JP2018197490A - Concrete sheet pile member, earth retaining wall and method for constructing earth retaining wall - Google Patents

Abstract

To improve the appearance quality of an earth retaining wall that uses a steel material having flanges at both ends of a web as a soldier pile, and to improve the durability of the soldier pile.SOLUTION: An earth retaining wall 1 comprises a plurality of soldier piles 2 made of steel material, each of which has flanges 2b at both ends of a web 2a. A concrete sheet pile member 3, which is installed between soldier piles 2 adjacent to each other, is provided with a first protrusion 3a and a second protrusion 3b. The first protrusion 3a extends, when being installed between soldier piles 2 adjacent to each other, in a width direction W at both ends of the concrete sheet pile member 3 in the width direction so as to be positioned inside a flange 2b of a soldier pile 2. The second protrusion 3b extends, when being installed between soldier piles 2 adjacent to each other, in the width direction W in at least one of the ends of the concrete sheet pile member 3 in the width direction so as to cover the whole outside of a flange 2b of a soldier pile 2 that is not embedded in a ground and is exposed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a retaining wall which is necessary for construction such as a waterway or a road.

  When building a retaining wall with a reinforced concrete structure, concrete sheet piles are often used. However, conventional shade sheet piles have a plate-like structure up to the root where no structural strength is required, which is uneconomical. It was. In addition, the concrete volume at the basement part prevented the concrete sheet pile from being driven into the ground.

  As a construction method superior in cost and workability than the above construction method, there is a parent pile side sheet construction method as in Patent Document 1. This construction method is a construction method that constructs earth retaining walls by driving multiple master piles into the ground at intervals and stacking sheet piles between each parent pile.

JP 2009-68203 A

  The earth retaining wall constructed by the parent pile lateral sheet pile method of Patent Document 1 is in a state where the ground portion of the parent pile that is not embedded in the ground is exposed. For this reason, when the steel material which has a flange in the both ends of webs, such as H shape steel and I shape steel, is used as a main pile, a main pile will be exposed to a wind and rain etc., and a main pile will rust. Will occur. And when rust arises in a main pile, since the rust appears in the appearance of a retaining wall, the external appearance quality as a retaining wall will fall. In this case, if the earth retaining wall is a temporary one that is temporarily installed at the construction site, such rusting of the main pile will not be a big problem, but the earth retaining wall and roadside when constructing the waterway If it is a permanent retaining wall such as a retaining wall, the landscape will be damaged. In addition, if the rust of the parent pile progresses, the durability of the parent pile will be adversely affected.

  This invention is made in view of the said situation, and while improving the external appearance quality of the retaining wall which used the steel material which has a flange in the both ends of a web as a parent pile, improving the durability of a parent pile. Objective.

  The present invention for solving the above-mentioned problems is a concrete sheet pile member installed between adjacent parent piles of a retaining wall comprising a plurality of parent piles made of steel having flanges at both ends of a web. The first protrusions extending in the width direction at both ends in the width direction of the concrete sheet pile member so as to be positioned inside the flanges of the parent piles when installed between the matching parent piles, and the adjacent parent When installed between the piles, it extends in the width direction at at least one end of the widthwise ends of the concrete sheet pile member so as to cover the entire outside of the flange of the exposed parent pile that is not embedded in the ground. And a second protrusion.

  According to another aspect of the present invention, there is provided a retaining wall comprising a main pile made of steel having flanges at both ends of a web and the above-mentioned concrete sheet pile member, and the flange surface of the main pile has a retaining wall. The concrete sheet pile member has a flange on the front side of the parent pile between the first projecting portion and the second projecting portion. It is characterized by being installed between the adjacent parent piles so as to be positioned.

  Another aspect of the present invention is a method for constructing a retaining wall comprising a main pile made of steel having flanges at both ends of a web and the above-mentioned concrete sheet pile member, The surface is parallel to the width direction of the retaining wall, and a plurality of the sheet pile members are installed at intervals, and the concrete sheet pile member is disposed between the first projecting portion and the second projecting portion. The retaining wall is constructed by installing between the adjacent parent piles so that the front flange is located.

  The earth retaining wall according to the present invention covers the entire exposed portion of the parent pile not embedded in the ground with a concrete sheet pile member, so that the rust of the parent pile is not exposed to the appearance of the earth retaining wall, and the parent pile Is less exposed to wind and rain, etc., and the progress of rusting of the parent pile can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the external appearance quality of the retaining wall which uses the steel material which has a flange in the both ends of a web as a parent pile, durability of a parent pile can be improved.

It is a front view which shows schematic structure of the earth retaining wall which concerns on the 1st Embodiment of this invention. It is a side view which shows schematic structure of the earth retaining wall which concerns on the 1st Embodiment of this invention. It is AA sectional drawing in FIG. It is a figure for demonstrating the construction method of a retaining wall. It is a figure for demonstrating the construction method of a retaining wall. It is a figure for demonstrating the construction method of a retaining wall. It is a figure which shows schematic structure of the earth retaining wall which concerns on the 2nd Embodiment of this invention, and is a figure equivalent to the AA cross section in FIG. In addition, in this figure, the hatching which shows a cross section is abbreviate | omitted for convenience of description of the fastener which connects a concrete sheet pile. It is a figure which shows the modification of the 2nd Embodiment of this invention, and is a top view of a concrete sheet pile. It is a top view which shows schematic structure of the earth retaining wall which concerns on the 3rd Embodiment of this invention. It is a front view which shows schematic structure of the earth retaining wall which concerns on the 4th Embodiment of this invention. It is a side view which shows schematic structure of the earth retaining wall which concerns on the 4th Embodiment of this invention. It is a front view which shows schematic structure of the earth retaining wall which concerns on the 5th Embodiment of this invention. It is a side view which shows schematic structure of the earth retaining wall which concerns on the 5th Embodiment of this invention. It is a figure which shows the example of a shape of the 1st protrusion part of a concrete sheet pile. It is a figure which shows the example of a shape of the 1st protrusion part of a concrete sheet pile.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present specification and drawings, elements having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

<First Embodiment>
As shown in FIGS. 1 to 3, the retaining wall 1 of the first embodiment is a steel material (for example, an H-shaped steel or an I-shaped steel) having a web 2 a and flanges 2 b formed at both ends of the web 2 a. And a plurality of parent piles 2 and a concrete sheet pile 3 installed between adjacent parent piles 2. In the following description, the left side of the retaining wall 1 shown in FIG. 2 is referred to as the front side, and the right side of the retaining wall 1 shown in FIG. Similarly, in the description of the main pile 2 and the concrete sheet pile 3, the left side of FIG. 2 is referred to as the front side, and the right side of FIG. The “front side” is the side that is visually recognized as the appearance of the retaining wall 1, and the “rear side” is the side that is covered with the ground and is not visually recognized as the appearance of the retaining wall 1.

  A part of the main pile 2 is embedded in the ground such that the flange surface is parallel to the width direction W of the retaining wall 1. The remaining part of the parent pile 2 is in a state of protruding to the ground, and the plurality of parent piles 2 are arranged at intervals in such a state. The concrete sheet pile 3 is higher in height than the main pile 2 on the ground, and the concrete sheet pile 3 is installed by being fitted one by one between the parent piles 2. In the retaining wall in which the fence plates are stacked between the adjacent piles as in the conventional pile pile method, the soil is sucked out from the gap between the fence plates in the height direction, and the fence plates are easily removed. However, there is no gap in the height direction between the parent piles 2 by installing the concrete sheet pile 3 having a single sheet structure between the adjacent parent piles 2 as in the first embodiment. Suction of earth and sand on the back side of the earth retaining wall 1 can be suppressed. Thereby, the external appearance quality of the earth retaining wall 1 can be further improved. Moreover, since the concrete sheet pile 3 installed between the adjacent parent piles 2 becomes difficult to remove | deviate compared with the case where a fence board is installed between the parent piles 2, the durability as the earth retaining wall 1 improves. In addition, in the example shown in FIG. 2, although the height of the main pile 2 of a ground part is lower than the height of the concrete sheet pile 3, the height of the parent pile 2 may be the same as the height of the concrete sheet pile 3. .

  As shown in FIG. 3, the 1st protrusion part 3a extended in the width direction W located in the inner side of the flange 2b of the front side of the main pile 2 is formed in the both ends of the width direction W of the concrete sheet pile 3. As shown in FIG. . Moreover, the 2nd protrusion part 3b extended in the width direction W so that the outer side of the flange 2b of the front side of the parent pile 2 might be covered in one edge part of the both ends of the width direction W of the concrete sheet pile 3 Is formed. Since the first projecting portion 3a and the second projecting portion 3b are formed at one end in the width direction of the concrete sheet pile 3, a groove exists between the projecting portions 3a and 3b.

  The concrete sheet pile 3 is attached by being fitted in a state in which the first protruding portion 3a is caught inside the flange 2b of the parent pile 2 as in the conventional parent pile horizontal sheet pile method. By being attached in this way, the concrete sheet pile 3 is prevented from falling forward of the retaining wall 1. The width of the second projecting portion 3b of the concrete sheet pile 3 is longer than the length of the flange 2b of the main pile 2 so that the flange 2b of the main pile 2 on the front side of the earth retaining wall 1 can be obtained. The whole is covered. The base portion (the portion below the front side ground surface GL1 in FIG. 2) of the main pile 2 of the retaining wall 1 is covered with the ground on the front side and the ground on the rear side of the retaining wall 1. The ground portion of the pile 2 is covered only with the ground on the back side. That is, when the 2nd protrusion part 3b of the concrete sheet pile 3 shown in FIG. 3 does not exist, the flange 2b of the front side of the ground part of the main pile 2 will be in the exposed state. On the other hand, the retaining wall 1 of the first embodiment has such a shape that the second projecting portion 3b of the concrete sheet pile 3 shown in FIG. When the wall 1 is constructed, the parent pile 2 cannot be seen from the outside of the retaining wall 1.

  Moreover, as shown in FIG. 3, in 1st Embodiment, between the main pile 2 and the 1st 1st protrusion part 3a of the 1st protrusion parts 3a of the width direction both ends of the concrete sheet pile 3 are provided. A gap 4 for absorbing construction errors in the width direction W of the parent pile 2 is formed. For example, even if the parent pile 2 is designed to be installed at equal intervals, the actual distance between the design of the parent pile 2 and the actual installation was set according to the ground condition and the level of proficiency of the installer during actual construction. An error may occur in the interval between the parent piles 2. When such an error occurs, if there is no extra gap between the parent pile 2 and the concrete sheet pile 3, the concrete sheet pile 3 hits the parent pile 2, and the concrete sheet pile 3 is placed between each parent pile 2. There is a possibility that it cannot be installed smoothly. For this reason, it is preferable that the concrete sheet pile 3 is formed so that the clearance gap 4 for absorbing the construction error of the width direction W of the parent pile 2 may be provided between the parent pile 2 and the concrete sheet pile 3. As a result, even if a construction error in the width direction W of the main pile 2 occurs during actual construction, the concrete sheet pile 3 can be installed smoothly between the adjacent parent piles 2 and the workability is improved. . In the first embodiment, the gap 4 is provided between the parent pile 2 and one first projecting portion 3a of the concrete sheet pile 3. However, the first projecting portion 3a on the other side and the parent pile are provided. A gap 4 may be further provided between the two. That is, from the viewpoint of improving workability, the gap 4 for absorbing construction errors in the width direction W of the parent pile 2 is different from the parent pile 2 and the concrete sheet pile 3 regardless of the shape of the parent pile 2 and the concrete sheet pile 3. The concrete sheet pile 3 should just be formed so that it may be provided between.

  The earth retaining wall 1 as described above is constructed as follows, for example.

  First, as shown in FIG. 4, a cross-beam-shaped formwork 10 having a plurality of members extending linearly is temporarily installed in a region where the main pile 2 and the concrete sheet pile 3 are installed. Each member which comprises the mold 10 consists of steel materials, such as H-shaped steel, for example, and each positional relationship is fixed because each mold component is embedded in the ground or mutually connected. . In the present embodiment, the mold 10 is configured by the four H-section steels 11 partially embedded in the ground and the remaining part projecting to the ground to restrain the positions of the other mold-constituting members fixed to each other. Has been. There is no particular limitation on the method of connecting the respective formwork component members, but they are connected using various narrow fasteners and fasteners.

  In the present specification, a direction perpendicular to the width direction W in plan view is referred to as a vertical direction V, and a pair of formwork components 12a and 12b whose longitudinal direction is fixed in the width direction W Or the vertical direction restraint jig | tool 12 which restrains the position in the vertical direction of the concrete sheet pile 3 is called. The distance between the pair of formwork constituting members 12 a and 12 b constituting the vertical direction restraining jig 12 is appropriately changed according to the size of the parent pile 2 and the concrete sheet pile 3. In addition, the pair of formwork constituent members 13a and 13b, which are arranged so as to straddle the vertical restraining jig 12 and whose longitudinal direction is fixed in the vertical direction V, restrain the position of the main pile 2 in the width direction W. This is referred to as a width direction restraining jig 13. The distance between the pair of formwork constituting members 13 a and 13 b constituting the width direction restraining jig 13 is the same as the length in the width direction of the flange 2 b surface of the parent pile 2. In the example shown in FIG. 4, three width direction restraining jigs 13 are provided at intervals, but the number of width direction restraining jigs 13 is the number of parent piles 2 installed in one mold 10. It is changed appropriately according to.

  After assembling the mold 10 shown in FIG. 4, the parent pile 2 is installed in an area surrounded by the vertical direction restraining jig 12 and the width direction restraining jig 13 as shown in FIG. 5. Here, a part of the parent pile 2 is embedded in the ground in a state where the flange 2b surface is parallel to the width direction W, and the remaining portion is projected to the ground. Moreover, in this embodiment, since the space | interval of a pair of form-frame structural members 13a and 13b which comprises the width direction restraint jig | tool 13 is the same length as the width direction length of the flange 2b surface of the main pile 2. When the parent pile 2 is embedded in the ground, the position in the width direction W of the parent pile 2 can be restricted. Thereby, the position accuracy in the width direction W of the parent pile 2 can be improved.

  In the present embodiment, a spacer 14 having the same thickness as that of the second projecting portion 3b of the concrete sheet pile 3 is provided in a region surrounded by the vertical direction restraining jig 12 and the width direction restraining jig 13. The spacers 14 are arranged so as to be in contact with the front-side mold form constituting member 12b of the pair of form form constituting members 12a and 12b of the vertical direction restraining jig 12. Thereby, the distance between the formwork component 12a on the back side of the vertical direction restraining jig 12 and the spacer 14 is the same length as the distance between the pair of flanges 2b of the parent pile 2, When embedding in the ground, the position of the parent pile 2 in the vertical direction V can be constrained. Even if the spacer 14 is not provided, the positional accuracy of the main pile 2 in the vertical direction V can be obtained by embedding it in the ground while applying the main pile 2 to the formwork component 12a on the back side of the vertical restraining jig 12. It is possible to improve. However, in order to further improve the positional accuracy of the main pile 2 in the vertical direction V, it is preferable to provide the spacer 14 as in this embodiment. Moreover, the space | interval of a pair of formwork structural members 12a and 12b of the vertical direction restraint jig | tool 12 may be changed by reassembling suitably the formwork 10 in the step which installs the parent pile 2, and the step which installs the concrete sheet pile 3. However, by providing the spacer 14, it is possible to omit the reassembly work of the mold 10.

  After the installation of the main pile 2, as shown in FIG. 6, the width direction restraining jig 13 is disassembled, and the concrete sheet piles 3 lifted by the crane are installed one by one between the adjacent main piles 2. At this time, the first protrusion 3 a of the concrete sheet pile 3 is positioned inside the flange 2 b on the front side of the parent pile 2, and the second protrusion 3 b of the concrete sheet pile 3 is on the front side of the parent pile 2. The concrete sheet pile 3 is lowered by adjusting the direction of the concrete sheet pile 3 so as to be positioned outside the flange 2b. In the present embodiment, the second protrusion 3b is positioned in the gap between the parent pile 2 that has already been installed and the front-side formwork component 12b that constitutes the vertical direction restraining jig 12. By lowering the concrete sheet pile 3, the concrete sheet pile 3 can be installed while restraining the position of the concrete sheet pile 3 in the vertical direction V. In addition, in order to improve the position accuracy in the vertical direction V of the concrete sheet pile 3, it is preferable that the guide member 20 is provided in the parent pile 2 as shown in FIG. 9 mentioned later.

  After the concrete sheet pile 3 is installed in the mold 10, the mold 10 is disassembled. Then, along the width direction W of the earth retaining wall 1, the installation of the formwork 10, the installation of the parent pile 2, the installation of the concrete sheet pile 3, and the disassembly of the formwork 10 are repeated to construct the earth retaining wall 1. In the example shown in FIGS. 4 to 6, two concrete sheet piles 3 are installed in the mold 10, but the number of concrete sheet piles 3 installed in the mold 10 is not particularly limited. It may be 8-10 sheets. Moreover, the construction method of the retaining wall 1 is not limited to the above method. For example, the configuration of the mold 10 is not limited to that described in the present embodiment, and the position of the parent pile 2 in the width direction W and the vertical direction V is constrained, and the position of the concrete sheet pile 3 in the vertical direction V is constrained. Any configuration is possible. By using such a mold 10, the positional accuracy of the main pile 2 and the concrete sheet pile 3 can be improved, but the retaining wall 1 can be constructed without providing the mold 10. Moreover, it does not specifically limit about the specific means at the time of embedding the parent pile 2 and the concrete sheet pile 3 either. For example, the main pile 2 and the concrete sheet pile 3 may be driven into the ground, or the ground is excavated in advance, and after placing the parent pile 2 and the concrete sheet pile 3 at a predetermined position, the surrounding ground is backfilled. Good.

  According to the retaining wall 1 of the first embodiment described above, the exposed portion of the parent pile 2 in the ground portion that is not embedded in the ground, that is, the outer side of the flange 2b on the front side of the parent pile 2 is the first of the concrete sheet pile 3. 2, even if the main pile 2 is rusted, the rust cannot be visually recognized from the outside of the retaining wall 1. For this reason, after the construction of the retaining wall 1, the appearance of the retaining wall 1 can be maintained even after a long time has passed, and the appearance quality can be improved as compared with the retaining wall 1 of the conventional parent pile sheet pile method. it can. Moreover, according to the retaining wall 1 of 1st Embodiment, since the parent pile 2 becomes difficult to be exposed to a wind and rain etc. with respect to the conventional retaining wall 1, the parent pile 2 can be made hard to rust.

<Second Embodiment>
The retaining wall 1 of the second embodiment shown in FIG. 7 is obtained by connecting the concrete sheet piles 3 adjacent to the retaining wall 1 of the first embodiment with fasteners 5 (for example, bolts and nuts). Thereby, even when an earthquake or the like occurs, the function as the retaining wall 1 is easily maintained. In the example shown in FIG. 7, bolts and nuts are used as the fasteners 5, and the adjacent concrete sheet piles 3 are connected by passing the bolts in the width direction W through the first projecting portions 3 a of the adjacent concrete sheet piles 3. Yes. In the example shown in FIG. 7, the width direction both ends of the concrete sheet pile 3 are thicker than the width direction center part, and it becomes easy to pass the bolt from the width direction W to the 1st protrusion part 3a formed in the width direction both ends. ing.

  In addition, the fastener 5 is not specifically limited, Although it does not specifically limit about how each concrete sheet pile 3 is connected using the fastener 5, The method that a through-hole is not formed in the front side of the concrete sheet pile 3 It is preferable to connect with. For example, when a bolt is used as the fastener 5 as shown in FIG. 7, if the bolt is passed in a direction perpendicular to the width direction W in a plan view, a hole penetrating from the front side of the concrete sheet pile 3 toward the back side (non- Need to be formed. In that case, when the earth retaining wall 1 is exposed to wind and rain, or when the earth retaining wall 1 is used as a water channel, water may enter from the through hole of the concrete sheet pile 3 and the parent pile 2 may be easily rusted. Therefore, when a bolt is used as the fastener 5, it is preferable to connect the concrete sheet pile 3 so as to pass the bolt in the width direction W. In addition, in the example shown in FIG. 7, the bolt is passed through the web 2 a of the parent pile 2, but the concrete adjacent by passing the bolt through the head of the concrete sheet pile 3 at a position higher than the upper end of the parent pile 2. The sheet pile 3 may be connected.

  Moreover, you may connect the concrete sheet pile 3 which adjoins through a volt | bolt so that it may pass along the 2nd protrusion part 3b of the concrete sheet pile 3 like FIG. In the example shown in FIG. 8, a hole (not shown) having a depth in the width direction W is formed on the end surface in the width direction of the second protrusion 3 b of the concrete sheet pile 3, and the second of the adjacent concrete sheet pile 3 is the second. A similar hole (not shown) is also formed in the end surface in the width direction of the opposite portion of the protruding portion 3b. Each hole is formed at the same height. Moreover, the work hole 6 for the bolting operation | work is formed in the upper surface of each concrete sheet pile 3, and the work hole 6 has a magnitude | size which can insert a tool and the operator's hand. Yes. When connecting such a concrete sheet pile 3, a bolt is first inserted in the hole of the 2nd protrusion part 3b of the concrete sheet pile 3 to install, and the concrete sheet pile 3 of the state is installed between the adjacent parent piles 2. FIG. . At this time, the bolt is prevented from protruding from the end face in the width direction of the concrete sheet pile 3. Then, the adjacent concrete sheet pile 3 is installed. Then, the bolt is passed through the hole of the adjacent concrete sheet pile 3 through the work hole 6 and fastened with a nut. Thereby, the adjacent concrete sheet piles 3 are connected.

<Third Embodiment>
In the retaining wall 1 of the third embodiment shown in FIG. 9, a guide member 20 is provided on the web 2 a of the parent pile 2 so as to be in contact with the surface on the back side of the first protruding portion 3 a of the concrete sheet pile 3. The guide member 20 has a shape protruding in the width direction W from the web 2a of the parent pile 2, and the distance between the protruding portion of the guide member 20 and the flange 2b on the front side of the parent pile 2 is the concrete sheet pile 3 The thickness is equal to the thickness of the first protrusion 3a. For this reason, when installing the concrete sheet pile 3, the first projecting portion 3 a is embedded in the ground in such a state that the first projecting portion 3 a is inserted between the guide member 20 and the flange 2 b on the front side of the parent pile 2. To go. Thereby, when embedding the concrete sheet pile 3 in the ground, it is possible to restrain the position of the concrete sheet pile 3 in the vertical direction V and to prevent the concrete sheet pile 3 from falling to the back side.

  In addition, the guide member 20 consists of steel materials, for example. In the example shown in FIG. 9, L-shaped angle steel (angle) is used as the guide member 20, but the shape of the guide member 20 is not particularly limited. Moreover, the guide member 20 may be fixed to the parent pile 2 by welding, for example, at the construction site of the retaining wall 1, or is fixed to the parent pile 2 in advance before the parent pile 2 is carried into the construction site. May be.

<Fourth Embodiment>
The earth retaining wall 1 according to the fourth embodiment shown in FIGS. 10 and 11 is provided with a pressure receiving plate 7 for receiving a passive earth pressure at the root of the main pile 2. The pressure receiving plate 7 is longer in the width direction W than the parent pile 2. By providing such a pressure receiving plate 7, the earth retaining wall 1 becomes more robust, and the function as the earth retaining wall 1 can be maintained even when the rear earth pressure increases. Moreover, when the pressure receiving plate 7 is attached to each parent pile 2 at the same position, the concrete sheet pile 3 is lowered so as to be in contact with the upper end of the pressure receiving plate 7, thereby easily positioning the concrete sheet pile 3. Can be performed. In addition, although the pressure receiving plate 7 is attached to the parent pile 2 by welding, for example, the attachment method to the parent pile 2 is not particularly limited. The pressure receiving plate 7 is not limited to a plate-like member, and may be a member having a surface for receiving a passive earth pressure.

<Fifth Embodiment>
The earth retaining wall 1 of the fifth embodiment shown in FIGS. 12 and 13 is provided with a cap concrete block 30 at the upper end of the concrete sheet pile 3. The lower end of the concrete block 30 is placed on the upper end of the parent pile 2. Since the main pile 2 and the concrete sheet pile 3 may be displaced independently until the installed earth retaining wall 1 is adapted to the ground, both the main pile 2 and the concrete sheet pile 3 are connected by, for example, a shade concrete block. Then, a load is generated on the shaded concrete block at the time of displacement, which may cause cracks and the like. On the other hand, the cap concrete block 30 is provided so that the position of the upper end of the concrete sheet pile 3 is made higher than the position of the upper end of the parent pile 2 and the upper end of the concrete sheet pile 3 is covered as in the fifth embodiment. The parent pile 2 and the concrete sheet pile 3 can be prevented from being connected, and the occurrence of cracks and the like can be suppressed.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this example. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

  For example, a water-swellable sealing material (not shown) may be provided between the parent pile 2 and the concrete sheet pile 3. Thereby, the suction of the earth and sand at the back side of the earth retaining wall 1 can be suppressed. When providing a water expansible sealing material, it is preferable to provide between the flange 2b of the front side of the parent pile 2, and the 2nd protrusion part 3b of the concrete sheet pile 3. FIG. Moreover, a bag body (not shown) may be provided between the parent pile 2 and the concrete sheet pile 3 at the time of construction, and a grout material may be injected into the bag body after the concrete sheet pile 3 is installed. Also in this case, the suction of the earth and sand on the back side of the earth retaining wall 1 can be suppressed. When providing a bag body, it is preferable to provide between the flange 2b of the front side of the parent pile 2, and the 2nd protrusion part 3b of the concrete sheet pile 3. FIG. In addition, when providing a bag body, cover the bag body with a protective material such as steel or resin so that the bag body will not be damaged during construction, and put the protective material at the stage of injecting the grout material. You may make it pull out.

  Moreover, the shape of the concrete sheet pile 3 is not limited to what was demonstrated in the said 1st-5th embodiment. For example, in the first to fifth embodiments, the entire concrete sheet pile 3 is made of concrete. However, as shown in FIG. 14, the first protruding portion 3a of the concrete sheet pile 3 is not concrete, such as steel. You may be comprised with the other member. In the example shown in FIG. 14, the 1st protrusion part 3a is comprised by fixing the L-shaped angle steel (angle) to the main body of the concrete sheet pile 3 with a volt | bolt etc. As shown in FIG. For example, as shown in FIG. 15, the 1st protrusion part 3a may be comprised because flat steel is fixed to the main body of the concrete sheet pile 3 with a volt | bolt. That is, if the 1st protrusion part 3a is comprised so that it may be located inside the flange 2b of the parent pile 2, the structure of the 1st protrusion part 3a will not be specifically limited. Moreover, in FIG. 14 and FIG. 15, although one 1st protrusion part 3a is comprised with the steel material among the two 1st protrusion parts 3a formed in the width direction both ends of the concrete sheet pile 3. Although FIG. Both the 1st protrusion parts 3a may be comprised with steel materials. In other words, at least one of the first protrusions 3a formed at both ends in the width direction of the concrete sheet pile 3 may be made of a steel material.

  Moreover, in the said 1st-5th embodiment, although the 2nd protrusion part 3b which covers the whole exposed part of the main pile 2 was provided only in the one side of the width direction W of the concrete sheet pile 3, for example, both sides of the width direction W You may provide the 2nd protrusion part 3b in this. Here, when the concrete sheet pile in which the 2nd protrusion part 3b was formed in the both sides of the width direction W is called a 1st concrete sheet pile, it is parent to the 2nd concrete sheet pile installed next to the 1st concrete sheet pile. Only the 1st protrusion part 3a hooked inside the flange 2b of the pile 2 should just be formed. By doing so, the retaining wall 1 can be constructed by alternately installing the first concrete sheet pile and the second concrete sheet pile between the adjacent parent piles 2.

  In any case, the appearance quality and durability of the retaining wall 1 can be improved as long as the concrete sheet pile 3 covers the entire exposed portion of the parent pile 2 in the ground portion that is not embedded in the ground. . In addition, the concrete sheet pile member installed between the adjacent parent piles 2 is not limited to a plate-shaped member.

  The present invention can be applied to earth retaining walls required for construction such as waterways and roads.

DESCRIPTION OF SYMBOLS 1 Earth retaining wall 2 Parent pile 2a Web 2b Flange 3 Concrete sheet pile 3a 1st protrusion part 3b 2nd protrusion part 4 Crevice 5 Fastener 6 Work hole 7 Pressure receiving plate 10 Form 11 H-section steel 12 Vertical direction restraint jig 12a Formwork constituent member 12b Formwork constituent member 13 Width direction restraint jig 13a Formwork constituent member 13b Formwork constituent member 14 Spacer 20 Guide member 30 Shade concrete block GL1 Ground side front surface ground surface GL2 Back surface of earth retaining wall Side surface V Direction perpendicular to the width direction in plan view W Width direction

Claims (16)

A concrete sheet pile member installed between adjacent parent piles of a retaining wall comprising a plurality of parent piles made of steel having flanges at both ends of the web,
A first protrusion extending in the width direction at both ends in the width direction of the concrete sheet pile member so as to be positioned inside the flange of the parent pile when installed between the adjacent parent piles;
At the end of at least one of both ends in the width direction of the concrete sheet pile member so as to cover the entire outside of the exposed flange of the parent pile that is not embedded in the ground when installed between the adjacent parent piles A concrete sheet pile member having a second protrusion extending in the width direction.   The concrete sheet pile member according to claim 1, wherein at least one of the first projecting portions formed at both ends in the width direction of the concrete sheet pile member is made of a steel material.   The concrete sheet pile member according to claim 1 or 2, wherein the concrete sheet pile member has a shape in which a gap for absorbing a construction error in a width direction of the parent pile is provided between the parent pile and the concrete sheet pile member. A retaining wall comprising a parent pile made of steel having flanges at both ends of the web, and the concrete sheet pile member according to any one of claims 1 to 3,
A plurality of the parent piles are installed at intervals in a direction in which the flange surface is parallel to the width direction of the retaining wall,
The concrete sheet pile member is installed between the adjacent parent piles such that a flange on the front side of the parent pile is positioned between the first protruding portion and the second protruding portion. wall.   The earth retaining wall according to claim 4, wherein the adjacent concrete sheet pile members are connected by a fastener.   The earth retaining wall according to claim 4 or 5, wherein a guide member that is in contact with a surface on a back surface side of the first protrusion is provided on the web of the parent pile.   The earth retaining wall according to any one of claims 4 to 6, wherein a pressure receiving member for receiving a passive earth pressure is provided at a lower end of the concrete sheet pile member of the base pile.   The earth retaining wall according to any one of claims 4 to 7, wherein a water-expandable sealing material is provided between the parent pile and the concrete sheet pile member.   The earth retaining wall according to any one of claims 4 to 7, wherein a bag body into which a grout material is injected is provided between the parent pile and the concrete sheet pile member. It is the construction method of the earth retaining wall provided with the parent pile which consists of steel materials which have a flange in the both ends of a web, and the concrete sheet pile member as described in any one of Claims 1-3,
A plurality of the above-mentioned parent piles are installed at intervals with the flange surface being parallel to the width direction of the retaining wall,
The earth retaining wall by installing the concrete sheet pile member between the adjacent parent piles so that the flange on the front side of the parent pile is located between the first protruding portion and the second protruding portion. How to build a retaining wall. Using a cross-shaped formwork,
While restraining the position of the parent pile in the vertical direction, which is the direction perpendicular to the width direction in plan view, and the position of the parent pile in the width direction,
The construction method of the retaining wall according to claim 10, wherein the retaining wall is constructed by installing the concrete sheet pile member while restraining the position of the concrete sheet pile member in the vertical direction. The web of the parent pile is provided with a guide member that contacts the surface on the back side of the first protrusion,
Installing the parent pile provided with the guide member;
The earth retaining wall is constructed by installing the concrete sheet pile member so as to insert the first protrusion between the flange on the front side of the parent pile and the guide member. Or the construction method of the earth retaining wall of 11.   The construction method of the earth retaining wall as described in any one of Claims 10-12 which connects the said adjacent concrete sheet pile members with a fastener.   A earth retaining wall is provided by attaching a pressure receiving member for receiving a passive earth pressure to the root of the parent pile, embedding the parent pile in the ground, and installing the concrete sheet pile member in contact with the upper end of the pressure receiving member. The construction method of the earth retaining wall as described in any one of Claims 10-13 which constructs | assembles.   The construction method of the earth retaining wall as described in any one of Claims 10-14 which provides a water expansible sealing material between the said main pile and the said concrete sheet pile member.   The construction method of the retaining wall as described in any one of Claims 10-14 which provides a bag body between the said main pile and the said concrete sheet pile member, and injects grout material inside this bag body.

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