JP2012007465A - Retaining wall device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To penetrate pile bodies, constituting a retaining wall device together with retaining wall panels, in soil not only by pressing, and avoiding exposure of the pile bodies to the surface side of the retaining wall to keep continuity of the retaining wall panels.SOLUTION: A retaining wall device 1 comprises: pile bodies 2, respectively provided with a projecting excavation blade 3 helically exposed on a portion from an open lower end to a lower end surface, a receiving part 5 in a portion near an upper end to resist earth pressure from soil on the back face side, a pile body 2 which penetrates in soil with an axial rotation force; and retaining wall panels 6 to constitute a retaining wall 1A altogether, the respective retaining wall panels 6 being held engaged with the receiving part 5 of the pile body 2 in an outward facing direction while receiving soil pressure from soil in the back. Each retaining wall panel 6 has a groove part 7 in a middle portion in a thickness direction on each of both lateral sides for inserting the receiving part 5 so that each retaining wall panel 6 is lowered to contact the pile body 2 which has penetrated in soil by inserting the receiving part 5 to the groove part 7, thus each retaining wall panel 6 is held by the receiving parts 5 and 5 of the neighboring pile bodies 2 and 2.

Description

  The present invention relates to a retaining wall device composed of a retaining wall panel that forms a retaining wall by collecting a plurality of sheets, and a pile body that holds the retaining wall panel in a state of penetrating into the ground.

  The retaining wall, which is completed by holding the panel on the pile using the pile that penetrates the ground adjacent to the ground, is dropped between the parent pile using H-shaped steel and the adjacent parent pile. There are many types that are composed of transverse sheet piles that are inserted and held by the opposing flanges of the parent pile (see Patent Documents 1 and 2). This horizontal sheet pile format includes a mode in which a main pile is inserted into a steel pipe pile and embedded in concrete (see Patent Literature 3), and a mode in which a steel pipe pile is used as a parent pile (see Patent Literature 4).

  These retaining piles in the form of horizontal piles (earth retaining walls) allow the piles to penetrate into the ground in advance so that the workability when dropping the horizontal piles is good. Although it has an advantage that the stability of the horizontal sheet pile is easily ensured by being held between the opposing flanges, as long as H-shaped steel is used as the main pile, penetration into the ground is fundamental except for Patent Document 4. Therefore, it must be relied on by hitting, press-fitting, or insertion after digging.

  In the method by hitting, the generation of noise becomes a problem, so the place of use is restricted. In the case of press-fitting, since it is necessary to apply a static pressure to the H-section steel vertically downward, it is necessary to install a hydraulic device (hydraulic cylinder) having a large output in the leader. In addition, since construction machines such as pile driving machines are responsible for the reaction force of press-fitting, it is necessary for the construction machine to have a mass that does not cause lift due to the reaction force, which inevitably results in a large displacement (carbon dioxide emissions). (Many) become.

  On the other hand, for the purpose of avoiding exposure of the H-shaped steel to be the main pile to the retaining wall surface, the panel located on the front side of the retaining wall and the cover located on the back side, or H-shaped steel There is also a type in which the H-shaped steel is surrounded by two panels arranged symmetrically with respect to each other, and the area surrounded by both is filled with concrete or the like (see Patent Documents 5 and 6).

Japanese Patent Laying-Open No. 2006-104782 (FIGS. 1 to 3) JP 2008-54413 A (FIGS. 1 to 3 and FIG. 5) Japanese Patent Laid-Open No. 09-100535 (FIGS. 2 and 3) Registered Utility Model No. 3139588 (FIGS. 3 to 5) Japanese Patent No. 2918420 (FIGS. 1, 6, 25, 26, and 28) Japanese Patent No. 2918421 (FIGS. 1, 4, 13, 14, and 16)

  In the method using a parent pile, the flange of the parent pile is always exposed on the ground surface side. For example, even if a design that enhances the appearance of the retaining wall is applied to the surface of the lateral sheet pile (panel), the continuity of the lateral sheet pile is impaired, so that the design effect is not sufficiently exhibited. As long as the parent pile is exposed on the surface side of the retaining wall, the continuity of the side sheet piles (panels) is impaired. Therefore, Patent Document 3 in which the parent pile is inserted into the steel pipe pile, and Patent Document 4 in which the parent pile is a steel pipe pile. Deterioration of the appearance of the retaining wall is not avoided.

  In patent documents 5 and 6 which avoid exposure of a main pile (H section steel), since it is a form which covers the whole H section steel with a pair panel and a cover, or two panels, in the insertion position of H section steel The thickness of the retaining wall (plate thickness) becomes extremely larger than the thickness of the other parts, the surface of the retaining wall must be corrugated, and the surface of the retaining wall cannot be finished flat (smooth). For this reason, when the retaining wall is built facing the road, the width of the road must be reduced due to the presence of the panel on the retaining wall surface side. This results in sacrificing effective use.

  From the above background, the present invention proposes a retaining wall device of a type in which the pile main body can be penetrated into the ground without depending only on press-fitting, and exposure to the retaining wall surface side of the pile main body does not occur. .

In the retaining wall device according to the first aspect of the present invention, the tip is opened, and a drilling blade that is exposed spirally from the tip to the surface of the tip is protruded, and is present on the back side in a section near the upper end. A pile main body having a receiving portion that resists earth pressure from the back soil, and held in an out-of-plane engagement state with the receiving portion of the pile main body, receiving the earth pressure from the back soil, and a plurality of sets And a retaining wall panel constituting the retaining wall,
The pile body is given a rotational force around the axis on the upper end side, penetrates into the ground while rotating,
The retaining wall panel has a groove part in which the receiving part is inserted in the middle part in the thickness direction on both sides in the lateral direction, and is dropped from above with respect to the pile main body penetrating into the ground, and into the groove part It is assumed that the receiving part is inserted into the receiving parts of the two pile main bodies that are adjacent in the horizontal direction on both sides in the horizontal direction.

  The “tip of the pile main body” refers to the lower end of the pile main body, and the pile main body has a tubular shape with a circular cross section or a cross section close thereto, such as a steel pipe pile, a concrete pile, a composite pile, or the like with the open end (lower end). The lower end of the excavating blade protrudes downward from the tip of the pile body and contacts the ground in advance of the tip of the pile body, thereby protecting the tip of the pile body from damage due to direct contact with the ground. The part above the lower end of the excavating blade protrudes (exposes) from the tip of the pile body to the outer peripheral side of the pile body, and continues spirally to the surface of a partial section on the tip side of the pile body.

  “Out-of-plane direction” refers to the out-of-plane direction of the retaining wall panel from the description of “the retaining wall panel held in a state of being engaged with the receiving portion in the out-of-plane direction”. As shown in FIG. 1, the “lateral direction” of the retaining wall panel basically indicates the horizontal direction in the in-plane direction of the retaining wall panel. For example, the retaining wall panel is not horizontal when the center line in the in-plane lateral direction is not horizontal. Since it may be installed, the “lateral direction” includes a direction inclined with respect to the horizontal direction.

  Similarly, the “height direction” of the retaining wall panel basically indicates the vertical direction in the in-plane direction. For example, the supporting member 4 having a receiving portion and directly holding the retaining wall panel has a lower end. When using H-section steel with a gradually reduced profile from the top to the top, the retaining wall panel may be installed with the in-plane direction not forming a vertical plane. "Includes a vertical direction and a direction inclined with respect to the vertical direction. Although FIG. 1 shows a case where the distance in the height direction (width direction) of the retaining wall panel is smaller than the distance in the horizontal direction (length direction), the distance in the height direction (width direction) is the horizontal direction (length). (Direction) may be larger.

  Because the pile body has a spiral excavating blade at the tip, the pile body can only penetrate the shaft from the upper end and has the ability to penetrate into the ground itself, so it does not depend on the striking force. It is possible to penetrate into the ground without relying only on press-fitting. While the pile body is given a rotational force around its axis, it may be given pressure downward in the vertical direction, that is, it may penetrate into the ground by a combination of rotation and press fit.

  Since the pile main body can penetrate into the ground itself, there is no need to use a hydraulic device such as a hydraulic cylinder with a large output as in the case of depending on only press fitting. Even if press-fitting may be used in combination with the penetration of the pile body, it is sufficient that the pressure is applied in an auxiliary manner, and the construction machine itself does not need to bear the reaction force of the press-fitting. Therefore, the construction machine does not have to have the mass as in the case of only press fitting, and is light and small, and the amount of carbon dioxide discharged from the construction machine is reduced.

  If the H-shaped steel of the main pile used in the conventional main pile horizontal sheet pile cannot be penetrated into the ground by striking or press-fitting, a hole is formed in the ground beforehand by excavation (pre-drilling) Although the pile body of the present invention corresponding to the conventional parent pile can be penetrated into the ground by rotation around the axis, it is not necessary to form a drilling hole in advance. Construction is greatly simplified in comparison with the horizontal sheet pile format.

  Since no drilling holes for pile penetration are required, concrete, mortar, soil cement, etc. filled in the drilling holes are not used to stabilize the pile when forming drilling holes. In addition to saving costs, there is no need to operate a construction machine for drilling, so the carbon dioxide emissions from the exhaust of the construction machine are reduced accordingly. Since no drilling is required, there is no use of cement or chemicals for stabilizing the hole wall, so there is no contamination of the soil.

  Penetration of the pile body into the ground is shown in FIGS. 6 and 7 with the upper end (head) of the pile body held by a cap (chuck) connected to the leader of the construction machine as shown in FIG. As shown, a rotational force around the axis is applied together with the cap. The pile body penetrates into the ground by forcibly rotating the pile body around its axis, and the excavating blade at the tip of the pile body cuts the ground and removes it to the outer peripheral side of the pile main body or to the outer peripheral side and inner peripheral side. To do. Since the earth and sand cut by the excavating blade is removed to the outer peripheral side and the inner peripheral side of the pile body, soil discharge to the ground does not occur or the amount of soil discharge is reduced. Reduced.

  The support part 4 is joined (integrated) to the inside of the pile main body 2 as shown in FIGS. 1 and 2, for example, or joined to the outside as shown in FIGS. 3 and 4 (integrated). When formed on the support member 4 (Claim 2), if the cap (chuck) cannot be attached to the upper end (head) of the pile body 2, the pile body 2 excluding the support member 4 The support member 4 is joined after only penetrating only the ground into the ground. FIGS. 9A and 9B show a procedure when only the pile main body 2 is penetrated into the ground in advance and the support member 4 is joined (attached) later.

  As described above, since the tip of the excavating blade protrudes downward from the tip of the pile main body, the tip of the pile main body comes into contact with the ground before cutting and starts cutting. The excavating blade also spirals continuously from the tip of the pile body to the surface of the pile body, so that the earth and sand cut by the tip of the excavating blade is cut along the upper surface of the excavating blade as the pile body rotates. Since it is carried upward relative to the pile main body from the position, the resistance that the excavating blade receives from the earth and sand in the ground is small, and the penetration workability (workability) is improved. In particular, since the tip of the excavating blade protrudes from the tip of the pile body, the possibility that the pile body is damaged even in hard ground is low. The high penetration workability (construction performance) at the time of construction can also be said when the penetration target ground of the pile body is soft ground.

  The earth and sand carried along the upper surface of the excavating blade tries to fall from the upper end of the excavating blade to the outer periphery of the pile body, but is pressed against the hole wall during the fall by the side surface on the hole wall side of the rotating excavating blade This contributes to stabilization of the hole wall because it is consolidated by the hole wall. By ensuring the stability of the hole wall by the excavating blade, the pile body exerts a high supporting force in the ground even when the ground targeted for penetration of the pile body is soft ground, ensuring the stability in the penetration state.

  The earth and sand cut by the excavating blade is used to stabilize the hole wall, so that the range of loosening the ground around the pile body does not increase when the pile body penetrates into the ground, and the pile body after penetration Since the distance between the outer peripheral surface and the hole wall can be suppressed, it is easy to obtain the peripheral frictional force from the ground. In addition, it is easy to transmit the horizontal force due to earth pressure, water pressure, earthquake, etc. that the pile body receives from the retaining wall panel, and it is also easy to receive reaction force from the ground, so it has resistance to horizontal force, Ensure high stability against earth pressure from wall panels or seismic force.

  Moreover, the tip of the excavating blade straddles the outer peripheral surface and inner peripheral surface of the pile body, so that the earth and sand existing on the outer peripheral side and inner peripheral side of the pile main body can be cut, and the outer peripheral surface and inner peripheral surface of the pile main body In order to reduce the resistance received by the pierce, the penetration of the pile body into the ground is helped. This resistance reduction effect by cutting the excavation blade tip functions effectively when the pile is penetrated into hard ground that is difficult to penetrate. When there is a gravel layer or a boulder in the process of penetrating the pile body, a super steel tip for protecting this may be attached to the tip of the excavating blade.

  The receiving part 5 holding the retaining wall panel 6 is formed on the surface of the support member 4 that is inserted into the pile body 2 and joined, separately from the pile body 2 (Claim 2). And it may be formed on the surface (external) of the pile body 2 or may be joined (Claim 3). In the former case (Claim 2), is the receiving portion 5 formed indirectly on the pile body 2 by being formed on the support member 4 as shown in FIGS. 1 to 4, 19, and 20? , Joined. In the latter case (Claim 3), the receiving part 5 is formed or joined directly to the pile body 2 by being formed or joined to the section above the tip of the pile body 2 as shown in FIG. The The “section above the tip of the pile body 2” may be a section above the section where the excavating blade 3 is projected, and the receiving section 5 is a section up to the upper end above the projecting section of the excavating blade 3. Continuously or intermittently.

  Since the pile body 2 penetrates into the ground at least in the section near the tip, the retaining wall panel 6 is exposed to the ground surface as shown in FIGS. 8, 9, 14 to 16, and above the pile body 2. (Claim 2) or in a section (Claim 3) above the tip of the pile body 2. Therefore, when the receiving portion 5 is formed or joined to the surface of the support member 4 inserted into the pile body 2 (Claim 2), the support member 4 holding the retaining wall panel 6 is supported. According to the arrangement level (depth) of the wall panel 6, it is joined to the pile main body 2 in a state of protruding upward from the upper end portion of the pile main body 2 as shown in FIGS.

  The support member 4 according to claim 2 is inserted into the inside of the pile main body 2 as shown in FIG. It is joined (fixed) to the pile body 2 by being fixed in the filler 10 such as concrete or mortar to be filled, or by welding or bolting inside the pile body 2 as shown in FIG. The

  In the case of FIG. 1, the filler 10 may be filled over the entire length of the pile body 2, but since the material is wasted and the mass of the pile body 2 is increased, the filler 10 is at the upper end. It only needs to be filled. In that case, the slat 11 which restrict | limits the filling area of the filler 10 is fixed to the upper end part inside the pile main body 2. FIG.

  In the example shown in FIG. 2, when the support member 4 and the pile main body 2 are welded, joining is performed by performing fillet welding or the like on a portion inscribed in the pile main body 2 of the support member 4, for example, a flange edge portion. When the support member 4 and the pile main body 2 are to be bolted together, a metal fitting in close contact with the surface (outer peripheral surface) or the inner peripheral surface of the pile main body 2 is interposed, and a bolt penetrating the hardware and the support member 4 is used. Joining is performed by inserting. In FIG. 2, T-shaped steel is used for the support member 4, but the type of the shape steel (steel material) used for the support member 4 is not limited, and welding and bolt joining are made of shape steel (including lightweight shape steel). Performed regardless of type.

  When the receiving part 5 is formed or joined to the surface of the pile body 2 (Claim 3), when the receiving part 5 is directly formed (joined) to the pile body 2 as shown in FIG. The support member 4 is formed (joined) in a section extending downward from the upper end of the main body 2, but the receiving portion 5 is additionally joined (integrated) to the pile main body 2 similarly to the case of claim 2. When formed, as shown in FIGS. 3 and 4, a support member 4 such as a steel material (section steel) constituting the receiving portion 5 is joined to at least a section of the upper end portion of the pile body 2.

  “The receiving part is formed directly on the surface of the pile body” means, for example, a steel pipe having a notch that can become the receiving part 5 or a notch is formed and a lip like a hat-shaped steel is added. The pile main body 2 is formed by, for example, forming a notch (cutting) and bending the section in which at least the receiving portion 5 of the pile main body 2 itself is formed as in the case of a steel pipe having a round shape. It means that at least a part of itself has a shape having the receiving portion 5. “The receiving part is directly joined to the surface of the pile main body” means that, for example, a steel material (including the support member 4) such as a steel plate is welded to the surface of the steel pipe 2 constituting the pile main body 2 as shown in FIG. Is added (joined).

  Since the receiving part 5 is stored in the groove part 7 of the retaining wall panel 6 and only needs to be engaged with the inner peripheral surface of the groove part 7 in the out-of-plane direction of the retaining wall panel 6 (Claim 1), the receiving part 5 and the groove part in which the receiving part 5 is accommodated. The horizontal cross-sectional shape of 7 is not ask | required, The steel material etc. of arbitrary cross-sectional shapes can be used for the receiving part 5. FIG. The “steel material etc.” is intended to include materials such as plastic and hard rubber other than steel materials. As shown in FIGS. 18 to 21, the simplest shape of the receiving portion 5 is a flat plate using a plate or a flat bar alone as a steel material such as a shape steel.

  18 shows a case in which the receiving portion 5 using a plate or the like is directly projected (welded) to the side surface of the pile body 2 itself on the retaining wall panel 6 side, and FIG. 19 shows the receiving portion 5 having the same shape as FIG. This is a case where the support member 4 joined to 2 is protruded (welded). In addition to this, the plate or the flat bar is combined to form a receiving portion 5 having a cross shape other than the flat plate shape as shown in FIG.

  20, as in FIGS. 2 and 19, the support member 4 joined in a state inscribed in the upper end portion side of the pile body 2 is formed by a combination of plates or the like, and a part thereof is used as the receiving portion 5. An example is shown. Here, in order to give out-of-plane bending rigidity to the plate that becomes the receiving portion 5, ribs 4 b using a flat bar or the like for stiffening are joined to the plate of the receiving portion 5 in combination in a cross shape. However, the shape of the combination is arbitrary.

  As shown in FIGS. 1, 2, 19, and 20, when the support member 4 is joined to the pile body 2 while being inscribed in the pile body 2, the upper end of the pile body 2 from the outer peripheral portion of the support member 4. The part can be used to support the retaining wall panel 6 (because the retaining wall panel 6 is placed) by projecting to the outer peripheral side with respect to the center of the pile body 2 while maintaining the shape (circular shape). It is. In FIG. 1, in order to stably support the retaining wall panel 6, a dedicated stopper 4 a is projected at the lower end position of the support member 4 protruding from the upper end of the pile body 2. If the retaining wall panel 6 is stable, the stopper 4a is not always necessary.

  On the other hand, as shown in FIG. 18, when the pile body 2 continues to the level of the upper end of the retaining wall panel 6 and the receiving portion 5 protrudes (joins) to the outer peripheral surface (surface) of the pile body 2. Since any part of the pile body 2 including the receiving part 5 can support the lower end of the retaining wall panel 6 and does not protrude to the retaining wall panel 6 side, the retaining wall panel is below the receiving part 5. A mounting portion 2a for supporting 6 is formed (projected). The mounting part 2a is projected by butt welding a plate or the like processed into a shape on which the retaining wall panel 6 can be mounted to the outer peripheral surface of the steel pipe which is the pile body 2. In the case of FIG. 1, FIG. 19, etc., the end surface of the upper end of the pile main body 2 corresponds to the mounting portion 2a in FIG.

  When the top (upper end) of the pile main body 2 or the support member 4 (hereinafter referred to as the pile main body 2 or the like) is positioned (aligned) at the level of the upper end of the retaining wall panel 6 as shown in FIG. For example, an end surface of the retaining wall panels 6 and 6 adjacent to each other with the pile main body 2 etc. on the side of the pile main body 2 etc. transmits, for example, earth pressure received by the earth pressure transmission unit 8 described later to the whole pile main body 2 etc. In doing so, the both end surfaces of the retaining wall panels 6, 6 are paired to form a shape that covers the entire pile body 2 and the like together with the receiving portion 5. However, for example, as shown in FIG. 21- (b), when the support member 4 is substantially composed only of the receiving portion 5, or only the receiving portion 5 protrudes upward from the head of the pile body 2, and the supporting member 4 Is substantially absent, the retaining wall panels 6 and 6 may be formed in a shape that covers only the receiving portion 5.

  In the case of the example shown in FIG. 21- (b), since the flat plate-like receiving portion 5 has poor bending rigidity in the out-of-plane direction, when only the receiving portion 5 protrudes alone from the upper end portion of the pile body 2, As shown in FIGS. 20A and 20B, it is appropriate that some protrusions are formed in the out-of-plane direction so as to have a shape close to a T shape or a cross-shaped cross section. FIGS. 20A and 20B show an example in which ribs 4b are projected (formed) at the center in the width direction of the plate or the like constituting the receiving portion 5 to ensure the bending rigidity in the out-of-plane direction. 20- (a) and (b) is a plate having a plate thickness smaller than the diameter of the reinforcing bar on the same line on the surface of the reinforcing bar (round steel, deformed reinforcing bar) as shown in FIG. 20- (c), for example. It can also be obtained by welding or the like.

  As shown in FIGS. 18 to 21, when the flat receiving portion 5 is provided on the pile body 2 or the support member 4, the pile body 2 of the retaining wall panels 6 and 6 disposed on both sides of the pile body 2 and the like. The end face on the same side basically covers the entire pile body 2 and the like together with the receiving portion 5 as described above, or at least covers the pile body 2 and the like from the opposite side of the natural ground (the surface side of the retaining wall 1A). A groove portion 7 is formed which is formed in a concave shape and in which the receiving portion 5 is accommodated in a part of the concave portion.

  Each retaining wall panel 6 is dropped between the pile main bodies 2, 2 or between the support members 4, 4 arranged on both sides in the lateral direction, so that the receiving part 5 enters the groove part 7, in the out-of-plane direction. In the engaged state, it is held by the pile main bodies 2, 2 etc. on both sides. In this state, the retaining wall panels 6, 6 arranged on both sides of the pile main body 2 etc. avoid the exposure of the receiving part 5 from the surface side (opposite the natural ground) (conceal the pile main body 2 etc.) Then, as shown to Fig.5- (a), the concealment part 9 is formed in the other side of a natural ground regarding the center on the cross section of the retaining wall panels 6 and 6 which conceal the pile main body 2 grade | etc.,.

  The receiving part 5 is concealed from the surface side by the retaining wall panels 6 and 6 when the end surfaces of the concealing parts 9 and 9 of the adjacent retaining wall panels 6 and 6 approach each other. Since it is not necessary to conceal the retaining wall panel 6 on a certain natural mountain side, the end surfaces of the retaining wall panels 6 and 6 do not necessarily have to approach each other. However, on the back side of the retaining wall panel 6, it is necessary to transmit the earth pressure and water pressure received from the natural ground received by the back surface of the retaining wall panel 6 to the part 5 (pile body 2 etc.), so the earth pressure that fulfills that role A transmission portion 8 is formed.

  Since the earth pressure transmission part 8 of the retaining wall panel 6 bears the earth pressure and water pressure from the natural ground, it is reasonable that a thickness larger than the thickness of the concealing part 9 is given as described later ( 5), in order to give the earth pressure transmission part 8 a thickness larger than the concealing part 9, the projecting position of the receiving part 5 on the pile body 2 or the support member 4 as shown in FIG. The thickness direction surface side of the retaining wall panel 6 (the surface side of the retaining wall 1A) may be approached with respect to the center of the main body 2 or the like.

  As shown in FIG. 18, when the receiving portion 5 is directly protruded from the pile body 2, the retaining wall panel 6 can be obtained by arranging the center line in the thickness direction of the receiving portion 5 on a line passing through the center of the pile body 2. Although the thickness of the earth pressure transmission part 8 and the concealing part 9 can be made equal, the earth pressure is shifted by shifting the projecting position of the receiving part 5 in the thickness direction of the retaining wall panel 6 as shown in FIG. A difference can be given to the thickness of the transmission part 8 and the concealing part 9.

  Similarly, as shown in FIG. 19, when projecting the receiving portion 5 on the support member 4 joined to the pile body 2, the center line in the thickness direction of the receiving portion 5 is arranged on a line passing through the center of the support member 4. If this is done, the thickness of the earth pressure transmitting portion 8 and the concealing portion 9 of the retaining wall panel 6 can be made equal. However, as shown in FIG. It is possible to give the earth pressure transmission part 8 a thickness larger than the concealing part 9 by arranging it on the surface side in the thickness direction.

  FIG. 3 shows that the support member 4 is joined downward from the upper end (head) of the pile body 2, that is, the upper end (head) of the support member 4 is aligned with the upper end (head) of the pile body 2. FIG. 4 shows a case where the support member 4 has an overlap margin in the section on the upper end (head) side of the pile body 2 and is joined in the overlap section in a state of protruding upward from the upper end of the pile body 2. is there. A retaining wall panel 6 is disposed in the entire length of the support member 4 when the support member 4 is continuously added to the pile body 2 or when the support member 4 is intermittently added (exposed to the ground surface). Yes) depending on the section (height). “The support member 4 is intermittently added” means that the support member 4 including the receiving portion 5 is divided (divided) in the axial direction and joined to the pile body 2, and is divided. The sum of the total lengths of the individual parts is “the entire section of the support member 4”.

  The receiving part 5 in claim 3 or the support member 4 having the receiving part 5 is joined to the pile main body 2 by welding or fixing to concrete or the like, similar to the support member 4 in claim 2. When arranged outside, it is joined mainly by welding or bolts.

  FIGS. 3A and 3B are views of the same pile main body 2, wherein FIG. 3A shows a state of looking down, and FIG. 3B shows a state of looking up. FIG. 4 shows a case where the T-shaped steel support member 4 shown in FIG. 2 is arranged on the surface (outer peripheral surface) side of the pile body 2, and in this case, the T-shaped steel web hits the surface of the pile body 2. The support member 4 is welded or bolted to the pile body 2 in the web.

  As described above, in both cases of claim 2 and claim 3, “the receiving portion 5 is formed” means that the support member 4 itself or the pile body 2 itself is received on the surface side (outer peripheral surface side). It has having the cross-sectional shape in which the part 5 is formed, and joining the support members 4, such as steel materials which comprise the receiving part 5, to the pile main body 2.

  In either case of claim 2 or claim 3, the receiving part 5 may be formed (joined) at least in an upper section of the entire length of the pile body 2 where the retaining wall panel 6 is disposed. In the case of claim 3 in which the part 5 is formed (joined) on the surface of the pile body 2, as shown in FIG. 4, the support part 4 or the support having the receiving part 5 as in the support member 4 of claim 2. The member 4 is formed (joined) so as to protrude upward from the upper end portion of the pile main body 2, and only the pile main body 2 may be buried in the ground as shown in FIG.

  When the receiving part 5 is joined in a state of protruding upward from the upper end part of the pile body 2, the receiving part 5 is disposed inside the pile body 2 as shown in FIG. 2 (Claim 2). As shown in FIG. 4, there is a case where it is arranged outside (Claim 3).

  As shown in FIGS. 1 and 2, when the receiving part 5 is arranged inside the pile main body 2, the resistance received by the receiving part from the ground at the time of penetration with the rotation of the pile main body 2 may be small. The joining of 5 does not hinder the penetration work of the pile body 2. 3 and 4 in which the receiving part 5 is arranged outside the pile body 2, the joining section of the receiving part 5 is located above the penetration part of the pile body 2 into the ground. As shown, if the penetration of the pile main body 2 into the ground is completed at the level of the lower end of the receiving portion 5, the receiving portion 5 does not become a resistance when penetrating the pile main body 2, so the penetration work of the pile main body 2 Is unlikely to inhibit.

  The receiving part serves as a guide when the retaining wall panel is dropped after the pile body has penetrated into the ground, and when the retaining wall panel is received as described above, the retaining wall panel engages the receiving part in the out-of-plane direction. By doing so, the retaining wall panel has a role of resisting the earth pressure received in the out-of-plane direction from the back soil existing on the back side. Since the receiving portion only has to play a role as a guide and a role to resist earth pressure, the receiving portion may be formed continuously or intermittently in the axial direction of the pile body.

  Whether formed continuously or intermittently, the receiving part is inserted into the groove formed in the thickness direction of the retaining wall panel by dropping the retaining wall panel, and on both sides sandwiching the groove part By being sandwiched between the portions, it is concealed by the retaining wall panel on the surface side, so that exposure to the retaining wall surface is avoided.

  By avoiding exposure of the receiving part to the surface of the retaining wall, the surface of the retaining wall has an appearance that allows only the joints of the retaining wall panels adjacent in the lateral direction to be seen, ensuring the continuity of the retaining wall panel. Therefore, the appearance design of the entire retaining wall composed of a plurality of retaining wall panels is improved. The retaining wall panel is made of precast concrete or steel (metal), or is made of stone, synthetic resin (plastic), hard rubber, ceramics (pottery), etc., in addition to a composite structure of both.

  The receiving part of the pile body and the groove part of the retaining wall panel need only have a shape that fits in the height direction of the retaining wall panel by dropping the retaining wall panel and engages with each other in the thickness direction of the retaining wall panel. The specific shape of each is not questioned.

  However, the groove portion 7 formed in the retaining wall panel 6 is configured, and the portion located on the both sides in the thickness direction across the groove portion (recessed portion) 7 is the portion located on the back side as shown in FIG. As shown, the retaining wall panel 6 is subjected to earth pressure received on the back surface, or earth pressure and water pressure to the receiving portion 5 of the pile body 2 (supporting member 4) (earth pressure transmitting portion 8). On the other hand, it becomes a convex part (convex shape).

  On the other hand, the receiving part 5 of the pile main body 2 (supporting member 4) is accommodated (inserted) in the groove part 7, and the earth pressure from the part (earth pressure transmission part 8) in which this receiving part 5 is located on the back side of the groove part 7, Or since it receives earth pressure and water pressure, the groove part 7 becomes a recessed part (concave shape) with respect to the earth pressure transmission part 8. When the retaining wall panel 6 is dropped from above, the receiving part 5 is inserted into the groove part 7 of the retaining wall panel 6, and in this state, is engaged with the inner peripheral surface of the groove part 7 in the out-of-plane direction of the retaining wall panel 6. Therefore, the retaining wall panel 6 may be movable relative to the retaining wall panel 6 in the in-plane horizontal direction (lateral direction) or may be engageable. Therefore, the flange side of the groove portion 7 that is the tip side of the receiving portion 5 may be formed in a convex shape such as a rod shape that can engage with the groove portion 7 in the in-plane direction.

  The groove portion 7 of the retaining wall panel 6 is configured, and the portion located on the surface side in the thickness direction across the groove portion (concave portion) 7 is concealed from the surface side of the retaining wall panel 6 in the groove portion 7. Therefore, the groove portion 7 is a convex portion (convex shape). Since the concealing portion 9 on the surface side of the retaining wall panel 6 is a convex portion with respect to the groove portion 7, pressure is applied from the receiving portion 5 when the receiving portion 5 of the pile body 2 (supporting member 4) comes into contact. Although it can be received, in principle, the concealing portion 9 only needs to have a role of covering the receiving portion 5, and therefore it is not necessary to receive a load from the receiving portion 5.

  In this manner, the portion located on the back side across the groove portion 7 (earth pressure transmission portion 8) bears earth pressure (load), whereas the portion located on the surface side (hiding portion 9) is in principle soil. Since it is not necessary to bear the pressure (load), the thickness D1 of the portion (earth pressure transmission portion 8) relatively located on the back side as shown in FIG. It is reasonable that the concealing part 9) is formed to be larger than the thickness D2 (D1> D2).

  In the region where the retaining wall panel 6 is disposed at a depth at which the earth pressure received by the rear surface of the retaining wall panel 6 or the earth pressure and water pressure increase, or the earth pressure or the like increases due to the soil quality of the natural ground. As shown in FIG. 13, two or more earth pressure transmission portions 8 and 8 are formed in the thickness direction of the retaining wall panel 6, and two or more receiving portions 5 and 5 are formed on the support member 4 accordingly. . The two receiving portions 5 and 5 arranged in parallel in the thickness direction of the retaining wall panel 6 are automatically formed by using H-shaped steel for the support member 4.

  If the portion (the concealing portion 9) located on the surface side across the groove portion 7 may receive pressure (load) from the receiving portion 5 in “a part in the height direction”, for example, the pressure is the pile body 2 However, the pressure is transmitted from the earth pressure transmitting portion 8 of the retaining wall panel 6 to the receiving portion 5 in a section other than the “part in the height direction”. It is considered that the pressure borne by the concealing unit 9 is not as large as the pressure borne by the earth pressure transmitting unit 8.

  The earth pressure transmitting portion 8 and the concealing portion 9 facing each other in the thickness direction of the retaining wall panel 6 across the groove portion 7 are paired to sandwich the receiving portion 5 of the pile main body 2 (supporting member 4). Here, for example, as shown in FIGS. 1 to 4, H-shaped steel or T-shaped steel is used for the support member 4 on which the receiving portion 5 is formed, and the retaining wall panel 6 is set in the strong axis direction (direction parallel to the web). Between the opposing end surfaces of the earth pressure transmitting portions 8 and 8 of the retaining wall panels 6 and 6 adjacent to each other in the in-plane direction (lateral direction) on the back side of the retaining wall panel 6. Since the web of the support member 4 exists, it is necessary to secure at least a gap corresponding to the thickness of the web between the end faces of the earth pressure transmitting portions 8 and 8 facing each other of the adjacent retaining wall panels 6 and 6. . When the support member 4 is H-shaped steel, the flange located on the surface side of the retaining wall panel 6 becomes the receiving portion 5, and when it is T-shaped steel, the flange becomes the receiving portion 5.

  On the other hand, opposing end surfaces of the concealing portions 9 and 9 of the retaining wall panels 6 and 6 adjacent to each other in the in-plane direction (lateral direction) on the surface side of the retaining wall panel 6 with the receiving portion 5 (flange of the support member 4) interposed therebetween. Since it is appropriate that the joints between the retaining wall panels 6 and 6 are close to each other so as to be as small as possible, there is basically no need to secure a gap between the end faces of the concealing portions 9 and 9 facing each other. . If the space is secured, the distance between the end faces of the concealing portions 9 and 9 of the adjacent retaining wall panels 6 and 6 facing each other is such that the retaining wall panels 6 and 6 adjacent in the lateral direction are mutually displaced when they are relatively displaced. It is sufficient if there is a distance that does not cause a collision.

  When H-shaped steel or T-shaped steel is used for the support member 4 in which the receiving portion 5 is formed in this way, the concealing portion located on the surface side of the retaining wall panel 6 as shown in FIG. 9, the distance W2 from the bottom of the groove portion 7 is larger than the distance W1 from the bottom of the groove portion 7 of the earth pressure transmitting portion 8 located on the back side (W1 <W2). The same applies to the case where C-shaped steel or angle steel is used for the support member 4. For example, when a flat steel (flat bar) or plate having no web is used for the support member 4 as shown in FIGS. 20 and 21- (b), the relationship of W1 <W2 is not always satisfied.

  When the receiving part 5 is formed (joined) on the surface of the support member 4 as shown in FIGS. 1 and 19 (Claim 2), the pile body 2 is positioned below the support member 4, Since it will be in the state which does not protrude to the ground surface when it penetrates in the ground, even if the receiving part 5 formed in the support member 4 is located in the cross section of the pile main body 2 on a plane, FIG. As shown to (c), the situation where the pile main body 2 is exposed to the surface side of the retaining wall 1A is avoided.

  When the receiving part 5 is formed (joined) on the surface of the pile body 2 as shown in FIG. 18 (Claim 3), it is formed (joined) below the upper end of the pile body 2 as shown in FIG. When the penetration of the pile main body 2 into the ground is completed, the pile main body 2 can also protrude from the ground in the section where the receiving portion 5 is exposed from the ground as shown in FIG. However, as a result of penetration due to rotation of the pile body 2, if the pile body 2 is in a penetration completed state with the receiving portion 5 wrapping around the surface side of the retaining wall panel 6 as shown in FIG. Thus, since the receiving part 5 is concealed from the surface side of the retaining wall 1A by dropping the retaining wall panel 6, exposure of the pile body 2 is avoided.

  Also in claim 3, when the receiving portion 5 is formed (joined) so as to protrude upward from the upper end portion of the pile body 2 as shown in FIG. 2 so that only the receiving portion 5 protrudes from the ground surface, the pile body 2 is embedded in the ground, and does not protrude from the ground surface, so the pile body 2 is exposed to the surface side of the retaining wall 1A. There is no situation to do.

  Depending on the surface shape of the natural ground, the retaining wall 1A may be formed as a flat surface or a curved surface as a whole, so that the insertion position of the pile main body 2 and the receiving portion 5 The formation position is determined, and the pile bodies 2 are not necessarily arranged in the same straight line on the plane, but may be arranged in a curved line.

  In the case where the retaining wall 1A is arranged in two or more directions on the plane, and the corner portion where the retaining wall 1A arranged in two directions is abutted is formed on the surface of the natural ground, it is shown in FIGS. As described above, the receiving portions 5 and 5 (51) are formed (joined) in at least two places on the pile main body 2 (supporting member 4) disposed in the corner portion. The formation (joining) direction from the center of the pile body 2 of the receiving portions 5 and 5 (51) formed (joined) in two places is not necessarily an orthogonal direction, and is arbitrary according to the planar shape of the natural ground. Formed (joined) in the direction.

  As shown in FIG. 8, the retaining wall panel 6 penetrates into the ground prior to it and falls between the receiving portions 5 and 5 of the pile main bodies 2 and 2 (support members 4 and 4) which are juxtaposed (adjacent). In rare cases, the retaining wall 1A is formed when the receiving portions 5, 5 are inserted into the grooves 7, 7 on both sides in the lateral direction. The retaining wall panel 6 is dropped as shown in FIG. In order to avoid intrusion (entrance) of the earth and sand into the groove portion 7, it is better to carry out in a state where there is no earth and sand on the back surface of the retaining wall panel 6.

  As shown in FIG. 15, when the retaining wall panel 6 is installed on a ground that already exists, the earth and sand are once removed (removed) from the installation location of the retaining wall panel 6. It is desirable that the pile body 2, 2 (support members 4, 4) on both sides in the lateral direction is returned (backfilled) as back soil after being held by the receiving portions 5, 5.

  As shown in FIGS. 9 and 16, when the retaining wall panel 6 is installed at a place where there is no earth and sand in the natural ground, the rear surface of the retaining wall panel 6 is newly filled with earth and sand. In the case shown in FIGS. 9 and 16, the ground site is expanded by installing the retaining wall device 1 including the pile main body 2 and the retaining wall panel 6 and filling the back soil, and measures for preventing landslides are taken. Therefore, the stability and safety of the structure built on the ground are improved.

  The back soil present on the back surface of the retaining wall panel 6 is filled in that position, so that earth pressure acts on the retaining wall panel 6 from the back surface, but by filling the gap on the back surface of the retaining wall panel 6, It works to prevent slipping of earth and sand on the shore side and prevent the entire ground from collapsing.

  Retaining wall comprising the pile body 2 and the retaining wall panel 6 when the pile body 2 penetrates into the ground, the retaining wall panel 6 is held in the pile body 2 and the back soil is filled in the back surface of the retaining wall panel 6 In the use state of the device 1, earth pressure from the back soil received by the back surface of the retaining wall panel 6 is transmitted to the receiving portion 5 of the pile body 2 (supporting member 4) through the earth pressure transmitting portion 8 constituting the groove portion 7. .

  Furthermore, it is transmitted from the receiving part 5 to the section of the pile body 2 penetrating into the ground, and transmitted from the surface of the underground section of the pile body 2 to the ground as shown in FIG. 9- (c). The retaining wall device 1 maintains the state fixed to the natural ground as the retaining wall 1A, and exhibits the function of preventing the entire ground from collapsing.

  The retaining wall device 1 in which the retaining wall device 1 is fixed to the ground is used in a state where the pile body 2 penetrates into the ground and the retaining wall panel 6 is held by the adjacent pile bodies 2 and 2 (support members 4 and 4). It is in a state where stability has been ensured, and the depth of penetration of the pile body 2 required to maintain this state is the geology of the ground such as sandy and viscous, the degree of water absorptivity It is decided according to other conditions. In addition, when the pile main body 2 becomes a use state in the state which the pile main body 2 penetrate | invaded in the ground, when a steel pipe (steel pipe pile) is used for the pile main body 2, a steel pipe continues to the level exposed on the ground. The occurrence of corrosion caused by exposure of the pile body 2 (steel pipe) to the outside air facing the case (Patent Document 4) is suppressed.

  The retaining wall panel 6 of the present invention is supported by the pile main body 2 (support member 4) at both ends in the lateral direction (length direction), and simultaneously conceals the pile main body 2 (support member 4) from the surface side. Since it is not necessary for the wall panel 6 to have a shape surrounding the entire pile body 2 (support member 4), the thickness of the retaining wall panel 6 in the pile body 2 portion as in Patent Documents 5 and 6 is determined. It is not necessary to make it larger than the thickness.

  Accordingly, the retaining wall panel 6 can conceal the pile main body 2 (supporting member 4), but the entire retaining wall 1A can be finished to a flat surface (smooth) including the back surface. In the construction, the road width does not need to be reduced, and the effective use of the land as a road is not sacrificed.

  Since the pile body has a spiral excavating blade at the tip, it has the ability to penetrate into the ground itself only by being given rotational force around the axis from the upper end, so it does not depend on the striking force, only for press-fitting It is possible to penetrate the ground without depending on it. Therefore, there is no need to use a hydraulic device such as a hydraulic cylinder with a large output for penetration of the pile body, as in the case of relying only on press fit, and the construction machine used for penetration of the pile body is only by press fit It is not necessary to have a mass, and it is lightweight and small.

The receiving part formed in the pile body is inserted into the groove part formed in the thickness direction of the retaining wall panel, and is hidden between the retaining wall panel by being sandwiched between both sides sandwiching the groove part. It is not exposed on the surface. Accordingly, the appearance of the retaining wall panel is visible only on the surface side of the retaining wall, and the continuity of the retaining wall panel is ensured, so that the appearance design of the entire retaining wall is improved.

It is the perspective view which showed the structural example and construction point of the retaining wall apparatus using the pile main body which inserted the support member in which a receiving part is formed inside, and was joined (integrated) with concrete etc. It is the perspective view which showed the pile main body which inserted the support member in which a receiving part is formed inside, and was joined (integrated) by welding. It is the perspective view which showed the pile main body which joined the support member in which a receiving part is formed below from the upper end part of the surface (outside), (a) is an overhead view, (b) is a top view. It is the perspective view which showed the pile main body which joined the support member in which a receiving part is formed upward from the upper end part of the surface (external). (A) is the top view which showed the relationship between the receiving part of the pile main body (support member) in FIG. 1, and the groove part of a retaining wall panel, (b) is the earth pressure transmission part which comprises the groove part of the retaining wall panel in (a). It is the top view which showed the relationship between and a concealing part. (A) is an elevation view (longitudinal sectional view) showing a state in which the pile main body shown in FIG. 1 or FIG. 2 is penetrating into the ground, and (b) is a state in which the pile main body has been penetrated shown in (a). It is an elevation (longitudinal sectional view) showing (A) is an elevation view (longitudinal sectional view) showing a state in which the pile main body shown in FIG. 3 or FIG. 4 is penetrating into the ground, and (b) is an incomplete state of penetration of the pile main body shown in (a). It is an elevation (longitudinal sectional view) showing It is the elevation which showed the mode at the time of dropping of the retaining wall panel between adjacent pile main bodies (supporting member). (A)-(c) showed the procedure when joining the support member to the pile body after making only the pile body penetrate first into the ground (integrated), in the direction orthogonal to FIG. It is a longitudinal cross-sectional view. (A) The top view which showed the example of a combination of a supporting member and a retaining wall panel in case the corner | angular part by which the retaining wall arranged in two directions on a plane is formed on a part of ground is formed, (b) FIG. 4 is an enlarged view of a support member portion disposed at a corner portion in (a). It is the top view which showed the other example of a combination of a supporting member and a retaining wall panel in the case where the corner | angular part by which the retaining wall arranged in two directions on a plane is abutted on a part of ground is formed. (A) is the perspective view which showed the external appearance of the retaining wall when a retaining wall panel was hold | maintained at the adjacent support member, (b) is the perspective view which showed the retaining wall panel in (a), (c) is ( It is an xx line arrow directional view of b). (A) is a structural example of a retaining wall in which a retaining member in which two or more earth pressure transmitting portions are formed is held on a support member in which two or more receiving portions are formed in the thickness direction of the retaining wall panel. (B) is the perspective view which showed the retaining wall panel used by (a). It is the perspective view which showed the construction example which installed the retaining wall apparatus of this invention in the heel side of the conventional retaining wall which uses a cobblestone with respect to a natural ground. (A) is a longitudinal sectional view showing a state in which a retaining wall device comprising a pile body and a retaining wall panel is inserted into a natural ground, and (b) is a surface (front surface) side of the retaining wall panel after the retaining wall device is penetrated. It is the longitudinal cross-sectional view which showed a mode that the earth and sand which existed in (2) was excluded and the retaining wall was comprised (by cutting). (A) is a longitudinal sectional view showing a state in which only the main body of the pile is inserted into the ground and the retaining wall panel is exposed to the ground surface, and (b) is filled with earth and sand on the back side of the retaining wall panel (backfilling) It is the longitudinal cross-sectional view which showed a mode that the retaining wall was comprised (by embankment). (A) is an elevation view showing the state when the pile body penetrates by the construction machine when the ground level is located above the construction machine, and (b) is when the ground level is located below the construction machine. It is the elevation view which showed the mode at the time of penetration of the pile main body. (A) is a perspective view showing the relationship between the pile body and the retaining wall panel when a flat plate-shaped receiving portion is projected (joined) to the pile body having a length continuous to the upper end level of the retaining wall panel; (B) is the top view which showed the relationship between both when a retaining wall panel is dropped from on a pile main body. (A) Pile main body, support member, and retaining wall panel when a flat plate-shaped receiving part is projected (joined) to a support member made of a steel pipe joined in a state inscribed in the upper end side of the pile main body The perspective view which showed these relationships, (b) is the top view which showed both relationship when a retaining wall panel is dropped from on a support member. (A) is the perspective view which showed the relationship between the plate-shaped receiving part joined in the state inscribed in the upper end part side of a pile main body, or the support member which consists of a flat plate-shaped receiving part, and a pile main body, (b) The top view which showed the relationship between both when a retaining wall panel is dropped from a receiving part or a support member, (c) is a modification of the receiving part or support member shown to (a), (b) It is the shown top view. (A) shows that when the support member is made of a steel pipe, the receiving portion protrudes from the support body in a state where the center line in the thickness direction of the receiving portion is shifted from the pile body or the center of the supporting member to the surface side of the retaining wall panel. The top view which showed the relationship between the supporting member at the time of installing, and a retaining wall panel, (b) is a pile main body or support the centerline of the thickness direction of a receiving part when a supporting member consists of a flat receiving part. It is the top view which showed the relationship between the supporting member at the time of projecting and shifting from the center of a member to the surface side of a retaining wall panel. (A) uses a square steel pipe for the support member, and restrains the retaining wall panel between the upper surfaces of the retaining wall panels adjacent to each other with the supporting member interposed therebetween or on the upper surface of the retaining wall panel continuously arranged in the lateral direction. The perspective view which showed the mode at the time of joining at the time of arrange | positioning a headboard and joining to a supporting member, (b) is a top view of (a). It is the perspective view which showed the construction example of the retaining wall apparatus at the time of installing the headboard shown in FIG. 22 on a retaining wall panel, and installing the falling rock protection fence on it. It is a longitudinal cross-sectional view of FIG.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  In FIG. 1, a drilling blade 3 that is open at the tip and is exposed spirally from the tip to the surface of the tip is protruded, and resists earth pressure from the back soil existing on the back side in a section near the upper end. The pile main body 2 having the receiving portion 5 and the holding portion 5 of the pile main body 2 that are held in an out-of-plane engagement state, are subjected to earth pressure from the back soil, and a plurality of sheets are assembled to form a retaining wall 1A The structural example of the retaining wall apparatus 1 provided with the retaining wall panel 6 to be shown is shown. In the drawing, the three excavating blades 3 are evenly arranged in the circumferential direction at the tip of the pile main body 2, but it is sufficient that two or more excavating blades 3 protrude in the circumferential direction of the pile main body 2.

  Since the pile main body 2 penetrates into the ground by excavating the excavating blade 3 by rotating around its own axis, a pile having a circular cross section such as a steel pipe pile, a concrete pile, a synthetic pile, or the like is used for the pile main body 2. When the pile main body 2 penetrates into the ground due to the rotation of the pile main body 2, a downward pressure may be accompanied.

  The pile body 2 is suspended from the tip of the arm 13 of the construction machine 12 such as a pile driving machine shown in FIG. 17 at the upper end (head), and is held (gripped) by a cap (chuck) suspended from the arm 13. In this state, by being rotated together with the cap by the motor 14 or by applying pressure downward in the vertical direction while being rotated, the motor 14 is penetrated into the ground as shown in FIGS.

  As shown in FIGS. 6 and 7, when the support member 4 is integrated (joined) with the pile body 2 in advance, the receiving portion 5 of the support member 4 is the retaining wall panel when the pile body 2 is penetrated. The rotation of the pile body 2 around the axis and the stop position are controlled so that it stops in the in-plane direction (lateral direction) of 6, that is, in the state where the receiving part 5 faces the retaining wall panels 6, 6. The When the support member 4 is not integrated (joined) with the pile main body 2 in advance, the support member 4 having the receiving portion 5 is inserted after the pile main body 2 has penetrated. There is no position restriction.

  6 (a) and 6 (b) are joined (fixed) to the pile body 2 with the support member 4 having the receiving part 5 protruding upward from the upper end of the pile body 2 as shown in FIGS. 7- (a) and 7 (b) show the state of penetration of the pile body 2 in the case where the upper end of the support member 4 having the receiving portion 5 is substantially the same as the upper end of the pile body 2 as shown in FIG. The state of penetration of the pile body 2 when it is located at the level of is shown.

  When the pile body 2 is penetrated while applying a downward pressure in the vertical direction to the pile body 2, for example, as shown in FIG. 17, the wire 15 is stretched along the material axis direction inside and outside the pile body 2. By pulling both ends of the wire 15 using the self-weight of the machine 12 as a reaction force, a vertically downward pressure is applied to the pile body 2, and the pile body 2 is pressed into the ground along the leader 16. FIG. 17- (a) shows the construction procedure when the ground level is located above the construction machine 12 and (b) is located below.

  The retaining wall panel 6 has a groove portion 7 into which the receiving portion 5 is inserted in the middle portion in the thickness direction on both sides in the lateral direction. The retaining wall panel 6 is dropped into the pile body 2 penetrating into the ground from above, and the groove portion 7 The receiving portions 5 are inserted into the two, so that they are held by the receiving portions 5 and 5 of the two pile main bodies 2 and 2 adjacent in the lateral direction on both sides in the lateral direction. At the same time, the retaining wall panels 6 and 6 are laterally adjacent to each other with the receiving portion 5 interposed therebetween, and the receiving portions 5 are inserted into the respective groove portions 7 so that the receiving portion 5 is concealed from the surface side of the retaining wall 1A. Exposure of the part 5 (support member 4) is avoided.

  In FIG. 1, the support member 4 formed or joined to the surface (outside) of the receiving portion 5 is inserted into the pile body 2 and joined to the pile body 2 in a state of protruding upward from the upper end of the pile body 2. The relationship between the two pile main bodies 2 and 2 which are parallel (adjacent) and the retaining wall panel 6 dropped between them when the pile main body 2 which is (fixed) is used is shown.

  In FIG. 1, since the level of the upper end surface of the pile body 2 is aligned with the level of the lower end surface of the retaining wall panel 6, the upper end surface of the pile body 2 can be a placement portion on which the retaining wall panel 6 is placed. However, the burden of the pile main body 2 by supporting the retaining wall panel 4 is eliminated by projecting a dedicated stopper 4a for supporting the retaining wall panel 4 at the upper end position of the pile body 2 of the supporting member 4 here. And deformation is prevented. The level of the upper end surface of the supporting member 4 in the case of FIG. 1 constitutes the retaining wall 1A as shown in FIG. 8, and is the highest among the retaining wall panels 6 arranged in a plurality of stages along the axial direction of the supporting member 4. It is aligned with the level of the upper end surface of the retaining wall panel 6 disposed in the upper part. In the example of FIG. 18 in which the receiving portion 5 is directly provided on the pile main body 2, the level of the upper end surface of the pile main body 2 is aligned with the level of the upper end surface of the retaining wall panel 6 arranged at the top.

  In FIG. 1, the supporting member 4 has a web connecting the flanges facing each other, and an H-shaped steel having a cross-sectional area that can be inserted into the inside of the pile body 2 is used. Although an example in the case of being joined (integrated) by filling with a filler 10 such as concrete is shown, the form (shape) of the support member 4 and the joining method to the pile body 2 are not questioned at all.

  As described above, the pile body 2 penetrates into the ground by rotation, and the pile body 2 is a steel pipe pile having a circular cross section. However, since the support member 4 does not necessarily penetrate into the ground, other than the circular cross section. Steel materials are also used. FIGS. 1 and 5 show the case where an H-shaped steel having a shape in which the receiving portion 5 is integrated is used for the support member 4, and FIGS. 2 to 4 show the case where the T-shaped steel is used for the support member 4. Since the receiving part 5 can be formed or joined to the support member 4 by integration by welding, a square steel pipe can be used as the support member 4 in addition to the steel pipe shown in FIG.

  When the support member 4 is joined to the pile main body 2 by filling the filler 10, a slat 11 for restricting the filling section of the filler 10 as shown in FIG. Is fixed by welding or the like. The support member 4 is fixed to the pile main body 2 by being filled with the filler 10 while being placed on the dam plate 11. It does not matter whether the filling material 10 is filled before the pile body 2 penetrates or after the penetration.

  When H-shaped steel is used for the support member 4, the flange located on the surface side of the retaining wall panel 6 becomes the receiving portion 5, and the groove portion 7 of the retaining wall panel 6 sandwiches the flange as the receiving portion 5 in the thickness direction. It is formed into a shape. The width in the thickness direction and the depth in the lateral direction of the retaining wall panel 6 of the groove portion 7 are determined by the shape and dimensions of the receiving portion 5.

  As shown in FIG. 1, when the support member 4 is inserted and joined to the inside of the pile body 2, when the pile body 2 penetrates in the vertical direction with respect to the ground, in principle, the shaft of the support member 4 Is parallel to the axis of the pile body 2, the retaining wall panel 6 is dropped with its in-plane direction facing the vertical direction. However, when the pile main body 2 penetrates in the direction inclined with respect to the vertical direction, the retaining wall panel 6 is dropped with the in-plane direction facing the direction inclined with respect to the vertical direction.

  Even when the pile body 2 penetrates in the vertical direction, the H-section steel used for the support member 4 is a variable cross-section H-section steel whose formation (web height) gradually decreases from the lower end to the upper end. Alternatively, when the shaft of the support member 4 is joined to the pile body 2 in a state where the axis of the support body 4 is not parallel to the axis of the pile body 2, the retaining wall panel 6 is dropped in a direction in which the in-plane direction is inclined with respect to the vertical direction. Is included.

  When the support member 4 is joined to the surface (external) of the pile body 2 as shown in FIGS. 3 and 4, the support member 4 is joined to the pile body 2 in a state where the axis of the support member 4 is not parallel to the axis of the pile body 2. In this case, the in-plane direction of the retaining wall panel 6 faces the direction inclined with respect to the vertical direction.

  The stability of the retaining wall panel 6 in the use state of the retaining wall device 1 in which the receiving part 5 holds the retaining wall panel 6 is higher as the clearance between the inner peripheral surface of the groove part 7 and the receiving part 5 is smaller. On the other hand, the contact (resistance) between the receiving part 5 and the groove part 7 when the retaining wall panel 6 is dropped with respect to the receiving part 5 is reduced, the workability of dropping the retaining wall panel 6 is improved, and both damages are suppressed. Then, it is appropriate that a clearance is secured. It is determined how much clearance is to be secured between the receiving portion 5 and the groove portion 7 in terms of stability in use and workability during construction.

  As shown in FIG. 5, the groove portion 7 is positioned on the back side of the groove portion 7, and receives the earth pressure, or earth pressure and water pressure (hereinafter referred to as earth pressure) received by the back surface of the retaining wall panel 6 from the back soil. The earth pressure transmitting portion 8 that transmits to the groove portion 7 and the concealing portion 72 that is located on the surface side of the groove portion 7 and blocks the joint between the retaining wall panels 6 and 6 that are adjacent to the retaining wall panel 6 across the receiving portion 5 in the lateral direction. The retaining wall panel 6 is sandwiched in the thickness direction.

  When the support member 4 is H-shaped steel, the earth pressure transmission part adjacent to the receiving part 5 is sandwiched between the end faces of the retaining wall panels 6 and 6 adjacent to each other in the lateral direction. Between 8 and 8, it is necessary to secure a space enough for the web to enter as shown in FIG. On the other hand, it is not necessary for any part of the support member 4 to enter between the concealing portions 9 and 9 adjacent to each other with the receiving portion 5 interposed therebetween, and the portions are not in contact with each other when the adjacent retaining wall panels 6 and 6 are relatively displaced. The distance W2 from the bottom of the groove 7 of the concealing portion 9 is the distance W1 from the bottom of the groove 7 of the earth pressure transmitting portion 8 as shown in FIG. Greater than (W1 <W2).

  The fact that the earth pressure transmission part 8 and the concealing part 9 are in the relationship of W1 <W2 applies even when the support member 4 is T-shaped steel or the like, and the receiving part 5 is as shown in FIG. In addition to the flat plate shape without the web, W1 ≧ W2 may be satisfied when the flat plate receiving portion 5 protrudes from the pile main body 2 made of a steel pipe or the support member 4.

  In addition, the earth pressure transmitting portion 8 needs to function to transmit the earth pressure received to the portion 5 while bearing the earth pressure received by the retaining wall panel 6, whereas the concealing portion 9 is basically the earth pressure. Since the pressure or the like (load) is not borne, the thickness D1 of the earth pressure transmitting portion 8 is larger than the thickness D2 of the concealing portion 9 (D1> D2). Since the earth pressure transmission part 8 and the concealing part 9 have a relationship of D1> D2 due to the difference in their functions, this relation is satisfied in principle regardless of the type of shape steel used for the support member 4.

  As shown in FIG. 1, the retaining wall panel 6 has a length straddling between the pile main bodies 2 and 2 penetrating into the ground adjacent to each other in the lateral direction, and precisely, groove portions 7 formed on both sides in the lateral direction, The horizontal length of 6 of the retaining wall panel is set so that the distance between the bottoms of 7 is the distance between the lateral end faces of the receiving portions 5 and 5 of the adjacent pile main bodies 2 and 2. . The width in the height direction of the retaining wall panel 6 is not limited by the relationship with the pile body 2 and the support member 6, and the width in the height direction is arbitrarily set.

  The illustrated retaining wall panel 6 has a shape in which the width in the height direction is smaller than the length in the horizontal direction, but the width in the height direction may be larger than the length in the horizontal direction. Further, the vertical shape of the retaining wall panel 6 is not necessarily rectangular, and may be formed in a trapezoidal shape or a polygonal shape.

  When the retaining wall panel 6 is viewed from the front surface side, the distance between the end faces of the concealing portions 9 and 9 which is the lateral length of the retaining wall panel 6 is the retaining wall panels 6 and 6 arranged adjacent to each other in the lateral direction. It depends on the width of the joints to be secured between the end faces. For example, when a joint is not formed between the adjacent retaining wall panels 6 and 6 as an extreme example, the distance between the end faces of the concealing portions 9 and 9 of the retaining wall panel 6 is substantially equal to the adjacent pile main bodies 2 and 2 ( It is equal to the distance between the center lines in the axial direction of the support members 4, 4).

  Further, when the retaining wall panel 6 is viewed from the back side, the distance between the end faces of the earth pressure transmitting portions 8 and 8 which is the lateral length of the retaining wall panel 6 is substantially equal to the adjacent pile main bodies 2 and 2. It is approximately equal to the distance between the web surfaces of the receiving portions 5 and 5 to be formed (joined).

  In the retaining wall panel 6, the receiving portions 5, 5 of the supporting members 4, 4 are fitted in the in-plane direction of the retaining wall panel 6 in the grooves 7, 7 on both sides in the lateral direction, so that the both serve as guides. In a state in which the movement in the thickness direction and the lateral direction of the steel plate is constrained, it is dropped between the adjacent pile main bodies 2 and 2 (support members 4 and 4) as shown in FIG. 1, and the height as shown in FIG. Stacked in the direction.

  The in-plane directions in which the receiving portions 5 and 5 are fitted in the groove portions 7 and 7 of the retaining wall panels 6 and 6 include the horizontal direction (horizontal direction) and the height direction (vertical direction) of the retaining wall panel 6. As shown in the figure, when the receiving portion 5 is flat, the receiving portion 5 fits in the horizontal direction and the vertical direction with respect to the groove portion 7, but the receiving portion 5 has a flat plate end side (retaining wall). Retaining wall panel which is formed into a shape in which a non-flat bar shape, a bowl shape, a wave shape or other convex portions are formed on the panel 6 side) and is in a fitted state in the height direction (vertical direction) with respect to the receiving portion 5 6 may be formed in a shape that does not come out in the horizontal direction.

  1 and 2 show a case where a support member 4 having a receiving portion 5 formed on the surface thereof is inserted into the pile main body 2 and joined to the pile main body 2 in a state of protruding upward from the upper end of the pile main body 2. An example is shown. FIG. 1 shows the case where the H-shaped steel of the supporting member 4 is used, and FIG. 2 shows the case where the T-shaped steel is used, but the shape (form) of the supporting member 4 is not limited. In addition to angle steel, flat steel (plate) as shown in FIG. 21- (b) is also used.

  3 and 4 show an example in which the support member 4 having the receiving portion 5 formed on the surface is joined to the outside (surface) of the pile body 2. 3A and 3B, when the upper end of the support member 4 is aligned with the upper end of the pile body 2 and is located at substantially the same level, FIG. The case where it protrudes upwards from an upper end is shown.

  Is the pile body 2 alone or the pile body 2 integrated with the support member 4 as described above, rotated as held (gripped) at the upper end (head) as shown in FIGS. It is penetrated into the ground by applying pressure while being rotated. After the pile main body 2 is penetrated into the ground, the retaining wall panel 6 is dropped between the support members 4 and 4 of the adjacent pile main bodies 2 and 2 as shown in FIGS.

  When the retaining wall panel 6 is dropped, the receiving portion 5 (supporting member 4) is concealed by the concealing portions 9 and 9 of the retaining wall panels 6 and 6 adjacent in the lateral direction on the surface side of the retaining wall 1A as shown in FIG. . On the back side of the retaining wall 1 </ b> A, the receiving portion 5 located between the earth pressure transmitting portions 8, 8 of the adjacent retaining wall panels 6, 6 can be engaged from the back side to the surface side of the retaining wall panel 6. . FIG. 9- (c) shows a situation in which the back soil is filled (filled) on the back surface after the top retaining wall panel 6 is dropped.

  As shown in FIG. 8, when the retaining wall panel 6 positioned at the lowermost stage among the retaining wall panels 6 stacked in a plurality of stages and constituting the retaining wall 1 </ b> A is dropped, the lower surface (bottom surface) of the retaining wall panel 6 is The fall (installation) position may be determined by contacting the surface of the natural ground (the ground surface).

  However, since the surface of the natural ground is often uneven, in order to regulate (unify) the fall (stop) position of the bottom retaining wall panel 6, the pile body 2, the support member 4, or As shown in FIG. 1, a stopper 4 a that abuts and engages with the lower surface (bottom surface) of the retaining wall panel 6 on a plane that overlaps the retaining wall panel 6 on the plane in the receiving portion 5 is provided (joined). Or it may be formed. The role of the stopper 4a is that the support member 4 protrudes above the pile main body 2 in FIG. 1 and FIG. 19 in which the upper end surface of the pile main body 2 or the pile main body 2 continues to the arrangement section of the retaining wall panel 6. The mounting portion 2a in the example of FIG.

  Since the stopper 4a supports both lateral ends of one retaining wall panel 6, the stoppers 4a are paired in units of adjacent pile bodies 2, 2 or support members 4, 4 (receiving portions 5, 5). FIG. 1 shows a case where a stopper 4a made of a plate (steel plate) is joined (welded) between flanges (flange and web) of a support member 4 projecting upward from the upper end of the pile body 2 or on the back surface of a receiving portion 5. Here, in particular, the stopper 4a is formed in a shape corresponding to the cross-sectional shape of both lateral ends of the retaining wall panel 6, and the stopper 4a is given an area capable of supporting both ends of the retaining wall panel 6 over the entire thickness. .

  As shown in FIG. 1, the stopper 4a is protruded by welding a member such as a steel material such as a plate or a flat bar to the pile body 2 or the support member 4 (receiving portion 5), or by bolting or the like. It may be formed by notching a part of the pile body 2 or the support member 4 (receiving part 5). The stopper 4a only needs to protrude from at least the pile body 2 or the like, but protrude or form a pair with the stopper 4a at a position of the retaining wall panel 6 facing the stopper 4a of the pile body 2 or the like. Sometimes it is done.

  10 and 11 show a combination example of the support member 4 and the retaining wall panel 6 at a portion where the corner portion is formed on the retaining wall 1A on a plane. 10 shows the relationship between the support member 4 and the retaining wall panel 6 in the case of the example shown in FIG. 1 in which the support member 4 is inserted and joined inside the pile body 2, and FIG. The relationship of the supporting member 4 and the retaining wall panel 6 in the case of the example shown to FIG. 3, FIG. When a corner portion is formed on the retaining wall 1A, the retaining wall panels 6 and 6 arranged in two directions are not necessarily orthogonal at the corner portion on the plane, and may intersect at an angle other than vertical.

  In FIG. 10, the H-shaped steel support member 4 positioned at the corner of the retaining wall 1 </ b> A is placed in one direction (vertical direction in the figure) of the retaining wall panels 6, 6 arranged facing two directions. The retaining wall panels 6 are arranged with the H-shaped steel web (strong axis direction) facing the thickness direction.

  At the same time, as shown in FIG. 10- (a), which is a partially enlarged view of FIG. 10 (a), a plate, a flat bar, an angle (an angle steel), etc. on the flange located on the back side of the support member 4 (H-section steel). The steel material 51 is welded, and the steel material 51 is arranged in a direction intersecting with the vertical retaining wall panel 6 (orthogonal direction in the drawing) and fitted in the groove portion 7 of the retaining wall panel 6 located near the corner portion. It also serves as the receiving part 5 to match.

  A combination of the shape of the receiving portion 5 of the support member 4 disposed at the corner portion of the retaining wall 1A and the shape of the corresponding groove portion 7 (earth pressure transmitting portion 8 and concealing portion 9) of the retaining wall panel 6 is arbitrary. There is a receiving portion 5 (steel material for the retaining wall panel 6 in the other direction on the back side of the receiving portion 5 for the retaining wall panel 6 in one direction like the support member 4 shown in the corner portion of FIG. When 51) is formed, there is an advantage that the retaining wall panels 6 and 6 in two directions can be received only by arranging the single support member 4 at the corner.

  Further, in FIG. 10, a steel material 51 (receiving portion 5) welded to a flange (receiving portion 5) located on the back side of the supporting member 4 is placed in the in-plane direction of the steel material 51 (receiving surface located on the surface side of the supporting member 4). Retaining wall panel arranged in the direction parallel to the steel material 51 by being directed in the in-plane direction (lateral direction) of the retaining wall panel 6 arranged in the direction orthogonal to the retaining wall panel 6 arranged in parallel to the part 5 The concealing portion 9 formed at the end of the steel material 51 on the side of the steel 6 is extended from the steel material 51 to the flange side positioned on the surface side of the supporting member 4, and the end of the concealing portion 9 and the surface of the supporting member 4 A corner portion panel 61 for a corner portion straddling the flange (receiving portion 5) on the side is disposed.

  The corner panel 61 shown in FIG. 10 includes an earth pressure transmission portion 61a engaged from the back side with a flange (receiving portion 5) located on the surface side of the corner portion of the support member 4 as shown in FIG. The earth pressure transmitting portion 61a is paired with a concealing portion 61b for concealing the flange (receiving portion 5) and a contact portion 61c that can come into contact with the flange on the back side from the surface side.

  Here, in particular, as shown in FIG. 10, the contact portion 61 c is held by the concealing portion 9 of the retaining wall panel 6 (sideways in the figure) held by the steel material 51 integrated with the flange on the back side of the support member 4. The corner panel is formed in a shape that can abut from the back side of the retaining wall panel 6 (can abut against the back surface of the concealing portion 9 of the retaining wall panel 6 and the flange on the back side of the support member 4 simultaneously). There is an advantage that 61 itself is pressed and held by the retaining wall panel 6 held by the steel material 51 from the front surface side to the rear surface side of the retaining wall panel 6.

  In the case of FIG. 10, the corner panel 61 sandwiches the flange (receiving part 5) of the support member 4 located on the surface side of the corner between the earth pressure transmission part 61a and the concealing part 61b, and the contact part 61c By being dropped in a state of being positioned on the back side of the concealing portion 9 of the adjacent horizontal retaining wall panel 6, the horizontal retaining wall panel 6 adjacent to the abutting portion 61 c is moved to the surface side of the retaining wall panel 6. Since it is restrained against movement, stability in the installed (dropped) state is obtained.

  FIG. 11 is a view showing a method for joining T-shaped steel support members 4 and 4 in two directions to an outer peripheral surface (surface) of a pile main body 2 using a steel pipe, which is disposed at a corner portion of a retaining wall 1A. The corner panel 61 is formed in an L shape straddling both the support members 4 and 4, and the receiving portions of the support member 4 are formed on both lateral sides in the same manner as the retaining wall panels 6 other than the corner sections. 5 shows an example where grooves 7 and 7 that can be engaged are formed.

  In the example of FIG. 11, the corner panel 61 has the groove portions 7 that can be engaged with the receiving portion 5 of the support member 4 on both sides, so that the earth pressure transmission unit is the same as the retaining wall panel 6 other than the corner panel 61. 8 and the concealing portion 9, the corner panel 61 is placed in the corner by being dropped between the adjacent supporting members 4 and 4 just like the other retaining wall panels 6. It is held by the two support members 4 and 4 of the pile body 2.

  12 and 13 show a state in which the retaining wall panel 6 excluding the corner panel 61 is supported by the adjacent support members 4 and 4. FIG. 12 shows a case where the groove 7 of the retaining wall panel 6 is formed at one place in the thickness direction, and FIG. 13 shows a case where the grooves 7 and 7 are formed at two places in the thickness direction. FIG. 12- (b) shows a single retaining wall panel 6 constituting the retaining wall 1A shown in FIG. 12 (a), and FIG. 12 (c) shows an end face of the retaining wall panel 6 in the lateral direction. FIG. 13- (b) shows one retaining wall panel 6 that constitutes the retaining wall 1A shown in FIG.

  12 and 13, a convex portion 6a is formed on the upper surface of the retaining wall panel 6 excluding the retaining wall panel 6 disposed at the uppermost portion of the retaining wall 1A, and the retaining wall panel 6 disposed at the lowermost portion is excluded. An example in which a concave portion 6b into which the convex portion 6a on the upper surface can be fitted is formed on the lower surface of the retaining wall panel 6. By forming convex portions 6a and concave portions 6b on the upper surface and the lower surface of the retaining wall panel 6 and fitting them together when stacked, the retaining wall panel 6 can be engaged in the thickness direction and the lateral direction. Therefore, stability at the time of dropping and stability after dropping (installation) are increased.

  In this case, the amount of relative displacement between the upper and lower retaining wall panels 6 and 6 is limited to a certain amount by adjusting the size of the clearance between the convex portion 6a and the concave portion 6b that are fitted to each other. By allowing relative movement up to the amount, it is possible to follow changes in the ground (ground) during an earthquake. On the other hand, when the clearance is not substantially secured between the convex portion 6a and the concave portion 6b, the relative displacement between the retaining wall panels 6 and 6 adjacent to each other in the vertical direction is difficult to occur. Will be built.

  When H-shaped steel is used for the support member 4, the support member 4 has receiving portions 5 and 5 at two locations on the front side and the back side of the retaining wall panel 6 because the flanges are positioned on both sides of the strong axis direction. become. From this, as shown in FIG. 13, when the groove portions 7 and 7 are formed in the retaining wall panel 6 in the thickness direction corresponding to the receiving portions 5 and 5 of the support member 4, two groove portions 7 are formed. , 7 can transmit the earth pressure received by the retaining wall panel 6 from the two earth pressure transmitting portions 8, 8 formed on the back surface side, so that the earth pressure from each retaining wall panel 6 to the support member 4 can be transmitted. There is an advantage that transmission ability is improved. Since the earth pressure received by the retaining wall panel 6 can be distributed to two places in the thickness direction and transmitted to the support member 4, there is also an advantage that the burden on the earth pressure transmitting portion 8 at one place is reduced.

  In FIG. 13, the shape of the grooves 7 and 7 is formed in accordance with the position and shape of the flange of the support member 4. In (a), the thickness of the concealing portion 9 formed on the surface side of the retaining wall panel 6 is Although it seems that there is no difference in the thickness of the earth pressure transmission part 8 formed in the back side of the retaining wall panel 6, the earth pressure transmission part 8 formed in the intermediate part of the groove parts 7 and 7 is formed thickly. Thus, since more earth pressure or the like can be transmitted than the earth pressure transmission unit 8 on the back side, the thickness of the earth pressure transmission unit 8 on the back side is not a problem. However, in order to prevent breakage due to the earth pressure transmission unit 8 on the back side bearing earth pressure or the like, the thickness of the earth pressure transmission unit 8 on the back side may be increased as shown in FIG. Is appropriate.

  FIG. 14 shows a state in which a retaining wall device 1A is constructed by installing the retaining wall device 1 of the present invention on the heel side adjacent to a conventional retaining wall using cobblestones. In FIG. 14, the boundary between the cobblestone retaining wall and the retaining wall 1 </ b> A of the present invention looks like a cross section of the retaining wall panel 6, but at the lateral end of the retaining wall panel 6 located at the boundary of the retaining wall 1 </ b> A. The pile body 2 (support member 4) is arranged.

  As can be seen from the comparison with the retaining wall of the cobblestone, according to the retaining wall device 1 of the present invention, the wall surface (surface) forms a vertical surface over the entire height of the retaining wall 1A or is held at an angle close to the vertical surface. The wall 1A can be configured. In addition, each retaining wall panel 6 constituting the retaining wall 1A is held by the pile main bodies 2 and 2 (support members 4 and 4) penetrating both sides in the lateral direction, so that it is on the ground surface (road surface). The site on the natural ground is secured as much as possible on the vertical extension line of the back surface position of the exposed retaining wall panel 6, and the high stability against the collapse is ensured while maximally and effectively utilizing the site on the natural mountain. .

  15 and 16 show an example of the configuration procedure of the retaining wall 1A shown in FIG. 14, for example. FIG. 15 shows a procedure for embankment in which the back wall of the retaining wall panel 6 is filled (backfilled) when the retaining wall 1A is constituted by the cutting procedure for removing the earth and sand on the surface side of the retaining wall panel 6. This is a case where the retaining wall 1A is configured.

  The construction procedure shown in FIG. 15 is suitable for expanding the road width, or for restoring the road after a landslide that has caused the landslide to cover the road. The construction procedure shown in FIG. Suitable for expanding

  FIG. 18 shows the outer peripheral surface (surface) of the pile body 2 made of a steel pipe by connecting (extending) the pile body 2 to the level of the upper end of the retaining wall panel 6 without joining the support member 4 to the pile body 2 as described above. ) Shows a combination example of the pile main body 2 and the two retaining wall panels 6 and 6 held by the plate body 2 when the flat receiving portions 5 and 5 using plates or the like are directly provided. FIG. 18- (b) shows the plane or horizontal section of (a). Here, although the receiving part 5 is joined (welded) to the pile main body 2 so that the center line of the thickness direction of the receiving part 5 is located on the center line on the cross section of the pile main body 2, FIG. As shown in FIG. 3, the receiving portion 5 may be brought close to and joined to either side of the retaining wall panel 6 in the thickness direction.

  As shown in FIG. 18, if the center line in the thickness direction of the receiving part 5 is located on the center line on the cross section of the pile body 2, the horizontal cross-sectional shape of the retaining wall panel 6 is the groove part 7 as shown in FIG. The shape is symmetrical in the thickness direction across the center, and the thickness of the earth pressure transmitting portion 8 and the concealing portion 9 is equal. On the other hand, for example, as shown in FIG. 21- (a), if the receiving part 5 is displaced and joined to the surface side of the retaining wall panel 6, the thickness of the earth pressure transmitting part 8 is made larger than the thickness of the concealing part 9. It is possible to increase the stability against breakage and deformation caused by the earth pressure transmission portion 8 receiving earth pressure or the like.

  In FIG. 18 and FIG. 21- (a), shapes other than the groove part 7 of the end surface of the retaining wall panel 6 are formed in the curved shape corresponding to the cross-sectional shape of the pile main body 2 or the support member 4, but earth pressure transmission Since the part 8 does not need to conceal the pile main body 2 or the support member 4, it does not necessarily have a shape in which the end faces of the adjacent retaining wall panels 6 and 6 are close to each other. In the case of FIG. 18, the pile body 2 continues to the level of the upper end of the retaining wall panel 6, so that the retaining wall panel 6 can be supported by the pile body 2 alone, such as the upper end surface of the pile body 2 in the example of FIG. 1. Since a convex part is not formed, the mounting part 2a for supporting the retaining wall panel 6 projects from the surface of the pile body 2 or the level of the lower end of the retaining wall panel 6 of the receiving part 5.

  FIG. 19 shows that the support member 4 made of a steel pipe protruding upward from the upper end of the pile body 2 is joined to the height of the arrangement section of the retaining wall panel 6, and a plate or the like is attached to the outer peripheral surface (surface) of the protruding support member 4. An example of a combination of the pile main body 2 and the support member 4 and the two retaining wall panels 6 and 6 held by the support member 4 when the flat plate-like receiving parts 5 and 5 are used is shown. Yes. The support member 4 is joined to the inside of the pile body 2 by welding or the like within the insertion section (overlap allowance) in a state of being inserted into the pile body 2. FIG. 19- (b) shows the plane or horizontal section of (a). Here, the receiving part 5 is joined (welded) to the support member 4 so that the center line in the thickness direction of the receiving part 5 is located on the center line on the cross section of the pile body 2. The panel 6 may be joined to either side in the thickness direction.

  In the example of FIG. 19, the support member 4 protrudes upward from the upper end of the pile body 2, and includes the case where the support member 4 has a size inscribed in the pile body 2 as illustrated, before the retaining wall panel 6 is dropped. Since the upper end surface of the pile main body 2 is exposed in this state, the upper end surface of the pile main body 2 can be used as a mounting portion for supporting the retaining wall panel 6, so that the mounting portion 2 a in FIG. There is no need to weld it separately.

  In the example shown in FIGS. 18 and 19, the length of the retaining wall panel 6 with the length of the section (the receiving portion 5) supporting the retaining wall panel 6 at the upper end portion of the pile body 2 and the upper end portion of the supporting member 4 is the height. However, the length from the placing portion 2a to the upper end portion of the pile body 2 in FIG. 18 and the length from the stopper 4a to the upper end portion of the support member 4 in FIG. It has a size corresponding to the height of the plurality of retaining wall panels 6. 8, 9, and 14 show the height of the retaining wall panel 6 having a length of three sections (the receiving portion 5) that supports the retaining wall panel 6 at the upper end of the pile body 2 or the upper end of the support member 4. An example in the case of having a size of a minute is shown.

  20 replaces the support member 4 using the steel pipe in FIG. 19 with a support member 4 consisting only of a plate serving as the receiving portion 5, or a support member having a rib 4b for bending and stiffening the plate. 4 shows an example of a combination of the support member 4 and the retaining wall panels 6 and 6 when 4 is joined in the insertion section to the pile body 2 in a state where 4 is protruded upward from the upper end portion of the pile body 2. FIG. 20- (b) shows the plane or horizontal section of (a). In this example, the receiving portion 5 can be joined (welded) to the support member 4 with the center line in the thickness direction of the receiving portion 5 positioned on the center line on the cross section of the pile body 2. The wall panel 6 may be joined to either side in the thickness direction.

  FIG. 20- (c) shows a variation of (b), in which plates serving as receiving portions 5 are supported by butt welding or the like on both sides of a steel bar such as a round steel or deformed reinforcing bar instead of the rib 4b in (a) and (b). The example at the time of forming the member 4 is shown. Thus, the support member 4 having the receiving portion 5 as a basic element is formed in an arbitrary shape by an arbitrary method.

  21- (a) and (b), as described above, the center line in the thickness direction of the receiving portion 5 is brought closer to the thickness direction surface side of the retaining wall panel 6 with respect to the center line on the cross section of the pile body 2. In this example, the receiving portion 5 is joined to the support member 4 or the pile main body 2 and the thickness of the earth pressure transmission portion 8 is relatively larger than the thickness of the concealing portion 9. (A) is a case where a plate or the like as the receiving portion 5 is welded to the surface of the supporting member 4 made of a steel pipe, and (b) is an example in which the supporting member 4 is composed only of the receiving portion 5. A rib 4b may be added to the receiving portion 5 as shown in FIG.

  FIG. 22 restrains the relative displacement deformation in the out-of-plane direction between the retaining wall panels 6, 6 on the upper surface of the retaining wall panels 6, 6 adjacent to each other with the support member 4 interposed therebetween. The headboard 43 for protecting the upper end surface from damage is disposed, and the stability of the retaining wall panels 6 and 6 adjacent to each other is secured by increasing the stability against the out-of-plane rampage of each retaining wall panel 6. An example is shown below.

  In FIG. 22, in the state where the headboard 43 is installed, the inner peripheral surface of the headboard 43 is in a straight line contact, and the stability of the headboard 43 in the installed state is easily obtained. An example is shown. Here, a cap 41 which is inscribed therein is dropped into the open upper end of the square steel pipe which is the support member 4, and is joined to the square steel pipe in a fitted state, and the cap 43 is attached to the cap 41 with a bolt 42 or the like. It is joined.

  The cap 41 is supported by a frictional force in an inscribed (fitted) state by being struck from above with respect to the support member 4 of the square steel pipe, or by welding (adhering), or by some mechanical device such as a bolt. By using the means, they are detachably or integrally joined. In FIG. 22, the headboard 43 passes through the insertion hole 43 a formed therein and is joined to the bolt hole 41 a formed in the cap 41 by the bolt 42. However, the headboard 43 may be joined to the retaining wall panel 6. The means for joining to the cap 4 or the retaining wall panel 6 is not necessarily required by the bolt 42. In the case of FIG. 22, a seal for preventing the entry of water is applied to the joint portion by the bolt 42 or the like. The inside of the square steel pipe as the support member 4 is filled with mortar, concrete or the like in order to increase the bending rigidity of the support member 4 and to improve the stability against deformation in the state where the adjacent retaining wall panels 6 and 6 are supported. The material may be filled. In this case, the cap 41 is joined to the support member 4 by welding or the like after filling with the filler.

  As the headboard 43, a steel material such as a grooved steel, an angle steel, a plate (flat steel) or the like as shown in the figure or a combination thereof, concrete (precast concrete), stone, ceramics, hard rubber, or the like is used. The cross-sectional shape of the headboard 43 is preferably formed in a groove shape so that the retaining wall panel 6 can be sandwiched in the thickness direction from both sides in the width direction of the headboard 43. The headboard 43 may be disposed continuously across the plurality of retaining wall panels 6 in the lateral direction of the retaining wall panel 6, but straddles at least the retaining wall panels 6, 6 adjacent to each other with the support member 4 interposed therebetween. By being partially arranged in the range, the retaining wall panels 6 and 6 that are adjacent to each other are secured so that each retaining wall panel 6 is restrained in the out-of-plane direction and does not act independently of each other.

  In FIG. 22, receiving portions 5, 5 made of plates or flat steel are provided on the side surfaces on both sides of the square steel pipes constituting the support member 4 in the axial direction of the square steel pipes. In order to make the back surface of the retaining wall panel 6 and the back surface of the square steel pipe (supporting member 4) continuous (to be flush with each other) while forming the concealing portion 9 on the front side so as to wrap around the surface side of the square steel pipe, The earth pressure transmission part 8 on the side is abutted against the side surface of the square steel pipe. However, the earth pressure transmission part 8 of the retaining wall panel 6 may wrap around the back side of the square steel pipe and contact the back side of the square steel pipe in the same manner as the concealment part 9. In the case of FIG. 22, the inner peripheral surface of the headboard 43 is inscribed in the rear surface of the retaining wall panel 6 and the rear surface of the square steel pipe (supporting member 4) so that the supporting member 4 and the retaining wall panels 6 and 6 located on both sides thereof are integrated. It works to make it act.

  23 uses the retaining wall device 1 in which the headboard 43 shown in FIG. 22 is installed on the retaining wall panel 6 and the support member 4 as a soil retaining retaining wall of a natural mountain facing the road, and the surface side of the retaining wall device 1 Shows an example of construction when a road is laid. FIG. 24 shows a longitudinal section of FIG. In this example, a rock fall protection fence 1 </ b> B for preventing rock fall on the surface side (road side) of the retaining wall device 1 is installed on the headboard 43. Here, in accordance with the topography of the natural ground, the retaining wall device 1 is installed on the downstream side of the natural ground as an earth retaining retaining wall under the road. 23 and 24 show a state in which the tip of the pile body 2 penetrates into the hard layer (ground).

  In FIG. 23, the surface of the retaining wall 1A is arranged in a planar shape and the road is laid in a straight line, but depending on the setting of the projecting positions of the receiving portions 5, 5, the pile body 2 or Since any angle can be given between the surfaces of the retaining wall panels 6 and 6 adjacent to each other with the support member 4 interposed therebetween, the entire retaining wall 1A of the retaining wall device 1 can be formed in a curved shape. Yes, it is possible to lay the road in a curved line.

1 ... Retaining wall device, 1A ... Retaining wall, 1B ... Falling rock guard,
2 ... Pile body, 2a ... Placement part, 3 ... Excavation blade,
4 ... support member, 4a ... stopper, 4b ... rib,
41... Cap, 41 a... Bolt hole, 42... Bolt, 43.
5 …… Receiver, 51 …… Steel,
6 ... Retaining wall panel, 6a ... Convex part, 6b ... Concave part,
61 …… Corner panel,
61a: Earth pressure transmission part, 61b: Concealment part, 61c: Contact part,
7 ... groove, 8 ... earth pressure transmission part, 9 ... concealment part,
10 ... filler, 11 ... sill board,
12 …… Construction machine,
13 ... arm, 14 ... motor, 15 ... wire, 16 ... reader.

In the retaining wall device according to the first aspect of the present invention, the tip is open, exposed from the tip to the surface of the tip , and a spirally continuous excavating blade is projected on the surface, in a section near the upper end. , have a receiving portion to resist soil pressure from the rear soil present on the back side, that given a rotational force in the axial direction in the upper end portion side, and the pile body to penetrate into the ground while rotating, the pile A retaining wall panel that is held in an out-of-plane engagement state with the receiving portion of the main body, receives earth pressure from the back soil, and a plurality of sheets constitute a retaining wall.
The pile body has a cylindrical shape with a circular cross section or a cross section close to the entire length of the section penetrating into the ground, and only transmits the earth pressure received from the retaining wall panel through the receiving portion to the ground. Has a penetration depth,
The receiving portion is formed on or joined to a support member that is continuous with the pile main body or has an overlap margin and is joined to the pile main body,
The retaining wall panel has a groove part in which the receiving part is inserted in the middle part in the thickness direction on both sides in the lateral direction, and is dropped from above with respect to the pile main body penetrating into the ground, and into the groove part It is assumed that the receiving part is inserted into the receiving parts of the two pile main bodies that are adjacent in the horizontal direction on both sides in the horizontal direction.

“The receiving part is directly joined to the surface of the pile main body” means that, for example, a steel material (including the support member 4) such as a steel plate is welded to the surface of the steel pipe 2 constituting the pile main body 2 as shown in FIG. Is added (joined).

Claims (3)

A drilling blade that is exposed in a spiral shape from the tip to the surface of the tip is protruded and has a receiving portion that resists earth pressure from the back soil existing on the back side in a section near the upper end. A pile body, and a retaining wall panel that is held in an out-of-plane engagement state with the receiving portion of the pile body, receives earth pressure from the back soil, and collects a plurality of sheets to form a retaining wall. ,
The pile body is given a rotational force around the axis on the upper end side, penetrates into the ground while rotating,
The retaining wall panel has a groove part in which the receiving part is inserted in the middle part in the thickness direction on both sides in the lateral direction, and is dropped from above with respect to the pile main body penetrating into the ground, and into the groove part The retaining wall device, wherein the receiving portion is inserted and held by the receiving portions of the two pile main bodies adjacent in the lateral direction on both sides in the lateral direction.   The support member formed or joined to the surface of the receiving portion is inserted into the pile body, and is joined to the pile body in a state of protruding upward from the upper end of the pile body. The retaining wall device according to claim 1. The retaining wall device according to claim 1, wherein the receiving portion is formed or joined to a surface of a section near the upper end portion of the pile body.

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