JP4648024B2 - Caisson repair method and repair body used therefor - Google Patents

Description

  The present invention relates to a caisson repair method and a repair body used therefor, and more particularly, a caisson that makes it possible to repair a caisson in which a diving operation is lightened and a side wall is damaged and a filling material flows out easily and reliably. It is related with the repair method of this, and the repair body used for this.

  A wave-dissipating block is arranged outside the caisson port, but the wave-dissipating block is moved by wave force and may collide with the side wall of the caisson and damage the side wall. Such a breakage will be described based on the caisson 1 illustrated in FIGS.

  The interior of the caisson 1 is partitioned by a partition wall 4 and a plurality of compartments 10 are provided. Filling material S is accommodated in each compartment 10, and the upper surface of caisson 1 is covered with upper concrete 6. In FIG. 9, the left side is the outside of the port and the right side is the inside of the port, and the wave-dissipating block 18 is not arranged on the port-inside side wall 3 side of the caisson 1, but 18 is arranged, the wave-dissipating block 18 moved by wave force collides with the port outer side wall 2 and the side wall 2 is damaged. When the damaged part 5 reaches the compartment 10, the filling material S flows out to the outside. Will do.

  The caisson 1 contains a sufficient amount of the filling material S inside for stable installation. However, when the outflow of the filling material S proceeds and the weight is significantly reduced, the stability of the caisson 1 is increased. Therefore, a repairing method is required that reliably repairs even a small damaged portion 5 to ensure a sufficient weight.

  Regarding the repair of the caisson, there has been proposed a method of repairing a gap when a gap is generated at the joint between the caisons provided continuously (see Patent Document 1). In this proposal, a bag material is arranged along the gap, and a curing material is injected into the bag material and cured to close the gap between the caisson joints.

However, it is difficult to arrange the proposed repair material along the side wall where the wave-dissipating block is disposed, and there is a problem that the damaged portion cannot be completely covered with the repair material. In addition, this proposal cannot secure the stability of the caisson by supplementing the weight of the spilled filling material, and requires a new means for repairing the caisson.
JP 2003-41549 A

  An object of the present invention is to provide a caisson repair method and a repair body used for the caisson in which a side wall is damaged and a caisson in which a filling material has flowed out can be easily and surely repaired by diving work. is there.

In order to achieve the above object, the caisson repair method of the present invention is a caisson repair method in which the side wall is damaged and the filling material accommodated in the compartment flows out from the damaged portion, and the caisson repair method is performed from the upper surface of the caisson. A through-hole through which a worker can come and go is drilled in the compartment, and the core rod is exposed on the outer peripheral surface of a roll-shaped civil engineering sheet that is wound with one end fixed to the core rod. The civil engineering sheet is carried into the compartment from the through hole, the core rod is attached to a fixture fixed in advance on the wall surface of the compartment, and then the civil engineering sheet is expanded and stretched on the wall surface of the compartment. Then, after closing the damaged portion, concrete is placed in the compartment.
Another caisson repair method according to the present invention is a caisson repair method in which a side wall is damaged and the filling material accommodated in the compartment flows out from the damaged portion, and the compartment from the upper surface of the caisson. A through-hole through which an operator can go is drilled, and the core rod is exposed on the outer peripheral surface of a roll-shaped civil engineering sheet wound with one end fixed to the core rod, and this wound civil engineering sheet Is inserted into the compartment from the through hole, the core rod is attached to a fixture fixed in advance on the wall surface of the compartment, the civil engineering sheet is expanded, and the ends in the width direction are connected by fasteners. The civil engineering sheet is stretched on the wall surface having the damaged portion, and at this time, the fastener is positioned at the damaged portion, and the fastener is tightened from below to the lower end portion of the damaged portion, to the tightened height. Place concrete in the compartment and place this After curing of the concrete, by tightening the fastener to an upper end portion so as to cover the damaged portion, and is characterized in that concrete is cast to the rest of the compartment.

Further, the repair body of the present invention is a repair body used for repairing the caisson where the side wall is damaged and the filling material accommodated in the compartment flows out from the damaged portion, and one end portion is fixed to the core rod. A plurality of civil engineering sheets that are wound and have fasteners at both ends in the width direction and that can hold concrete, the plurality of civil engineering sheets are wound around the outer peripheral surface that is rolled to form the core rod In the exposed state, the core rod is attached to a fixture fixed in advance on the wall surface of the compartment, and then stretched on each wall surface of the compartment, and the end portions in the width direction are connected to each other by the fastener. It is formed in a cylindrical shape along the wall surface of the compartment, and the damaged portion can be closed.

According to the former caisson repair method of the present invention, the side wall is damaged, and the filling material accommodated in the compartment flows out from the damaged portion. A through-hole through which an operator can go is drilled, and the core rod is exposed on the outer peripheral surface of a roll-shaped civil engineering sheet wound with one end fixed to the core rod, and this wound civil engineering sheet was carried into the compartment from the through hole, after attaching the mandrel to advance fixed to the fixture to the wall surface of the compartment to expand the civil engineering sheet, the breakage portion is stretched on the wall surface of the compartment Since it is closed, the operator's diving work is performed safely only in the compartment with less wave influence. In addition, since the civil engineering sheet with one end wound around the core rod is fixed, it is possible to easily carry in large-sized civil engineering sheets. Since only the damaged part is closed, the labor can be reduced. In addition, since the concrete is placed after the damaged part is closed with a civil engineering sheet, the damaged part is easily and surely closed, and the overflowing filling material is supplemented with concrete to stabilize the caisson to a predetermined weight and repair. Can be completed.

According to the latter caisson repair method of the present invention, the side wall is damaged, and the filling material accommodated in the compartment flows out of the damaged portion. A through-hole through which an operator can go is drilled, and the core rod is exposed on the outer peripheral surface of a roll-shaped civil engineering sheet wound with one end fixed to the core rod, and this wound civil engineering sheet Is inserted into the compartment from the through hole, the core rod is mounted on a fixture fixed in advance on the wall surface of the compartment, the civil engineering sheet is developed, and the ends in the width direction are connected by fasteners. The civil engineering sheet is stretched on the wall surface having the damaged part, and at this time, the fastener is positioned at the damaged part, and the fastener is tightened from below to the lower end part of the damaged part, and separated to the tightened height. Concrete was placed in the room and this was After curing, the fastener is tightened to the upper end so as to block the damaged part, and concrete is placed in the remaining part of the compartment. While minimizing, work can be made more efficient and repairs can be completed.

According to the repair body of the present invention, the side wall is damaged, and the filling material accommodated in the compartment is used for repairing the caisson that has flowed out from the damaged portion, and one end portion is fixed to the core rod. A plurality of civil engineering sheets that are wound and have fasteners at both ends in the width direction and that can hold concrete, and the plurality of civil engineering sheets are wound around the outer peripheral surface that is rolled to form the core rod. In the exposed state, the core rod is attached to a fixture fixed in advance on the wall surface of the compartment, and then stretched on each wall surface of the compartment, and the end portions in the width direction are connected to each other by the fastener. Since it is formed in a cylindrical shape along the wall surface of the compartment and can close the damaged portion, it can be used in the caisson repair method of the present invention described above, and the effect of this repair method can be obtained. Can do. That is, the diving work can be lightened, and the damaged portion can be easily and surely closed and repaired so that the caisson is stabilized to a predetermined weight by being supplemented with concrete.

  Hereinafter, the caisson repair method of the present invention and the repair body used therefor will be described based on the embodiments shown in the drawings.

  In order to repair the damaged caisson 1 illustrated in FIGS. 8 to 9, as shown in FIG. 1 as a first process, it penetrates into the compartment 10 in which the filling material S flows out from the upper concrete 6 which is the upper surface of the caisson 1 Hole 7 is drilled. The through-hole 7 has a size that allows an operator to travel. It is preferable that a diver who is an operator enters the compartment 10 from the through hole 7 and anchors the anchor 17 in advance on the upper portion of the wall surface W of the compartment 10.

As a second process, as shown in FIG. 2, the civil engineering sheet 13 having one end fixed and wound around the core rod 11 is carried into the compartment 10 from the through hole 7. Thereby, the civil engineering sheet 13 having a large area can be made compact and easily carried in. The method for winding the civil engineering sheet 13 is such that the core rod 11 is exposed on the outer peripheral surface of the rolled civil engineering sheet 13 in the form of a roll. In the present invention, “winding” includes small folding.

  If there is a space around the damaged portion 5 outside the side wall 2, the anchor plate 8 is anchored outside the side wall 2 so as to cover the damaged portion 5 in advance before the civil engineering sheet 13 is carried into the compartment 10. If it is fixed at 9 or the like, seawater can be prevented from flowing into the compartment 10 and the operation can be facilitated.

  As shown in FIG. 6 as the third process, the civil engineering sheet 13 is unfolded after the core rod 11 to which one end of the civil engineering sheet 13 is fixed is attached to the anchor 17 fixed in advance. Since the civil engineering sheet 13 rolled up after fixing the core rod 11 is developed, it is easy even in diving work.

  The civil engineering sheet 13 is made of a material capable of holding the concrete C to be placed, and a woven fabric, a nonwoven fabric, a knitted fabric or the like made of a polymer material used for civil engineering or the like called a so-called geotextile can be used. In addition, any material that can hold concrete C, such as a rubber sheet or various resin sheets, can be used.

  The upper end portion of the civil engineering sheet 13 has a belt shape having a plurality of through holes 15, and is fixed to the core rod 11 by binding the through holes 15 with a string or the like. The fixing means is not limited to this, and general means can be used.

  The civil engineering sheet 13 is stretched so that the damaged part 5 is closed by the civil engineering sheet 13 at least as the wall surface W having the damaged part 5, that is, the damaged wall surface W of the compartment 10. It is preferable to form a cylindrical shape along the wall surface W.

  Specifically, as illustrated in FIG. 5, fasteners 14 are provided at both ends of four civil engineering sheets 13 a to 13 d that are stretched on the respective wall surfaces W of the compartment 10, and the end portions are fastened by the fasteners 14. Connect to form a cylinder. By stretching in this way, the civil engineering sheets 13a to 13d are less likely to be displaced and can be more stably stretched.

  Of the four civil engineering sheets 13 a to 13 d, it is preferable that the tensile strength of one civil engineering sheet 13 that closes the damaged portion 5 is higher than that of the other civil engineering sheets 13. Further, when the civil engineering sheets 13a to 13d are sufficiently reinforced, a reinforcing belt 16 is provided.

  If the lower end portion of the civil engineering sheet 13 can be folded, as shown in FIG. 3, the folded lower end portion is aligned with the bottom surface L, and is fixed with a presser 12 or the like, so that the civil engineering sheet 13 at the time of placing concrete C is fixed. It is possible to prevent the curling and reliably fill the compartment 10 with the concrete C. When the lower end portions of the respective civil engineering sheets 13 are closely connected to form a bag shape, the leakage of the concrete C to be placed can be minimized.

  As described above, the third process of closing the damaged portion 5 from the compartment 10 side by the civil engineering sheet 13 is completed.

  As shown in FIG. 4 as a fourth process, concrete C is placed in the compartment 10 from the through hole 7 to fill the compartment 10 and the through hole 7. The placing of the concrete C may be divided once or plural times. Since the damaged part 5 is blocked by the civil engineering sheet 13, the concrete C does not flow out to the outside, and the concrete C is filled and solidified without a gap. As a result, the caisson 1 lightened by the outflow of the filling material S is supplemented to a predetermined weight by the concrete C and stabilized and repaired.

  In the embodiment, the anchor 17 is used to fix the civil engineering sheet 13 to the wall surface W of the compartment 10, but the present invention is not limited to this, and other fixing tools can be used. Further, the number and shape of the civil engineering sheets 13 to be connected can be appropriately determined depending on the conditions such as the damaged portion 5 and the compartment 10.

  When the inflow of seawater from the damaged part 5 is intense before the concrete C is placed, the civil engineering sheet 13 stretched on the wall surface W of the compartment 10 is easily damaged or dropped off. In such a case, as shown in FIG. 7, first, the civil engineering sheet 13 is stretched on the wall surface W of the compartment 10 so that the fastener 14 is positioned at the damaged portion 5, and the fastener 14 is moved from below to the lower end of the damaged portion 5. Tighten to the part, and place concrete C to the tightened height. Next, after curing of the concrete C, the upper part of the civil engineering sheet 13 is tightened so as to close the damaged part 5 with the fastener 14, and the concrete C is placed in the remaining part of the compartment 10.

  According to this repair method, it is possible to improve the work efficiency and complete the repair while minimizing the shift of the civil engineering sheet 13 due to the seawater flowing into the compartment 10 from the damaged portion 5.

It is a longitudinal cross-sectional view explaining the 1st process of the repair method of this invention. It is a longitudinal cross-sectional view explaining the 2nd process of the repair method of this invention. It is a longitudinal cross-sectional view explaining the 3rd process of the repair method of this invention. It is a longitudinal cross-sectional view explaining the 4th process of the repair method of this invention. It is a perspective view which shows an example of the repair body of this invention. It is explanatory drawing which shows the state which fixes the civil engineering sheet which comprises the repair body of this invention to the wall surface of a compartment. It is explanatory drawing which illustrates the state which fastens the fastener of a civil engineering sheet in the repair method in case the inflow of the seawater from a damaged part is intense. It is a front view which shows the damaged caisson. It is AA sectional drawing of FIG.

Explanation of symbols

1 Caisson 2 Port side wall 3 Port side wall 4 Bulkhead 5 Damaged part 6 Upper concrete (upper surface of caisson)
DESCRIPTION OF SYMBOLS 7 Through-hole 8 Wave-proof board 9 Anchor for wave-proof board 10 Compartment 11 Core rod 12 Presser 13, 13a-13d Civil engineering sheet 14 Fastener 15 Through-hole 16 Reinforcement belt 17 Anchor for civil engineering sheet 18 Wave-dissipating block S Filling Material C Concrete

Claims (6)

A method of repairing a caisson in which a side wall is damaged and the filling material accommodated in the compartment flows out from the damaged portion, and a through-hole through which an operator can go to the compartment from the upper surface of the caisson is formed. The core rod is exposed on the outer peripheral surface of a roll-shaped civil engineering sheet which is wound with one end fixed to the core rod, and the wound civil engineering sheet is carried into the compartment through the through hole. After attaching the core rod to a fixture fixed in advance on the wall surface of the chamber, the civil engineering sheet is unfolded and stretched on the wall surface of the compartment to close the damaged portion, and then the concrete is placed in the compartment. How to repair the caisson to be placed. A plurality of civil engineering sheets that are wound with one end fixed to the core rod are loaded into the compartment, and the plurality of civil engineering sheets are expanded and stretched on the respective wall surfaces of the compartment, and are stretched. The caisson repair method according to claim 1, wherein end portions in the width direction of the sheet are connected to form a cylindrical shape along a wall surface of the compartment, and the damaged portion is closed. The caisson repair method according to claim 2, wherein fasteners are provided at both ends in the width direction of the respective civil engineering sheets, and the end portions in the width direction are connected by the fasteners to form a cylindrical shape. A method of repairing a caisson in which a side wall is damaged and the filling material accommodated in the compartment flows out from the damaged portion, and a through-hole through which an operator can go to the compartment from the upper surface of the caisson is formed. The core rod is exposed on the outer peripheral surface of a roll-shaped civil engineering sheet which is wound with one end fixed to the core rod, and the wound civil engineering sheet is carried into the compartment through the through hole. The civil engineering sheet is developed after attaching the core rod to a fixture fixed in advance on the wall surface of the chamber, and the civil engineering sheet in which the ends in the width direction are connected to each other by fasteners is attached to the wall surface having a damaged part. Tighten and tighten the fastener from below to the lower end of the damaged part, and cast concrete into the compartment to the tightened height. After curing concrete, block the damaged part Tighten the fastener to the upper end portion, method of repairing a caisson of concrete is the rest of the compartment. The side wall is damaged, and the filling material contained in the compartment is used for repairing the caisson that has flowed out of the damaged portion, and one end portion is fixed to the core rod and wound, and both end portions in the width direction A plurality of civil engineering sheets that can hold concrete, and the plurality of civil engineering sheets are wound around the outer peripheral surface in a roll shape so that the core bar is exposed, and the compartment is After the core rod is attached to a fixture fixed in advance on the wall surface of the wall, the core rod is stretched on each wall surface of the compartment, and the end portions in the width direction are connected to each other by the fasteners along the wall surface of the compartment. A repair body that is formed in a cylindrical shape and that can block the damaged portion.   The repair body according to claim 5, wherein a tensile strength of one civil engineering sheet among the plurality of civil engineering sheets is higher than that of other civil engineering sheets.

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