JP2018028254A - Repair method of existing canal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repair method of existing canal, when repairing an irrigation canal 03 using a sheet pile steel plate 01, capable of constructing a surface retaining wall X capable of preventing separation, breakdown, subsidence while avoiding imposing a retaining wall soil pressure to a sheet pile steel plate 01.SOLUTION: The repair method of existing canal includes the steps of: driving plural support post piles 10 at an appropriate interval at the rear side of existing retaining wall formed of sheet pile steel plates 01 (rear pile driving work); forming a through hole 3 in the existing sheet pile steel plate 01 locating at a position corresponding each of the support post piles 10, and connecting an appropriate member 5 to the support post pile 10 through the through hole 3 (connecting member disposing work); disposing a retaining wall plate 7a to cover the sheet pile steel plate surface side and connecting to connection member 5a protruding from the through hole 3 (panel disposition work); and filling the backside of the connected and disposed retaining wall plate with an appropriate filler (filling and casting work), to thereby construct the surface retaining wall.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a repair method for an existing water channel in which a retaining wall is formed of a sheet pile steel plate.

  There are known irrigation channels and drainage channels for irrigation with a structure formed by driving sheet pile steel sheets on both banks to form retaining walls and casting caps concrete on the upper end of sheet pile steel sheets. These irrigation channels need to be repaired because the sheet pile steel plate portion corrodes due to aging. In addition, even if repairing some corroded parts, it will be necessary to repair other parts as well, so a means to construct a new retaining wall on the surface side of the sheet pile steel sheet as well as the corroded part has been proposed. ing.

  Patent Document 1 (Japanese Patent Application Laid-Open No. 2014-88753) has been previously proposed by the present applicant. A panel mounting portion is provided on a reinforcing member mounted at an appropriate position on a sheet pile steel plate, and is provided below the headboard portion from the irrigation channel bottom. Mount the retaining wall plate, which is made of a thin metal plate such as FRP resin plate or thin steel plate with an appropriate width, to the panel mounting part so as to cover the surface of the existing sheet pile steel plate continuously with the adjacent retaining wall plate. A new surface retaining wall is formed by filling and placing a cement filler between the existing sheet pile steel plate and the newly provided retaining wall plate.

  In addition, a new surface support is obtained by connecting a panel to the tip of a connection bar attached to a concrete retaining wall shown in Patent Document 2 (Registered Utility Model 3201577) and filling and placing concrete between the panel and the retaining wall plate. The method of building the walls is also used for repairing the canal of sheet pile steel sheets (Stopane method, registered trademark).

Unexamined-Japanese-Patent No. 2014-88753. Registered utility model 3201577.

  Although it has been proposed and practiced to repair irrigation channels constructed with sheet pile steel plates by means of constructing a new retaining wall on the outside of the sheet pile steel plates as shown in Patent Documents 1 and 2 above. The surface retaining wall newly constructed by the above means can be said to be integrated with the sheet pile steel plate by filling concrete, but this surface retaining wall is a sandwich structure of the sheet pile steel plate and the retaining wall plate, and both Are merely connected by a connecting member attached to the sheet pile steel plate. Even if the attachment location of the connecting member is set at a location where the degree of corrosion is small, the strength of the sheet pile steel plate naturally decreases with time. For this reason, the durability against the earth pressure of the newly constructed surface retaining wall is borne by the corroded sheet pile steel plate itself, and the surface retaining wall may be peeled off due to weakening of the sheet pile steel plate.

  Therefore, the present invention proposes a new repair method for an existing water channel that constructs a new surface retaining wall that is integrated with the sheet steel plate and reduces the earth pressure load when repairing a water channel using a sheet pile steel plate.

  The repair method for an existing water channel according to claim 1 of the present invention is a repair method for an existing water channel in which a retaining wall is formed by a sheet pile steel plate, and a pillar pile is driven at an appropriate interval behind the existing retaining wall (rear pile installation work) ), A through hole for connection is drilled in the existing sheet pile steel plate at a position corresponding to each column pile, and an appropriate connection member is connected to the column pile through the connection hole (connection member placement work). A retaining wall plate is connected to the protruding connecting member so as to cover the sheet steel sheet surface side (panel installation work), and an appropriate filler is filled behind the connected retaining wall board (filling placement work), and the surface It is characterized by building a retaining wall.

  Therefore, the surface retaining wall is formed on the front surface of the retaining wall of the sheet steel sheet that has deteriorated due to corrosion, and a wall surface is formed by the retaining wall plate supported by the pillar pile via the connecting member. Since the earth pressure applied to the retaining wall of the irrigation channel is evenly dispersed by the filler and added to the retaining wall plate, it is aged with a newly constructed surface retaining wall with durability against the earth pressure. The sheet steel retaining wall will be protected. That is, the earth pressure burden on the aging sheet pile steel retaining wall is reduced (preferably almost zero).

  In the invention according to claim 2 of the present invention, in the case of the back pile installation work, in particular, the support pile is driven in contact with the headboard portion provided in the existing waterway, and the headboard portion is a beam member. Since it is supported, the pillar pile receives a back earth pressure by the support by the head portion in contact with the support force according to the driving depth.

  In addition to the invention according to claim 1 or 2, the invention according to claim 3 of the present invention is provided with a lower through hole in the sheet pile steel plate at the bottom of the existing waterway, and the sheet pile steel plate from the lower through hole location. The back surface is excavated to the bottom of the irrigation channel, an appropriate receiving support portion is constructed in the back hole, and the pile pile sheet steel plate portion is loaded with the support pile load through the receiving support portion.

  Thus, against the back side earth pressure on the side of the irrigation channel that is applied to the pillar pile, the upper part is supported by the headboard part, and the lower part is less robust to corrosion, so the sheet pile steel plate that is placed in the soil is robust. Since it is supported by the solid portion of the sheet pile steel plate through the portion (the foundation block body according to claim 4, the support block body according to claim 5, and the cast concrete according to claim 6), the column pile is more stable. Can be installed.

  Further, the invention according to claim 5 of the present invention excavates the sheet pile steel plate surface side of the lower through hole, and installs the support block body formed in the lower opening U-shape across the lower through hole (support In the invention according to claim 7, the panel provided with the connecting projection protruding into the back hole is disposed in front of the lower through hole, and the concrete is placed in the back and back holes of the panel. (Foundation construction work), the support wall and the retaining wall plate support part are constructed, and the retaining wall plate support part that bears the load of the surface retaining wall built with the construction of the receiving support part on the sheet pile steel plate It can be constructed at the same time.

  Further, the invention according to claim 8 of the present invention is the foundation construction work of the invention according to claim 7, wherein the receiving support portion and the retaining wall plate support portion are constructed by placing the concrete through the lower through hole. In addition, the connecting member connected to the pillar pile and the panel are connected, and the panel becomes the lowermost retaining wall plate. At the same time as the construction of the receiving support portion and the retaining wall plate support portion, the connecting member arrangement work of the lowermost panel portion And panel installation work.

  Further, the invention according to claim 9 of the present invention is particularly effective when the retaining wall plate support portion construction work as in the inventions of claims 5 and 7 is not carried out, particularly before the retaining wall plate connection arrangement (panel installation work). A suitable support pile is driven into the bottom of the irrigation channel at an appropriate interval along the surface of the sheet pile steel plate before (loading pile driving work), and the load of the surface retaining wall to be constructed is made.

  In the invention according to claim 10 of the present invention, in particular, the filler is a cement-type filler. As the filler, the generated soil and crushed stone are optional, but when the cement-based filler is used as the filler, the retaining wall plate will function as a concrete formwork, and the sheet pile will have an anticorrosive effect due to the alkaline action of the cement. Aging (corrosion progress) of the steel sheet can be stopped.

  The invention according to claim 11 of the present invention employs a concrete panel as the retaining wall plate, and a new retaining wall of the concrete wall surface is constructed.

  Further, in the invention according to claim 12 of the present invention, following the filling of the filler into the back of the retaining wall plate, an upper panel for closing the space between the top of the retaining wall plate and the headboard portion of the existing water channel is disposed, The upper panel installation work is performed by filling the back surface of the upper panel with a filler, and the entire surface of the existing sheet pile steel plate exposed by the new surface retaining wall is covered.

  In the invention according to claim 13 of the present invention, when the connecting member is connected to the support pile (connecting member arranging work), the excavation hole is formed by removing the soil between the connecting through hole and the support pile. Therefore, the connecting operation between the connecting member and the support pile can be easily and reliably performed.

  Further, in the invention according to claim 14 of the present invention, the drilling hole is formed by driving a collapse preventing pipe into the connecting through hole formed in the existing sheet pile steel plate and removing the soil in the pipe. Therefore, when the connecting member is connected to the support pile, the collapse of the earth and sand is prevented.

  The invention according to claim 15 of the present invention comprises a connecting member that supports a recumbent on the sheet pile steel plate surface side, and a retaining wall plate is mounted on the recumbent surface. The desired position in can be selected.

  The construction method of the present invention is as described above, and the retaining wall plate which is the wall surface of the new retaining wall formed on the surface of the sheet pile steel plate is supported by the pillar pile driven behind the irrigation channel, and the back surface of the retaining wall plate is appropriately filled A new surface retaining wall is constructed by filling the material, and the construction is performed efficiently, and the constructed surface retaining wall is prevented from separating from the sheet pile steel plate, and earth pressure applied to the retaining wall is reduced. It will be borne by the new retaining wall, and its durability will be enhanced.

Cross section of the canal before construction subject to the construction of the present invention method (before construction). Explanatory drawing of the work process (back pile installation work and receiving pile driving work) of embodiment of this invention construction method. In the same figure (connecting member arrangement work), (a) is a sectional view (b) is a front view. The figure (bottom maintenance work and panel installation work). In this figure (concrete filling and placing work), (a) is a sectional view (b) is a front view. The figure (after construction). Explanatory drawing of the same pillar pile and another example of a connection member. Another example of the panel installation work. It is another figure of the concrete filling placement work, (a) is a sectional view (b) is a front view. Explanatory drawing of the foundation block body installation work (receiving support part construction work) before the back pile installation work (sheet pile back side excavation). Explanatory drawing of the back pile installation work at the time of performing the foundation block body installation work. Figure after the construction. Explanatory drawing before the support block body installation work (simultaneous construction of the receiving support part construction work and the retaining wall plate support part construction work) before the back pile installation work (sheet pile front and back excavation). Explanatory drawing of the other example of a back pile installation work at the time of performing the support block body installation work, and a connection member arrangement | positioning work. Figure after the construction. Illustration of the foundation construction work (casing installation before the back pile installation work). Fig. (Back pile installation work). The same figure (before foundation concrete placement). Figure (after foundation construction work). The same figure (after surface retaining wall construction).

  The irrigation channel to be repaired to which the present invention construction method is applied, the sheet pile steel sheet 01 is driven into the ground (bottom of the irrigation channel) 02 to receive the back pressure (back ground pressure) from both banks to secure the channel 03, and the sheet pile steel plate 01 A irrigation channel is constructed by providing a headboard portion 04 at the upper edge of the water channel. In addition, the headboard part 04 has a water channel in which a beam member 05 is installed between opposing headboards in order to increase the earth pressure durability.

  The construction method of the present invention shown as an embodiment is to construct a new surface retaining wall X on the surface of the sheet pile steel sheet 01 of the existing water channel, and the construction is basically performed by driving the pillar pile 10 into place. Pile installation work, connecting member placement work to provide connecting members (5, 5a, 5b, 5c) to connect the surface retaining walls (retaining wall plates 7, 7a, 7b) with the pillar piles 10, panel installation to install the surface retaining walls The construction is performed in the order of filling and placing the concrete 8 and 8a behind the retaining wall plates 7, 7a and 7b connected and arranged.

  Further, in addition to the basic works described above, the receiving pile driving work for the construction of the retaining wall plate support that receives the load of the surface retaining wall X to be constructed, the back surface earth pressure applied to the column pile 10 is used as the bottom surface of the water channel No. 02 foundation block body installation work for constructing a receiving support part to be borne on buried sheet pile steel sheet 01a, and further, a support block body installation work and foundation construction work for constructing both retaining wall plate support part and receiving support part Etc. are selectively performed, and a bottom surface maintenance work is performed to maintain the irrigation channel bottom surface 02 of the water channel 03 as necessary.

  In addition, each of the above-mentioned works is to appropriately divide the work zone according to the length of the surface retaining wall X to be constructed, or to carry out each work that should be partially preceded.

  Next, details of each work will be described. The basic back pile installation work is simply to drive the predetermined strut pile 10 behind the existing retaining wall at an appropriate interval, and the driving depth and interval are the environment of the irrigation channel (the presence or absence of the beam member 05 and its interval, The ground pile strength is determined at least deeper than the bottom surface 02 of the irrigation channel, and when the beam member 05 is present, the pillar pile 10 is brought into contact with the back surface of the headboard portion 04. It is preferable to drive in such a manner.

  The pillar pile 10 is made of, for example, C steel (which standard material is adopted depending on the irrigation channel environment) and includes a connecting portion 101 corresponding to a connecting member 5 described later. For example, a vertically long rectangular hole corresponding to a locking projection 52 of the connecting member 5 described later is provided at a predetermined position on the front surface of C steel (corresponding position of the excavation hole C after driving the pillar pile 10).

  Prior to driving the pillar pile 10, as shown in FIGS. 10 to 16, the foundation block body 11 such as a concrete block or the support block body 12 is previously installed on the buried sheet pile steel plate 01 a below the bottom of the irrigation channel (ground) 02. You may make it perform the installation work of a block body. Alternatively, as shown in FIGS. 17 to 20, a foundation construction work including a back pile installation work for installing the support pile 10 may be performed.

  The case where the foundation block body installation work is adopted will be described. The foundation block body 11 to be used has a shape in which the vertical surface (circumferential surface) of the concrete portion coincides with the uneven step of the sheet pile steel plate 01 or in the uneven step of the sheet pile steel plate 01. The left and right widths are set so that the front and rear widths correspond to the back pile installation work described later.

  And the lower through-hole 13 is drilled in the sheet pile steel plate 01 at the bottom of the existing water channel, and the back surface A is formed by excavating the back surface of the sheet steel plate 01 from the position of the lower through-hole 13 to the bottom of the water channel (FIG. 10). . In this back hole A, the basic block body 11 is placed in contact with the back side of the buried sheet pile steel plate 01a.

  After the foundation block body installation work, the above-described back pile installation work for driving the pillar pile 10 is carried out. In particular, the pillar pile 10 is placed at its vertical position on the back surface of the headboard portion 04 and the back surface of the foundation block body 11. Install so that it touches. In particular, the base block body 11 becomes a receiving and supporting part by contacting or approaching the back side of the base block body 11 (FIG. 11).

  The back hole A is appropriately refilled, but the concrete flows into the remaining space during the concrete filling and placing, and the buried sheet pile steel plate 01a and the foundation block body 11 are integrated.

  A support block body 12 may be employed instead of the basic block body 11 described above. The support block body 12 is formed in a U-shaped lower opening, and includes a rear leg 121 and a front leg 122, and a vertical hole 123 communicating with the lower opening on the upper surface. .

  The support block body installation work excavates the water channel bottom surface 02 on the surface side of the sheet pile steel plate 01 in an appropriate range to form a front hole B, and the sheet pile steel plate 01 facing the front hole B has a lower through-hole having an appropriate height. 13a is drilled, and further, the back surface of the sheet pile steel plate 01 is excavated deeper and lower than the bottom surface 02 of the water channel from the position of the lower through hole 13a to form a back hole A1 (FIG. 13).

  The support block body 12 is installed so as to straddle the lower through hole 13a and to make the front surface of the rear leg 121 contact the back surface of the buried sheet pile steel plate 01a. Concrete is poured from the vertical hole portion 123 after the support block body 12 is installed, and the gap between the buried sheet pile steel plate 01a and the support block body 12 is filled with concrete, so that the buried sheet pile steel plate 01a and the support block body 12 are integrated.

  After finishing the support block body installation work, a back pile installation work for driving the support pile 10 is performed. This back pile installation work is carried out in the same manner as when the foundation block body 11 is adopted (FIG. 14), and the rear leg 121 of the support block body 12 is interposed between the pillar pile 10 and the buried sheet pile steel plate 01a. The receiving support part is configured. Moreover, the upper surface of the support block body 12 integrated with the buried sheet pile steel plate 01a becomes the retaining wall plate support portion.

  The back hole A1 and the front hole B are appropriately refilled, but even if there is a remaining space, the concrete flows into the bottom surface maintenance work or the concrete filling and placing work described later, and the sheet pile steel plate 01 and the support block body 12 are integrated. Is made.

  In place of the above-described foundation block body installation work and support block body installation work, a foundation construction work for constructing a foundation portion having a receiving support portion and a retaining wall plate support portion by concrete placement may be employed.

  Like the support block body installation work, the foundation construction work excavates and forms the front hole B1, drills the lower through hole 13b in the sheet pile steel plate 01 from the position of the front hole B1, and starts from the position of the lower through hole 13b. The back surface of the sheet pile steel plate 01 is excavated to the bottom of the irrigation channel to form a back hole A2.

  After the predetermined excavation, the installation of the casing, the back pile installation work for driving the column piles 10, the maintenance of the foundation of the bottom of the water channel in front of the sheet pile steel plate 01, the formwork panel (also serves as the lowermost part of the surface retaining wall plate) ) 7c is arranged in the order of foundation placement to fill concrete.

  The casing installation uses, for example, a split casing formed by combining the upper casing 14a of the lower opening U-shaped plate and the lower casing 14b of the upper opening U-shaped plate. Expand downward in hole A2.

  Back pile installation work is performed after casing installation. It is desirable that the strut pile 10 is driven in contact with the back of the divided casings 14a and 14b. However, even if the strut pile 10 is in a non-contact state, a part of the strut pile 10 only needs to be exposed in the back hole A2. The installation of the divided casings 14a and 14b is applied when the ground easily collapses, and the casing installation is not necessarily performed.

  In the maintenance of the foundation on the bottom of the water channel, the excavation groove is formed in the entire length of the foundation construction along the front surface of the sheet pile steel plate 01 simultaneously with the excavation of the front hole B1, and the crushed stone 20 is laid in the excavation groove. The foot steel material 21 or the reinforcing bar is arranged along the front surface of the sheet pile steel plate 01.

  The formwork panel 7c has a support member 77 of an appropriate length protruding from the back surface of the panel plate 76. The panel plate 76 serves as a surface of a newly constructed retaining wall. It is preferable to use the same material as the retaining wall plate 7 used in the above, and a metal plate or a plastic plate may be used, but a concrete panel is optimal. Further, the panel plate 76 is formed with a connecting hole 78 for connecting the connecting member 5c.

  For the formwork panel installation, the connecting member 5c is connected to the column pile 10 in advance through the space of the back hole A2, the panel plate 76 is placed on the foot steel member 21, and the connecting member 5c is inserted into the connecting hole 78. Then, the panel plate 76 is fixed by a fixing nut (front and back arrangement) 56. When the panel plate 76 is fixed, the support member 77 passes through the lower through hole 13b and is located in a space surrounded by the upper and lower casings 14a and 14b.

  Next, when concrete 8a is filled and placed behind the formwork panel (lowermost retaining wall plate) 7c, the formwork panel (including the upper and lower casings 14a and 14b, the column pile 10, the connecting member 5c, and the support member 77). The foundation Y in which the lowermost retaining wall plate) 7c is integrated is constructed.

  When the support block body installation work and the foundation construction work are performed, the connecting member placement work, the panel setting work, and the filling placement work are performed, and the receiving pile driving work is performed except the above, and then the connection member. Arrangement work, panel installation work, filling placement work.

  When the retaining wall plate support portion is not constructed as in the above-described support block body installation work or foundation construction work, the retaining wall plate support portion is constructed by driving the support pile 2 (receiving pile placing work). The receiving pile driving work is made by driving the support pile 2 having corrosion resistance such as pine piles into the bottom face 02 of the irrigation channel along the surface (the irrigation channel side) of the sheet pile steel plate 01, and the pile diameter, the pile length, and the pile spacing. Is determined in consideration of the load of the newly installed surface retaining wall X. Moreover, the level of the driving pile 2 is made to coincide with the height of the bottom surface 02 of the irrigation channel. However, when the bottom surface maintenance work described later is carried out, it is projected upward by the thickness of the discarded concrete surface 6 by the bottom surface maintenance work. Also good. In addition, the place which performed the support block body installation work can be abbreviate | omitted.

  The connecting member placement work is performed at the position where the column pile 10 is first stood and at the height position of the connecting portion 101, and the cut hole C is formed depending on the connection structure of the connecting member 5 to the column pile 10. The means for forming the excavation hole C displays the marking D at a predetermined position of the sheet pile steel plate 01 in advance, and drills the sheet pile steel plate 01 at the corresponding portion to form the connecting through hole 3. Next, the collapse prevention pipe 4 is driven into the soil behind the sheet pile steel plate 01 through the connection through hole 3, and the soil in the pipe 4 is scraped and removed to expose the connection portion 101 of the column pile 10. Hole C is formed.

  The cut-off hole C may be formed on any of the concave and convex surfaces of the sheet pile steel plate 01, but the balance is as good as possible and is arranged vertically, but the connection structure of the connection member 5 to be used and the connection bracket of the retaining wall plate 7 are used. It is determined as appropriate corresponding to the structure 71.

  Next, the connecting member 5 is passed through the cut hole C and connected to the connecting portion 101 of the column pile 10. The connecting member 5 to be used is a member having an appropriate tensile strength. For example, as shown in FIG. 3, a vertically long rectangular locking projection 52 orthogonal to the axial direction is provided at the distal end of the rod-shaped main body 51, and the proximal end Is provided with a threaded portion 53 for attaching a retaining wall plate. When this connecting member 5 is inserted into the cut hole C, inserted into the connecting portion (vertically long rectangular hole) 101 of the column pile 10 and half-rotated, the connecting member 5 is attached to prevent it from coming off, and the threaded portion 53 is attached to the surface of the sheet pile steel plate 01. It is exposed to the side.

  In addition, this connection member arrangement | positioning work is not specified to the said connection member 5, It is a member corresponding to the structure of the connection part 101 provided in the support | pillar pile 10, and the structure which can be connected with the retaining wall board 7 mentioned later As another example, as shown in FIG. 7, the connecting portion 101a may be a female screw hole portion and the connecting member 5a may be a screw rod. Furthermore, the connecting portion 101a is simply a circular hole, an anchor structure may be adopted as the connecting member, or the connecting member is a string, and is fixed to the pillar pile 10 in advance (welding or binding of wires), A structure may be adopted in which it is pulled out from the cut hole C. Further, when a connecting member such as a spiral pile shape capable of traveling in the soil is employed, it is not necessary to form the excavation hole C.

  Further, as illustrated in FIG. 14, a connecting member 5 b provided with a locking hook portion 54 at the tip is adopted, and a horizontal rod 55 laid on the surface side of the sheet pile steel plate 01 is supported (connected) by the locking hook portion 54. This horizontal bar 55 is to be mounted on the retaining wall plate 7b during panel installation work.

  The bottom surface maintenance work is carried out in order to accurately and easily install the retaining wall plate 7 in the next panel installation work when the receiving pile driving work is adopted. This bottom surface maintenance work is carried out by forming a discarded concrete surface 6 such as a simple pavement on the irrigation channel bottom surface 02 or laying a concrete plate. The said abandoned concrete surface 6 may be made to correspond with the upper surface of the support block body 12, and the top surface of the support pile 2, and may be formed so that these may be covered. The bottom surface maintenance work is not necessarily performed when the receiving pile driving work is adopted, and can be omitted.

  The panel installation work is to install the retaining wall plate 7 (7a, 7b), which is the surface coating of the surface retaining wall X (X1) and forms the form of the surface retaining wall X, at a predetermined position. A metal plate or a plastic plate may be used, but a concrete panel is preferably used.

  The retaining wall plate 7 is preliminarily provided with a connecting structure corresponding to the connecting member 5 (5a, 5b and other arbitrary structures), for example, a connecting metal fitting 71 projecting on the back surface, and the lower end edge protrudes in an L shape. An installed retaining portion 72 is provided, which connects the connecting fitting 71 and the base end side of the connecting member 5, and adjoins the retaining wall plate 7 so as to cover the surface of the sheet pile steel plate 01 with the retaining wall plate 7. 7 is continuously disposed on the concrete surface 6 or on the support block body 12 or on the foundation Y.

  That is, when the receiving pile driving work is performed, the supporting pile 2 supports the load of the retaining wall plate 7 (surface retaining wall X), and when the supporting block body installation work is performed, the retaining wall The plate 7 is positioned on the support block body 12 so as to support the load of the retaining wall plate 7 (surface retaining wall X), and when the foundation construction work is performed, the foundation constructed on the foundation Y is supported. It supports the load of the wall plate 7 (surface retaining wall X1).

  When installing the panel, as described above, the connecting metal plate 71 is not provided behind the retaining wall plate 7, but a connecting hole 73 is formed at a position corresponding to the connecting member 5 (5a) as shown in FIG. The retaining wall plate 7a and the appropriate exterior coupling fitting 74 for attaching the retaining wall plate 7a to the coupling member 5 (5a) may be employed. When such a combination is employed, the installation work of the retaining wall plate 7a can be performed from the retaining wall plate water channel side.

  Further, when the horizontal bar 55 is employed as illustrated in FIG. 14, if the retaining wall plate 7 b is hooked on the horizontal wall 55 and provided with a connecting portion 75 having other connecting means, the wall surface of the retaining wall plate 7 b is provided. The mounting position in the direction (lateral direction) can be set arbitrarily.

  In the concrete filling and placing work, concrete (cement-based filler) 8 is filled and placed behind the retaining wall plates 7 (7a, 7b) disposed on the surface of the sheet pile steel plate 01 (a gap with the sheet pile steel plate 01). Is. Furthermore, following the filling and placing behind the retaining wall plate 7 (7a, 7b), an upper panel (concrete plate) 9 is arranged to close the space between the top of the retaining wall plate 7 and the headboard portion 04 of the existing water channel, and Filling concrete 8 is filled and placed also on the back surface of the upper panel 9.

  Thus, due to the solidification of the concrete, the column pile 10 and the retaining wall plate 7 (7a, 7b) are coupled by the coupling member 5 (5a, 5b, 5c), and the sheet pile steel plate 01, the column pile 10 and the retaining wall plate 7 (7a). 7b) and a new surface retaining wall X (X1) in which the filled concrete 8 (including the basic concrete 8a) is integrated, and the repair of the irrigation channel composed of corroded sheet pile steel is realized. is there.

  In particular, the surface retaining wall X (X1) is supported by the retaining wall plate support (support pile 2, support block body 12, foundation Y), and is integrated with the buried sheet pile steel plate 01a, which is slow in corrosion progress, and has its own weight. In addition, against the backside earth pressure, the pile pile 10 is formed by the buried sheet pile steel plate 01a through the headboard 04 and the receiving support (base block body 11, support block body 12, foundation Y). Is supported, and the surface retaining wall X (X1) is connected to the pillar pile 10 by the connecting member 5 (5a,...), Thereby preventing peeling from the existing sheet pile steel plate 01 (FIG. 6). 12, FIG. 15, FIG. 20). Further, due to the anticorrosive effect of the concrete, the progress of the corrosion of the sheet pile steel plate 01 is suppressed, and when the cut hole C is formed, the cut hole C is also filled with concrete, and the connecting member 5 (5a ··) is also protected from corrosion. .

10 pillar pile 101, 101a connection part 11 foundation block body (receiving support part)
12 Support block body 121 Back leg part (receiving support part)
122 Front leg portion 123 Vertical hole portions 13, 13a, 13b Lower through holes 14a, 14b Split casing 2 Support pile (retaining wall plate support portion)
20 Crushed stone 21 Foot material 3 Connecting through hole 4 Collapse prevention pipes 5, 5 a, 5 b, 5 c Connecting member 51 Bar-shaped main body 52 Locking protrusion 53 Threaded portion 54 Locking flange portion 55 Horizontal anchor 56 Fixed nut 6 Abandoned concrete surface 7, 7a, 7b Retaining wall plate 7c Formwork panel (lowermost retaining wall plate)
71 Connecting bracket 72 Mounting portion 73, 78 Connecting hole 74 Exterior connecting bracket 75 Connecting portion 76 Panel plate 77 Support material 8, 8a Concrete (cement-based filler)
9 Upper panel A, A1, A2 Back hole B, B1 Front hole C Cut hole D Marking X, X1 Surface retaining wall Y Foundation (receiving support part, retaining wall plate support part)
01 sheet pile steel sheet 01a buried sheet pile steel sheet 02 ground (bottom of the canal)
03 Waterway 04 Kasagi part 05 Beam member

Claims (15)

  It is a repair method for an existing water channel in which a retaining wall is formed with a sheet pile steel plate, and a pillar pile is driven at an appropriate interval behind the existing retaining wall, and a through hole for connection is made in the existing sheet pile steel plate at a position corresponding to each pillar pile, An appropriate connecting member is connected to the pillar pile through the connecting through hole, and the connecting member protruding from the connecting through hole and the retaining wall plate arranged so as to cover the sheet steel plate surface side are appropriately connected and connected. A method for repairing an existing water channel, characterized in that a surface retaining wall is constructed by filling an appropriate filler behind the retaining wall plate.   The repair method for the existing water channel according to claim 1, wherein the pillar pile is driven in contact with a headboard portion provided in the existing water channel.   The sheet pile steel plate at the bottom of the existing water channel is provided with a lower through hole, the sheet pile steel plate back surface is excavated from the lower hole location to the bottom of the channel, and an appropriate receiving support portion is constructed in the rear hole. The repair method of the existing waterway of Claim 1 or 2 which bears a support | pillar pile load to an embedded sheet pile steel plate part via.   The repair method of the existing waterway of Claim 3 which becomes a foundation block body which installs a receiving support part in a back surface hole.   The bottom side of the sheet pile steel sheet is also excavated, and a support block body formed in a U-shaped lower opening is installed across the lower through hole so that the support block body becomes a receiving support part, The repair method of the existing waterway of Claim 3 used also as a wall-plate support part.   The method for repairing an existing waterway according to claim 3, wherein the receiving support part is made of concrete cast in the back hole.   A panel having a connecting projection protruding into the back hole is disposed in front of the lower through hole, and concrete is placed in the back and back holes of the panel to construct a receiving support portion and a retaining wall plate support portion. Repair method for existing waterways as described in 6.   The repair method of the existing waterway of Claim 7 which connects the connection member and panel which were connected with the said support | pillar pile, and uses a panel as a lowermost retaining wall board.   The repair of the existing water channel according to any one of claims 1 to 4 and 6, wherein an appropriate support pile is driven into the bottom surface of the water channel along the surface of the sheet pile steel plate at appropriate intervals before the retaining wall plate coupling arrangement. Construction method.   The repair method for an existing water channel according to any one of claims 1 to 9, wherein the filler is a cement-based filler.   The method for repairing an existing water channel according to any one of claims 1 to 10, wherein the retaining wall plate is a concrete panel.   Following the filling of the filling material behind the retaining wall plate, an upper panel that closes the space between the top of the retaining wall plate and the headboard portion of the existing water channel is arranged, and the back surface of the upper panel is filled with the filling material. The repair method of the existing waterway in any one of Claims 1 thru | or 11.   The method for repairing an existing water channel according to any one of claims 1 to 12, wherein when the connecting member is connected to the support pile, the soil between the connecting through hole and the support pile is removed.   14. The repair method for an existing water channel according to claim 13, wherein a pipe for preventing collapse is driven into a through hole for connection drilled in an existing sheet pile steel sheet, and a ground hole is formed by removing soil in the pipe.   The method for repairing an existing water channel according to any one of claims 1 to 14, wherein the connecting member supports a horizontal bar on the sheet pile steel plate surface side, and a retaining wall plate is mounted on the horizontal bar.