JP2019210662A - Method for constructing water blocking wall structure, method for deconstructing water blocking wall structure, and water blocking wall structure - Google Patents

Abstract

To reduce work load for construction and deconstruction of a water blocking wall structure and to realize construction and deconstruction with less work equipment.SOLUTION: There is provided a method for constructing water blocking wall structure where hollow segments 2,4,6,8 in which internal spaces S1 to S4 are defined by walls are jointed in horizontal and vertical directions so as to ensure a water-trapped space from a structure whose at least one part has been submerged. The method includes: a step (A) where the hollow segments 2,4,6,8 are made to float on water surface wl and jointed each other in the lateral direction so as to form a joint structure, a step (B) where the hollow segments 2,4,6,8 are stacked and jointed on the joint structure formed in the step (A) so as to form another joint structure; and step (C) where liquid wa is injected into at least one of the internal spaces S1 to S4 of the hollow segments 2,4,6,8 which forms a joint structure submerged.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a construction method for a water blocking wall structure constructed by hollow segments, a method for dismantling the water blocking wall structure, and a water blocking wall structure.

  Conventionally, when reinforcing or repairing structures such as piers built in water such as rivers, rivers, harbors, and seawalls built along the coast, around the structure or near the point where the structure is reinforced or repaired In order to ensure a dry work space, it is necessary to construct a water blocking wall by a cutoff work (for example, refer to Patent Document 1).

JP 2011-58172 A

By the way, as shown in FIG. 14, in order to construct the water stop wall cw around the pier, a steel plate segment plate sp constituting the wall portion of the water stop wall cw is used. These segment plates sp are loaded on a trolley, and are lifted by a suspension machine cm installed on a pier portion on the water and suspended in water. The water blocking wall cw is assembled by the diving operator (hereinafter referred to as “diver”) connecting and fixing the segment plates sp lowered in the water to each other.
In order to construct such a water blocking wall cw, a large machine such as a suspension machine cm is required, and a diver must perform most of the construction work underwater. The underwater work by the diver had to be continued over the entire circumference of the pier bl and until the water blocking wall cw came out of the water surface in the height direction, and the work load on the diver performing the underwater work was large. .
In addition, after the reinforcement and repair of the pier bl, the water blocking wall cw must be dismantled. Even in the dismantling work, underwater work such as disconnecting the segment plates sp by a diver, There was a work of pulling up the segment plate sp, and the work load in the dismantling work was also large.
As described above, the construction and the dismantling work of the water blocking wall cw have a large burden, and the cost of reinforcing and repairing the water blocking wall cw has been increased.

  Therefore, the present invention has been made in view of the above problems, and it is possible to reduce the work load in the construction and dismantling work, and to construct and dismantle the water blocking wall structure that can be constructed and disassembled with a small number of work facilities. An object is to provide a water blocking wall structure.

  In order to solve the above-mentioned problems, the hollow segments defined by the inner wall of the wall according to the present invention are connected in the horizontal direction and the vertical direction, and at least part of the water is stopped between the submerged structures. According to the construction method of the water blocking wall structure for securing a space, the hollow segments are floated on the water surface and are connected to each other in the lateral direction (A), and formed in the step (A). A step (B) in which the hollow segments are stacked and connected to the connected body to form another connected body, and a liquid is formed in the internal space of the hollow segment that forms at least one of the connected bodies in water. A step (C) of injecting.

  In addition, after the steps (A) and (B) are repeated to stack the connecting body to a predetermined height, in the step (C), in the internal space of the hollow segment forming the lowest connecting body It is preferable to inject a liquid.

  Moreover, it is preferable to provide the process (D) of injecting a liquid into the internal space of all the stacked hollow segments.

  Furthermore, in order to solve the said subject, according to the dismantling method which concerns on this invention, the process (E) which supplies air in the said internal space of the said hollow segment filled with the said liquid, and the said which floated on water The connection body includes a step (F) of releasing the connection between the hollow segments and removing the hollow segments.

  Furthermore, in order to solve the above-described problem, according to the water blocking wall structure constructed according to the present invention so as to secure a space that is stopped at least partially between the submerged structure, the outer wall An outer plate that forms a wall, an inner plate that forms an inner wall, and a wall that covers a space between the outer plate and the inner plate, and is closed to the outside by the outer plate, the inner plate, and the wall. A plurality of hollow segments in which an internal space is defined, and a plurality of the hollow segments are connected in the lateral direction to form a connection body, and the connection bodies are stacked in a plurality, The interior space of the hollow segment forming at least a part of the coupling body below the water surface is filled with a liquid.

  Moreover, it is preferable that the internal space of the hollow segment is divided by at least one partition wall, and a hole that connects the divided internal spaces is formed in the partition wall.

  Further, at least one of the outer plate and the inner plate of at least one of the plurality of hollow segments is provided with a flow passage portion for allowing fluid to flow between the outside and the inner space. Preferably it is.

  Moreover, it is preferable to have a pipe member that is attached to the flow passage portion and allows the fluid to flow between the outside and the internal space.

  Moreover, it is preferable that the wall is formed with a hole that connects the internal spaces of the hollow segments adjacent in the horizontal direction and the vertical direction.

  Moreover, it is preferable that the structure is constructed so as to surround a rectangular shape in plan view.

  Moreover, it is preferable that the internal spaces of all the hollow segments are filled with water.

  According to the present invention, it is possible to reduce the work load in construction and dismantling work, and to construct and dismantle with a small number of work facilities.

It is the schematic of the water blocking wall structure which concerns on embodiment of this invention. It is a figure for demonstrating the structure of the hollow segment which constructs a water blocking wall structure. It is a figure for demonstrating the structure of the other hollow segment which constructs a water blocking wall structure. It is a figure which shows the state by which the pipe member was attached to the hollow segment of FIG. 2 and FIG. 3 of a water stop wall structure. It is a plane schematic diagram of a water blocking wall structure. It is a figure for demonstrating the construction / disassembly method of a water blocking wall structure. It is a figure for demonstrating the construction / disassembly method of a water blocking wall structure. It is a figure for demonstrating the construction / disassembly method of a water blocking wall structure. It is a figure for demonstrating the construction / disassembly method of a water blocking wall structure. It is a figure for demonstrating the construction / disassembly method of a water blocking wall structure. It is a figure which shows the structure of the hollow segment which concerns on a modification. It is a figure which shows the structure of the other hollow segment which concerns on a modification. It is a figure which shows the state by which the pipe member was attached to the hollow segment of FIG. 11 and FIG. 12 of a water stop wall structure. It is a figure for demonstrating the construction method of the conventional water stop wall.

  A preferred embodiment of the present invention will be described with reference to the drawings. The following embodiment is merely an example, and various embodiments can be employed within the scope of the present invention.

  FIG. 1 is a schematic view of a water blocking wall structure according to the present embodiment. FIG. 2 is a perspective view showing the hollow segment in a state where the inside can be seen, (a) is a perspective view of a rectangular segment of the hollow segment, and (b) is a perspective view of a connecting segment of the hollow segment. FIG. 3 is a perspective view showing another hollow segment with the inside visible, (a) is a perspective view of a rectangular segment of the other hollow segment, and (b) is a connecting segment of the other hollow segment. FIG. FIG. 4 is a perspective view showing the water blocking wall structure in a state in which a pipe member is attached to the hollow segment of FIGS. 2 and 3.

<Water blocking wall structure>
For example, as shown in FIG. 1, the water blocking wall structure 100 forms a work space ws around the pier bl when reinforcing and repairing the pier bl standing in water such as a river or the sea. Therefore, it is formed so as to surround the pier bl. The water blocking wall structure 100 is constructed by stacking a plurality of annular structures (connectors) 1 in the height direction h with respect to the water blocking wall structure 100 and connecting them to each other and assembling them into a cylindrical shape.

[Annular structure]
The annular structure 1 includes an annular structure 1A positioned at the lowest level of the water blocking wall structure 100 in the height direction h, and an annular structure 1B that is stacked and connected to the annular structure 1A in the height direction h. And have.
The annular structure 1A is configured to have a rectangular shape in plan view by connecting the hollow segments 10A in the lateral direction l. The annular structure 1B is configured to connect the hollow segments 10B in the lateral direction l so as to have a rectangular shape in plan view.
The hollow segment 10A includes a substantially rectangular parallelepiped rectangular segment 2 and a connecting segment 4 that connects the rectangular segments 2 at the corner portion C so as to form a right angle to each other. The hollow segment 10B includes a substantially rectangular parallelepiped rectangular segment 6 and a connecting segment 8 that couples the rectangular segments 6 at corner portions C so as to form a right angle to each other.
For convenience of explanation, the length direction (lateral direction) of the rectangular segments 2 and 6 and the connecting segments 4 and 8 is “l”, the height direction (vertical direction) is “h”, and the width direction (thickness direction) is Let it be “w”.

As shown in FIG. 2A, in the rectangular segment 2 of the hollow segment 10A, an inner space S1 is defined by a wall surface. The rectangular segment 2 includes three outer plates 21 forming the outer wall of the water blocking wall structure 100, three inner plates 22 forming the inner wall of the water blocking wall structure 100, the outer plate 21 and the inner wall. And a wall portion covering the space between the plates 22.
The wall portion includes an upper plate 23 that covers the rectangular segment 2 from the upper side in the height direction h, a lower plate 24 that covers the rectangular segment 2 from the lower side, and two lateral sides that cover the rectangular segment 2 from the lateral side in the length direction l. Plate 25.
The rectangular segment 2 is formed in a box shape with a hollow internal space S1 defined by an outer plate 21, an inner plate 22, an upper plate 23, a lower plate 24, and a side plate 25. The rectangular segment 2 further includes two partition plates (partition walls) 26 that partition the internal space S1 perpendicular to the height direction h. The rectangular segment 2 is equally divided into three internal spaces S1, but the internal spaces S1 are connected to each other.

The outer plate 21 is configured in a rectangular shape in plan view, and is a so-called liner plate formed of, for example, a linear steel sheet pile having a corrugated portion formed by curving a steel plate into a corrugated shape. The wavy portion is formed to undulate in the thickness direction w along the height direction h.
The outer plates 21 are arranged along the height direction h.

Each inner plate 22 is disposed to face each other in parallel with each outer plate 21. The inner plate 22 is configured in a rectangular shape in plan view, and is, for example, a so-called liner plate formed of a linear steel sheet pile having a corrugated portion formed by curving a steel plate into a corrugated shape. The wavy portion is formed to undulate in the thickness direction w along the height direction h.
The inner plate 22 arranged at the top in the height direction h is formed with a flow passage portion through which a fluid such as air flows between the outside of the rectangular segment 2 and the inner space S1 of the rectangular segment 2. . The flow part is a flow hole (not shown) formed in the inner plate 22 and, for example, a hose or the like for supplying air from the outside to the internal space S1 attached to the flow hole. And a connecting member V1 to which a tube member T1 (see FIG. 4) is connected. As the connection member V1, a known valve member having an air supply / exhaust valve function is used.
When the connection member V1 is opened, the outside and the internal space S1 communicate with each other, air can be supplied from the outside to the internal space S1, and air can be discharged (exhaust) from the internal space S1 to the outside. . When the connection member V1 is closed, the communication between the outside and the internal space S1 is blocked, and the supply of air from the outside to the internal space S1 is prevented.
The inner plate 22 disposed at the lowest position in the height direction h is formed with a flow passage portion through which a fluid such as water (liquid) flows between the outside of the rectangular segment 2 and the internal space S1 of the rectangular segment 2. Has been. The flow passage portion is a flow passage (not shown) formed in the inner plate 22 and, for example, a hose or the like for supplying water from the outside to the internal space S1 attached to the flow passage. And a connecting member V2 to which a tube member T2 (see FIG. 4) is connected. As the connection member V2, a known valve member having a water supply / drainage valve function is used.
When the connection member V2 is opened, the outside and the internal space S1 are communicated, so that water can be injected from the outside into the internal space S1, and water can be discharged (drained) from the internal space S1 to the outside. If the connection member V2 is closed, the communication between the outside and the internal space S1 is blocked, and the inflow and outflow of water from the outside to the internal space S1 is prevented.

The upper plate 23 is made of a steel plate having a rectangular shape in plan view, and covers the space between the outer plate 21 and the inner plate 22 from the upper side in the height direction h. The upper plate 23 extends along the outer plate 21 and the inner plate 22 in the length direction l, and protrudes from the outer plate 21 and the inner plate 22 by a predetermined length in the width direction w. The upper plate 23 is welded to the outer plate 21 and the inner plate 22 along the length direction l.
A plurality of through holes 23a are formed at equal intervals along the length direction 1 in the protruding portion of the upper plate 23 protruding by a predetermined length from the outer plate 21 and the inner plate 22 in the width direction w. The through hole 23 a is inserted with a bolt (not shown) for connecting the rectangular segment 2 and a rectangular segment 6 or a connecting segment 8, which will be described later, stacked on the rectangular segment 2.
An attachment hole (not shown) may be formed in order to attach the scaffold 27 between portions of the protruding portion where the through hole 23a is not formed, for example, between adjacent through holes 23a.

The lower plate 24 is formed of a steel plate having a rectangular shape in plan view, and covers the space between the outer plate 21 and the inner plate 22 from below in the height direction h. The lower plate 24 extends along the outer plate 21 and the inner plate 22 in the length direction l, and protrudes by a predetermined length from the outer plate 21 and the inner plate 22 in the width direction w. The lower plate 24 is welded to the outer plate 21 and the inner plate 22 along the length direction l.
A plurality of through holes 24 a are formed at equal intervals along the length direction 1 in the protruding portion of the lower plate 24 that protrudes from the outer plate 21 and the inner plate 22 by a predetermined length in the width direction w. The through hole 24a is inserted with a bolt (not shown) for connecting a water stop plate (not shown) to the rectangular segment 2.
An attachment hole (not shown) for attaching the scaffold 27 may be formed between portions of the protruding portion where the through hole 24a is not formed, for example, between the adjacent through holes 24a.

The side plate 25 is formed of a steel plate having a rectangular shape in plan view, and covers the space between the outer plate 21 and the inner plate 22 from the side (lateral l side). The side plate 25 extends along the outer plate 21 and the inner plate 22 in the height direction h, and protrudes from the outer plate 21 and the inner plate 22 by a predetermined length in the width direction w. The side plate 25 is welded to the outer plate 21 and the inner plate 22 along the height direction h.
A plurality of through holes 25a are formed at equal intervals along the height direction h in a portion of the side plate 25 that protrudes from the outer plate 21 and the inner plate 22 by a predetermined length in the width direction w. The through-hole 25a is inserted with a bolt (not shown) for connecting the rectangular segment 2 and the rectangular segment 2 and the connecting segment 4 adjacent to the rectangular segment 2 in the lateral direction l.

The partition plate 26 is formed of a steel plate having a rectangular shape in plan view. The partition plate 26 is provided between a pair of the outer plate 21 and the inner plate 22 that are adjacent to each other in the height direction h and face each other. In the rectangular segment 2, the internal space S1 is divided into three equal parts by two partition plates 26.
The partition plate 26 extends along the outer plate 21 and the inner plate 22 in the length direction l, and has a protruding portion that protrudes from the outer plate 21 and the inner plate 22 by a predetermined length in the width direction w. The partition plate 26 is welded to the outer plate 21 and the inner plate 22 along the length direction l, and is welded to the side plate 25 along the width direction w.
The partition plate 26 is formed with a through hole 26a for connecting (communicating) the divided internal spaces S1. In addition, the position and number in which the through-hole 26a is formed are not specifically limited.
Two attachment holes (not shown) may be formed in the protruding portion of the partition plate 26 in order to attach the scaffold 27.

As shown in FIG. 2B, the connecting segment 4 is L-shaped in a plan view that connects the rectangular segments 2 that are in a mutually orthogonal positional relationship. The connecting segment 4 has an inner space S2 defined by the wall surface. The connecting segment 4 includes six outer plates 41 that form the outer wall of the water blocking wall structure 100, six inner plates 42 that form the inner wall of the water blocking wall structure 100, the outer plate 41, and the inner wall. And a wall portion covering the space between the plates 42.
The wall portion includes an L-shaped upper plate 43 that covers the connecting segment 4 from the upper side in the height direction h, an L-shaped lower plate 44 that covers the connecting segment 4 from the lower side, and the connecting segment 4 laterally. And two side plates 45 covering from the above.
The connecting segment 4 is formed in an L-shaped box shape in plan view, with a hollow internal space S2 defined by an outer plate 41, an inner plate 42, an upper plate 43, a lower plate 44, and a side plate 45. The connecting segment 4 further includes two partition plates (partition walls) 46 that partition the internal space S2 perpendicularly to the height direction h. The connection segment 4 is equally divided into three internal spaces S2, but the internal spaces S2 are connected to each other.

The outer plate 41 has three first plates 47 and three second plates 48. The first plate 47 and the second plate 48 are connected to each other through a connecting member so as to form a right angle. Yes. The first plate 47 is configured to be long with respect to the second plate 48.
Each first plate 47 is configured in a rectangular shape in plan view, and is, for example, a so-called liner plate formed of a linear steel sheet pile having a corrugated portion formed by curving a steel plate into a corrugated shape. The wavy portion is formed to undulate in the width direction w along the height direction h.
Each first plate 47 is arranged along the height direction h.

Each second plate 48 has a rectangular shape in plan view, and is, for example, a so-called liner plate formed of a linear steel sheet pile having a corrugated portion formed by curving a steel plate into a corrugated shape. The wavy portion is formed to undulate in the width direction w along the height direction h.
Each second plate 48 is arranged along the height direction h.

  Each inner plate 42 is disposed to face each outer plate 41 in parallel. The inner plate 42 includes three first plates 49 and three second plates 50. The first plate 49 and the second plate 50 are connected to each other at right angles via a connecting member. Yes. The first plate 49 is configured to be long with respect to the second plate 50.

Each first plate 49 is configured in a rectangular shape in plan view, and is, for example, a so-called liner plate formed of a linear steel sheet pile having a corrugated portion formed by curving a steel plate into a corrugated shape. The wavy portion is formed to undulate in the width direction w along the height direction h.
Each first plate 49 is arranged along the height direction h.
Each second plate 50 is configured in a rectangular shape in plan view, and is, for example, a so-called liner plate formed of a linear steel sheet pile having a corrugated portion formed by curving a steel plate into a corrugated shape. The wavy portion is formed to undulate in the width direction w along the height direction h.
Each second plate 50 is arranged along the height direction h.
The first plate 49 arranged at the top in the height direction h is formed with a flow passage portion through which a fluid such as air flows between the outside of the connection segment 4 and the internal space S2 of the connection segment 4. Yes. The flow part is a flow hole (not shown) formed in the first plate 49 and, for example, a hose attached to the flow hole for supplying air from the outside to the internal space S2. Connecting member V1 to which the tube member T1 is connected. As the connection member V1, a known valve member having an air supply / exhaust valve function is used.
When the connection member V1 is opened, the outside and the internal space S2 communicate with each other, so that air can be supplied from the outside to the internal space S2, and air can be discharged (exhaust) from the internal space S2 to the outside. . When the connection member V1 is closed, the communication between the outside and the internal space S2 is blocked, and the supply of air from the outside to the internal space S2 is prevented.
The connecting member V1 may be provided on the second plate 50 instead of the first plate 49.

The first plate 49 arranged at the lowest position in the height direction h has a flow passage portion through which a fluid such as water (liquid) flows between the outside of the connection segment 4 and the internal space S2 of the connection segment 4. Is formed. The flow part is a flow hole (not shown) formed in the first plate 49 and a water hose or the like for supplying water from the outside to the internal space S2 attached to the flow hole. And a connecting member V2 to which the tube member T2 is connected. As the connection member V2, a known valve member having a water supply / drainage valve function is used.
When the connection member V2 is opened, the outside and the internal space S2 are communicated, so that water can be injected from the outside into the internal space S2, and water can be discharged (drained) from the internal space S2 to the outside. . When the connection member V2 is closed, the communication between the outside and the internal space S2 is blocked, and the inflow and outflow of water from the outside to the internal space S2 is prevented.
The connecting member V2 may be provided on the second plate 50 instead of the first plate 49.

The upper plate 43 is formed of a steel plate having an L shape in plan view, and covers the space between the outer plate 41 and the inner plate 42 from the upper side in the height direction h. The upper plate 43 extends along the first plate 47 and the second plate 48 of the outer plate 41 and the first plate 49 and the second plate 50 of the inner plate 42, and the outer plate 41 and the inner plate 42. Projecting by a predetermined length in the width direction w. The upper plate 43 is welded to the outer plate 41 and the inner plate 42 provided at the uppermost position.
A plurality of through-holes 43a are formed at equal intervals along the length direction 1 in the protruding portion of the upper plate 43 that protrudes from the outer plate 41 and the inner plate 42 by a predetermined length in the width direction w. The through-hole 43a is inserted with a bolt (not shown) for connecting the connecting segment 4 and a rectangular segment 6 and a connecting segment 8, which will be described later, which are overlapped with the connecting segment 4.
An attachment hole (not shown) for attaching the scaffold 27 may be formed in a portion where the through hole 43a of the protruding portion is not formed, for example, between the adjacent through holes 43a.

The lower plate 44 is formed of an L-shaped steel plate in plan view, and covers the space between the outer plate 41 and the inner plate 42 from below in the height direction h. The lower plate 24 extends along the first plate 47 and the second plate 48 of the outer plate 41, the first plate 49 and the second plate 50 of the inner plate 42, and extends from the outer plate 41 and the inner plate 42. It protrudes by a predetermined length in the width direction w. The lower plate 44 is welded to the outer plate 41 and the inner plate 42 provided at the lowest position.
A plurality of through holes 44a are formed at equal intervals along the length direction l in the protruding portion of the lower plate 44 that protrudes from the outer plate 41 and the inner plate 42 by a predetermined length in the width direction w. A bolt (not shown) for connecting a water stop plate (not shown) to the connecting segment 4 is inserted into the through hole 44a.
An attachment hole (not shown) for attaching the scaffold 27 may be formed between portions where the through hole 44a of the protruding portion is not formed, for example, between the adjacent through holes 44a.

  The side plate 45 is formed of a steel plate having a rectangular shape in plan view, and covers the space between the outer plate 41 and the inner plate 42 from the side. The side plate 45 extends along the outer plate 41 and the inner plate 42 in the height direction h, and protrudes from the outer plate 41 and the inner plate 42 by a predetermined length in the width direction w. The side plate 45 is welded to the outer plate 41 and the inner plate 42 along the height direction h.

  A plurality of through holes 45a are formed at equal intervals along the height direction h in the protruding portion of the side plate 45 that protrudes from the outer plate 41 and the inner plate 42 by a predetermined length in the width direction w. The through hole 45a is inserted with a bolt (not shown) for connecting the rectangular segments 2 connected adjacent to each other in the length direction l.

The partition plate 46 is formed of a steel plate having an L shape in plan view. The partition plate 46 is provided between a pair of the outer plate 41 and the inner plate 42 that are adjacent to each other in the height direction h and face each other. In the connecting segment 4, the internal space S <b> 2 is divided into three equal parts by two partition plates 46.
The partition plate 46 extends along the first plate 47 and the second plate 48 of the outer plate 41 and the first plate 49 and the second plate 50 of the inner plate 42 along the length direction l. The plate 41 and the inner plate 42 have projecting portions that project by a predetermined length in the width direction w. The partition plate 46 is welded to the outer plate 41 and the inner plate 42 along the length direction l, and is welded to the side plate 45 along the width direction w.
The partition plate 46 is formed with a through hole 46a for connecting (communicating) the divided internal spaces S2. The position and number of the through holes 46a are not particularly limited.
An attachment hole (not shown) may be formed in the protruding portion of the partition plate 46 in order to attach the scaffold 27.

As shown in FIG. 3A, the rectangular segment 6 of the hollow segment 10B has an inner space S3 defined by a wall surface. The rectangular segment 6 includes two outer plates 61 that form the outer wall of the water blocking wall structure 100, two inner plates 62 that form the inner wall of the water blocking wall structure 100, the outer plate 61, and the inner wall. And a wall portion covering the space between the plates 62.
The wall includes an upper plate 63 that covers the rectangular segment 6 from the upper side in the height direction h, a lower plate 64 that covers the rectangular segment 6 from the lower side, and two lateral sides that cover the rectangular segment 6 from the lateral side in the length direction l. Plate 65.
The rectangular segment 6 is formed in a box shape with a hollow inner space S3 defined by an outer plate 61, an inner plate 62, an upper plate 63, a lower plate 64, and a side plate 65. The rectangular segment 6 further includes one partition plate (partition wall) 66 that partitions the internal space S3 perpendicularly to the height direction h. The rectangular segment 6 is equally divided into two internal spaces S3, but the internal spaces S3 are connected to each other.

The outer plate 61 is configured in a rectangular shape in plan view, and is, for example, a so-called liner plate formed by a linear steel sheet pile having a corrugated portion formed by curving a steel plate into a corrugated shape. The wavy portion is formed to undulate in the thickness direction w along the height direction h.
The outer plates 61 are respectively arranged along the height direction h.

Each inner plate 62 is arranged in parallel and opposite to each outer plate 61. The inner plate 62 is configured in a rectangular shape in plan view, and is, for example, a so-called liner plate formed of a linear steel sheet pile having a corrugated portion formed by curving a steel plate into a corrugated shape. The wavy portion is formed to undulate in the thickness direction w along the height direction h.
The inner plates 62 are arranged along the height direction h.
The inner plate 62 disposed at the uppermost position in the height direction h has a connection member V1, and the inner plate 62 disposed at the lowermost position in the height direction h has a connection member V2. Each connection member V1, V2 has the same function as the connection members V1, V2 in the rectangular segment 2. The inner plate 62 has the same configuration as the inner plate 22 of the rectangular segment 2.

The upper plate 63 is formed of a steel plate having a rectangular shape in plan view, and covers the space between the outer plate 61 and the inner plate 62 from the upper side in the height direction h.
In the through-hole 63a formed in the protruding portion of the upper plate 63 protruding by a predetermined length in the width direction w from the outer plate 61 and the inner plate 62, there are a rectangular segment 6 and a rectangular segment 6 overlapped with the rectangular segment 6. Alternatively, a bolt (not shown) for connecting the connecting segment 8 is inserted.
An attachment hole (not shown) may be formed between the adjacent through holes 63a in order to attach the scaffold 27. The upper plate 63 has the same configuration as the upper plate 23 of the rectangular segment 2.

The lower plate 64 is formed of a steel plate having a rectangular shape in plan view, and covers the space between the outer plate 61 and the inner plate 62 from below in the height direction h.
A through-hole 64a formed in a protruding portion of the lower plate 64 protruding by a predetermined length in the width direction w from the outer plate 61 and the inner plate 62 has a rectangular segment 6 and a rectangular parallelepiped below the rectangular segment 6. Bolts (not shown) for connecting the segments 2 and 6 or the connecting segments 4 and 8 are inserted.
An attachment hole (not shown) may be formed between the adjacent through holes 64a in order to attach the scaffold 27. The lower plate 64 has the same configuration as the lower plate 24 of the rectangular segment 2.

The side plate 65 is formed of a rectangular steel plate in plan view, and covers the space between the outer plate 61 and the inner plate 62 from the side (lateral l side).
The through-hole 65a formed in the protruding portion of the side plate 65 that protrudes from the outer plate 61 and the inner plate 62 by a predetermined length in the width direction w has a rectangular segment 6 and the rectangular segment 6 in the lateral direction l. A bolt (not shown) for connecting the adjacent rectangular segment 6 and connecting segment 8 is inserted. The side plate 65 has the same configuration as the side plate 25 of the rectangular segment 2.

The partition plate 66 is formed of a steel plate having a rectangular shape in plan view. The partition plate 66 is provided between a pair of the outer plate 61 and the inner plate 62 that are adjacent to each other in the height direction h and face each other. In the rectangular segment 6, the internal space S3 is divided into two equal parts by one partition plate 66. The partition plate 66 is formed with a through hole 66a for connecting (communicating) the divided internal spaces S3. Note that the position and number of the through holes 66a are not particularly limited.
An attachment hole (not shown) may be formed in the protruding portion of the partition plate 66 that protrudes from the outer plate 21 and the inner plate 22 by a predetermined length in the width direction w in order to attach the scaffold 27. The partition plate 66 has the same configuration as the partition plate 26 of the rectangular segment 2.

As shown in FIG. 3B, the connecting segment 8 is L-shaped in a plan view that connects the rectangular segments 6 that are in a mutually orthogonal positional relationship. The connecting segment 8 has an inner space S4 defined by the wall surface. The connection segment 8 includes four outer plates 81 that form the outer wall of the water blocking wall structure 100, four inner plates 82 that form the inner wall of the water blocking wall structure 100, the outer plate 81, and the inner wall. And a wall portion covering the space between the plates 82.
The wall portion includes an L-shaped upper plate 83 that covers the connecting segment 8 from above in the height direction h, an L-shaped lower plate 84 that covers the connecting segment 8 from below, and the connecting segment 8 laterally. And two side plates 85 covering from the above.
The connecting segment 8 is formed in a box shape with a hollow internal space S4 defined by an outer plate 81, an inner plate 82, an upper plate 83, a lower plate 84, and a side plate 85. The connecting segment 8 further includes a single partition plate (partition wall) 86 that partitions the internal space S4 perpendicular to the height direction h. In the connection segment 8, the two internal spaces S4 are equally divided, but the internal spaces S4 are connected to each other.

The outer plate 81 includes two first plates 87 and two second plates 88. The first plate 87 and the second plate 88 are connected to each other through a connecting member so as to form a right angle. Yes. The first plate 87 is configured to be long with respect to the second plate 88.
Each of the first plate 87 and the second plate 88 has a rectangular shape in plan view. For example, the first plate 87 and the second plate 88 are so-called liners formed by linear steel sheet piles having a corrugated portion formed by curving a steel plate into a corrugated shape. It is a plate. The wavy portion is formed to undulate in the width direction w along the height direction h. The outer plate 81 has the same configuration as the outer plate 41 of the connecting segment 4. The outer plate 81 has the same configuration as the outer plate 41 of the connecting segment 4.

The inner plate 82 includes two first plates 89 and two second plates 90, and the first plate 89 and the second plate 90 are connected to each other at right angles via a connecting member. . The first plate 89 is configured to be long with respect to the second plate 90.
Each of the first plate 89 and the second plate 90 is configured to have a rectangular shape in plan view, for example, a so-called liner formed by a linear steel sheet pile having a corrugated portion formed by curving a steel plate into a corrugated shape. It is a plate. The wavy portion is formed to undulate in the width direction w along the height direction h.

Each inner plate 82 is disposed in parallel with each outer plate 81 so as to face each other. The inner plate 82 has a connection member V1 on a first plate 89 disposed on the upper side in the height direction h, and the first plate 89 disposed on the lower side in the height direction h has a connection member V2. Each connection member V1, V2 has the same function as the connection member V1, V2 in the connection segment 4. The inner plate 82 has the same configuration as the inner plate 42 of the connecting segment 4.
The connecting member V1 and the connecting member V2 may be provided on the second plate 90 instead of the first plate 89.

The upper plate 83 is formed of an L-shaped steel plate in plan view, and covers the space between the outer plate 81 and the inner plate 82 from above in the height direction h.
A through-hole 83a formed in a protruding portion of the upper plate 83 protruding by a predetermined length in the width direction w from the outer plate 81 and the inner plate 82 has a connecting segment 8 and a rectangular segment 6 overlapped with the connecting segment 8. Alternatively, a bolt (not shown) for connecting the connecting segment 8 is inserted.
An attachment hole (not shown) for attaching the scaffold 27 may be formed in a portion where the through hole 83a of the protruding portion is not formed, for example, between the adjacent through holes 83a. The upper plate 83 has the same configuration as the upper plate 43 of the connecting segment 4.

The lower plate 84 is formed of a steel plate having an L shape in plan view, and covers the space between the outer plate 81 and the inner plate 82 from below in the height direction h.
The through-hole 84a formed in the protruding portion of the lower plate 84 that protrudes from the outer plate 81 and the inner plate 82 by a predetermined length in the width direction w has a connecting segment 8 and a lower side of the connecting segment 8 below. Bolts (not shown) for connecting the segments 2 and 6 or the connecting segments 4 and 8 are inserted.
An attachment hole (not shown) may be formed in order to attach the scaffold 27 between portions of the protruding portion where the through hole 84a is not formed, for example, between the adjacent through holes 84a. The lower plate 84 has the same configuration as the lower plate 44 of the connecting segment 4.

The side plate 85 is formed of a rectangular steel plate in plan view, and covers the space between the outer plate 81 and the inner plate 82 from the side (lateral l side).
A through-hole 85a formed in the protruding portion of the side plate 85 protruding by a predetermined length in the width direction w from the outer plate 81 and the inner plate 82 has a connecting segment 8 and a lateral direction l in the connecting segment 8. A bolt (not shown) for connecting the adjacent rectangular segments 6 is inserted. The side plate 85 has the same configuration as the side plate 45 of the connecting segment 4.

The partition plate 86 is formed of a steel plate having an L shape in plan view. The partition plate 86 is provided between a pair of an outer plate 81 and an inner plate 82 that are adjacent to each other in the height direction h and face each other. The connecting segment 8 has an internal space S4 divided into two equal parts by a single partition plate 86. The partition plate 86 is formed with a through hole 86a for connecting (communicating) the divided internal spaces S4. In addition, the position and number in which the through-hole 86a is formed are not specifically limited.
An attachment hole (not shown) for attaching the scaffold 27 may be formed in the protruding portion of the partition plate 86 that protrudes from the outer plate 81 and the inner plate 82 by a predetermined length in the width direction w. The partition plate 86 has the same configuration as the partition plate 46 of the connection segment 4.

As shown in FIG. 4, in the state where the rectangular structures 1A and 1B are formed by connecting the rectangular segments 2 and 6 and the connecting segments 4 and 8 in the longitudinal direction l, the circumferential direction of the annular structures 1A and 1B is formed. Two pipe members T1 and T2 are provided along.
The pipe member T1 includes a plurality of connecting portions T1a that are detachably connected to connecting members V1 attached to the flow-through portions, and at least one supply / discharge portion T1b that communicates with the outside and enables intake and exhaust. Have.
The tube member T2 has a plurality of connecting portions T2a that are detachably connected to connecting members V2 attached to the flow-through portions, and at least one supply / discharge portion T2b that communicates with the outside and enables water supply / drainage. doing.

  The side plates 25 and 65 of the rectangular segments 2 and 6 and the side plates 45 and 85 of the connecting segments 4 and 8 that are stacked vertically adjacent to each other in the height direction h are displaced in the circumferential direction of the annular structures 1A and 1B. In the position. That is, the rectangular segments 2 and 6 and the connecting segments 4 and 8 adjacent in the vertical direction are arranged in a staggered manner.

<Construction and dismantling method of water barrier structure>
Next, the construction / disassembly method of the water blocking wall structure 100 according to the embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a schematic plan view of the water blocking wall structure according to the embodiment of the present invention. FIGS. 6 to 10 are diagrams for explaining a construction / disassembly method of a water blocking wall structure according to an embodiment of the present invention.
For example, 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. The temporary construction method for securing the work 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.
In general, the water blocking wall structure 100 formed by the deadline method differs depending on the equipment environment such as a river or the sea, but is sufficient for hydrostatic pressure due to surrounding water, flowing water pressure due to water flow, wave pressure due to waves, and the like. Strength and water stop performance are required.
As shown in FIG. 5, before the construction of the water blocking wall structure 100, a steel vertical frame 9 is driven into the water bottom around the pier bl at a predetermined interval with respect to the pier bl. Next, a cut beam 91 is installed between the vertical frame 9 and the pier bl.

Next, the rectangular segment 2 and the connecting segment 4 are first lowered onto the water surface wl from the trolley loaded with the hollow segments 10A and 10B. Each internal space S1, S2 of the rectangular segment 2 and the connecting segment 4 is densely configured with respect to the outside. That is, even when the rectangular segment 2 and the connecting segment 4 are lowered onto the water surface wl, the rectangular segment 2 and the connecting segment 4 are maintained in a floating state without being completely submerged as shown in FIG.
In addition, since the rectangular segment 2 and the connection segment 4 which are first lowered on the water surface wl maintain a state of partially rising from the water surface wl by their own buoyancy, the scaffold 27 may not be attached. The scaffold 27 is detachable with respect to the rectangular segment 2 and the connecting segment 4.

The rectangular structure 1A is constructed by connecting the rectangular segment 2 and the connecting segment 4 lowered on the water surface wl to each other in the lateral direction 1 so as to surround the pier bl (steps (A) and (B)). Specifically, the side plates 25 and 45 of the plurality of rectangular segments 2 and the connecting segments 4 floating on the water surface wl are brought into contact with each other so that the through holes 25a and 45a are aligned with each other. By inserting bolts into the holes 25a and 45a and fastening the nuts to the bolts, the rectangular segments 2 and the connecting segments 4 adjacent to each other in the lateral direction l are connected.
Here, the pipe member T1 is connected to the connection member V1 of each flow passage provided on the inner plate 22, 42 of the rectangular segment 2 of the annular structure 1A and the connection segment 4, and the connection member V2 of each flow passage is connected to the connection member V2. The tube member T2 is connected. The illustration of the tube members T1 and T2 is omitted in FIGS. 6 to 10 in order to make the drawings easy to see.

Next, as shown in FIG. 6 (b), the rectangular segments 6 and the connecting segments 8 are stacked on the annular structure 1A in a floating state on the water surface wl and connected to the annular structure 1A in the lateral direction. 1 to construct the annular structure 1B (steps (A) and (B)).
The rectangular segment 6 and the connecting segment 8 are connected to the annular structure 1A through the through holes 23a, 43a in the upper plates 23, 43 of the rectangular segment 2 and the connecting segment 4, and the lower plates 64 of the rectangular segment 6 and the connecting segment 8, This is done by aligning the through holes 64a and 84a in 84, inserting bolts and attaching nuts.
Here, the rectangular segment 6 and the connecting segment 8 on the annular structure 1A are installed at positions facing each other on the annular structure 1A so that the annular structure 1A is not inclined due to the weight of the rectangular segment 6 and the connecting segment 8. It is preferable to continue.

In the rectangular segments 6 and the connecting segments 8 connected to the annular structure 1A, the adjacent rectangular segments 6 and the connecting segments 8 are aligned with the through holes 65a and 85a of the side plates 65 and 85, respectively. By inserting bolts into the through holes 65a and 85a aligned with each other and fastening the nuts to the bolts, the rectangular segments 6 and the connecting segments 8 adjacent to each other in the lateral direction 1 are connected to each other to construct the annular structure 1B. Thereby, the annular structure 1B is connected to the annular structure 1A.
Here, the pipe member T1 is also connected to each connecting member V1 provided on the inner plates 62 and 82 of the rectangular segment 6 and the connecting segment 8, and the pipe member T2 is also connected to each connecting member V2.

  Next, as shown in FIG. 7A, another annular structure 1B is constructed on the constructed annular structure 1B. When the annular structure 1B is stacked over a plurality of stages, the annular structure 1A and the annular structure 1B are floated by the air present in the internal spaces S1 to S4. In this state, some of the annular structures 1B reach a predetermined height from above the water surface wl. The “predetermined height” is, for example, a height at which a work space (a space for stacking the annular structures 1) cannot be secured on the water surface wl by the stacked annular structures 1B, or a height at which the construction work is a high place work. That's it.

  In order to secure a working space, as shown in FIG. 7B, the rectangular segment 2 is passed through the rectangular segment 2 in the annular structure 1A and the supply / discharge portion T2b of the tube member T2 connected to the connecting member V2 of the connecting segment 4. And water wa is inject | poured in the connection segment 4 from the outside (process (C)).

The internal spaces S1 divided by the partition plate 26 of the rectangular segment 2 are connected to each other by a through hole 26a, and the internal spaces S2 divided by the partition plate 46 of the connecting segment 4 are connected to each other by a through hole 46a. Therefore, the internal spaces S1 and S2 of each rectangular segment 2 and the connecting segment 4 are filled with water wa. The air in the internal spaces S1, S2 is discharged to the outside through the supply / discharge portion T1b of the tube member T1.
The annular structure 1A sinks in water due to the weight of the rectangular segment 2 and the connecting segment 4 and the weight of the water wa. As the annular structure 1A settles, the annular structures 1B that are connected to each other also settle, and the annular structure 1B on the water surface wl sinks in water. Thus, a new work space on the water surface wl is formed.

When the annular structure 1B is stacked again to a height at which the work space cannot be secured, as shown in FIG. 8 (a), water is poured in order from the annular structure 1B arranged on the lower side, Form again. This operation is repeated until the water stop plates attached to the lower plates 24 and 44 of the annular structure 1A reach the bottom of the water or the footing of the pier bl.
Finally, as shown in FIG. 8B, water is poured into all the rectangular segments 6 and the connecting segments 8 in which the internal spaces S3 and S4 are not filled with the water wa (step (D)). Thereby, the inside of the water blocking wall structure 100 is filled with the water wa as a whole.

After construction of the water blocking wall structure 100, the water wa in the inner space of the water blocking wall structure 100 formed so as to surround the pier bl with a gap is drained by a pump or the like, so that the periphery of the pier bl A dry work space ws is provided. Thus, the water blocking wall structure 100 is constructed.
After the work space ws is secured, the stairway 27l is installed at a predetermined position in the circumferential direction of the water blocking wall structure 100 between the scaffolds 27 adjacent in the height direction h. Thereby, the movement to the scaffold 27 installed in a different height position is attained.
When the work space ws of the dry space is secured, the pipe members T1 and T2 may remain attached to the water blocking wall structure 100, and the water wa is pumped to secure the work space ws. In the process of draining, etc., the connecting members V1 and V2 may be appropriately removed.

  Since the scaffold 27 attached at the time of construction remains attached to the inner wall side in the water blocking wall structure 100, the worker can use the scaffold 27 to secure the work space ws secured as a dry space, Repair the bridge pier bl while moving freely up and down and left and right.

After the reinforcement / repair work of the pier bl is completed using the work space ws, the water blocking wall structure 100 is dismantled. After putting water wa into the working space ws, the water is removed to the annular structure 1B in order from the top of the water blocking wall structure 100. When the pipe members T1 and T2 are removed, the pipe members T1 and T2 are attached to the connection members V1 and V2.
First, as shown in FIG. 9 (a), air is sent from the outside into the internal spaces S3 and S4 of the rectangular segment 6 and the connecting segment 8 of the annular structure 1B via the supply / discharge portion T1b of the tube member T1. Then, the water wa in the internal spaces S3 and S4 is drained to the outside through the pipe member T2 (or the flow passage) (step (E)). In addition, if each internal space S3, S4 is connected with the exterior via the supply / discharge part T1b of the pipe member T1, the water wa in the internal spaces S3, S4 will be supplied via the pipe member T2 (or the flow part). You may make it aspirate and drain outside.
By repeating this step (E) a predetermined number of times, the annular structure 1A and the annular structure 1B connected to each other start to float.

  Next, as shown in FIG. 9B, the connected state of the rectangular segments 6 and the connecting segments 8 in the annular structure 1B floating on the water surface wl is released, and the rectangular segments 6 and the connecting segments 8 are respectively removed. (Step (F)). By removing the rectangular segment 6 and the connecting segment 8, another annular structure 1 </ b> B rises from the water on the water surface wl. When the step (F) is repeated and the annular structure 1B no longer floats, air is again injected into the annular structure 1B to drain the water wa in the internal spaces S3, S4 to the outside (step) (E)).

  Finally, as shown in FIGS. 10A and 10B, the water wa is discharged from the internal spaces S1 and S2 of the rectangular segment 2 and the connecting segment 4 forming the annular structure 1A, and the annular structure 1A. Is lifted, and the rectangular segment 2 and the connecting segment 4 are released from each other on the water surface wl and then removed, whereby the dismantling of the water blocking wall structure 100 is completed.

According to the water blocking wall structure 100 as described above, the operator connects the plurality of rectangular segments 2 and 6 and the connecting segments 4 and 8 to each other in the lateral direction l on the water surface wl to thereby form a rectangular ring shape. The structures 1A and 1B can be formed while being overlapped with each other. Furthermore, when the water blocking wall structure 100 is constructed and disassembled, the ups and downs of the constructed annular structures 1A and 1B can be appropriately adjusted by injecting and discharging fluid such as water or air.
The connection and disassembly of the annular structures 1A and 1B can be carried out on the water surface wl, and there is no need for underwater connection / disassembly work by a diver, and a large-scale scaffolding or rectangular segment is added to the pier bl. There is no need to temporarily install a suspension machine for suspending the members 2 and 6 and the connecting segments 4 and 8.
Furthermore, the working height from the water surface wl can be always kept at a low position, and the connection (and disassembly) of the annular structures 1A and 1B can be performed on the water surface wl, specifically at a position lower than the water surface wl. In other words, by building up the water blocking wall structure 100 on the water surface wl by adjusting the ups and downs of the annular structures 1A and 1B while overlapping each of the annular structures 1A and 1B, the construction work at a high place is performed. In addition to being able to avoid this, construction work can be performed by effectively utilizing the limited work space on the water surface. Thus, since the connection work conventionally performed by a diver in water can be performed on the water, the burden of the construction work of the water blocking wall structure 100 can be reduced, and the construction and dismantling of the water blocking wall structure 100 can be performed. The work burden and work cost in the work can be reduced.

In each of the rectangular segments 1A and 1B and the connecting segments 4 and 8 of the annular structures 1A and 1B constituting the water blocking wall structure 100, fluid such as air or liquid is provided between the internal spaces S1 to S4 and the outside. Flow-through portions (connection members V1, V2) through which flow is made are provided. Since each of the annular structures 1A and 1B is provided with a common pipe member T1 for supplying and exhausting air and a common pipe member T2 for supplying and discharging water at the flow passage portion, the annular structures 1A and 1B are raised and lowered. Can be adjusted appropriately.
Further, by providing the pipe members T1 and T2 on the inner wall side of the water blocking wall structure 100, the influence of the water flow on the pipe members T1 and T2 can be eliminated.

  Since the water blocking wall structure 100 is constructed using the box-shaped hollow segments 10A (the rectangular segments 2 and the connecting segments 4) and 10B (the rectangular segments 6 and the connecting segments 8), for example, it is constructed by a liner plate. Compared with the conventional water blocking wall, the strength against hydrostatic pressure, flowing water pressure, wave pressure, etc. is improved. Thereby, the number of the cut beams 91 which support the water blocking wall structure 100 from the inside can be reduced, and the work space ws can be secured widely.

  Further, since the water blocking wall structure 100 is constructed using the annular structures 1A and 1B having a rectangular shape in plan view, the water blocking wall structure 100 is located between the bridge pier bl and a circular ring structure having a circular shape or an elliptical shape in plan view. A large work space ws can be secured.

  Moreover, since all the annular structures 1A and 1B that construct the water blocking wall structure 100 are filled with water in the internal spaces S1 to S4 of the hollow segments 10A and 10B, the strength of the water blocking wall structure 100 is increased. And stability can be easily increased.

<Others>
Note that the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the scope of the present invention. For example, the hollow segment which concerns on a modification, and the water stop wall structure constructed | assembled by the said hollow segment are demonstrated using FIG. 11 thru | or FIG. FIG. 11 is a perspective view showing a hollow segment according to a modification in a state where the inside can be seen, (a) is a perspective view of a rectangular segment of the hollow segment, and (b) is a perspective view of a connecting segment of the hollow segment. FIG. FIG. 12 is a perspective view showing another hollow segment with the inside visible, (a) is a perspective view of a rectangular segment of the other hollow segment, and (b) is a connecting segment of the other hollow segment. FIG. FIG. 13 is a perspective view showing a water blocking wall structure in a state in which a pipe member is attached to the hollow segment of FIGS. 11 and 12.
For example, in the above embodiment, the connection members V1, V2 are formed on the inner plates 22, 42, 62, 82 of the rectangular segments 2, 6 and the connecting segments 4, 8. However, the connection members V1, V2 may be formed on the outer plates 21, 41, 61, 81 like the rectangular segments 2A, 6A and the connecting segments 4A, 8A shown in FIGS.
By providing the pipe members T1 and T2 on the outer wall side of the water blocking wall structure 100, a wide working space ws can be secured.
The rectangular segments 2A and 6A and the connecting segments 4A and 8A shown in FIGS. 11 and 12 are different from the rectangular segments 2 and 6 and the connecting segments 4 and 8 only in the installation positions of the connecting members V1 and V2. The configuration of is the same.

  Further, the tube members T1, T2 can be attached to both the inner wall or the outer wall by providing the connection members V1, V2 on the outer plates 21, 41, 61, 81 and the inner plates 22, 42, 62, 82, for example. It may be.

  Moreover, in said embodiment, although water wa was supplied to internal space S1-S4 in each hollow segment 10A, 10B via pipe member T1, T2, liquid other than water wa may be sufficient. Specifically, it is a liquid whose apparent specific gravity as a whole of the hollow segments 2, 4; 6, 8 into which the liquid has been injected is larger than the specific gravity of water or seawater in which the water blocking wall structure 100 is constructed. That's fine.

Moreover, in said embodiment, although internal space S1-S4 in each hollow segment 10A, 10B is divided and formed in multiple steps by partition plates 26, 46, 66, 86, each hollow segment 10A 10B, the partition plates 26, 46, 66, 86 may be omitted if the strength against hydrostatic pressure, flowing water pressure, wave pressure, etc. is sufficient.
Further, the outer plates 21, 41, 61, 81 and the inner plates 22, 42, 62, 82 in the rectangular segments 2, 6 and the connecting segments 4, 8 may be one. In this case, the partition plates 26, 46 , 66, 86 are not provided. The dimensions of the hollow segments 10A and 10B in the height direction h are appropriately changed according to the number of the outer plates 21, 41, 61, 81 and the inner plates 22, 42, 62, 82.

  In the above embodiment, the annular members 1A and 1B are provided with the pipe members T1 and T2, respectively. However, the flow-through portions (connection members) in the rectangular segments 2 and 6 and the connecting segments 4 and 8 are provided. The supply / discharge portions T1b and T2b of the tube members T1 and T2 may be directly attached to V1 and V2), respectively.

Moreover, in the said embodiment, internal space S1-S4 in each rectangular segment 2,6 and connection segment 4,8 was mutually independent. However, for example, the inner spaces S1 to S4 of the respective rectangular segments 2, 6 and the connecting segments 4, 8 connected in the lateral direction 1 are formed in the side plates 25, 45, 65, 85 by forming through holes. The internal spaces S1 to S4 of the rectangular segments 2 and 6 and the connecting segments 4 and 8 connected in the height direction are connected to the upper plates 23, 43, 63, 83 and the lower plates 24, 44, A through hole may be formed in 64 and 84 to communicate with each other.
In this case, the flow-through portion may be provided in, for example, the rectangular segments 2 and 6 and the connecting segments 4 and 8 at positions facing each other in the circumferential direction of the annular structures 1A and 1B. Thereby, at the time of water injection to the internal spaces S1 to S4, the annular structures 1A and 1B can be prevented from being excessively inclined to one side.

  Further, although not described in the above embodiment, a packing member (not shown) is provided at the connecting portion between the rectangular segments 2 and 6 and the connecting segments 4 and 8 for the purpose of water stoppage. ing. That is, in each of the rectangular segments 2 and 6 and the connecting segments 4 and 8, packing members are attached to the wall surfaces of the upper plates 23 and 43, the lower plates 24 and 44, and the side plates 25 and 45.

  In the above-described embodiment, the water blocking wall structure 100 is formed in a rectangular shape in plan view by the annular structures 1A and 1B having a rectangular shape in plan view. The shape is not limited to this, and may be, for example, a triangular shape or a polygonal shape in plan view that is a pentagon or more. In this case, the design of the rectangular segments 2 and 6 and the connecting segments 4 and 8 may be appropriately changed according to the plan view shape of the water blocking wall structure 100.

  In the above embodiment, the water blocking wall structure 100 is formed of the annular structures 1A and 1B. For example, when repairing a part of the quay structure, the annular structures 1A and 1B. May be formed in a U shape or C shape in plan view with respect to the quay structure.

1,1A, 1B Ring structure (connector)
10A, 10B Hollow segment 2, 6 Rectangular segment 21, 61 Outer plate 22, 62 Inner plate 26, 66 Partition plate (partition wall)
4,8 Connecting segment 41, 81 Outer plate 42, 82 Inner plate 46, 86 Partition plate (partition wall)
100 Water stop wall structures S1 to S4 Internal spaces T1, T2 Pipe members V1, V2 Connection member wl Water surface ws Work space (water-stopped space)

Claims (11)

A method for constructing a water blocking wall structure in which a hollow segment, in which an internal space is defined by a wall surface, is connected in a horizontal direction and a vertical direction, and a space that is stopped at least partially between the structure and the structure submerged is secured. Because
The hollow segment floating on the water surface and connected to each other laterally to form a connected body (A);
A step (B) of stacking and connecting the hollow segments to the connection body formed in the step (A) to form another connection body;
Injecting a liquid into the internal space of the hollow segment forming at least one of the coupling bodies in water (C);
A construction method of a water blocking wall structure characterized by comprising:   After the steps (A) and (B) are repeated to stack the connection body to a predetermined height, in the step (C), liquid is formed in the internal space of the hollow segment forming the lowest connection body. The method for constructing a water blocking wall structure according to claim 1, wherein:   The method for constructing a water blocking wall structure according to claim 1, further comprising a step (D) of injecting a liquid into the internal space of all the stacked hollow segments. A dismantling method of a water blocking wall structure constructed by the method according to any one of claims 1 to 3,
Supplying air into the internal space of the hollow segment filled with the liquid (E);
In the connector floated on the water, the step of releasing the connection between the hollow segments and removing the hollow segments (F),
A dismantling method for a water blocking wall structure, comprising: A water blocking wall structure constructed so as to secure a water stopped space between at least a part of the submerged structure,
An outer plate that forms an outer wall; an inner plate that forms an inner wall; and a wall portion that covers a space between the outer plate and the inner plate, and is closed to the outside by the outer plate, the inner plate, and the wall portion. A plurality of hollow segments in which a defined internal space is defined;
A plurality of the hollow segments are connected in the lateral direction to form a connection body, and the connection body is stacked in a plurality.
The water blocking wall structure, wherein the internal space of the hollow segment forming at least a part of the connection body below the water surface of the connection body is filled with a liquid.   The said internal space of the said hollow segment is divided | segmented by the at least 1 partition wall, The hole which connects the said divided | segmented internal spaces is formed in the said partition wall. Water barrier structure.   At least one of the outer plate and the inner plate of at least one of the plurality of hollow segments is provided with a flow passage portion for allowing fluid to flow between the outside and the inner space. The water blocking wall structure according to claim 5 or 6.   The water blocking wall structure according to claim 7, further comprising a pipe member attached to the flow passage portion for allowing the fluid to flow between the outside and the internal space.   The said wall part is formed with the hole which connects the said interior spaces of the said hollow segment adjacent to the horizontal direction and the vertical direction, The stop as described in any one of Claim 5-8 characterized by the above-mentioned. Water wall structure.   The water blocking wall structure according to any one of claims 5 to 9, which is constructed so as to surround the structure in a rectangular shape in plan view.   The water blocking wall structure according to any one of claims 5 to 10, wherein the internal spaces of all the hollow segments are filled with water.

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