WO2014156864A1 - Construction method for temporary floating cofferdam - Google Patents

Construction method for temporary floating cofferdam Download PDF

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Publication number
WO2014156864A1
WO2014156864A1 PCT/JP2014/057485 JP2014057485W WO2014156864A1 WO 2014156864 A1 WO2014156864 A1 WO 2014156864A1 JP 2014057485 W JP2014057485 W JP 2014057485W WO 2014156864 A1 WO2014156864 A1 WO 2014156864A1
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WO
WIPO (PCT)
Prior art keywords
block
temporary
closing structure
temporary closing
construction method
Prior art date
Application number
PCT/JP2014/057485
Other languages
French (fr)
Japanese (ja)
Inventor
坂元　浩二
豊生 安田
祐之 阿久根
一貴 吉永
侃彦 藤澤
栄世 岩村
悦久 高田
紀夫 滝口
完幸 秋山
藤野　賢一
修 宮本
宏朗 田窪
京一 仲保
拓也 神藤
Original Assignee
鹿島建設株式会社
日立造船株式会社
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Publication date
Application filed by 鹿島建設株式会社, 日立造船株式会社 filed Critical 鹿島建設株式会社
Publication of WO2014156864A1 publication Critical patent/WO2014156864A1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00—Keeping dry foundation sites or other areas in the ground
    • E02D19/02—Restraining of open water
    • E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters

Definitions

  • the present invention relates to a construction method of a floating temporary crusher using a temporary crush structure having a bottom portion and a side wall portion including a plurality of blocks and having a partial side face opened.
  • a temporary shutoff structure is installed on the object, and a portion surrounded by the object and the temporary shutoff structure is drained to work space May form.
  • the temporary closing structure is installed at a predetermined position by suspending and connecting the doors of the temporary closing structure one by one at the temporary closing installation position.
  • FIG. 8 is a view showing a method of installing the temporary closing structure 101 by the floating method.
  • 8 (a) shows a step of towing the temporary closing structure 101
  • FIG. 8 (b) shows a step of making the temporary closing structure 101 in a substantially vertical state
  • FIG. FIG. 10 is a view showing a process of installing the temporary closing structure 101 on the levee 103.
  • the floating method after temporarily assembling the temporary closing structure 101 on land, as shown in FIG. 8A, the temporary closing structure 101 floats on the water surface and is towed in a laid state. Then, water is poured into the temporary closing structure 101, and floats on the water surface in a substantially vertical state as shown in FIG. 8 (b). Thereafter, as shown in FIG. 8C, the temporary closing structure 101 is installed on the levee 103 (see, for example, Patent Document 1).
  • the present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a floating body in which a temporary closing structure can be assembled without performing diving work under deep water conditions in a limited space on water. It is to provide a construction method of a temporary cofferdam.
  • the present invention is a construction method of a floating type temporary closing structure using a temporary closing structure which is constituted by a bottom portion and a side wall portion consisting of a plurality of blocks and a part of side surfaces are opened.
  • the lower block is connected above the bottom with the bottom suspended above the water surface, and the upper block is connected above the lower block in step (a) of sinking to a predetermined depth.
  • the step of forming the temporary closing structure by repeating the operation of sinking to a predetermined depth a plurality of times to form the temporary closing structure, and the temporary closing structure being floated and towed in a standing state, and installed on the wall surface of the levee
  • It is a construction method of a floating type temporary cofferdam characterized by comprising a process (c) and a process (d) which drains the inside surrounded by the temporary closing structure and the wall surface of the dike, and (d). .
  • the operation of connecting the upper block to the upper side of the lower block and sinking to a predetermined depth is repeated a plurality of times to form the temporary closing structure. Therefore, it is possible to assemble the temporary closing structure in a limited space above the water without performing a diving operation under deep water conditions.
  • connection structure for connecting the blocks in such a manner as to allow a predetermined amount of movement in the horizontal direction is provided at the butt portion of the lower block and the upper block.
  • the connection structure is formed, for example, by connecting a first connection metal provided in the lower block and a second connection metal provided in the upper block with a bolt, and the first connection metal is formed. And the second connecting piece are spaced apart from each other, and the bolt is deformable between the first connecting piece and the second connecting piece.
  • Each block which comprises a temporary closing structure can be made to follow the non-land of a wall surface, and it can be installed so that waterproofness may not be impaired.
  • a watertight rubber provided along the edge of one block and a rubber abutment provided along the edge of the other block It is desirable that a water blocking structure formed by contacting while deforming is provided. Thereby, the waterproofness of the butted portion of the lower block and the upper block is reliably ensured.
  • the top end of the temporary closing structure may be provided with a flap type movable lid.
  • a step (e) of installing a U-shaped rubber gasket in a portion of the temporary closing structure facing the wall surface of the bank is further provided. It is desirable to have it. As a result, since the water blocking member can be continuously installed on the door contact surface of the temporary closing structure, waterproofness between the temporary closing structure and the bank body is reliably ensured.
  • the construction method of the floating type temporary crusher which can assemble a temporary shutoff structure in a limited space on water without performing a diving operation in deep water conditions can be provided.
  • FIG. 1A is a front view of the temporary closing structure 1
  • FIG. 1B is a view seen from the direction of arrow A in FIG. 1A
  • 1 (c) is a view as seen from the direction of arrow C in FIG. 1 (b)
  • FIG. 1 (d) is a cross-sectional view taken along the line BB in FIG. 1 (a).
  • 2 (a) to 2 (d) are diagrams showing an assembly process of the temporary closing structure 1 It is a figure which shows the detail of the connection structure 11 and the water stop structure 13
  • FIG. 3 (a) is a figure which shows the state before connection of a block
  • FIG.3 (b) is a figure which shows the state after connection of a block.
  • FIG. 1A is a front view of the temporary closing structure 1
  • FIG. 1B is a view seen from the direction of arrow A in FIG. 1A
  • 1 (c) is a view as seen from the direction of arrow C in FIG. 1 (b)
  • FIG. 4A is a cross-sectional view of the rubber gasket 21, and FIG. 4B is an elevation view of the rubber gasket 21.
  • FIG. 5A is a view showing a step of aligning the rubber gasket 21.
  • FIG. 5B is a cross-sectional view taken along the line HH of FIG. 5A.
  • 5 (c) shows a state in which the rubber gasket 21 is attached
  • FIG. 5 (d) is a cross-sectional view taken along the line II of FIG. 5 (c)
  • FIG. 5 (e) is FIG. The enlarged view of the range G shown to d).
  • 6 (a) is an elevation view of the temporary closing structure 2
  • FIG. 6 (b) is a side view of the temporary closing structure 2
  • FIG. 6 (c) is a view showing an outline of the temporary closing structure 2.
  • FIG. 2 is a horizontal sectional view of a temporary shutoff structure 2;
  • FIG. 7 (a) is an enlarged view of the range J shown in FIG. 6 (a), and
  • FIG. 7 (b) is an enlarged view of the range K shown in FIG. 6 (b).
  • Fig. 7 (c) is an enlarged view of a range M shown in Fig. 6 (c).
  • FIG. 8 (a) is a figure which shows the process of towing the conventional temporary closing structure 101
  • FIG.8 (b) is the conventional
  • FIG. 8C is a view showing a step of installing the conventional temporary closing structure 101 on the levee 103, showing a step of making the temporary closing structure 101 of the second embodiment substantially vertical.
  • FIG. 1 is a view showing an outline of a temporary closing structure 1.
  • FIG. 1A is a front view of the temporary closing structure 1.
  • FIG. 1 (b) is a side view of the temporary closing structure 1.
  • FIG. 1 (b) is a view seen from the direction of arrow A shown in FIG. 1 (a).
  • FIG. 1 (c) is a rear view of the temporary closing structure 1.
  • FIG. 1 (c) is a view seen from the direction of arrow C shown in FIG. 1 (b).
  • FIG. 1D is a horizontal cross-sectional view of the block 3 constituting the temporary closing structure 1.
  • FIG. 1 (d) is a cross-sectional view along arrow BB shown in FIG. 1 (a).
  • the temporary closing structure 1 includes a bottom 5, a side wall 7, a movable lid 6, and the like.
  • the side wall 7 comprises a plurality of blocks 3 stacked one on top of the other.
  • a water blocking structure 13 is formed at the abutment portion between the lower block 3 and the upper block 3. Details of the water blocking structure 13 will be described later.
  • the lower block 3 and the upper block 3 are connected by a connecting structure 11 which is connected to allow movement of a predetermined amount in the horizontal direction. Details of the connection structure 11 will be described later.
  • the temporary closing structure 1 has a shape in which a part of the side surface is opened.
  • the block 3 which comprises the temporary closing structure 1 is provided with the some partition 25 inside.
  • the interior of block 3 is divided by partitions 25 into a plurality of spaces 23.
  • a water supply and drainage valve 9 is provided in the block 3 of the predetermined number of stages in the lower stage.
  • the pouring and draining valve 9 is disposed in each space 23 of the block 3.
  • the movable lid 6 is provided at the top end 18 of the temporary closing structure 1.
  • the movable cover 6 has a rotational support near the end 17 of the top end 18.
  • the movable lid 6 is a flap type lid and opens and closes as indicated by an arrow E.
  • the end portion 17 of the temporary closing structure 1 which is a portion facing the wall surface of the levee, includes a wood 19 and a U-shaped rubber gasket 21.
  • a water blocking structure 15 is formed. Details of the water blocking structure 15 will be described later.
  • FIG. 2 is a view showing a method of assembling the temporary closing structure 1.
  • the temporary shutoff structure 1 shown in FIG. 1 is assembled, for example, between a barge 27 and a barge 29 floating on a water surface 37, as shown in FIG.
  • a structure support rack 31 having a chain block 33 is installed on the barge 27.
  • a crawler crane 35 is installed on the base ship 29.
  • the lowermost block 3-1 is connected above the bottom 5 and is sunk to a predetermined depth. Thereafter, the operation of connecting the upper block 3 above the lower block 3 and sinking the block 3 to a predetermined depth is repeated a plurality of times until the connection of the n stages of the blocks 3 is completed.
  • FIG. 2 (a) to FIG. 2 (c) show the process of connecting block 3-4 to block 3-3.
  • a method of connecting the blocks 3 will be described with reference to FIGS. 2A to 2C and taking the blocks 3-3 and 3-4 as examples.
  • the upper block 3-4 is suspended using the crawler crane 35 above the lower block 3-3 suspended by the chain block 33.
  • the lower block 3-3 and the upper block 3-4 are connected by the connecting structure 11 (FIG. 1).
  • the water blocking structure 13 (FIG. 1) shuts off between the lower block 3-3 and the upper block 3-4.
  • the chain block 33 and the crawler crane 35 are simultaneously lowered. . Then, the temporary closing structure 1 being assembled is sunk to a predetermined depth (a position where the self weight including the ballast water weight and the buoyancy are suspended).
  • ballast water is injected into the predetermined space 23 (FIG. 1 (d)) in the lower blocks 3-1, 3-2.
  • the block 33 and the crawler crane 35 are simultaneously lowered.
  • the temporary closing structure 1 being assembled is sunk to a predetermined depth (a position where the self weight including the ballast water weight and the buoyancy are suspended), and the chain block 33 is changed from the block 3-3 to the block 3-4.
  • FIG. 3 is a view showing the details of the connection structure 11 and the water stop structure 13. Below, the connection structure 11 which connects the lower block 3 and the upper block 3 and the water blocking structure 13 between the lower block 3 and the upper block 3 will be described with reference to FIG.
  • FIG. 3 (a) is a view showing a state before the connection of the butt portions of the upper block 3 and the lower block 3.
  • the upper block 3 is formed by connecting metal 41a on the outer side 43a and the inner side 43b of the temporary closing structure 1 at a predetermined distance 39a from the lower surface 45a. It is fixed. Further, in the lower block 3, the connection metal 41 b is fixed to the lower side at a predetermined distance 39 b from the upper surface 45 b.
  • the connecting hardware 41a, 41b comprises a horizontal connecting plate 42a and a vertical rib 42b.
  • a bearing plate 47 is provided on the lower surface 45a and the upper surface 45b of the upper block 3 and the lower block 3, respectively.
  • the upper block 3 is provided with a water-tight rubber 49 having a P-type cross section on the entire length of the lower edge of the outer side surface 43 a of the temporary closing structure 1.
  • the watertight rubber 49 is arranged such that the circular portion of the P-type protrudes by a small amount from the lower surface 45a of the block 3 in the upper stage.
  • the lower block 3 is provided with a rubber contact portion 51 on the entire length of the upper edge of the side surface 43a.
  • FIG. 3 (b) is a view showing a state after connection of the butt parts of the block 3 in the upper stage and the block 3 in the lower stage.
  • the connecting structure 11 passes the bolt 53 through the first connecting metal 41b provided in the lower block 3 and the second connecting metal 41a provided in the upper block 3 And the bolt 53 is fixed at the position of the connecting plate 42a.
  • the first connecting metal 41b and the second connecting metal 41a are arranged at a predetermined distance, and the bolt 53 is between the first connecting metal 41b and the second connecting metal 41a. It is deformable. As a result, the lower block 3 and the upper block 3 are allowed to move by a predetermined amount in the horizontal direction.
  • the water blocking structure 13 is formed by bringing a circular portion of the P-type watertight rubber 49 into contact with the rubber contact portion 51 while deforming it.
  • the bearing plate 47 of the lower surface 45 a of the upper block 3 and the bearing plate 47 of the upper surface 45 b of the lower block 3 are in contact with each other.
  • FIG. 2D is a view showing a process of attaching the rubber gasket 21 to the temporary closing structure 1 after the connection work of the blocks 3 is completed.
  • FIG. 4 is a view showing an outline of the rubber gasket 21, and
  • FIG. 5 is a view showing a method of attaching the rubber gasket 21. As shown in FIG. The outline of the rubber gasket 21 and the method of attaching it to the temporary shut-off structure 1 will be described below with reference to FIGS. 2 (d), 4 and 5.
  • FIG. 1 The outline of the rubber gasket 21 and the method of attaching it to the temporary shut-off structure 1 will be described below with reference to FIGS. 2 (d), 4 and 5.
  • FIG. 4A is a cross-sectional view of the rubber gasket 21, and FIG. 4B is an elevation view of the rubber gasket 21.
  • FIG. 4 (a) is a cross-sectional view taken along the arrow FF shown in FIG. 4 (b).
  • the rubber gasket 21 is U-shaped.
  • the rubber gasket 21 consists of the main body 21a and the fixing
  • the main body 21a has a single nose 21c at the center of the upper surface.
  • the compression amount 57 of the main body 21a is the nose height 55 + ⁇ of the nose 21c, and desirably about 50 to 60 mm.
  • the fixing portion 21 b is provided so as to protrude in the direction of both sides from the lower surface of the main body 21 a.
  • the fixing portion 21 b has a hole 59.
  • FIG. 5 (a) and 5 (b) show the process of aligning the rubber gasket 21.
  • FIG. FIG. 5 (b) is a cross-sectional view taken along arrows HH shown in FIG. 5 (a).
  • 5 (c) to 5 (e) are views showing a state in which the rubber gasket 21 is attached.
  • FIG. 5 (d) is a cross-sectional view taken along arrow II shown in FIG. 5 (c).
  • FIG.5 (e) is an enlarged view of the range G shown in FIG.1 (d).
  • FIG. 2 (d) When assembling the temporary closing structure 1, after forming all the side walls 7 by connecting all the blocks 3 by the method described with FIG. 2 (a) to FIG. 2 (c) as an example, FIG. 2 (d)
  • the rubber gasket 21 is suspended in water using a crawler crane 35 as shown in FIG.
  • the rubber gasket 21 is suspended on the end 17 side of the temporary closing structure 1. It is desirable to attach a balance weight 91 to the lower end of the rubber gasket 21 in order to maintain the shape and posture of the rubber gasket 21.
  • the wood 19 is disposed at the end 17 of the temporary closing structure 1. As shown in FIG. 5A, the wood 19 is disposed on both sides of the end 17 of each block 3. Long bolts 61 are disposed between the woods 19. Further, as shown in FIG. 5 (b), short bolts 63 are also arranged. The long bolt 61 and the short bolt 63 are fixed to the block 3.
  • the rubber gasket 21 suspended in water as shown in FIG. 2 (d) is positioned so that the hole 59 overlaps the tip of the long bolt 61, as shown in FIGS. 5 (a) and 5 (b). . Then, the long bolt 61 is inserted into the hole 59, and as shown in FIG. 5C, the rubber gasket 21 is attached between the woods 19 of each block 3. The wood 19 is thinner than the rubber gasket 21.
  • the long bolt 61 of the block 3 is inserted into the hole 59 of the rubber gasket 21, as shown in FIGS. 5 (d) and 5 (e)
  • the positions of the remaining holes of the rubber gasket 21 and the short bolts 63 of the block 3 are obtained.
  • the fitting and the insertion of the short bolts 63 into the remaining holes take place simultaneously. Thereby, the rubber gasket 21 can be easily attached to the temporary closing structure 1.
  • FIG. 6 is a view showing an outline of the temporary shutoff structure 2.
  • 6 (a) is an elevation view of the temporary closing structure 2
  • FIG. 6 (b) is a side view of the temporary closing structure 2
  • FIG. 6 (c) is a horizontal sectional view of the temporary closing structure 2.
  • FIG. 6 (c) is a cross-sectional view taken along arrow L--L shown in FIG. 6 (b).
  • FIG. 7 is a view showing the details of the temporary shutoff structure 2.
  • FIG. 7A is a front view of the uplift prevention mechanism 65.
  • FIG. Fig.7 (a) is an enlarged view of the range J shown to Fig.6 (a).
  • FIG. 7 (b) is a side view of the uplifting prevention mechanism 65.
  • FIG. 7 (b) is an enlarged view of the range K shown in FIG. 6 (b).
  • FIG. 7C is a horizontal sectional view around the stopper 85.
  • FIG. FIG.7 (c) is an enlarged view of the range M shown in FIG.6 (c).
  • the temporary closing structure 2 is formed by draining the inside 89 surrounded by the temporary closing structure 1 and the wall surface 68 of the bank 69 after the temporary closing structure 1 is installed in the bank 69.
  • a door stop 67 is installed in a frame shape on the wall surface 68 of the dam 69.
  • the door stop 67 is fixed to the wall surface 68 of the dam 69 by using the anchor metal 87a and the anchor metal 87b, as shown in FIG. 7 (c).
  • the temporary closing structure 1 assembled in each process shown in FIG. 2 is floated in a standing state, and is towed near the planned installation position of the dam 69.
  • the edge part 17 of the temporary closing structure 1 is arrange
  • an anti-lifting mechanism 65 is installed between the top end 18 of the temporary closing structure 1 and the wall surface 68 of the dam 69.
  • a stopper 85 is installed between the side wall 7 of the temporary closing structure 1 and the wall surface 68 of the dam 69.
  • the floating preventing mechanism 65 is formed by the floating preventing anchor 73, the flange portion 71, the sliding plate 77, the hanging rod 75, and the like.
  • the anti-lifting anchor 73 is a plate-like member having a grid-like reinforcing material 83.
  • the anti-lifting anchor 73 is fixed to the wall surface 68 of the dam 69 by an anchor bolt 79.
  • the flange portion 71 is disposed between the lower end surface 81 of the anti-lifting anchor 73 and the top end 18 of the temporary closing structure 1.
  • the ridge portion 71 is disposed along the wall surface 68 of the dam 69, and the formation length 76 of the ridge portion 71 from the wall surface 68 is a length 80 from the wall surface 68 to the floating core 78 of the temporary closing structure 1 (see FIG. It shall be shorter than 6 (b).
  • the sliding plate 77 is provided between the flange portion 71 and the top end 18 of the temporary closing structure 1.
  • the ridge portion 71 may be in contact with the top end 18 of the temporary closing structure 1 via the sliding plate 77, and does not have to be connected to the top end 18.
  • the hanging rod 75 connects the top end 18 of the temporary closing structure 1 and the anti-lifting anchor 73.
  • the end of the suspension rod 75 on the side of the anti-lifting anchor 73 is connected to, for example, the reinforcing member 83.
  • the brim portion 71 supports the buoyancy of the temporary closing structure 1, and prevents lifting.
  • the formation length 76 of the flange portion 71 is shorter than the length 80 from the wall surface 68 to the floating core 78 of the temporary closing structure 1.
  • the sliding plate 77 enables horizontal movement of the uppermost block 3 of the temporary closing structure 1.
  • the suspension rod 75 prevents the temporary closing structure 1 from sinking when the water level drops abnormally.
  • one end of the stopper 85 is connected to the inner side surface 43 a of the side wall 7 of the temporary closing structure 1.
  • the stopper 85 is connected at the other end to the anchor metal 87 a of the door stop 67.
  • the stopper 85 prevents the temporary closing structure 1 from separating from the levee body 69 by earthquake motion or the like.
  • the rubber gasket 21 compressed and deformed to a thickness comparable to that of the wood 19 and 19 makes contact with the door contact 67.
  • the water blocking structure 15 is formed.
  • the wood 19 prevents positional deviation of the temporary closing structure 1 by friction with the door stop 67.
  • the rubber gasket 21 prevents the movement of water between the inside and the outside of the temporary closing structure 1.
  • the movable cover 6 is installed on the top end 18. Then, the inside 89 surrounded by the temporary closing structure 1 and the wall surface 68 of the dam 69 is drained to complete the temporary closing.
  • the temporary closing structure 1 formed by repeating the operation of connecting the upper block 3 above the lower block 3 and sinking to a predetermined depth a plurality of times is erected. It floats and is towed and installed on the wall 68 of the dam 69. Thereby, temporary closing structure 1 can be assembled in a limited space on water without performing diving work under deep water conditions, and temporary closing structure 2 can be formed.
  • a rubber gasket 21 having a predetermined compression margin is installed at the end 17 opposed to the wall surface 68 of the dam 69, as a water blocking member, according to the end 17 and having a U shape. . Even when there is a gap in the door stop 67, the water gasket 15 between the end 17 of the temporary shut-off structure 1 and the door lock 67 can be assured by compressing and deforming the rubber gasket 21 while following the gap. It can be
  • the watertight rubber 49 provided along the lower edge of the upper block 3 and the upper edge of the lower block 3 are provided at the abutment portion between the lower block 3 and the upper block 3
  • a water blocking structure 13 is provided, in which the rubber contact portion 51 is brought into contact with the watertight rubber 49 while being deformed.
  • a flap type movable lid 6 is provided at the top end 18. In this way, it is possible to prepare for rising of the dam water level due to abnormal water discharge.
  • the floating prevention mechanism 65 In the temporary closing structure 2, by installing the floating prevention mechanism 65, floating of the temporary closing structure 1 can be prevented at the time of rising of the water level by the flange portion 71 of the floating prevention mechanism 65.
  • the sliding plate 77 enables horizontal movement of the uppermost block 3 of the temporary closing structure 1.
  • the suspension rod 75 can prevent the temporary closing structure 1 from sinking when the water level is lowered.
  • the horizontal cross-sectional shape of the temporary closing structure 1 is not restricted to what was shown in FIG.1 (d).
  • the temporary closing structure 1 may be formed of a bottom portion and a side wall portion formed of a plurality of blocks, and it is sufficient that a part of the side surface is opened.
  • not the wood 19 but steel may be disposed on both sides of the rubber gasket 21 of the water blocking structure 15.
  • a hanging rope may be used instead of the hanging rod 75 as a hanging member.

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Abstract

A lower-most block (3) is connected on top of a base (5) while the base (5) is floating on water, and then sunk to a predetermined depth. Then, an upper block (3) is connected on top of the lower block (3) using a connecting structure (11) allowing for a predetermined amount of relative movement between the blocks in the horizontal direction and sunk to a predetermined depth, the abovementioned work process being repeated multiple times. Once all the blocks (3) are connected, a U-shaped rubber gasket (21) is set on an end part (17) of the temporary cofferdam structure (1) to form the temporary cofferdam structure (1). Next, the temporary cofferdam structure (1) is floated and towed in an upright state, and set on a wall surface (68) of a dam (69). A flap-type movable lid (6) is disposed on the top end (18) of the temporary cofferdam structure (1). Then, the interior space enclosed by the temporary cofferdam structure (1) and the wall surface (68) of the dam (69) is drained.

Description

浮体式仮締切り工の施工方法Construction method of floating type temporary cofferdam
　本発明は、底部および複数のブロックからなる側壁部により構成され一部の側面が開放された仮締切り構造体を用いた浮体式仮締切り工の施工方法に関する。 The present invention relates to a construction method of a floating temporary crusher using a temporary crush structure having a bottom portion and a side wall portion including a plurality of blocks and having a partial side face opened.
　従来、ダム等の水中の対象物において、水中側からの工事を行う場合、対象物に仮締切り構造体を設置し、対象物と仮締切り構造体とに囲まれた部分を排水して作業空間を形成することがある。台座コンクリート式工法では、仮締切り据付位置において、仮締切り構造体の扉体を一段ずつ吊り込んで連結することにより、所定の位置に仮締切り構造体を設置する。 Conventionally, in an underwater object such as a dam, when performing construction from the underwater side, a temporary shutoff structure is installed on the object, and a portion surrounded by the object and the temporary shutoff structure is drained to work space May form. In the pedestal concrete type construction method, the temporary closing structure is installed at a predetermined position by suspending and connecting the doors of the temporary closing structure one by one at the temporary closing installation position.
　図８は、浮体式工法による仮締切り構造体１０１の設置方法を示す図である。図８（ａ）は、仮締切り構造体１０１を曳航する工程を示す図、図８（ｂ）は、仮締切り構造体１０１を略垂直の状態にする工程を示す図、図８（ｃ）は、仮締切り構造体１０１を堤体１０３に設置する工程を示す図である。浮体式工法では、仮締切り構造体１０１を陸上で事前に組み立てた後、図８（ａ）に示すように、寝かせた状態で水面に浮かせて曳航する。そして、仮締切り構造体１０１内に注水し、図８（ｂ）に示すように、略垂直な状態で水面に浮かせる。その後、図８（ｃ）に示すように、堤体１０３に仮締切り構造体１０１を設置する（例えば、特許文献１参照）。 FIG. 8 is a view showing a method of installing the temporary closing structure 101 by the floating method. 8 (a) shows a step of towing the temporary closing structure 101, FIG. 8 (b) shows a step of making the temporary closing structure 101 in a substantially vertical state, and FIG. FIG. 10 is a view showing a process of installing the temporary closing structure 101 on the levee 103. In the floating method, after temporarily assembling the temporary closing structure 101 on land, as shown in FIG. 8A, the temporary closing structure 101 floats on the water surface and is towed in a laid state. Then, water is poured into the temporary closing structure 101, and floats on the water surface in a substantially vertical state as shown in FIG. 8 (b). Thereafter, as shown in FIG. 8C, the temporary closing structure 101 is installed on the levee 103 (see, for example, Patent Document 1).
特許第４５８８８０４号公報Patent No. 4588804
　しかしながら、浮体式工法において、仮締切り構造体を陸上で事前に組み立てるための作業空間が確保できない場合があった。  However, in the floating method, there is a case where a working space for assembling the temporary closing structure in advance on land can not be secured.
　本発明は、前述した問題点に鑑みてなされたもので、その目的とすることは、水上の限られた空間で、大水深条件での潜水作業を行うことなく仮締切り構造体を組み立てられる浮体式仮締切り工の施工方法を提供することである。 The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a floating body in which a temporary closing structure can be assembled without performing diving work under deep water conditions in a limited space on water. It is to provide a construction method of a temporary cofferdam.
　前述した目的を達成するために、本発明は、底部および複数のブロックからなる側壁部により構成され一部の側面が開放された仮締切り構造体を用いた浮体式仮締切り工の施工方法であって、底部を水面上に浮遊させた状態で、前記底部の上方に最下段のブロックを連結し、所定の深度まで沈下させる工程（ａ）と、下段のブロックの上方に上段のブロックを連結して所定の深度まで沈下させる作業を複数回繰り返して仮締切り構造体を形成する工程（ｂ）と、前記仮締切り構造体を、起立した状態で浮遊させて曳航し、堤体の壁面に設置する工程（ｃ）と、前記仮締切り構造体と前記堤体の壁面とに囲まれた内部を排水する工程（ｄ）と、を具備することを特徴とする浮体式仮締切り工の施工方法である。 In order to achieve the above-mentioned object, the present invention is a construction method of a floating type temporary closing structure using a temporary closing structure which is constituted by a bottom portion and a side wall portion consisting of a plurality of blocks and a part of side surfaces are opened. The lower block is connected above the bottom with the bottom suspended above the water surface, and the upper block is connected above the lower block in step (a) of sinking to a predetermined depth. The step of forming the temporary closing structure by repeating the operation of sinking to a predetermined depth a plurality of times to form the temporary closing structure, and the temporary closing structure being floated and towed in a standing state, and installed on the wall surface of the levee It is a construction method of a floating type temporary cofferdam characterized by comprising a process (c) and a process (d) which drains the inside surrounded by the temporary closing structure and the wall surface of the dike, and (d). .
　本発明では、下段のブロックの上方に上段のブロックを連結して所定の深度まで沈下させる作業を複数回繰り返して仮締切り構造体を形成する。そのため、水上の限られた空間で、大水深条件での潜水作業を行うことなく仮締切り構造体を組み立てることができる。 In the present invention, the operation of connecting the upper block to the upper side of the lower block and sinking to a predetermined depth is repeated a plurality of times to form the temporary closing structure. Therefore, it is possible to assemble the temporary closing structure in a limited space above the water without performing a diving operation under deep water conditions.
　前記下段のブロックと前記上段のブロックとの突合せ部分には、前記ブロック同士を、水平方向の所定量の移動を許容するように連結する連結構造が設けられることが望ましい。前記連結構造は、例えば、前記下段のブロックに設けられた第１の連結金物と前記上段のブロックに設けられた第２の連結金物とをボルトにより連結して形成され、前記第１の連結金物と前記第２の連結金物が所定の間隔をおいて配置され、前記ボルトが、前記第１の連結金物と前記第２の連結金物との間で変形可能である。 It is preferable that a connection structure for connecting the blocks in such a manner as to allow a predetermined amount of movement in the horizontal direction is provided at the butt portion of the lower block and the upper block. The connection structure is formed, for example, by connecting a first connection metal provided in the lower block and a second connection metal provided in the upper block with a bolt, and the first connection metal is formed. And the second connecting piece are spaced apart from each other, and the bolt is deformable between the first connecting piece and the second connecting piece.
　下段のブロックと上段のブロックとを、水平方向の所定量の移動を許容するように連結することにより、堤体の壁面に不陸がある場合に、仮締切り構造体と堤体との間の止水性を損なわないよう、仮締切り構造体を構成する各ブロックを壁面の不陸に追随させて設置することができる。 By connecting the lower block and the upper block so as to allow movement of a predetermined amount in the horizontal direction, when there is a land surface on the wall of the bank, the space between the temporary shutoff structure and the bank is Each block which comprises a temporary closing structure can be made to follow the non-land of a wall surface, and it can be installed so that waterproofness may not be impaired.
　前記下段のブロックと前記上段のブロックとの突合せ部分には、一方のブロックの縁に沿って設けられた水密ゴムと他方のブロックの縁に沿って設けられたゴム当たり部とを、前記水密ゴムを変形させつつ接触させて形成される止水構造が設けられることが望ましい。
　これにより、下段のブロックと上段のブロックとの突合せ部分の止水性が確実に確保される。 In the abutment portion between the lower block and the upper block, a watertight rubber provided along the edge of one block and a rubber abutment provided along the edge of the other block, It is desirable that a water blocking structure formed by contacting while deforming is provided.
Thereby, the waterproofness of the butted portion of the lower block and the upper block is reliably ensured.
　前記仮締切り構造体の天端には、フラップ式の可動蓋を設けてもよい。
　可動蓋を設けることにより、異常出水によるダム水位上昇に備えることができる。 The top end of the temporary closing structure may be provided with a flap type movable lid.
By providing the movable lid, it is possible to prepare for rising of the dam water level due to abnormal water discharge.
　前記工程（ｂ）と前記工程（ｃ）との間には、前記仮締切り構造体の、前記堤体の壁面と対向する部分に、Ｕ字状のゴムガスケットを設置する工程（ｅ）をさらに具備することが望ましい。
　これにより、仮締切り構造体の戸当たり面に、止水部材を連続して設置することができるため、仮締切り構造体と堤体との間の止水性が確実に確保される。 Between the step (b) and the step (c), a step (e) of installing a U-shaped rubber gasket in a portion of the temporary closing structure facing the wall surface of the bank is further provided. It is desirable to have it.
As a result, since the water blocking member can be continuously installed on the door contact surface of the temporary closing structure, waterproofness between the temporary closing structure and the bank body is reliably ensured.
　本発明によれば、水上の限られた空間で、大水深条件での潜水作業を行うことなく仮締切り構造体を組み立てられる浮体式仮締切り工の施工方法を提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the construction method of the floating type temporary crusher which can assemble a temporary shutoff structure in a limited space on water without performing a diving operation in deep water conditions can be provided.
仮締切り構造体１の概要を示す図であり、図１（ａ）は、仮締切り構造体１の正面図、図１（ｂ）は、図１（ａ）の矢印Ａの方向から見た図、図１（ｃ）は、図１（ｂ）の矢印Ｃの方向から見た図、図１（ｄ）は、図１（ａ）のＢ－Ｂ線断面図。FIG. 1A is a front view of the temporary closing structure 1, and FIG. 1B is a view seen from the direction of arrow A in FIG. 1A. 1 (c) is a view as seen from the direction of arrow C in FIG. 1 (b), and FIG. 1 (d) is a cross-sectional view taken along the line BB in FIG. 1 (a). 図２（ａ）～図２（ｄ）は、仮締切り構造体１の組み立て工程を示す図2 (a) to 2 (d) are diagrams showing an assembly process of the temporary closing structure 1 連結構造１１および止水構造１３の詳細を示す図であり、図３（ａ）はブロックの連結前の状態を示す図、図３（ｂ）はブロックの連結後の状態を示す図。It is a figure which shows the detail of the connection structure 11 and the water stop structure 13, FIG. 3 (a) is a figure which shows the state before connection of a block, FIG.3 (b) is a figure which shows the state after connection of a block. 図４（ａ）は、ゴムガスケット２１の断面図、図４（ｂ）は、ゴムガスケット２１の立面図。FIG. 4A is a cross-sectional view of the rubber gasket 21, and FIG. 4B is an elevation view of the rubber gasket 21. ゴムガスケット２１の取付け方法を示す図であり、図５（ａ）は、ゴムガスケット２１の位置合わせをする工程を示す図、図５（ｂ）は、図５（ａ）のＨ－Ｈ線断面図、図５（ｃ）は、ゴムガスケット２１を取り付けた状態を示す図、図５（ｄ）は、図５（ｃ）のＩ－Ｉ線断面図、図５（ｅ）は、図１（ｄ）に示す範囲Ｇの拡大図。FIG. 5A is a view showing a step of aligning the rubber gasket 21. FIG. 5B is a cross-sectional view taken along the line HH of FIG. 5A. 5 (c) shows a state in which the rubber gasket 21 is attached, FIG. 5 (d) is a cross-sectional view taken along the line II of FIG. 5 (c), and FIG. 5 (e) is FIG. The enlarged view of the range G shown to d). 仮締切り構造２の概要を示す図であり、図６（ａ）は、仮締切り構造２の立面図、図６（ｂ）は、仮締切り構造２の側面図、図６（ｃ）は、仮締切り構造２の水平断面図。6 (a) is an elevation view of the temporary closing structure 2, FIG. 6 (b) is a side view of the temporary closing structure 2, and FIG. 6 (c) is a view showing an outline of the temporary closing structure 2. FIG. 2 is a horizontal sectional view of a temporary shutoff structure 2; 仮締切り構造２の詳細を示す図であり、図７（ａ）は、図６（ａ）に示す範囲Ｊの拡大図、図７（ｂ）は、図６（ｂ）に示す範囲Ｋの拡大図、図７（ｃ）は、図６（ｃ）に示す範囲Ｍの拡大図。FIG. 7 (a) is an enlarged view of the range J shown in FIG. 6 (a), and FIG. 7 (b) is an enlarged view of the range K shown in FIG. 6 (b). Fig. 7 (c) is an enlarged view of a range M shown in Fig. 6 (c). 従来の浮体式工法による仮締切り構造体１０１の設置方法を示す図であり、図８（ａ）は、従来の仮締切り構造体１０１を曳航する工程を示す図、図８（ｂ）は、従来の仮締切り構造体１０１を略垂直の状態にする工程を示す図、図８（ｃ）は、従来の仮締切り構造体１０１を堤体１０３に設置する工程を示す図。It is a figure which shows the installation method of the temporary closing structure 101 by the conventional floating type construction method, FIG. 8 (a) is a figure which shows the process of towing the conventional temporary closing structure 101, FIG.8 (b) is the conventional FIG. 8C is a view showing a step of installing the conventional temporary closing structure 101 on the levee 103, showing a step of making the temporary closing structure 101 of the second embodiment substantially vertical.
　以下、図面に基づいて、本発明の実施の形態について詳細に説明する。図１は、仮締切り構造体１の概要を示す図である。図１（ａ）は、仮締切り構造体１の正面図である。図１（ｂ）は、仮締切り構造体１の側面図である。図１（ｂ）は、図１（ａ）に示す矢印Ａの方向から見た図である。図１（ｃ）は、仮締切り構造体１の背面図である。図１（ｃ）は、図１（ｂ）に示す矢印Ｃの方向から見た図である。図１（ｄ）は、仮締切り構造体１を構成するブロック３の水平断面図である。図１（ｄ）は、図１（ａ）に示す矢印Ｂ－Ｂによる断面図である。 Hereinafter, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a view showing an outline of a temporary closing structure 1. FIG. 1A is a front view of the temporary closing structure 1. FIG. 1 (b) is a side view of the temporary closing structure 1. FIG. 1 (b) is a view seen from the direction of arrow A shown in FIG. 1 (a). FIG. 1 (c) is a rear view of the temporary closing structure 1. FIG. 1 (c) is a view seen from the direction of arrow C shown in FIG. 1 (b). FIG. 1D is a horizontal cross-sectional view of the block 3 constituting the temporary closing structure 1. FIG. 1 (d) is a cross-sectional view along arrow BB shown in FIG. 1 (a).
　図１（ａ）、図１（ｂ）に示すように、仮締切り構造体１は、底部５、側壁部７、可動蓋６等で構成される。側壁部７は、上下に積み重ねられた複数のブロック３からなる。下段のブロック３と上段のブロック３との突合せ部分には、止水構造１３が形成される。止水構造１３の詳細については後述する。また、下段のブロック３と上段のブロック３とは、水平方向の所定量の移動を許容するように連結する連結構造１１によって連結される。連結構造１１の詳細については後述する。 As shown in FIGS. 1 (a) and 1 (b), the temporary closing structure 1 includes a bottom 5, a side wall 7, a movable lid 6, and the like. The side wall 7 comprises a plurality of blocks 3 stacked one on top of the other. A water blocking structure 13 is formed at the abutment portion between the lower block 3 and the upper block 3. Details of the water blocking structure 13 will be described later. Further, the lower block 3 and the upper block 3 are connected by a connecting structure 11 which is connected to allow movement of a predetermined amount in the horizontal direction. Details of the connection structure 11 will be described later.
　図１（ｄ）に示すように、仮締切り構造体１は、一部の側面が開放された形状である。仮締切り構造体１を構成するブロック３は、内部に複数の仕切り２５が設けられる。ブロック３の内部は、仕切り２５によって、複数の空間２３に分割される。 As shown in FIG. 1D, the temporary closing structure 1 has a shape in which a part of the side surface is opened. The block 3 which comprises the temporary closing structure 1 is provided with the some partition 25 inside. The interior of block 3 is divided by partitions 25 into a plurality of spaces 23.
　図１（ａ）、図１（ｂ）に示すように、仮締切り構造体１を構成するブロック３のうち、下段の所定の段数のブロック３には、注排水バルブ９が設けられる。注排水バルブ９は、ブロック３の空間２３毎に配置される。 As shown in FIG. 1 (a) and FIG. 1 (b), among the blocks 3 constituting the temporary shutoff structure 1, a water supply and drainage valve 9 is provided in the block 3 of the predetermined number of stages in the lower stage. The pouring and draining valve 9 is disposed in each space 23 of the block 3.
　図１（ａ）、図１（ｂ）に示すように、可動蓋６は、仮締切り構造体１の天端１８に設けられる。可動蓋６は、天端１８の端部１７付近に回転支持部が配置される。可動蓋６はフラップ式の蓋であり、矢印Ｅに示すように開閉する。 As shown in FIGS. 1A and 1B, the movable lid 6 is provided at the top end 18 of the temporary closing structure 1. The movable cover 6 has a rotational support near the end 17 of the top end 18. The movable lid 6 is a flap type lid and opens and closes as indicated by an arrow E.
　図１（ｃ）、図１（ｄ）に示すように、仮締切り構造体１の、堤体の壁面と対向する部分である端部１７には、木材１９とＵ字状のゴムガスケット２１とからなる止水構造１５が形成される。止水構造１５の詳細については後述する。 As shown in FIG. 1 (c) and FIG. 1 (d), the end portion 17 of the temporary closing structure 1, which is a portion facing the wall surface of the levee, includes a wood 19 and a U-shaped rubber gasket 21. A water blocking structure 15 is formed. Details of the water blocking structure 15 will be described later.
　図２は、仮締切り構造体１の組み立て方法を示す図である。図１に示す仮締切り構造体１は、図２に示すように、例えば、水面３７に浮かんだ台船２７、台船２９の間にて組み立てられる。台船２７上には、チェーンブロック３３を有する構造体支持架台３１が設置される。台船２９上には、クローラクレーン３５が設置される。 FIG. 2 is a view showing a method of assembling the temporary closing structure 1. The temporary shutoff structure 1 shown in FIG. 1 is assembled, for example, between a barge 27 and a barge 29 floating on a water surface 37, as shown in FIG. On the barge 27, a structure support rack 31 having a chain block 33 is installed. A crawler crane 35 is installed on the base ship 29.
　仮締切り構造体１を組み立てるには、まず、底部５を水面３７上に浮遊させた状態で、底部５の上方に最下段のブロック３－１を連結し、所定の深度まで沈下させる。その後、下段のブロック３の上方に上段のブロック３を連結して所定の深度まで沈下させる作業を、ｎ段のブロック３の連結終了まで複数回繰り返す。 In order to assemble the temporary closing structure 1, first, with the bottom 5 floating on the water surface 37, the lowermost block 3-1 is connected above the bottom 5 and is sunk to a predetermined depth. Thereafter, the operation of connecting the upper block 3 above the lower block 3 and sinking the block 3 to a predetermined depth is repeated a plurality of times until the connection of the n stages of the blocks 3 is completed.
　図２（ａ）から図２（ｃ）は、ブロック３－３にブロック３－４を連結する工程を示す。以下に、図２（ａ）から図２（ｃ）を用い、ブロック３－３とブロック３－４とを例として、ブロック３同士の連結方法について説明する。図２（ａ）に示す工程では、チェーンブロック３３で吊り下げた下段のブロック３－３の上方に、クローラクレーン３５を用いて上段のブロック３－４を吊り下げる。そして、下段のブロック３－３と上段のブロック３－４とを、連結構造１１（図１）により連結する。下段のブロック３－３と上段のブロック３－４との間は、止水構造１３（図１）により止水される。 FIG. 2 (a) to FIG. 2 (c) show the process of connecting block 3-4 to block 3-3. Hereinafter, a method of connecting the blocks 3 will be described with reference to FIGS. 2A to 2C and taking the blocks 3-3 and 3-4 as examples. In the process shown in FIG. 2A, the upper block 3-4 is suspended using the crawler crane 35 above the lower block 3-3 suspended by the chain block 33. Then, the lower block 3-3 and the upper block 3-4 are connected by the connecting structure 11 (FIG. 1). The water blocking structure 13 (FIG. 1) shuts off between the lower block 3-3 and the upper block 3-4.
　図２（ａ）に示す工程で下段のブロック３－３と上段のブロック３－４とを連結した後、図２（ｂ）に示す工程では、チェーンブロック３３とクローラクレーン３５とを同時に巻き下げる。そして、組立中の仮締切り構造体１を所定の深度（バラスト水重量を含む自重と浮力とが吊り合う位置）まで沈下させる。 After connecting the lower block 3-3 and the upper block 3-4 in the process shown in FIG. 2A, in the process shown in FIG. 2B, the chain block 33 and the crawler crane 35 are simultaneously lowered. . Then, the temporary closing structure 1 being assembled is sunk to a predetermined depth (a position where the self weight including the ballast water weight and the buoyancy are suspended).
　図２（ｃ）に示す工程では、下方のブロック３－１、３－２…内の所定の空間２３（図１（ｄ））に、注排水バルブ９を介してバラスト水を注入し、チェーンブロック３３とクローラクレーン３５とを同時に巻き下げる。そして、組立中の仮締切り構造体１を所定の深度（バラスト水重量を含む自重と浮力とが吊り合う位置）まで沈下させ、チェーンブロック３３をブロック３－３からブロック３－４に付け替える。 In the step shown in FIG. 2 (c), ballast water is injected into the predetermined space 23 (FIG. 1 (d)) in the lower blocks 3-1, 3-2. The block 33 and the crawler crane 35 are simultaneously lowered. Then, the temporary closing structure 1 being assembled is sunk to a predetermined depth (a position where the self weight including the ballast water weight and the buoyancy are suspended), and the chain block 33 is changed from the block 3-3 to the block 3-4.
　図３は、連結構造１１および止水構造１３の詳細を示す図である。以下に、図３を用いて、下段のブロック３と上段のブロック３を連結する連結構造１１、下段のブロック３と上段のブロック３との間の止水構造１３について説明する。 FIG. 3 is a view showing the details of the connection structure 11 and the water stop structure 13. Below, the connection structure 11 which connects the lower block 3 and the upper block 3 and the water blocking structure 13 between the lower block 3 and the upper block 3 will be described with reference to FIG.
　図３（ａ）は、上段のブロック３と下段のブロック３との突合せ部分の連結前の状態を示す図である。図３（ａ）に示すように、上段のブロック３は、仮締切り構造体１の外側の側面４３ａおよび内側の側面４３ｂの、下面４５ａから所定の距離３９ａをおいた上方に、連結金物４１ａが固定される。また、下段のブロック３は、上面４５ｂから所定の距離３９ｂをおいた下方に、連結金物４１ｂが固定される。連結金物４１ａ、４１ｂは、水平方向の連結板４２ａと垂直方向のリブ４２ｂとからなる。 FIG. 3 (a) is a view showing a state before the connection of the butt portions of the upper block 3 and the lower block 3. As shown in FIG. As shown in FIG. 3 (a), the upper block 3 is formed by connecting metal 41a on the outer side 43a and the inner side 43b of the temporary closing structure 1 at a predetermined distance 39a from the lower surface 45a. It is fixed. Further, in the lower block 3, the connection metal 41 b is fixed to the lower side at a predetermined distance 39 b from the upper surface 45 b. The connecting hardware 41a, 41b comprises a horizontal connecting plate 42a and a vertical rib 42b.
　図３（ａ）に示すように、上段のブロック３と下段のブロック３は、下面４５ａ、上面４５ｂに、それぞれ支圧板４７が設けられる。上段のブロック３は、仮締切り構造体１の外側の側面４３ａの下縁部の全長に、断面がＰ型の水密ゴム４９が設けられる。水密ゴム４９は、上段のブロック３の下面４５ａからＰ型の円形部分が少量だけ突出するように配置される。下段のブロック３は、側面４３ａの上縁部の全長に、ゴム当たり部５１が設けられる。 As shown in FIG. 3A, a bearing plate 47 is provided on the lower surface 45a and the upper surface 45b of the upper block 3 and the lower block 3, respectively. The upper block 3 is provided with a water-tight rubber 49 having a P-type cross section on the entire length of the lower edge of the outer side surface 43 a of the temporary closing structure 1. The watertight rubber 49 is arranged such that the circular portion of the P-type protrudes by a small amount from the lower surface 45a of the block 3 in the upper stage. The lower block 3 is provided with a rubber contact portion 51 on the entire length of the upper edge of the side surface 43a.
　図３（ｂ）は、上段のブロック３と下段のブロック３との突合せ部分の連結後の状態を示す図である。図３（ｂ）に示すように、連結構造１１は、下段のブロック３に設けられた第１の連結金物４１ｂと上段のブロック３に設けられた第２の連結金物４１ａとにボルト５３を挿通し、ボルト５３を連結板４２ａの位置で固定して形成される。連結構造１１では、第１の連結金物４１ｂと第２の連結金物４１ａとが所定の間隔をおいて配置され、ボルト５３が、第１の連結金物４１ｂと第２の連結金物４１ａとの間で変形可能である。これにより、下段のブロック３と上段のブロック３とは、互いに水平方向の所定量の移動が許容される。 FIG. 3 (b) is a view showing a state after connection of the butt parts of the block 3 in the upper stage and the block 3 in the lower stage. As shown in FIG. 3 (b), the connecting structure 11 passes the bolt 53 through the first connecting metal 41b provided in the lower block 3 and the second connecting metal 41a provided in the upper block 3 And the bolt 53 is fixed at the position of the connecting plate 42a. In the connecting structure 11, the first connecting metal 41b and the second connecting metal 41a are arranged at a predetermined distance, and the bolt 53 is between the first connecting metal 41b and the second connecting metal 41a. It is deformable. As a result, the lower block 3 and the upper block 3 are allowed to move by a predetermined amount in the horizontal direction.
　図３（ｂ）に示すように、止水構造１３は、Ｐ型の水密ゴム４９の円形部分をゴム当たり部５１に変形させつつ接触させて形成される。上段のブロック３の下面４５ａの支圧板４７と、下段のブロック３の上面４５ｂの支圧板４７とは、接触する。 As shown in FIG. 3 (b), the water blocking structure 13 is formed by bringing a circular portion of the P-type watertight rubber 49 into contact with the rubber contact portion 51 while deforming it. The bearing plate 47 of the lower surface 45 a of the upper block 3 and the bearing plate 47 of the upper surface 45 b of the lower block 3 are in contact with each other.
　図２（ｄ）は、ブロック３の連結作業を終えた仮締切り構造体１に、ゴムガスケット２１を取り付ける工程を示す図である。図４は、ゴムガスケット２１の概要を示す図、図５は、ゴムガスケット２１の取付け方法を示す図である。以下に、図２（ｄ）、図４、図５を用いて、ゴムガスケット２１の概要および仮締切り構造体１への取付け方法について説明する。 FIG. 2D is a view showing a process of attaching the rubber gasket 21 to the temporary closing structure 1 after the connection work of the blocks 3 is completed. FIG. 4 is a view showing an outline of the rubber gasket 21, and FIG. 5 is a view showing a method of attaching the rubber gasket 21. As shown in FIG. The outline of the rubber gasket 21 and the method of attaching it to the temporary shut-off structure 1 will be described below with reference to FIGS. 2 (d), 4 and 5. FIG.
　図４（ａ）は、ゴムガスケット２１の断面図、図４（ｂ）は、ゴムガスケット２１の立面図である。図４（ａ）は、図４（ｂ）に示す矢印Ｆ－Ｆによる断面図である。図４（ｂ）に示すように、ゴムガスケット２１は、Ｕ字型である。図４（ａ）に示すように、ゴムガスケット２１は、本体２１ａ、固定部２１ｂからなる。本体２１ａは、上面の中央に１条のノーズ２１ｃを有する。本体２１ａの圧縮量５７は、ノーズ２１ｃのノーズ高５５+αであり、５０～６０ｍｍ程度が望ましい。固定部２１ｂは、本体２１ａの下面から両側部方向に突出して設けられる。固定部２１ｂは、孔５９を有する。 FIG. 4A is a cross-sectional view of the rubber gasket 21, and FIG. 4B is an elevation view of the rubber gasket 21. FIG. 4 (a) is a cross-sectional view taken along the arrow FF shown in FIG. 4 (b). As shown in FIG. 4 (b), the rubber gasket 21 is U-shaped. As shown to Fig.4 (a), the rubber gasket 21 consists of the main body 21a and the fixing | fixed part 21b. The main body 21a has a single nose 21c at the center of the upper surface. The compression amount 57 of the main body 21a is the nose height 55 + α of the nose 21c, and desirably about 50 to 60 mm. The fixing portion 21 b is provided so as to protrude in the direction of both sides from the lower surface of the main body 21 a. The fixing portion 21 b has a hole 59.
　図５（ａ）および図５（ｂ）は、ゴムガスケット２１の位置合わせをする工程を示す。図５（ｂ）は、図５（ａ）に示す矢印Ｈ－Ｈによる断面図である。図５（ｃ）から図５（ｅ）は、ゴムガスケット２１を取り付けた状態を示す図である。図５（ｄ）は、図５（ｃ）に示す矢印Ｉ－Ｉによる断面図である。図５（ｅ）は、図１（ｄ）に示す範囲Ｇの拡大図である。 5 (a) and 5 (b) show the process of aligning the rubber gasket 21. FIG. FIG. 5 (b) is a cross-sectional view taken along arrows HH shown in FIG. 5 (a). 5 (c) to 5 (e) are views showing a state in which the rubber gasket 21 is attached. FIG. 5 (d) is a cross-sectional view taken along arrow II shown in FIG. 5 (c). FIG.5 (e) is an enlarged view of the range G shown in FIG.1 (d).
　仮締切り構造体１を組み立てる際には、図２（ａ）から図２（ｃ）を例として説明した方法で全てのブロック３を連結して側壁部７を形成した後、図２（ｄ）に示すように、クローラクレーン３５を用いてゴムガスケット２１を水中に吊り下げる。ゴムガスケット２１は、仮締切り構造体１の端部１７側に吊り下げられる。ゴムガスケット２１の下端には、ゴムガスケット２１の形状および姿勢を維持するために、バランスウェイト９１を取り付けることが望ましい。 When assembling the temporary closing structure 1, after forming all the side walls 7 by connecting all the blocks 3 by the method described with FIG. 2 (a) to FIG. 2 (c) as an example, FIG. 2 (d) The rubber gasket 21 is suspended in water using a crawler crane 35 as shown in FIG. The rubber gasket 21 is suspended on the end 17 side of the temporary closing structure 1. It is desirable to attach a balance weight 91 to the lower end of the rubber gasket 21 in order to maintain the shape and posture of the rubber gasket 21.
　前述したように、仮締切り構造体１の端部１７には、木材１９が配置される。図５（ａ）に示すように、木材１９は、各ブロック３の端部１７の両側部に配置される。木材１９同士の間には、長ボルト６１が配置される。また、図５（ｂ）に示すように、短ボルト６３も配置される。長ボルト６１および短ボルト６３は、ブロック３に固定される。 As described above, the wood 19 is disposed at the end 17 of the temporary closing structure 1. As shown in FIG. 5A, the wood 19 is disposed on both sides of the end 17 of each block 3. Long bolts 61 are disposed between the woods 19. Further, as shown in FIG. 5 (b), short bolts 63 are also arranged. The long bolt 61 and the short bolt 63 are fixed to the block 3.
　図２（ｄ）に示すように水中に吊り下げたゴムガスケット２１は、図５（ａ）、図５（ｂ）に示すように、孔５９が長ボルト６１の先端に重なるように位置合わせする。そして、長ボルト６１を孔５９に挿入し、図５（ｃ）に示すように、ゴムガスケット２１を各ブロック３の木材１９同士の間に取り付ける。木材１９は、ゴムガスケット２１よりも厚さが薄いものとする。ゴムガスケット２１の孔５９にブロック３の長ボルト６１を挿入すると、図５（ｄ）、図５（ｅ）に示すように、ゴムガスケット２１の残りの孔とブロック３の短ボルト６３との位置合わせおよび残りの孔への短ボルト６３の挿入が同時に行われる。これにより、仮締切り構造体１にゴムガスケット２１を容易に取り付けることができる。 The rubber gasket 21 suspended in water as shown in FIG. 2 (d) is positioned so that the hole 59 overlaps the tip of the long bolt 61, as shown in FIGS. 5 (a) and 5 (b). . Then, the long bolt 61 is inserted into the hole 59, and as shown in FIG. 5C, the rubber gasket 21 is attached between the woods 19 of each block 3. The wood 19 is thinner than the rubber gasket 21. When the long bolt 61 of the block 3 is inserted into the hole 59 of the rubber gasket 21, as shown in FIGS. 5 (d) and 5 (e), the positions of the remaining holes of the rubber gasket 21 and the short bolts 63 of the block 3 are obtained. The fitting and the insertion of the short bolts 63 into the remaining holes take place simultaneously. Thereby, the rubber gasket 21 can be easily attached to the temporary closing structure 1.
　図６は、仮締切り構造２の概要を示す図である。図６（ａ）は、仮締切り構造２の立面図、図６（ｂ）は、仮締切り構造２の側面図、図６（ｃ）は、仮締切り構造２の水平断面図である。図６（ｃ）は、図６（ｂ）に示す矢印Ｌ－Ｌによる断面図である。 FIG. 6 is a view showing an outline of the temporary shutoff structure 2. 6 (a) is an elevation view of the temporary closing structure 2, FIG. 6 (b) is a side view of the temporary closing structure 2, and FIG. 6 (c) is a horizontal sectional view of the temporary closing structure 2. FIG. 6 (c) is a cross-sectional view taken along arrow L--L shown in FIG. 6 (b).
　図７は、仮締切り構造２の詳細を示す図である。図７（ａ）は、浮き上がり防止機構６５の正面図である。図７（ａ）は、図６（ａ）に示す範囲Ｊの拡大図である。図７（ｂ）は、浮き上がり防止機構６５の側面図である。図７（ｂ）は、図６（ｂ）に示す範囲Ｋの拡大図である。図７（ｃ）は、ストッパ８５付近の水平断面図である。図７（ｃ）は、図６（ｃ）に示す範囲Ｍの拡大図である。 FIG. 7 is a view showing the details of the temporary shutoff structure 2. FIG. 7A is a front view of the uplift prevention mechanism 65. FIG. Fig.7 (a) is an enlarged view of the range J shown to Fig.6 (a). FIG. 7 (b) is a side view of the uplifting prevention mechanism 65. FIG. 7 (b) is an enlarged view of the range K shown in FIG. 6 (b). FIG. 7C is a horizontal sectional view around the stopper 85. As shown in FIG. FIG.7 (c) is an enlarged view of the range M shown in FIG.6 (c).
　仮締切り構造２は、堤体６９に仮締切り構造体１を設置した後、仮締切り構造体１と堤体６９の壁面６８とに囲まれた内部８９を排水して形成される。図６に示すように、仮締切り構造２では、堤体６９の壁面６８に戸当たり６７が額縁状に設置されている。戸当たり６７は、図７（ｃ）に示すように、アンカ金物８７ａ、アンカ金物８７ｂを用いて堤体６９の壁面６８に固定される。なお、堤体６９の壁面６８への戸当たり６７の設置は、仮締切り構造体１の組み立てと並行して行うのが望ましい。 The temporary closing structure 2 is formed by draining the inside 89 surrounded by the temporary closing structure 1 and the wall surface 68 of the bank 69 after the temporary closing structure 1 is installed in the bank 69. As shown in FIG. 6, in the temporary closing structure 2, a door stop 67 is installed in a frame shape on the wall surface 68 of the dam 69. The door stop 67 is fixed to the wall surface 68 of the dam 69 by using the anchor metal 87a and the anchor metal 87b, as shown in FIG. 7 (c). In addition, it is desirable to perform the installation of the door stop 67 on the wall surface 68 of the dam body 69 in parallel with the assembly of the temporary closing structure 1.
　堤体６９に仮締切り構造体１を設置するには、図２に示す各工程により組み立てた仮締切り構造体１を、起立した状態で浮遊させて、堤体６９の設置予定位置付近まで曳航する。そして、図６（ｂ）に示すように、仮締切り構造体１の端部１７を、堤体６９の壁面６８の戸当たり６７に合わせて配置する。図６（ａ）、図６（ｂ）に示すように、仮締切り構造体１の天端１８と堤体６９の壁面６８との間には、浮き上がり防止機構６５を設置する。図６（ｃ）に示すように、仮締切り構造体１の側壁部７と堤体６９の壁面６８との間には、ストッパ８５を設置する。 In order to install the temporary closing structure 1 on the levee 69, the temporary closing structure 1 assembled in each process shown in FIG. 2 is floated in a standing state, and is towed near the planned installation position of the dam 69. . And as shown in FIG.6 (b), the edge part 17 of the temporary closing structure 1 is arrange | positioned according to the door stop 67 of the wall surface 68 of the dam body 69. As shown in FIG. As shown in FIGS. 6 (a) and 6 (b), an anti-lifting mechanism 65 is installed between the top end 18 of the temporary closing structure 1 and the wall surface 68 of the dam 69. As shown in FIG. 6 (c), a stopper 85 is installed between the side wall 7 of the temporary closing structure 1 and the wall surface 68 of the dam 69.
　図７（ａ）、図７（ｂ）に示すように、浮き上がり防止機構６５は、浮上り防止アンカ７３、沓部７１、摺動板７７、吊下げロッド７５等で形成される。浮上り防止アンカ７３は、格子状の補強材８３を有する板状部材である。浮上り防止アンカ７３は、アンカボルト７９によって堤体６９の壁面６８に固定される。沓部７１は、浮上り防止アンカ７３の下端面８１と仮締切り構造体１の天端１８との間に配置される。沓部７１は、堤体６９の壁面６８に沿って配置され、壁面６８からの沓部７１の形成長さ７６は、壁面６８から仮締切り構造体１の浮心７８までの長さ８０（図６（ｂ））よりも短いものとする。摺動板７７は、沓部７１と仮締切り構造体１の天端１８との間に設けられる。沓部７１は、摺動板７７を介して仮締切り構造体１の天端１８に接触していればよく、天端１８に連結する必要はない。吊下げロッド７５は、仮締切り構造体１の天端１８と浮上り防止アンカ７３とを連結する。吊下げロッド７５の浮上り防止アンカ７３側の端部は、例えば、補強材８３に連結される。 As shown in FIGS. 7A and 7B, the floating preventing mechanism 65 is formed by the floating preventing anchor 73, the flange portion 71, the sliding plate 77, the hanging rod 75, and the like. The anti-lifting anchor 73 is a plate-like member having a grid-like reinforcing material 83. The anti-lifting anchor 73 is fixed to the wall surface 68 of the dam 69 by an anchor bolt 79. The flange portion 71 is disposed between the lower end surface 81 of the anti-lifting anchor 73 and the top end 18 of the temporary closing structure 1. The ridge portion 71 is disposed along the wall surface 68 of the dam 69, and the formation length 76 of the ridge portion 71 from the wall surface 68 is a length 80 from the wall surface 68 to the floating core 78 of the temporary closing structure 1 (see FIG. It shall be shorter than 6 (b). The sliding plate 77 is provided between the flange portion 71 and the top end 18 of the temporary closing structure 1. The ridge portion 71 may be in contact with the top end 18 of the temporary closing structure 1 via the sliding plate 77, and does not have to be connected to the top end 18. The hanging rod 75 connects the top end 18 of the temporary closing structure 1 and the anti-lifting anchor 73. The end of the suspension rod 75 on the side of the anti-lifting anchor 73 is connected to, for example, the reinforcing member 83.
　浮き上がり防止機構６５では、沓部７１が、仮締切り構造体１の浮力を支持し、浮き上がりを防止する。上述したように、沓部７１の形成長さ７６は壁面６８から仮締切り構造体１の浮心７８までの長さ８０よりも短い。これにより仮締切り構造体１に生じる回転モーメントは水圧によって打ち消されるため、仮締切り構造体１が浮き上がる（壁体から離れる）ことはない。摺動板７７は、仮締切り構造体１の最上段のブロック３の水平移動を可能とする。吊下げロッド７５は、異常に水位が下がった場合に、仮締切り構造体１の沈下を防止する。 In the lifting prevention mechanism 65, the brim portion 71 supports the buoyancy of the temporary closing structure 1, and prevents lifting. As described above, the formation length 76 of the flange portion 71 is shorter than the length 80 from the wall surface 68 to the floating core 78 of the temporary closing structure 1. As a result, the rotational moment generated in the temporary closing structure 1 is canceled out by the water pressure, so the temporary closing structure 1 does not lift up (is separated from the wall). The sliding plate 77 enables horizontal movement of the uppermost block 3 of the temporary closing structure 1. The suspension rod 75 prevents the temporary closing structure 1 from sinking when the water level drops abnormally.
　図７（ｃ）に示すように、ストッパ８５は、一端が、仮締切り構造体１の側壁部７の内側の側面４３ａに連結される。ストッパ８５は、他端が、戸当たり６７のアンカ金物８７ａに連結される。ストッパ８５は、地震動等によって仮締切り構造体１が堤体６９から離れるのを防ぐ。 As shown in FIG. 7C, one end of the stopper 85 is connected to the inner side surface 43 a of the side wall 7 of the temporary closing structure 1. The stopper 85 is connected at the other end to the anchor metal 87 a of the door stop 67. The stopper 85 prevents the temporary closing structure 1 from separating from the levee body 69 by earthquake motion or the like.
　仮締切り構造体１を堤体６９の壁面６８に設置すると、図７（ｃ）に示すように、木材１９および木材１９と同等程度の厚さに圧縮変形したゴムガスケット２１が戸当たり６７に接触して止水構造１５が形成される。止水構造１５では、木材１９が、戸当たり６７との間の摩擦によって、仮締切り構造体１の位置ずれを防止する。また、ゴムガスケット２１が仮締切り構造体１の内部と外部との間の水の移動を防止する。 When the temporary closing structure 1 is installed on the wall surface 68 of the dam 69, as shown in FIG. 7C, the rubber gasket 21 compressed and deformed to a thickness comparable to that of the wood 19 and 19 makes contact with the door contact 67. Thus, the water blocking structure 15 is formed. In the water blocking structure 15, the wood 19 prevents positional deviation of the temporary closing structure 1 by friction with the door stop 67. Further, the rubber gasket 21 prevents the movement of water between the inside and the outside of the temporary closing structure 1.
　仮締切り構造２では、図６、図７に示すように仮締切り構造体１を堤体６９の壁面６８に設置した後、可動蓋６を天端１８に設置する。そして、仮締切り構造体１と堤体６９の壁面６８とに囲まれた内部８９を排水して、仮締切りを完了する。 In the temporary closing structure 2, as shown in FIGS. 6 and 7, after the temporary closing structure 1 is installed on the wall surface 68 of the dam 69, the movable cover 6 is installed on the top end 18. Then, the inside 89 surrounded by the temporary closing structure 1 and the wall surface 68 of the dam 69 is drained to complete the temporary closing.
　このように、本実施の形態では、下段のブロック３の上方に上段のブロック３を連結して所定の深度まで沈下させる作業を複数回繰り返して形成した仮締切り構造体１を、起立した状態で浮遊させて曳航し、堤体６９の壁面６８に設置する。これにより、水上の限られた空間で、大水深条件での潜水作業を行うことなく仮締切り構造体１を組み立て、仮締切り構造２を形成することができる。 As described above, in the present embodiment, the temporary closing structure 1 formed by repeating the operation of connecting the upper block 3 above the lower block 3 and sinking to a predetermined depth a plurality of times is erected. It floats and is towed and installed on the wall 68 of the dam 69. Thereby, temporary closing structure 1 can be assembled in a limited space on water without performing diving work under deep water conditions, and temporary closing structure 2 can be formed.
　仮締切り構造体１では、堤体６９の壁面６８と対向する端部１７に、止水部材として、端部１７に合わせたＵ字形状であり所定の圧縮代を有するゴムガスケット２１が設置される。戸当たり６７に不陸がある場合でも、ゴムガスケット２１を不陸に追従させつつ圧縮変形させることにより、仮締切り構造体１の端部１７と戸当たり６７との間の止水構造１５を確実なものとできる。 In the temporary closing structure 1, a rubber gasket 21 having a predetermined compression margin is installed at the end 17 opposed to the wall surface 68 of the dam 69, as a water blocking member, according to the end 17 and having a U shape. . Even when there is a gap in the door stop 67, the water gasket 15 between the end 17 of the temporary shut-off structure 1 and the door lock 67 can be assured by compressing and deforming the rubber gasket 21 while following the gap. It can be
　仮締切り構造体１では、下段のブロック３と上段のブロック３との突合せ部分を、水平方向の所定量の移動が許容される連結構造１１で連結する。そのため、戸当たり６７に不陸がある場合でも、各ブロック３を独立して水平移動させて、木材１９およびゴムガスケット２１を戸当たり６７に接触させることができる。 In the temporary closing structure 1, butting portions of the lower block 3 and the upper block 3 are connected by a connecting structure 11 which allows a predetermined amount of movement in the horizontal direction. Therefore, even when the door stop 67 is not landed, each block 3 can be moved horizontally independently, and the wood 19 and the rubber gasket 21 can be brought into contact with the door stop 67.
　仮締切り構造体１では、下段のブロック３と上段のブロック３との突合せ部分に、上段のブロック３の下縁に沿って設けられた水密ゴム４９と下段のブロック３の上縁に沿って設けられたゴム当たり部５１とを、水密ゴム４９を変形させつつ接触させた止水構造１３が設けられる。これにより、下段のブロック３と上段のブロック３との突合せ部分の止水性が確実に確保される。 In the temporary closing structure 1, the watertight rubber 49 provided along the lower edge of the upper block 3 and the upper edge of the lower block 3 are provided at the abutment portion between the lower block 3 and the upper block 3 A water blocking structure 13 is provided, in which the rubber contact portion 51 is brought into contact with the watertight rubber 49 while being deformed. Thereby, the waterproofness of the butt portion of the lower block 3 and the upper block 3 is reliably ensured.
　仮締切り構造体１では、天端１８にフラップ式の可動蓋６を設ける。これにより、異常出水によるダム水位上昇に備えることができる。 In the temporary closing structure 1, a flap type movable lid 6 is provided at the top end 18. In this way, it is possible to prepare for rising of the dam water level due to abnormal water discharge.
　仮締切り構造２では、浮き上がり防止機構６５を設置することにより、浮き上がり防止機構６５の沓部７１で、水位上昇時に仮締切り構造体１の浮き上がりを防止することができる。摺動板７７は、仮締切り構造体１の最上段のブロック３の水平移動を可能とする。吊下げロッド７５は、水位下降時に仮締切り構造体１の沈下を防止することができる。 In the temporary closing structure 2, by installing the floating prevention mechanism 65, floating of the temporary closing structure 1 can be prevented at the time of rising of the water level by the flange portion 71 of the floating prevention mechanism 65. The sliding plate 77 enables horizontal movement of the uppermost block 3 of the temporary closing structure 1. The suspension rod 75 can prevent the temporary closing structure 1 from sinking when the water level is lowered.
　なお、仮締切り構造体１の水平断面形状は、図１（ｄ）に示したものに限らない。仮締切り構造体１は、底部および複数のブロックからなる側壁部により構成され、一部の側面が開放されたものであればよい。また、止水構造１５のゴムガスケット２１の両側部には、木材１９でなく、鋼材を配置してもよい。吊下げ浮き上がり防止機構６５では、吊下げ部材として、吊下げロッド７５の代わりに吊下げロープを用いてもよい。 In addition, the horizontal cross-sectional shape of the temporary closing structure 1 is not restricted to what was shown in FIG.1 (d). The temporary closing structure 1 may be formed of a bottom portion and a side wall portion formed of a plurality of blocks, and it is sufficient that a part of the side surface is opened. In addition, not the wood 19 but steel may be disposed on both sides of the rubber gasket 21 of the water blocking structure 15. In the lifting and lifting prevention mechanism 65, a hanging rope may be used instead of the hanging rod 75 as a hanging member.
　以上、添付図を参照しながら、本発明の実施の形態を説明したが、本発明の技術的範囲は、前述した実施の形態に左右されない。当業者であれば、特許請求の範囲に記載された技術的思想の範疇内において各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。 Although the embodiments of the present invention have been described above with reference to the attached drawings, the technical scope of the present invention is not influenced by the above-described embodiments. It is apparent that those skilled in the art can conceive of various changes or modifications within the scope of the technical idea described in the claims, and they are naturally also within the technical scope of the present invention. It is understood that it belongs.
　１………仮締切り構造体
　２………仮締切り構造
　３………ブロック
　５………底部
　６………可動蓋
　７………側壁部
　９………注排水バルブ
　１１………連結構造
　１３、１５………止水構造
　１７………端部
　１８………天端
　１９………木材
　２１………ゴムガスケット
　２１ａ………本体
　２１ｂ………固定部
　２１ｃ………ノーズ
　２３………空間
　２５………仕切り
　２７、２９………台船
　３１………構造体支持架台
　３３………チェーンブロック
　３５………クローラチェーン
　３７………水面
　３９ａ、３９ｂ………距離
　４１ａ、４１ｂ………連結金物
　４２ａ………連結板
　４２ｂ………リブ
　４３ａ、４３ｂ………側面
　４５ａ………下面
　４５ｂ………上面
　４７………支圧板
　４９………水密ゴム
　５１………ゴム当たり部
　５３………ボルト
　５５………ノーズ高
　５７………圧縮量
　５９………孔
　６１………長ボルト
　６３………短ボルト
　６５………浮き上がり防止機構
　６７………戸当たり
　６８………壁面
　６９………堤体
　７１………沓部
　７３………浮き上がり防止アンカ
　７５………吊下げロッド
　７６………形成長さ
　７７………摺動板
　７８………浮心
　７９………アンカボルト
　８１………下端面
　８３………補強材
　８５………ストッパ
　８７ａ、８７ｂ………アンカ金物
　８９………内部
　９１………バランスウェイト DESCRIPTION OF SYMBOLS 1 ......... Temporary shutoff structure 2 ......... Temporary shutoff structure 3 ......... Block 5 ......... Bottom part 6 ......... Movable lid 7 ............ Side wall part 9 ......... Note discharge valve 11 ......... Connection structure 13, 15 ...... Water stopping structure 17 ...... 端 18 ...... 天 19 木材 wood 21 ... rubber gasket 21a ...... main body 21b 固定 fixing portion 21c ノ ー ズ nose 23 ノ ー ズ...... Space 25 ...... Partition 27 29, 29 ...... Base boat 31 ...... Structure support frame 33 ...... Chain block 35 ...... Crawler chain 37 ...... Water surface 39a, 39b ...... Distance 41a, 41b ...... Connection hardware 42a ...... Connection plate 42b ...... Rib 43a, 43b ...... Side surface 45a ...... Lower surface 45b ...... Top surface 47 ...... Support plate 49 ...... Watertight rubber 51 ...... Rubber contact part 53 ......... bolt 55 ... ... no Height 57 ......... Compression amount 59 ... ... Hole 61 ... ... Long bolt 63 ... ... Short bolt 65 ... ... Lifting prevention mechanism 67 ... ... Door contact 68 ... ... Wall surface 69 ... ... Wall 71 ··· · · · · · · · 73 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Lower end face 83 ......... Reinforcement material 85 ... ... Stopper 87a, 87b ......... Anchor hardware 89 ......... Interior 91 ......... Balance weight

Claims (6)

  1. 　底部および複数のブロックからなる側壁部により構成され一部の側面が開放された仮締切り構造体を用いた浮体式仮締切り工の施工方法であって、
    　底部を水面上に浮遊させた状態で、前記底部の上方に最下段のブロックを連結し、所定の深度まで沈下させる工程（ａ）と、
    　下段のブロックの上方に上段のブロックを連結して所定の深度まで沈下させる作業を複数回繰り返して仮締切り構造体を形成する工程（ｂ）と、
    　前記仮締切り構造体を、起立した状態で浮遊させて曳航し、堤体の壁面に設置する工程（ｃ）と、
    　前記仮締切り構造体と前記堤体の壁面とに囲まれた内部を排水する工程（ｄ）と、
    を具備することを特徴とする浮体式仮締切り工の施工方法。     It is a construction method of a floating type temporary crusher using a temporary crush structure which is constituted by a side wall part which consists of a bottom and a plurality of blocks, and a part of side surfaces are opened,
    Connecting the lowermost block above the bottom with the bottom floating on the water surface and sinking to a predetermined depth (a);
    Forming a temporary closing structure by repeating the operation of connecting the upper block above the lower block and sinking it to a predetermined depth a plurality of times;
    A step (c) of suspending the temporary closing structure in an upright state, towing it, and installing it on the wall surface of the levee,
    Draining the inside surrounded by the temporary closing structure and the wall surface of the bank body (d);
    The construction method of the floating type temporary cofferdam characterized by comprising.
  2. 　前記下段のブロックと前記上段のブロックとの突合せ部分に、
    　前記ブロック同士を、水平方向の所定量の移動を許容するように連結する連結構造が設けられることを特徴とする請求項１記載の浮体式仮締切り工の施工方法。     At the butt of the lower block and the upper block,
    2. The method according to claim 1, further comprising a connecting structure for connecting the blocks so as to allow movement of a predetermined amount in the horizontal direction.
  3. 　前記連結構造は、前記下段のブロックに設けられた第１の連結金物と前記上段のブロックに設けられた第２の連結金物とをボルトにより連結して形成され、
    　前記第１の連結金物と前記第２の連結金物が所定の間隔をおいて配置され、前記ボルトが、前記第１の連結金物と前記第２の連結金物との間で変形可能であることを特徴とする請求項２記載の浮体式仮締切り工の施工方法。     The connection structure is formed by connecting a first connection metal provided in the lower block and a second connection metal provided in the upper block by bolts.
    The first metal connection and the second metal connection are arranged at a predetermined distance, and the bolt is deformable between the first metal connection and the second metal connection The construction method of the floating temporary cofferdam according to claim 2 characterized by the above-mentioned.
  4. 　前記下段のブロックと前記上段のブロックとの突合せ部分に、
    　一方のブロックの縁に沿って設けられた水密ゴムと他方のブロックの縁に沿って設けられたゴム当たり部とを、前記水密ゴムを変形させつつ接触させて形成される止水構造が設けられることを特徴とする請求項１記載の浮体式仮締切り工の施工方法。     At the butt of the lower block and the upper block,
    A water blocking structure is provided which is formed by bringing a watertight rubber provided along the edge of one block and a rubber abutment provided along the edge of the other block while deforming the watertight rubber. The construction method of the floating type temporary cofferdam according to claim 1 characterized by things.
  5. 　前記仮締切り構造体の天端に、フラップ式の可動蓋が設けられることを特徴とする請求項１記載の浮体式仮締切り工の施工方法。 The method of claim 1, wherein a flap-type movable lid is provided at a top end of the temporary closing structure.
  6. 　前記工程（ｂ）と前記工程（ｃ）との間に、前記仮締切り構造体の、前記堤体の壁面と対向する部分に、Ｕ字状のゴムガスケットを設置する工程（ｅ）をさらに具備することを特徴とする請求項１記載の浮体式仮締切り工の施工方法。
          Between the step (b) and the step (c), a step (e) of installing a U-shaped rubber gasket on a portion of the temporary closing structure facing the wall surface of the dam body is further provided. The construction method of the floating type temporary cofferdam according to claim 1 characterized by doing.
PCT/JP2014/057485 2013-03-27 2014-03-19 Construction method for temporary floating cofferdam WO2014156864A1 (en)

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CN106120824A (en) * 2016-08-22 2016-11-16 中交第二航务工程局有限公司 A kind of absolute altitude self adaptation steel cofferdam of the end under water that can quickly remove

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