in which liner plates are connected in the circumferential direction and the height direction of the pier, such as the water blocking wall of Patent Document 1, does not have sufficient strength against, for example, hydrostatic pressure. Therefore, in order to support the water stop wall from the inside, it is necessary to install a plurality of support works (for example, a girder) between the water stop wall and the pier over the circumference of the pier. Since the support work is installed in the work space, it may interfere with the reinforcement / repair work, which may reduce the work efficiency.
Further, when constructing a water blocking wall by stacking a plurality of liner plates in the height direction, the liner plates are connected and fixed in the height direction by a diver in water, and a lot of underwater work by the diver is required. Was there. Therefore, the construction of the water blocking wall in Patent Document 1 has a problem that the workability is poor and it takes a long construction period to form the water blocking wall.

Therefore, the present invention has been made in view of the above problems, and includes a hollow segment having an increased cross-sectional coefficient and rigidity, an annular structure in which a plurality of the hollow segments are connected, and a plurality of the annular structures. It is an object of the present invention to provide a waterproof wall structure constructed by stacking.

In order to achieve the above object, the present invention is a hollow segment constituting a water blocking wall structure that surrounds a structure that is at least partially submerged with a space, and forms an outer wall of the water blocking wall structure. The outer plate, the inner plate forming the inner wall of the waterproof wall structure, and the wall portion covering the space between the outer plate and the inner plate are provided, and the outer plate, the inner plate, and the wall are provided. It is characterized in that an internal space closed to the outside is defined by the part.

Further, it is preferable that the buoyancy forming member is provided in the internal space.

Further, it is preferable that the outer plate and the inner plate have a wavy plate portion that repeats undulations.

Further, the outer plate and the inner plate have a rectangular shape in a plan view, and the wall portion includes a longitudinal wall surface plate forming a wall portion along the longitudinal direction of the outer plate and the inner plate, and the wall portion. The outer plate is provided with a short wall plate forming a wall portion along the lateral direction of the inner plate, and the longitudinal wall plate has a plurality of holes along the longitudinal direction at both ends in the lateral direction. It is preferable that the short wall plate is formed with a plurality of holes along the short direction at both ends in the short direction.

Further, at least one of the surface forming the outer wall of the outer plate and the surface forming the inner wall of the inner plate is formed with an opening connecting the outside and the inner space, and the outer plate and the inner space are formed. The inner plate preferably includes an opening / closing member that can open / close the opening.

Further, in order to achieve the above object, the present invention is an annular structure constituting a water blocking wall structure formed by surrounding a structure that is at least partially submerged with water at intervals, and is a water blocking wall. The outer plate comprises an outer plate forming an outer wall of the structure, an inner plate forming an inner wall of the waterproof wall structure, and a wall portion covering a space between the outer plate and the inner plate. It is characterized in that a plurality of hollow segments in which an internal space closed to the outside by the inner plate and the wall portion are defined are connected in the horizontal direction.

Further, in order to achieve the above object, the present invention is a water blocking wall structure formed by surrounding a structure which is at least partially submerged with an interval, and has an outer plate forming an outer wall and an inner wall. A wall portion that covers a space between the outer plate and the inner plate is provided, and an inner space that is closed to the outside by the outer plate, the inner plate, and the wall portion is defined. It is characterized in that a plurality of annular structures formed by connecting a plurality of formed hollow segments in the horizontal direction are stacked in the vertical direction.

According to the present invention, the cross-sectional coefficient and rigidity of the water blocking wall structure can be increased.

It is the schematic of the water-stopping wall structure which concerns on embodiment of this invention. It is a perspective view which shows the hollow segment which concerns on embodiment of this invention by removing a part thereof. It is a perspective view of the outer (inner) plate of the hollow segment shown in FIG. It is a perspective view which shows by removing a part of the hollow segment which concerns on the practice of this invention in the corner part of a water stop wall structure. It is sectional drawing for demonstrating the structure of the hollow segment shown in FIG. It is a top view of the upper plate shown in FIG. It is a top view of the plan of the water stop wall structure which concerns on embodiment of this invention. It is a top view of the plan of the conventional water-stopping wall structure.

A preferred embodiment of the present invention will be described with reference to the drawings. The embodiments shown below are examples, and various embodiments can be taken within the scope of the present invention.

<Water stop wall structure>
FIG. 1 is a schematic view of a water blocking wall structure according to an embodiment of the present invention. FIG. 2 is a perspective view showing a hollow segment according to an embodiment of the present invention in a state in which a part thereof is removed so that an internal space can be seen. FIG. 3 is a perspective view of the outer (inner) plate of the hollow segment shown in FIG. FIG. 4 is a perspective view of a hollow segment according to the implementation of the present invention at the corner portion of the water blocking wall structure. FIG. 5 is a cross-sectional view for explaining the configuration of the hollow segment shown in FIG. FIG. 6 is a plan view of the upper plate shown in FIG. FIG. 7 is a schematic plan view of the water blocking wall structure according to the embodiment of the present invention.

As shown in FIG. 1, the water blocking wall structure 100 is used to form a work space ws around the pier bl when reinforcing or repairing the pier bl erected in water such as a river or the sea. It is formed around the pier bl. In the water blocking wall structure 100, a plurality of hollow segments are connected in the horizontal direction hr to form an annular structure 1 having a rectangular shape in a plan view, and a plurality of annular structures 1 are stacked and connected on the water surface wl along the vertical direction v. It is assembled in a tubular shape.
The hollow segment includes a substantially rectangular parallelepiped hollow segment 3 and a hollow segment 4 that connects the hollow segments 3 at a corner portion C so as to form a right angle to each other (hereinafter deleted).

[Hollow segment 3]
As shown in FIG. 2, the hollow segment 3 includes an outer plate 30 forming the outer wall of the water blocking wall structure 100, an inner plate 32 forming the inner wall of the water blocking wall structure 100, the outer plate 30 and the outer plate 30. It is provided with a wall portion that covers the space between the inner plates 32. In the following figures, for convenience of explanation, the length direction (longitudinal direction) of the hollow segment 3 and the hollow segment 4 is "l", the height direction (short direction) is "h", and the width direction (thickness direction). ) Is "w".
The wall portion covers the hollow segment 3 from the upper plate 34 covering the hollow segment 3 from the upper h1 in the height direction h2, the lower plate 36 covering the hollow segment 3 from the lower h2, and the hollow segment 3 from the sides l1 and l2 in the length direction l. It is provided with two side plates 38, 39.

The hollow segment 3 is formed in a box shape by defining a hollow internal space 3is by an outer plate 30, an inner plate 32, an upper plate 34, a lower plate 36, and side plates 38 and 39.

(Outer plate)
As shown in FIG. 3, the outer plate 30 is formed in a rectangular shape in a plan view, and is formed of, for example, a linear steel sheet pile having a wavy plate portion 30a formed by bending a steel plate into a wavy shape. It is a so-called liner plate. The corrugated plate portion 30a is formed by undulating along the height direction h in the thickness direction w of the outer plate 30. The outer plate 30 has flat portions 30b at both ends of the upper h1 and the lower h2 in the height direction h of the corrugated plate portion 30a.

The outer plate 30 is integrally formed by welding a longitudinal flange 30c obtained by bending a flat portion 30b along the length direction l and a separate steel plate at both ends in the length direction l, and is formed integrally with the longitudinal flange of the upper h1. It has a short flange 30d extending between the 30c and the longitudinal flange 30c of the lower h2.
Although the longitudinal flange 30c is integrally formed with the outer plate 30, it may be formed separately from the outer plate 30 and the steel plate may be fixed by welding or the like.

An opening (not shown) is formed in the flat portion 30b of the lower side h2 of the outer plate 30 in the height direction h. The opening is provided with an opening / closing member 31 that adjusts the connection between the internal space 3is of the hollow segment 3 and the outside (for example, air or water) by opening / closing the opening. The opening / closing member 31 may be, for example, a valve member that closes the opening. Further, the opening / closing member 31 may be provided on the flat portion 30b of the upper h1 of the outer plate 30.

(Inner plate)
The inner plate 32 is arranged so as to face parallel to the outer plate 30. The inner plate 32 includes a corrugated plate portion 32a, a flat portion 32b, a longitudinal flange 32c, a short flange 32d, and an opening / closing member 33. Since the configuration of the inner plate 32 is the same as that of the outer plate 30, only the reference numerals are given in FIG. 2 and the description of the specific configuration of the inner plate 32 will be omitted.

(Upper plate)
As shown in FIG. 2, the upper plate 34 (longitudinal wall plate) is formed of a rectangular steel plate in a plan view, and the space between the outer plate 30 and the inner plate 32 is formed from the upper h1 in the height direction h. Covering. The upper plate 34 is welded along the longitudinal flanges 30c and 32c of the upper h1 of the outer plate 30 and the inner plate 32. The ends of the upper plate 34 in the width direction w protrude from the outer plate 30 and the inner plate 32, and a plurality of through holes 34a are formed at equal intervals along the length direction l in the protruding portions. There is.
The through hole 34a is for inserting a bolt of a connecting tool (not shown) for connecting with the hollow segment 3 to be stacked on the upper h1 when the hollow segments 3 are stacked.

(Lower plate)
The lower plate (longitudinal wall plate) 36 is arranged so as to face parallel to the upper plate 34. The lower plate 36 is formed of a rectangular steel plate in a plan view, and covers the space between the outer plate 30 and the inner plate 32 from the lower h2 in the height direction h. The lower plate 36 is welded along the longitudinal flanges 30c, 32c of the lower h2 of the outer plate 30 and the inner plate 32. The ends of the lower plate 36 in the width direction w protrude from the outer plate 30 and the inner plate 32, and a plurality of through holes 36a are formed at equal intervals along the length direction l in the protruding portions. ing.
The through hole 36a is for inserting a bolt of a connecting tool (not shown) for connecting with the hollow segment 3 of the lower h2 when the hollow segments 3 are stacked.

(Side plate)
As shown in FIG. 2, the side plates (short wall plates) 38 and 39 are formed of rectangular steel plates in a plan view, and the space between the outer plate 30 and the inner plate 32 is formed on the side l1, It covers from l2. The side plates 38 and 39 are welded to the short flanges 30b and 32d of the outer plate 30 and the inner plate 32 along the height direction h, and the upper plate 34 and the lower plate are welded along the width direction w. It is welded to the edge of 36.
The ends of the side plates 38 and 39 in the width direction w protrude from the outer plate 30 and the inner plate 32, and a plurality of through holes 38a and 39a are formed in the protruding portions along the height direction h. It is formed at intervals.
The through holes 38a and 39a are for inserting bolts of a connecting tool (not shown) for connecting the hollow segments 3 to the adjacent hollow segments 3 when the hollow segments 3 are connected to each other in the horizontal direction hr. Further, when the hollow segment 3 is adjacent to the hollow segment 4 in the corner portion C, a bolt of a connecting tool (not shown) for connecting to the hollow segment 4 is inserted into the through holes 38a and 39a. ..

(Buoyancy forming member)
The hollow segment 3 includes a buoyancy forming member 5 in its internal space 3is. The buoyancy forming member 5 is formed of a foam, for example, a synthetic resin foam such as polyurethane foam, polystyrene foam, polyethylene foam, polypropylene foam, or styrene foam. Further, the air existing in the internal space 3is at the time of manufacturing the hollow segment 3 may be used as the buoyancy forming member.

[Hollow segment 4]
The hollow segment 4 connects the hollow segments 3 which are in a positional relationship orthogonal to each other (see FIG. 7). As shown in FIGS. 4 and 5, in the hollow segment 4, in the corner portion C of the water blocking wall structure 100 or the annular structure 1, the outer wall portion 40 forming the outer wall of the water blocking wall structure 100 and the water blocking portion 40 and the water blocking portion 40 are formed. It includes an inner wall portion 42 that forms the inner wall of the wall structure 100, and a wall portion that covers the space between the outer wall portion 40 and the inner wall portion 42.
The wall portion includes an upper wall portion 44 that covers the hollow segment 4 from the upper h1 in the height direction h, a lower wall portion 46 that covers the lower h2, and two lateral surfaces that cover the hollow segment 4 from the sides l3 and l4. The plates 48 and 49 are provided. The hollow segment 4 is bent at a substantially right angle in the middle in the length direction l, and has two axes x that are orthogonal to each other.
In the hollow segment 4, the hollow internal space 4is is defined by the outer wall portion 40, the inner wall portion 42, the upper wall portion 44, the lower wall portion 46, and the side wall portions 48, 49, and is shaped like a box in a plan view. It is formed.

(Outer wall)
The outer wall portion 40 includes two outer plates 41 arranged so as to be orthogonal to each other, and the outer plate 41 is welded to and connected to an angle member (for example, equilateral angle steel or the like) A, respectively. The outer plate 41 is formed in a rectangular shape in a plan view, and is, for example, a so-called liner plate formed of a linear steel sheet pile having a wavy plate portion 41a formed by bending a steel plate into a wavy shape. The corrugated plate portion 41a is formed so as to undulate in the thickness direction w of the outer plate 41 along the height direction h. The outer plate 41 has flat portions 41b at both ends of the upper h1 and the lower h2 in the height direction h of the corrugated plate portion 41a.

The outer plate 41 is integrally formed by welding a longitudinal flange 41c formed by bending a flat portion 41b along the length direction l and separate steel plates at both end portions in the length direction l. It has a hand flange 41d.
The longitudinal flange 41c is formed integrally with the corrugated plate portion 41a, but may be formed separately from the corrugated plate portion 41a and the steel plate may be fixed by welding or the like.

The corrugated plate portion 41a has an opening (not shown) formed in the flat portion 41b on the lower side h2 in the height direction h. The opening is provided with an opening / closing member 41v that adjusts the connection between the internal space 4is of the hollow segment 4 and the outside (for example, air or water) by opening / closing the opening. The opening / closing member 41v may be, for example, a valve member that closes the opening. Further, the opening member 41v may be provided on the flat portion 41b on the upper side h1 of the outer plate 41.

(Inner wall)
The inner wall portion 42 includes two inner plates 43 arranged so as to be orthogonal to each other, and the inner plates are arranged so as to face each other in parallel with each outer plate 41. The inner plate 43 is welded and connected to an angle member (for example, an equilateral chevron member, etc.) A, respectively. The length of the inner plate 43 is formed shorter than the length of the outer plate 41.
The inner plate 43 includes a corrugated plate portion 43a, a flat portion 43b, a longitudinal flange 43c, a short flange 43d, and an opening / closing member 43v. Since the configuration of the inner plate 43 is the same as the configuration of the outer plate 40 except for the dimensions in the length direction l, only the reference numerals are given in FIG. 4, and the description of the specific configuration of the inner plate 43 will be omitted.

(Upper wall)
The upper wall portion 44 includes two upper plates 45, 45 welded so that the axes x are orthogonal to each other. The upper plate 45 is formed of a substantially trapezoidal steel plate in a plan view, and covers the space between the outer plate 41 and the inner plate 43 from the upper h1 in the height direction h.
The upper plate 45 is not visible in FIG. 4, but is welded along the longitudinal flanges 41c and 43c of the upper h1 of the outer plate 41 and the inner plate 43. The ends of the upper plate 45 in the width direction w protrude from the outer plate 41 and the inner plate 43, and a plurality of through holes 45a are formed at equal intervals along the length direction l in the protruding portions. There is.
The through hole 45a is for inserting a bolt of a connecting tool (not shown) for connecting to the hollow segment 4 stacked on the upper side when the hollow segments 4 are stacked.

As shown in FIG. 6, the length of the side 45l of the upper plate 45 extending along the outer plate 41 is formed to be larger than the length of the side 45s extending along the inner plate 43. Further, the side 45 wl of the upper plates 45 to be welded to each other extending along the width direction w extends diagonally between the side 45 l and the side 45 s, and the side 45 sw facing the side 45 lw is a side. It extends at right angles to 45 liters and sides 45 s.

(Lower wall)
The lower wall portion 46 includes two lower plates 47 that are welded so that the axes x are orthogonal to each other. The lower plate 47 is provided with a through hole 47a, has a side 47l, a side 47s, a side 47lw, and a side 47sw, and is formed in a substantially trapezoidal shape in a plan view. Since the specific configuration of the lower plate 47 is the same as that of the upper plate 45, only the reference numerals are shown in FIG. 6 and the specific description is omitted.
The through hole 47a is for inserting a bolt of a connecting tool (not shown) for connecting the hollow segment 4 with the lower hollow segment 4 when the hollow segments 4 are stacked in the vertical direction v.

(Wall wall)
The side plates (short wall plates) 48 and 49 cover the hollow segment 4 from the sides 45sw and 47sw on the opposite sides of the upper plate 45 and the lower plate 47 to be welded to each other. The side plates 48 and 49 are formed of a steel plate having a rectangular shape in a plan view. The side plates 48 and 49 are welded to the short flanges 41c and 43c of the outer plate 41 and the inner plate 43, and are welded to the edges of the upper plate 45 and the lower plate 47 along the width direction w. ing.
The ends of the side plates 48 and 49 in the width direction w protrude from the outer plate 41 and the inner plate 43, and a plurality of through holes 48a and 49a are formed in the protruding portions along the height direction h. It is formed at intervals.
The through holes 48a and 49a are for inserting bolts of a connecting tool (not shown) for connecting the hollow segment 4 to the hollow segment 3 in the horizontal direction hr at the corner portion C.

(Buoyancy forming member)
The hollow segment 4 includes a buoyancy forming member 6 in its internal space 4is. Since the specific configuration of the buoyancy forming member 6 is the same as that of the buoyancy forming member 5 of the hollow segment 3, the description thereof will be omitted.

[Construction of waterproof wall structure]
Next, the construction of the water blocking wall structure 100 according to the embodiment of the present invention will be described. When reinforcing or repairing a pier bl standing in water such as a river or the sea, it is necessary to temporarily secure a dry work space ws around the pier bl as shown in FIG. The temporary construction method for securing the working space ws is generally called an underwater deadline or a temporary deadline, and is particularly called a deadline construction method in the present invention. The water blocking wall structure 100 is used in the deadline method.
Generally, the water blocking wall structure 100 formed by the deadline method is sufficient for hydrostatic pressure due to surrounding water, running water pressure due to water flow, wave pressure due to waves, etc., although it differs depending on the facility environment such as a river or the sea. Strength and water stopping performance are required.
Before the construction of the water blocking wall structure 100, a steel vertical frame 8 is driven into the bottom of the water around the pier bl at a predetermined interval. Next, a girder 9 is installed between the vertical frame 8 and the pier bl.

Subsequently, the hollow segment 3 is lowered onto the water surface wl from the pontoon loaded with the hollow segment 3 and the hollow segment 4. Since the hollow segment 3 is filled with the buoyancy forming member 5 in the internal space 3is, the hollow segment 3 maintains a floating state without being completely submerged by the buoyancy of the buoyancy forming member 5.
The operator brings the side plates 38; 39 of the plurality of hollow segments 3 floating on the water surface wl into contact with each other so that the through holes 38a; 39a are aligned with each other, and inserts a bolt into the through holes 38a; 39a. The plurality of hollow segments 3 are connected to each other by fastening the nuts to the bolts.
When forming the corner portion C of the annular structure 1, the hollow segment 4 is lowered onto the water surface wl. Since the hollow segment 4 is filled with the buoyancy forming member 6 in the internal space 4is, the hollow segment 4 maintains a floating state without being completely submerged by the buoyancy of the buoyancy forming member 6.
The operator aligns the side plates 48; 49 of the hollow segment 4 and the side plates 38; 39 of the hollow segment 3 floating on the water surface wl with the through holes 38a; 39a, 48a; 49a, respectively. The hollow segment 4 and the hollow segment 3 are connected to each other by inserting the bolts into the through holes 38a; 39a, 48a; 49a and fastening the nuts to the bolts.

Thus, the operator can form the rectangular annular structure 1 by connecting the plurality of hollow segments 3 and the hollow segments 4 to each other in the horizontal direction hr on the water surface wl, so that the pier bl has a large scale. It is not necessary to temporarily install a scaffold and an elevating device or the like for suspending the hollow segments (hollow segment 3 and hollow segment 4). Further, the annular structure 1 can be formed on the water surface wl so as to surround the pier bl, and the underwater work by the diver can be significantly reduced.

Next, a plurality of hollow segments 3 and 4 are stacked on the annular structure 1 floating on the water surface wl and connected in the horizontal direction hr to construct another annular structure 1. The operator brings the lower plate 36 of the stacked hollow segments 3 and the upper plate 34 of the hollow segment 3 of the lower h2 into contact with each other so that the through holes 36a and 34a are aligned with each other, and the through holes 36a, By inserting a bolt into 34a and fastening the nut to the bolt, the hollow segment 3 can be connected in the vertical direction v.
Further, the lower plate 47 of the stacked hollow segments 4 and the upper plate 45 of the hollow segment 4 of the lower h2 are brought into contact with each other so that the through holes 47a and 45a are aligned with each other, and the through holes 47a and 45a are brought into contact with each other. By inserting the bolt and fastening the nut to the bolt, the hollow segment 4 can be connected in the vertical direction v.
In a state where the plurality of hollow segments 3 and the hollow segments 4 are stacked, at least the annular structure 1 on the lower h2 is submerged due to the weight of the stacked hollow segments 3 and the hollow segments 4, but the stacked hollow segments 3 and The hollow segment 4 is designed to maintain a floating state without being submerged. Thus, a plurality of annular structures 1 can be constructed by stacking the hollow segment 3 and the hollow segment 4 on the annular structure 1 on the water surface wl.

The above operation is repeated until the lowermost annular structure 1 reaches the bottom of the water, and the annular structures 1 are stacked from the water surface wl to a predetermined height. Thus, the waterproof wall structure 100 is constructed.
After the construction of the water stop wall structure 100, the water in the inner space of the water stop wall structure 100 formed so as to surround the pier bl with a gap is drained by a pump or the like to surround the pier bl. A work space ws in a dry dry space is provided.
The outer plate 30, inner plate 32, upper plate 34, lower plate 36, and side plates 38 and 39 of the hollow segment 3 are welded to each other, and the outer plate 41 and inner plate 43 of the hollow segment 4 are welded to each other. The upper plate 45, the lower plate 47, and the side plates 48, 49 are welded to each other. Therefore, in the water blocking wall structure 100, water stopping is ensured at at least one of the outer wall and the inner wall thereof. Further, the buoyancy forming members 5 and 6 may be secured to stop water.

When constructing the water blocking wall structure 100, the opening / closing members 31, 33, 41v, 43v provided in the hollow segments 3 and the hollow segments 4 are opened from the openings in consideration of workability on the water surface wl. It is possible to control the infiltration of water into the internal spaces 3is and 4is, the exhaust of the air in the internal spaces 3is and 4is, and the submersion of the annular structure 1 in the water.

Further, the water blocking wall structure 100 is constructed by using a box-shaped hollow segment 3 having an outer plate 30 and an inner plate 32, and a box-shaped hollow segment 4 having an outer plate 41 and an inner plate 43. Therefore, for example, the strength against hydrostatic pressure, running water pressure, wave pressure, etc. is remarkably improved as compared with the conventional water blocking wall structure constituting the outer wall and the inner wall by one liner plate. Further, since the outer plates 30, 41 and the inner plates 32, 43 are provided with the corrugated plate portions 20a, 41a, 32a, 43a, respectively, the strength of the outer plates 30, 41 and the inner plates 32, 43 themselves is increased. There is.

For example, the cross-sectional coefficient of the liner plate having a height of 500 mm, a width of 55 mm, and a plate thickness of 2.7 mm was ^{22990 m 3.} The same liner plate is used for the outer plate and the inner plate, the distance between the outer plate and the inner plate is 250 mm, and the outer plate and the inner plate are connected by the upper plate and the lower plate having a plate thickness of 9.0 mm. The cross-sectional coefficient of the hollow segment was ^{460,300 mm 3.}
That is, assuming that the ratio of the cross-sectional coefficients of the single liner plate is 1, the cross-sectional coefficient of the hollow segment is about 20.0 times the cross-sectional coefficient of the single liner plate.
Since the strength of the water blocking wall structure 100 is remarkably high, the number of girders 9 installed between the inner wall (inner plate 32) and the pier bl is constructed by a single liner plate shown in FIG. This is reduced compared to the number of girders 9 installed in the conventional waterproof wall structure 200. Thus, the water blocking wall structure 100 can secure a large effective space of the working space ws as compared with the conventional water blocking wall structure 200, so that the working time can be shortened. Therefore, even if the repair / reinforcement work period is limited to the dry season, more pier bl can be repaired / reinforced within a limited period.

Further, since the opening / closing members 31, 33, 41v, 43v can adjust the injection of water into the hollow segments 3 and the internal spaces 3is, 4is of the hollow segments 4, the annular structure 1 can be easily submerged in water. It is possible to control the injection.
When disassembling the water blocking wall structure 100, air is forcibly sent into the internal spaces 3is and 4is from one of the opening and closing members 31; 33, 41v; 43v of the hollow segment 3 and the hollow segment 4, and the other is opened and closed. By draining the water in the internal spaces 3is and 4is from the members 31; 33, 41v; 43v, the annular structure 1 floats up again. Thus, since the connection between the hollow segment 3 and the hollow segment 4 can be released on the water surface wl, the water blocking wall structure 100 can be easily disassembled.

Further, since the water-stop wall structure 100 having a rectangular shape in a plan view does not affect the shape of the surrounding pier bl, it is not necessary to prepare a hollow segment according to the shape of the pier bl, and the hollow segment is not prepared according to the shape of the pier bl. The waterproof wall structure 100 can be constructed.

<Others>
The plan view shape of the water blocking wall structure 100 is not limited to a rectangular shape, and an annular structure having another shape such as a substantially elliptical cross-sectional view or a substantially oval shape by connecting the hollow segments 3 to each other. Body 1 may be formed. In this case, the plurality of hollow segments 3 may be directly connected to each other or indirectly connected via a predetermined intervening member.
Further, the hollow segment 3 and the hollow segment 4 used for the corner portion C of the annular structure 1 can also be formed by using the outer plate and the inner plate curved along the length direction l. In this case, the upper plate and the lower plate are formed so as to be curved along the outer plate and the inner plate.
Further, the opening / closing members 31, 33, 41v, 43v need not be provided on both the outer plates 30, 41 and the inner plates 32, 43, but may be provided on at least one of them.
Further, the buoyancy forming members 5 and 6 are not limited to the foam, and may be air trapped in the hollow segments 3 and the internal spaces 3is and 4is of the hollow segments 4.

1 Circular structure 3, 4 Hollow segment 3is Internal space 30 Outer plate 30a Corrugated plate 31 Opening and closing member 32 Inner plate 32a Corrugated plate 33 Opening and closing member 34 Upper plate (longitudinal wall plate)
34a Through hole 36 Lower plate (longitudinal wall plate)
36a Through holes 38, 39 Side plates (short wall plates)
38a, 39a Through hole 4is Internal space 41 Outer plate 41a Wavy plate part 41v Opening and closing member 43 Inner plate 43a Wavy plate part 43v Opening and closing member 45 Upper plate (longitudinal wall plate)
45a Through hole 47 Lower plate (longitudinal wall plate)
47a Through holes 48,49 Side plates (short wall plates)
48a, 49a Through holes 5, 6 Buoyancy forming member hr Horizontal direction v Vertical direction

Claims (7)

A structure that is at least partially submerged is floated on the surface of the water so as to surround it with an interval, and is connected to each other in the circumferential direction to form one annular structure, and another annular structure is formed on the one annular structure. A hollow segment used to form a structure of the above and submerge the one annular structure to construct a water blocking wall structure.
An outer plate forming the outer wall of the waterproof wall structure and
An inner plate forming the inner wall of the waterproof wall structure and
A wall portion that covers the space between the outer plate and the inner plate,
With
An internal space closed to the outside is defined by the outer plate, the inner plate, and the wall portion , and a buoyancy forming member is provided in the inner space.
An opening connecting the outside and the internal space is formed on at least one of the surface forming the outer wall of the outer plate and the surface forming the inner wall of the inner plate, and the opening can be opened and closed. It has closing member is provided, the hollow segments water residual internal space and said infiltration can der Rukoto through said opening in order to submerge the one annular structure. The hollow segment according to claim 1, wherein the outer plate and the inner plate have a wavy plate portion that repeats undulations. The outer plate and the inner plate have a rectangular shape in a plan view, and have a rectangular shape in a plan view.
The wall portion includes a longitudinal wall surface plate that forms a wall portion along the longitudinal direction of the outer plate and the inner plate, and a short wall surface that forms a wall portion along the lateral direction of the outer plate and the inner plate. Equipped with a plate,
The longitudinal wall plate has a plurality of holes formed along the longitudinal direction at both ends in the lateral direction.
The hollow segment according to claim 1 or 2 , wherein the short wall plate has a plurality of holes formed along the short direction at both ends in the short direction. An outer plate forming an outer wall of a water blocking wall structure formed by surrounding at least a partially submerged structure with an interval, an inner plate forming an inner wall of the water blocking wall structure, and the outer plate. 1 to 3 , wherein a wall portion covering the space between the inner plate and the inner plate is provided, and an internal space closed to the outside by the outer plate, the inner plate, and the wall portion is defined. Hollow segment according to any one of the above items An annular structure characterized by connecting a plurality of hollow segments in the horizontal direction. A water blocking wall structure formed by surrounding a structure that is at least partially submerged through a space, and is an outer plate that forms an outer wall, an inner plate that forms an inner wall, and the outer plate and the inner plate. Any one of claims 1 to 3 , further comprising a wall portion covering the space between the two, and the outer plate, the inner plate, and the inner space closed to the outside by the wall portion are defined. A water blocking wall structure, characterized in that a plurality of annular structures formed by connecting a plurality of hollow segments described in the section in the horizontal direction are stacked in the vertical direction. A method of constructing a water blocking wall structure by the hollow segment according to any one of claims 1 to 3.
A step of floating the hollow segment on the water surface so as to surround a structure that is at least partially submerged with a space, and connecting the hollow segments to each other in the circumferential direction to form one annular structure.
The step of forming another annular structure on the one annular structure and
Including
By forming the other annular structure on the one annular structure, the one annular structure is submerged.
A method of constructing a waterproof wall structure, which is characterized by the fact that. The stop according to claim 6, wherein the opening / closing member of the one annular structure submerged is opened, and water is allowed to enter the internal space through the opening to submerge the one annular structure. How to build a water wall structure.

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