JP4874889B2 - Steel sheet pile structure repair method and work boat for repair - Google Patents

Description

  The present invention secures a predetermined work space for repair work such as inspection, repair, reinforcement work, etc. of a structure using a steel sheet pile as an underwater structure on a quay or revetment of a harbor. The present invention relates to a repair method using a water stop box and a repair work boat used for the repair method.

  Steel sheet pile structures that use steel sheet piles as underwater structures on the quay of a port, etc., have been aged for many years after completion, and are repaired and reinforced according to their deteriorated state. Construction is required. In particular, it is difficult to perform underwater construction using conventional divers in the inspection, repair, and reinforcement work of steel sheet pile structures such as corroded and damaged strips, which are often corroded and damaged, in the gas-liquid fluctuation area. It is desirable to secure a predetermined working space that is not affected by seawater so that construction can be performed. In order to meet this demand, a water-stop box with an open front is brought into contact with the steel sheet pile structure to determine the predetermined space. A construction method to secure a working space has been developed and proposed.

  For example, in Patent Document 1 below, a tube-shaped sealing material that comes into contact with a steel sheet pile is provided at the front end portion of the bottom plate portion of the box body whose front surface is open and the front end portions of both side plate portions. It has been proposed that the sealing material is brought into contact with a steel sheet pile to stop the water between the box and the steel sheet pile and to carry out repair work while retaining a predetermined work space.

  In Patent Document 2, elastic bodies such as rubber material and foamed resin are respectively attached to the bottom plate portion of the box whose front surface is open and the front end portions of both side plate portions, and the elastic bodies are made of steel. It has been proposed to perform repair work using a water stop box that keeps water between the box body and the steel sheet pile by bringing it into contact with the surface of the sheet pile and holds a predetermined work space.

Conventionally, in the conventional methods disclosed in Patent Document 1 and Patent Document 2 and the like, the water stop box is lifted by a crane or the like installed on a land portion near the quay and lowered from the quay side to the sea side, and this is steel of the quay. It is operated and installed so as to contact the sheet pile structure.
Japanese Utility Model Publication No. 62-163532 JP 2003-212186 A

  In conventional installation work with a crane from the land side, the crane operator cannot confirm the state of the installation location, so it is necessary to rely on an underwater diver to check the installation status, and the installation work is difficult to perform. Takes time to install. In addition, it is necessary to install a crane truck in the land near the quay, and the strength to withstand it is required. In addition, there are problems such as the fact that there are only undulating terrain such as rocky places and a small space, and the water stop box cannot be installed when a crane truck cannot be put in. Therefore, the workability when using a water stop box is remarkably impaired, and the work is labor intensive and time consuming, and repair of the steel sheet pile structure is expensive.

  Furthermore, in repair work such as repair and reinforcement, exfoliation debris is generated due to rust removal and deposit removal, etc., but there is also a problem that if this is released into the sea as it is and discarded, it will contaminate the sea in the harbor. Therefore, it is also desired that the disposal process can be easily performed.

   The present invention has been made to solve the above-mentioned problems, and repairs of the steel sheet pile structure, that is, repair work including each work such as inspection, repair, reinforcement, etc. is performed using a dedicated work ship. Thus, the present invention provides a repair method that can be performed by easily installing a water stop box at a predetermined location by the work from the sea, that is, a dedicated work ship for repair.

  Furthermore, it is possible to temporarily store exfoliation debris from rust removal and deposit removal etc. during repair work, and to repair the problem of releasing the exfoliation debris etc. into the sea in the harbor. A work ship is provided.

The steel sheet pile structure repair method of the present invention that solves the above-mentioned problems includes a front open-type water stop box for repair work that surrounds a part of the steel sheet pile structure on the quay to be repaired. A repair method for a steel sheet pile structure in which a front surface of a water box is brought into contact and a predetermined work space is secured by the water stop box to perform repair work, the water stop box for the repair work, and the water stop box on the side A repair work ship equipped with a lifting and moving device that lifts more outwardly is allowed to stay so as to maintain a predetermined interval with respect to the quay to be repaired, and the water stop box lifted by the lifting and moving device is While approaching the steel sheet pile structure of the quay to be repaired from the work ship side, it is lowered to a predetermined height in water from between the work ship and the quay, and the front surface of the water stop box is opposed to the steel sheet pile structure. The front of the water stop box against the steel sheet pile structure And discharging the water in該止water box with to a repair work performed installed to ensure a predetermined work space, previously preparing a plurality of water stop box along one broadside of the work ship The plurality of water stop boxes are installed in contact with the steel sheet pile structure in parallel with an interval narrower than the lateral width of the water stop box, and repair work is performed for each water stop box. Each said water stop box is moved to the part between the said installation positions, this water stop box is made to contact | abut to a steel sheet pile structure, and repair work is performed for each water stop box .

  According to the repair method of the present invention, for example, when installing a water stop box for repair work at a predetermined location of a steel sheet pile structure to be repaired at a quay of a harbor, an operator installs it from a repair ship on the sea side. Operate the lifting and moving device while checking the location to move the suspended water stop box to a specified position between the specified anchor side and the quay, and to abut the specified location of the steel sheet pile structure on the quay It is possible to install the water stop box easily.

  In addition, since the water stop box is installed between the repair work ship and the quay, the work ship plays a role of protecting against strong winds and sea waves, and during the work of installing the water stop box or subsequent repair work. At this time, the influence of wind and waves on the water stop box can be reduced, and repair work can be performed safely.

In addition , a plurality of water stop boxes are prepared along one side of the work boat, a plurality of water stop boxes are installed in contact with the steel sheet pile structure, and repair work is performed for each water stop box. It is performed, thereby improving the efficiency of repair work.

Further , the plurality of water stop boxes are installed in parallel with a gap narrower than the width of the water stop box in contact with the steel sheet pile structure, and repair work is performed for each water stop box. , the respective waterproofing box, is moved to the gap portion between the previous installation position, the該止water box installed is brought into contact with the steel sheet pile structure, since the repair work in each water stop boxes, steel Repair work of sheet pile structures can be performed more efficiently.

Further, the present invention surrounds a part of the steel sheet pile structure on the quay to be repaired, that is, a repair work ship used for the repair method of the steel sheet pile structure, that is, a water stop box for repair work with an open front. The watercraft is a repair work ship for bringing a front face of the waterstop box into contact and securing a predetermined work space by the waterstop box to perform repair work, and projecting from at least one side of the waterside, A space retaining means for retaining and anchoring at a predetermined distance, and a water stop box for the repair work of the front open type formed by a bottom plate portion, a rear plate portion and both side plate portions and provided with a drainage pump; A lifting and moving device capable of lifting and moving the water stop box, and the lifting and moving device moves the lifted water stop box from the work ship side so as to approach the steel sheet pile structure to be repaired. , Work boat and quay Drop off from between a predetermined height position in the water, Ri name provided to the front of該止water box so as to face the steel sheet pile structure, on the deck of the working ship, along one broadside A movable handling tower is provided, and the lifting and moving device includes a crane device movable along the horizontal support material on a horizontal support material protruding outward from the handling tower from the handling tower, A repair work ship is provided which is provided so as to support and lift the water stop box at two points by two hook-suspended means hanging from the main body of the crane device. By using this repair work ship, each water stop box can be lifted in a two-point support state and can be hung outward while restraining rocking and turning, and can be easily placed in place on the steel sheet pile structure. It can contact and be installed.

  In addition, the present invention includes a plurality of water stopping boxes provided at predetermined intervals along at least one side of the work boat, and the plurality of water stopping boxes can be lifted and moved in a two-point supported state. It is provided with a moving device, and is provided so that the water stop box lifted by each lifting and moving device can be hung outward from the heel side.

  Thereby, in the work from the work ship side, each of the plurality of water stop boxes can be lifted and moved with stability while suppressing swinging and turning by the lifting and moving device, respectively. It can be easily brought into contact with the place. When the repair work in each water stop box is completed, each water stop box is lifted by each lifting and moving device, removed from the installation position, and moved to a position corresponding to the non-repaired position between the previous installation points. Thus, it can be installed and repaired in the same manner as described above. As a result, the repair work of the steel sheet pile structure with a long quay can be efficiently performed.

  Moreover, the said work ship shall be provided with the conveyor for collection | recovery of the peeling waste pieces peeled and removed from the steel sheet pile structure, and the primary storage of this peeling waste pieces. As a result, exfoliation scraps generated by removing rust, removing attached substances, etc. can be recovered once without being released into the sea and transported to a predetermined disposal position by a work ship for disposal. As a result, the sea in the harbor will not be polluted.

  Further, the repair work ship is equipped with a high pressure washer, a sand blasting device, a compressor and the like for repair work. Thereby, cleaning operations such as removal of deposits on the steel sheet pile structure to be repaired can be easily performed.

  In the repair work ship, the space holding means between the quay side and the quay can hold a predetermined distance by a stay having an elastic body installed at the tip projecting from the shore side and coming into contact with the quay. It is a fender, preferably provided in two upper and lower tiers.Further, the fender is a roller type fender in which a roller having a horizontal axis parallel to the heel side is attached to the tip of the stay. It is preferable that the roller is provided so as to be able to roll up and down in contact with the quay.

  As a result, the fender is elastically abutted against the quay, so that the distance between the dock side of the work ship and the quay can be kept constant, especially in the case of a roller type fender having a roller at the tip, the sea surface due to tides It is possible to follow up and down fluctuations without difficulty and to keep the interval constant and stable.

  As described above, according to the steel sheet pile structure repair method of the present invention, using a dedicated repair work ship, repair work for securing a work space by work from the work ship side, that is, from the sea side. The water stop box can be easily installed at the specified location while checking its installation location, so the installation time of the water stop box can be greatly shortened, and the land near the quay has a rough terrain such as a rocky place. Even if there is only a small space, the water stop box can be installed without any problem for repair work. Therefore, the work time and labor when using the water stop box for repair work can be greatly reduced, and the efficiency, rationalization, and cost reduction of the repair work of the steel sheet pile structure can be achieved.

  In addition, according to the repair work ship of the present invention, it is possible to facilitate the implementation of the repair method and improve the repair efficiency, and further, the work ship is used for removing rust, removing deposits, and the like. The peeled debris can be transported to a predetermined disposal position and discarded without being released into the sea, which can contribute to the reduction of sea pollution in the harbor.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  FIG. 1 is a schematic plan view of a repair work ship used in a repair method such as inspection, repair, reinforcement work, etc. of a steel sheet pile structure of the present invention, FIG. 2 is a side view showing an outline of the work ship, FIG. Fig. 4 is a partially enlarged side view of a state in which the water stop box is lifted, Fig. 4 is a front view of a part of the same, Fig. 5 is a schematic sectional view of the state in which the water stop box is installed, and Figs. FIG. 8A and FIG. 8B are explanatory views of the installation state of the water stop box.

  In the figure, reference numeral 1 denotes a dredged repair work boat, which is configured in the same manner as a conventional work table ship, etc., and can move to any place on the sea by self-navigation or by towing. Yes. The work ship 1 includes a space holding means 2 for holding a predetermined space S necessary for installing a water stop box between at least one side 1a and the quay wall 50, and steel made on the quay wall 50. A water stop box 3 for repair work for securing a predetermined work space by being installed in contact with the sheet pile structure 51, and one or a plurality of lifting and moving devices 4 capable of lifting and moving the water stop box 3 are provided. ing.

  As the space holding means 2, stays 21 protrude laterally from the dredging side 1 a at a part of at least one dredging side 1 a of the work boat 1, preferably at two positions on the front and rear portions (the bow side and the stern side). When the leading end of the lever abuts against the quay 50 such as concrete, an interval S (for example, the width in the front-rear direction of the water proof box) is required to lower and install the water stop box 3 between the shore side 1a and the pier 50. In the case of a maximum of 1.5 m, the fender 20 has a buffering function capable of holding an interval of 2 to 4 m.

  The fender 20 is preferably provided at a position that contacts the edge end surface 50a protruding from the surface position of the steel sheet pile structure 51 on the quay 50. Since the edge part end face 50a may not be contacted, the fenders 20 are usually provided in two upper and lower stages at intervals as shown in FIGS. 6 and 7, and at least one of the fenders varies even if the tide level fluctuates. Is provided so as to be able to contact the edge end surface 50a. Of course, depending on the dimension in the vertical direction, one fender can be provided, or one fender can be provided to be movable up and down. WL in the figure indicates the sea level.

  In any case, in order to have a buffer function, an elastic body such as a strong rubber material used for the tire is provided at the tip of the stay 21 so as to be elastic with respect to the quay 50. It is preferable to allow contact.

  In the case of FIGS. 6 and 7, the upper and lower two-stage fenders 20 as the space holding means 2 are roller-type fenders each having a roller 22 having a horizontal axis parallel to the heel side 1 a attached to the tip. The roller 22 is provided so as to be able to roll up and down while being in contact with the quay 50, so that the fender 20 can smoothly move up and down as the work boat 1 moves up and down due to fluctuations in tide level. It is like that. The roller 22 may be a rigid roller, but in practice, a roller made of an elastic material such as a rubber material is preferable because it can absorb an impact when contacting the quay 50.

  In addition, the distal end side member 21a of the stay 21 can be inserted into and retracted from the base side member 21b, and the protruding length of the stay 21, that is, the distance S between the heel side 1a and the quay wall 50 can be adjusted and set as appropriate. It is preferable to configure as described above.

  11a. 11b is a connecting member for anchoring a rope, a rope, or the like connected to the winch 12 installed in the work boat 1, and the connecting members 11a. 11b is connected to a land-use connecting projection, or a dredger is lowered, so that the work boat 1 is provided on the sea near the quay 50 with the space S and can be appropriately anchored.

  The water stop box 3 has a flat rectangular bottom plate portion 31, a rear plate portion 32 connected to the rear end portion of the bottom plate portion 31, and is connected to both sides of the bottom plate portion 31 and connected to the rear plate portion 32. A box body 30 having an open front surface and an upper surface that are opposed to the steel sheet pile structure 51 is configured by the side plate portions 33 and 33. The bottom plate portion 31, the rear plate portion 32, and the side plate portions 33, 33 are integrally connected to each other by welding means or the like, and are configured so that water does not enter from the connection portion.

  The front end portion of the bottom plate portion 31 has a concavo-convex shape substantially corresponding to the concave portion 51 a and the convex portion 51 b on the surface of the steel sheet pile structure 51, and the both side plate portions 33 and 33 are front end portions of the bottom plate portion 31. Is formed so that the front end portions of the side plate portions 33, 33 are in contact with the inner bottom surface of the recess 51 a of the steel sheet pile structure 51. Usually, an elastic body (not shown) is attached to the front end portions of the bottom plate portion 31 and the left and right side plate portions 33, 33 for buffering and maintaining airtightness when contacting the steel sheet pile structure 51. Yes. As these elastic bodies, in addition to a normal rubber material, a sponge-like rubber material or a hollow tube-like material can be used.

  A work floor body 34 such as a net is installed on the bottom plate portion 31 inside the box body 30, and a drain pump 35 for draining water that has entered the lower portion of the floor body 34 is provided. Further, a pulling means such as a lever block for pulling the box body 30 toward the steel sheet pile structure 51 of the quay wall 50 and a locking portion 37 for locking the connecting member 36 are provided. Further, an annular locking portion 38 for locking a locking hook such as a crane is provided at a required location such as the upper end portion of the both side plate portions 33 and 33.

  In the case of the figure, a plurality of water-stop boxes 3 having the above-mentioned configuration are arranged in parallel with the front side facing the outer side of the dredging side in the temporary placement part set near the one side of the dredging side 1a on the deck of the work boat 1, In particular, they are arranged in a row in the longitudinal direction of the heel side 1a at intervals narrower than the lateral width W of the water stop box 3 so as to be appropriately lifted by the lifting and moving devices 4 described later.

  The lifting and moving device 4 may be any device as long as it can lift and move the water stop box 3 and hang it outward from the heel side, but in the case of the illustrated embodiment Is configured as follows.

On the deck of the work boat 1, a moving rail 41 is provided along the one side 1 a, particularly on the inner side of the temporary storage portion of the water stop box 3, and handling is possible on the rail 41. A tower 42 is installed, and a pair of parallel two pairs projecting a required length (for example, 2 to 5 m) to the sea side outside the shore side 1a with a space between the front and rear portions of the handling tower 42. Horizontal support members 43 and 43 are provided. As the lifting and moving device 4, a hoist type crane device 45 having hooking means 44 with hooks is laid over the two horizontal support members 43 and 43 at the front and rear portions so as to be movable in the longitudinal direction. Two sets of water-stopping boxes 3 that are temporarily placed on the heel side 1a side of the rail 41 by two hanging means 44 with hooks each hanging from the main body 45a of each crane device 45 are provided. It is provided so that it can be lifted in a supported state and hung outwards perpendicular to the heel side 1a. Reference numeral 44 a denotes a hook for locking the suspension means 44.

Further, the distance between the two crane devices 45 before and after the handling tower 42 is set to be approximately twice the arrangement interval of the water stop boxes 3 in the temporary placement portion of the water stop box 3. It is comprised so that every two water stop boxes 3 can be lifted and moved simultaneously. Further, the distance between the two suspension means 44 of the crane device 45 provided on the two horizontal support members 43, 43 is provided so as to be adjustable according to the lateral width of the water stop box 3 to be lifted. As a means for this , a crane device 45 is laid over and placed on a pair of the horizontal support members 43 , 43 , and the interval can be adjusted by slide adjustment of the horizontal support members 43, 43. be able to.

The lifting and moving device 4 is not limited to a crane device that is provided on the horizontal support members 43 and 43 and can move in one direction, and a self-propelled crane or a swingable crane can also be used.

  A recovery conveyor is provided on the deck of the work ship 1 to recover the debris generated by removal of rust removal and oyster deposits during repair work. It is provided so as to be transported to a temporary storage 6 in the ship 1. In the case of the figure, the recovery conveyor 5 is a first belt conveyor 5a provided along the heel side 1a on the heel side 1a side with respect to the rail 41 for movement of the handling tower 42 and the temporary storage part of the water stop box 3. And a second belt conveyor 5b orthogonal thereto.

  In addition to the above components, the work boat 1 is equipped with a fresh water tank 7, a high pressure washer 8, a compressor 9, a sand blasting device 13 and a sand blasting place 14, and further a fuel tank 15 and a generator chamber 16. A warehouse 17, a worker resting place 18, a site management office 19, and the like are set as necessary. In addition, the work boat 1 is equipped with equipment and a set of equipment necessary for repair work.

  Next, the repair method of the present invention using the repair work boat 1 will be described.

  First, in a port where there is a quay 50 where repair work is to be performed, the work boat 1 is brought into contact with the berth 1a on the sea near the quay 50 to be repaired in the port while maintaining a predetermined interval on one side. Tether. At this time, the connection members 11a. The position of 11b is adjusted and positioned. At the same time, the tip of the stay 21 constituting the fender 20 as the space holding means 2 provided on one side 1a of the work ship 1, for example, the roller 22 as shown in FIGS. Attaching to the edge end surface 50a is anchored so as to maintain a predetermined distance S between the quay wall 50 to be repaired and the side 1a of the work boat 1 (FIG. 1). This can cope with fluctuations in tide level without any problems.

In the state where the work boat 1 is set at a predetermined position as described above, the water stop box 3 arranged in parallel with the temporary storage portion on the work boat 1 near the side 1a is used as a lifting and moving device 4 as a handling tower. The front and rear portions projecting from 42 are lifted by a crane device 45 provided on a set of horizontal support members 43, 43 (FIGS. 3 and 4). That is, the hooks 44 a for locking the two hanging means 44 of each set of the crane device 45 are locked to the locking portions 38 at the upper ends of the side plate portions 33 of the water stop box 3 and lifted. At this time, the interval between the two suspension means 44 of the crane device 45 is adjusted and set in advance according to the lateral width of the water stop box 3.

  In this way, the hooks 44a of the two suspension means 44 of the crane device 45 are locked to the locking portion 38 of the water stop box 3 and the crane device 45 is operated, so that swinging or rotation occurs in a two-point supported state. Can be lifted without being

  In the state of being lifted as described above, the lifted water stop box 3 is approximately aligned with the position of the steel sheet pile structure 51 to be repaired on the quay 50 by the movement of the handling tower 42 on the moving rail 41. Then, the crane device 45 on the horizontal support member 43 is moved to the front end side along the horizontal support member 43, and the water-stopping box 3 in a state of being lifted is confirmed on the side 1a while checking from the work ship 1 side. The steel sheet pile structure 51 is hung outward and brought close to the steel sheet pile structure 51 and lowered to a predetermined height in water so as to face the steel sheet pile structure 51 so as to be as close to the steel sheet pile structure 51 as possible. .

  In this state, while confirming and positioning the installation locations in the water stop box 3 and the steel sheet pile structure 51, the front end of the water stop box 3, that is, the bottom plate portion 31, and the front end portions of the both side plate portions 33, 33 are connected to the steel plate. It abuts against the sheet pile structure 51. This abutment uses the pressing means (not shown) provided in the repair work boat 1 to press the water stop box 3 from the back, or the water stop box 3 brought closer by the crane device 45 as described above. Is attracted to the steel sheet pile structure 51 by using a pulling means such as a chain block. And by discharging the seawater in the water stop box 3 with the drainage pump 35, the front end of the water stop box 3 is made to the surface of the steel sheet pile structure 51 using the water pressure acting on the water stop box 3. The water tightness is ensured by tightly adhering, and a predetermined work space is secured. Normally, in this state, the steel sheet pile structure 51 is held by the traction means or the connecting member 36 as shown in FIG.

  In addition, since the installation work of the water stop box 3 is performed between the work ship 1 and the quay 50 as described above, the work ship 1 serves to protect against strong winds and waves, and the effects of waves and the like are affected. It can be reduced, and the installation operation can be performed relatively safely and easily.

  Next, in the state where the water stop box 3 is installed as described above, the suspension means 44 of the crane device 45 which is the lifting and moving device 4 is removed from the locking portion 38 of the water stop box 3 and the crane device 45 is horizontally supported. After returning to the position on the material 43, the handling tower 42 is moved to the position of another water stop box 3, and the water stop box 3 is supported at two points by the two suspension means 44 of the crane device 45 as described above. The water stop box 3 is installed at a predetermined position of the steel sheet pile structure 51 on the quay 50 by the same operation procedure as described above.

  Thus, for example, as shown in FIG. 8 (a), cleaning is performed such as removing rust and removing deposits in a state where the four water stop boxes 3 are installed at regular intervals with respect to the steel sheet pile structure 51 on the quay 50. Work, repair and reinforcement work. At this time, exfoliation debris generated by removing rust, removing attached matter, etc. is transported to the temporary storage 6 by the recovery conveyor 5 on the work ship 1 and stored without being released into the sea. After the repair work is completed, the work ship 1 transports it to a predetermined disposal position and discards it.

When the repair work within the length range in each water stop box 3 is completed, each water stop box 3 is lifted by the crane device 45 as the lifting movement device 4 and fixed to the steel sheet pile structure 51. Then, the crane device 45 is retracted and each water stop box 3 is returned to the temporary storage portion of the work boat 1. Subsequently, the handling tower 42 is moved to move the position of the crane device 45 on the horizontal support member 43 to a portion between the previous installation positions of the water stop box 3. It is lifted and moved by the device 45, hung outward from the heel side 1a, brought close to the steel sheet pile structure 51, and lowered to a predetermined height position in the water while checking the steel sheet pile structure 51 and the water stop box 3. The steel sheet pile structure 51 is opposed to and brought into contact with the steel sheet pile structure 51, and the water stop box 3 is installed so as to surround a portion between the previous installation positions on the surface of the steel sheet pile structure 51, that is, an unrepaired portion. FIG. 8 (b)]. In this way, the previous unrepaired part is repaired. Thereby, the repair work of the length range for 1 cycle in the installation state of the water stop box 3 of Fig.8 (a) and (b) is completed. In the figure, L0 indicates the length of the repair work for one cycle, and L1 indicates the length of the repair work for each water stop box 3.

  When the repair work for the length L0 of one cycle is completed, the water stopping boxes 3 are once returned to the temporary storage portion on the work boat 1 by the crane device 45, and then the handling tower 42 is moved to the steel sheet pile structure 51. In the same manner as described above, the water stop box 3 is brought into contact with the steel sheet pile structure 51 to perform the repair work. When this repair work is completed, the work boat 1 is then moved to a position corresponding to the steel sheet pile structure 51 following the portion of the length L0 where the repair work has been completed. The water box 3 is in contact with the steel sheet pile structure 51 to be repaired for repair work. Thereby, the repair work of the steel sheet pile structure 51 on the considerably long quay 50 can be performed easily and efficiently.

  In particular, the installation work of the water stop box 3 for repairing the steel sheet pile structure 51 can be safely and easily performed while checking the suspended water stop box 3 and the installation location from the work boat 1 on the sea side. Even if the land where the quay 50 is located is a rough terrain such as a rocky place or there is only a small space, the water stop box can be installed without any problems for repair work. it can.

  In addition, it is possible to transport and dispose of debris generated by rust removal and deposit removal in the above repair work to a predetermined disposal location without being released into the sea, thus reducing sea pollution at the port. Can also contribute.

  The steel sheet pile structure repair work method and repair work ship of the present invention can be suitably used for work such as inspection, cleaning, repair and reinforcement of the steel sheet pile structure of the quay in the harbor, and in the quay other than the steel bay. It can also be suitably used for repairing steel sheet pile structures.

It is a schematic plan view of the repair work ship used in repair methods, such as a test | inspection of steel sheet pile structure of this invention, repair, and reinforcement construction. It is a side view which shows the outline of the work ship. It is a partial enlarged side view of the state which lifted the water stop box. It is a partial front view same as the above. It is a schematic sectional drawing of the state which installed the water stop box. It is a schematic enlarged view of a fender portion as an interval holding means. It is a schematic enlarged view of a state where the tide level has changed. (A) And (b) is explanatory drawing of the installation state of a water stop box.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Work ship for repair, 1a ... Side side, 2 ... Space holding means, 3 ... Water stop box, 4 ... Lifting movement apparatus, 5 ... Recovery conveyor, 5a ... 1st belt conveyor, 5b ... 2nd belt conveyor, 6 ... Temporary storage, 7 ... Fresh water tank, 8 ... High pressure washer, 9 ... Compressor, 11a. 11b: connecting member for anchoring, 12 ... winch, 13 ... sand plast device, 14 ... sand storage place, 15 ... year tank, 16 ... generator room, 17 ... warehouse, 18 ... rest area, 19 ... site management office , 20 ... fender, 21 ... stay, 21a ... tip side member, 21b ... base side member, 22 ... roller, 30 ... box body, 31 ... bottom plate part, 32 ... rear plate part, 33 ... side plate part, 34 ... floor body 35 ... Drain pump, 36 ... Connecting member, 37 ... Locking portion, 38 ... Locking portion, 41 ... Rail for movement, 42 ... Handling tower, 43 ... Horizontal support material, 44 ... Suspension means, 44a ... For locking Hook 45 ... crane device, 45a ... main body, 50 ... quay, 51 ... steel sheet pile structure, S ... spacing.

Claims (7)

A water stop box for repair work with an open front is brought into contact with the front face of the water stop box so as to surround a part of the steel sheet pile structure of the quay to be repaired, and a predetermined work space is secured by the water stop box. Repair method of steel sheet pile structure for repair work,
A repair work vessel comprising the water stop box for repair work and a lifting and moving device for lifting the water stop box outward from the anchor side is bred so as to maintain a predetermined distance from the quay to be repaired. And
The water stop box lifted by the lifting and moving device is brought close to the steel sheet pile structure of the quay to be repaired from the work ship side, and is lowered to a predetermined height in water from between the work ship and the quay. The front of the water box is opposed to the steel sheet pile structure, and the front of the water stop box is brought into contact with the steel sheet pile structure, and the water in the water stop box is discharged to secure a predetermined work space. Repair work to be performed,
Prepare a plurality of water stop boxes along one side of the work boat,
The plurality of water stop boxes are installed in parallel with a narrower interval than the water stop box in contact with the steel sheet pile structure, and repair work is performed for each water stop box. A steel sheet pile, wherein each water stop box is moved to a portion between the installation positions, the water stop box is placed in contact with a steel sheet pile structure, and repair work is performed for each water stop box. Repair method for structures. A water stop box for repair work with an open front is brought into contact with the front face of the water stop box so as to surround a part of the steel sheet pile structure of the quay to be repaired, and a predetermined work space is secured by the water stop box. Repair work ship for performing repair work,
A distance retaining means for projecting from at least one anchor side and retaining a predetermined distance between the anchor side and the quay wall, a bottom plate portion, a rear plate portion, and both side plate portions, and includes a drainage pump. Comprising a water stop box for the repair work of the front open type, and a lifting and moving device capable of lifting and moving the water stop box,
The lifting and moving device moves the suspended water-stopping box from the work ship side so as to approach the steel sheet pile structure of the quay to be repaired, and at a predetermined height position in the water from between the work ship and the quay. Down, provided so that the front of the water stop box faces the steel sheet pile structure ,
On the deck of the work ship, a handling tower is provided that can move along one side of the ship. As the lifting and moving device, the horizontal support material that protrudes outward from the side of the handling tower is placed on the horizontal support material. A crane apparatus movable along a support member is provided, and the water stop box is supported by two points suspended by two hooking means suspended from the main body of the crane apparatus so as to be lifted. A work ship for repairing steel sheet pile structures. A plurality of water stop boxes provided at predetermined intervals along at least one side of the work ship, and a plurality of lifting and moving devices capable of lifting and moving the plurality of water stop boxes in a two-point supported state, The work boat for repairing a steel sheet pile structure according to claim 2 , wherein the water stop box lifted by the lifting and moving device is provided so as to be able to be lifted outwardly from the heel side. The steel according to any one of claims 2 and 3 , wherein the work ship is provided with a conveyor for recovering exfoliated debris peeled and removed from the steel sheet pile structure and a temporary storage for the exfoliated debris. Work boat for repairing sheet pile structures. The work ship for repairing a steel sheet pile structure according to any one of claims 2 to 4 , wherein the work ship is equipped with a high-pressure washing device, a sandblasting device, and a compressor for repair work. The space holding means between the shore side and the quay is a fender that can hold a predetermined space by a stay having an elastic body installed at the tip protruding from the heel side and abutting against the quay. A work ship for repairing a steel sheet pile structure according to any one of claims 2 to 5 . The fender is a roller type fender in which a roller having a horizontal axis parallel to the heel side is attached to the tip of the stay, and the roller is provided so as to be able to roll up and down while in contact with the quay. A work ship for repairing a steel sheet pile structure according to claim 6 .

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