JP6690118B2 - Retaining wall - Google Patents

Description

The present invention relates to a retaining wall including a steel sheet pile, a steel pipe sheet pile, and a joint structure connecting the steel sheet pile and the steel pipe sheet pile.

  Conventionally, for the purpose of constructing a retaining wall by driving a steel sheet pile between a plurality of steel pipe sheet piles that have been installed at predetermined intervals, the steel pipe sheet pile and steel disclosed in Non-Patent Document 1 A combination retaining wall with a sheet pile is proposed.

  Further, even if there is some construction error in the interval between the steel pipe sheet piles, the steel pipe sheet pile and the steel sheet pile are directly connected to each other for the purpose of enabling the construction of a connection wall structure having excellent workability. The connection wall structure of the steel pipe sheet pile and the steel sheet pile disclosed in 1 is proposed.

  The combined retaining wall of the steel pipe sheet pile and the steel sheet pile disclosed in Non-Patent Document 1 is constructed by connecting the joint portion of the steel sheet pile to the joint portion fixedly provided to the plurality of steel pipe sheet piles. Further, in the connecting wall structure of the steel pipe sheet pile and the steel sheet pile disclosed in Patent Document 1, a play for absorbing a construction error between the steel pipe sheet piles is provided in the connecting portion between the steel pipe sheet piles and the steel sheet pile, The slit of the connecting member attached to the side portion of the sheet pile is for fitting the joint portion of the steel sheet pile provided with the stopper member in the longitudinal direction.

ArcelorMittal (Intermediary sheet piles: triple PU18) <URL: http://www.arcelormittal.com/sheetpiling/page/index/name/tubular-piles>

Patent No. 4998646

  However, in the combined retaining wall of the steel pipe sheet pile and the steel sheet pile disclosed in Non-Patent Document 1, a joint portion fixed to a side portion of the steel pipe sheet pile is provided with a play for absorbing a construction error between the steel pipe sheet piles. However, due to a construction error in the interval between the steel pipe sheet piles, the joint parts compete with each other when connecting the joint parts of the steel pipe sheet pile to the joint parts of the steel pipe sheet pile, and the construction of the steel sheet pile is remarkable. There was a problem that it would be difficult.

  The connection wall structure of the steel pipe sheet pile and the steel sheet pile disclosed in Patent Document 1 has a play for absorbing a construction error between the steel pipe sheet piles at the connecting portion between the steel pipe sheet piles and the steel sheet piles, and thus, It prevents the bidding between the connecting member and the joint part of the steel sheet pile, and even if there is a construction error in the interval between the steel pipe sheet piles, the steel sheet pile can be smoothly placed. It will be possible.

  Further, in the connecting wall structure of the steel pipe sheet pile and the steel sheet pile disclosed in Patent Document 1, the stopper member is provided at the joint portion of the steel sheet pile, so that the joint portion of the steel sheet pile is prevented from being separated from the connecting member of the steel pipe sheet pile. To be done. However, in the connecting wall structure of a steel pipe sheet pile and a steel sheet pile disclosed in Patent Document 1, the earth pressure acting on the steel sheet pile is transmitted from the joint portion of the steel sheet pile to the connecting member of the steel pipe sheet pile, so that the connecting member of the steel pipe sheet pile is connected. When the deformation that expands becomes large, the joint portion of the steel sheet pile may be separated from the connecting member of the steel pipe sheet pile.

Therefore, the present invention has been devised in view of the above-mentioned problems, and the purpose thereof is to utilize the fact that earth pressure acts from the back side of the retaining wall to deform the steel sheet pile. An object of the present invention is to provide a retaining wall that can firmly maintain the connection state between the steel sheet pile and the steel pipe sheet pile by suppressing the deformation of the connecting member of the steel pipe sheet pile that expands.

Retaining wall according to the first invention is a retaining wall comprising a steel sheet pile and the steel pipe sheet piles, and a joint structure for connecting the these sheet piles and steel sheet pile, the connecting member extending in the axial direction of the main tube of steel sheet piles And a hat-shaped or Z-shaped steel sheet pile connected to the connecting member, wherein the connecting member is connected to the main body portion attached to the outer surface of the main body pipe of the steel pipe sheet pile and the axial direction of the main body portion. and a slit portion formed, the steel sheet pile is disposed on the back surface side, and a rear portion of the soil pressure from the rear side is applied, provided extending across or RaTadashi surface of the rear portion A web portion and a connecting portion that is provided at one end of the web portion and that is inserted into the body portion, and earth pressure acts on the back surface portion so that the connecting portion expands in the width direction of the steel sheet pile. it is, on the inside of the main body portion of the connecting portion an end portion of the main body portion on the positive side is inserted direction So as to push Te, the proximity face on the positive side was sandwiched between the slit portion, the slip process is performed, and at least one of the protruding member is attached, the resistance unit is provided the resistance unit is characterized Rukoto provided only in the proximity face on the front side.

A retaining wall according to a second aspect of the present invention is characterized in that, in the first aspect, the resistance portion is provided by subjecting only the non- slip process to the proximity surface.

Retaining wall according to the third invention, Oite the first shot bright, the resistor unit includes a feature that only the projecting member to be engaged on the outside of the main body portion is provided by being attached to the adjacent surface To do.

A retaining wall according to a fourth invention is characterized in that, in any one of the first invention to the third invention, the resistance portion is intermittently provided in the proximal surface in the axial direction of the steel sheet pile.

Retaining wall according to the fifth invention, in any one of the first invention to fourth invention, wherein the resistor unit has a difference in height between the high ground surface and the lower front side ground surface of the back surface side of the retaining wall height when, in the axial direction of the steel sheet pile, only in the range of lower than the range from the ground surface of the rear side up to half of the retaining wall height, and which are located in the proximity surface.

A retaining wall according to a sixth aspect of the present invention is the retaining wall according to any one of the first to fifth aspects, wherein the connecting member has a tangent line of the main body portion at an attachment point where the slit portion and the proximity surface face each other. The slit portion is formed so as to be substantially orthogonal to the adjacent surface.

  According to the first invention to the sixth invention, since the predetermined resistance portion is provided on the adjacent surface of the steel sheet pile, a frictional resistance force or a pushing force acts on the end portion on the front side of the main body portion, so that the main body portion Since the deformation that spreads can be suppressed, the slit portion of the connecting member is prevented from expanding and the joint portion of the steel sheet pile is not separated from the main body portion of the connecting member. It is possible to firmly maintain the connection state with.

  According to the first invention to the sixth invention, it is possible to maintain the connection state between the steel sheet pile and the steel pipe sheet pile by utilizing the fact that the earth pressure acts from the back side of the retaining wall to deform the steel sheet pile. Therefore, it is possible to suppress the deformation such as expansion of the connecting member without increasing the plate thickness of the connecting member of the steel pipe sheet pile more than necessary, and to reduce the plate thickness of the connecting member to construct the retaining wall. It is possible to reduce the material cost of the required connecting member.

  Particularly, according to the fourth aspect of the invention, the resistance portion is intermittently provided in the axial direction of the steel sheet pile, thereby reducing the usage amount of the projecting member such as the steel rod attached to the adjacent surface and the amount of the anti-slip processing. Therefore, it is possible to reduce the material cost of the protruding member and the processing cost of the slip prevention processing.

  In particular, according to the fifth invention, the resistance portion such as the protruding member is provided on the steel sheet pile only in the range lower than the range from the high ground surface on the back side of the retaining wall to the half of the retaining wall height. By doing so, it is possible to firmly maintain the connection state between the steel sheet pile and the steel pipe sheet pile, while reducing the usage amount of the protruding member such as the steel rod and the construction amount of the slip prevention processing. Therefore, it is possible to reduce the material cost of the protruding member and the processing cost of the non-slip processing.

  In particular, according to the sixth aspect of the invention, the tangent line contacting the surface of the front end of the main body at the attachment location where the slit portion of the connecting member and the adjacent surface of the steel sheet pile are opposed to the adjacent surface of the steel sheet pile. By forming the slit portion of the connecting member so as to be substantially orthogonal, a frictional resistance force or a pushing force acts from the side of the end portion on the front side of the main body portion, and the front side of the main body portion As the end portion can be efficiently pushed inward, it is possible to reliably suppress the expansion of the main body portion in the connecting member of the steel pipe sheet pile.

It is a perspective view showing a retaining wall which uses a joint structure which connects a steel sheet pile and a steel pipe sheet pile to which the present invention is applied. It is a side view which shows the retaining wall in which the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied is used. (A) is a top view which shows the retaining wall in which the hat-shaped steel sheet pile was used as a steel sheet pile in the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied, and (b) is the front view. Is. It is a perspective view showing a joint structure which connects a steel sheet pile and a steel pipe sheet pile to which the present invention is applied. (A) is a top view which shows the connection member of the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied, and (b) is the front view. It is a top view which shows the steel sheet pile of a hat-shaped steel sheet pile in the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied. It is a top view which shows the steel sheet pile of a U-shaped steel sheet pile in the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied. It is a top view which shows the steel sheet pile of Z type steel sheet pile in the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied. (A) is a plan view showing a non-slip process in which a proximity surface is sparsely cut by a joint structure for connecting a steel sheet pile and a steel pipe sheet pile to which the present invention is applied, and (b) is a plan view showing mortar or the like on the proximity surface. It is a top view which shows the anti-slip process which was sparsely piled up. (A) is a top view which shows the anti-slip process which provided the welding bead on the proximity surface in the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention was applied, and (b) is a processing plate on the proximity surface. It is a top view which shows the anti-slip process which attached. (A) is a top view which shows the projecting member which attached the round steel rod to the proximity surface in the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied, and (b) is a groove-shaped proximity surface. It is a top view which shows the protrusion member which attached the steel. It is a top view which shows the protrusion member which has arrange | positioned the web of channel steel in the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied, on the outer side of the main body part. It is a top view which shows the protrusion member which has arrange | positioned one side of chevron steel outside the main-body part in the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied. It is a top view which shows the steel sheet pile which deform | transforms by the earth pressure which acts from the back part in the joint structure which connects the steel sheet pile and the steel pipe sheet pile to which this invention is applied. (A) is a top view which shows the external force which acts on the front side of a main-body part in the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied, (b) is a conventional connection wall structure, and external force. It is a top view which shows the slit part expanded by. (A) is a joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied, and is a top view which shows the frictional resistance force which acts on the front side of a main-body part by the slip prevention process of a hat-shaped steel sheet pile, FIG. 7B is a plan view showing a pushing force applied to the front side of the main body by the projecting member of the hat-shaped steel sheet pile. (A) is a joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied, and is a top view which shows the frictional resistance force which acts from the side of a main part by the slip prevention process of a hat-shaped steel sheet pile, [Fig. 4] is a plan view showing a pushing force acting from the side of the main body portion by the projecting member of the hat-shaped steel sheet pile. (A) is a joint structure which connects the steel sheet pile and steel pipe sheet pile which applied this invention, and is a top view which shows the frictional resistance force which acts from the side of a main-body part by the non-slip process of U-shaped steel sheet pile, [Fig. 4] is a plan view showing a pushing force acting from the side of the main body portion by the protruding member of the U-shaped steel sheet pile. (A) is a top view which shows the frictional resistance force which acts from the side of the main body of the connection member of a hot push joint in the joint structure which connects the steel sheet pile and steel pipe sheet pile to which this invention is applied, (b) is FIG. 6 is a plan view showing a pushing force acting from the side of the main body of the connecting member of the hot pressing joint. It is a front view which shows the resistance part axially continuously or intermittently provided in the adjacent surface of a steel sheet pile with the joint structure which connects the steel sheet pile and the steel pipe sheet pile to which this invention is applied. It is a side view showing distribution of active earth pressure which acts from the back side of a retaining wall in a joint structure which connects a steel sheet pile and a steel pipe sheet pile to which the present invention is applied.

  Hereinafter, a mode for carrying out a joint structure 1 for connecting a steel sheet pile and a steel pipe sheet pile to which the present invention is applied will be described in detail with reference to the drawings.

  As shown in FIG. 1, a joint structure 1 for connecting a steel sheet pile and a steel pipe sheet pile to which the present invention is applied has a retaining wall of a combination of a steel pipe sheet pile 4 and a steel sheet pile 3 in which a steel sheet pile 3 and a steel pipe sheet pile 4 are combined. Used to build 8. The retaining wall 8 is mainly provided with the steel pipe sheet pile 4 as a pile member and the steel sheet pile 3 as a wall member.

  The retaining wall 8 is provided with, for example, a plurality of steel sheet piles 3 arranged in the width direction X as a wall member, and at each of both ends of the plurality of steel sheet piles 3 provided as wall members in the width direction X, the supporting ground. The steel pipe sheet pile 4 is provided as a pile member up to the depth of reaching.

  As shown in FIG. 2, the retaining wall 8 is provided as a seawall or the like at the boundary between the ocean or river and the existing ground or the backfilled ground. The retaining wall 8 is constructed such that the front ground 81 such as the ocean or the river is the front side A, and the back ground 82 such as the existing ground or the backfilled ground is the back side B.

  The retaining wall 8 is provided at the boundary between the front ground 81 having a low ground surface 81a and the back ground 82 having a high ground surface 82a, so that the groundwater pressure from the back surface side B to the front surface side A in the depth direction Y is increased. The earth pressure P acts from the back ground 82.

  When the number of the steel sheet piles 3 between the steel pipe sheet piles 4 is one and the spacing between the steel pipe sheet piles 4 is narrow, the retaining wall 8 is mainly provided with the steel pipe sheet piles 4 provided as pile members from the rear ground 82. The steel sheet pile 3 provided as a wall member resists the acting groundwater pressure or earth pressure P and plays a role of preventing sediment outflow from the back side B and stopping water. However, in the retaining wall 8, when the distance between the steel pipe sheet piles 4 becomes wider due to the increase in the number of the steel sheet piles 3 between the steel pipe sheet piles 4, the steel sheet pile 3 provided as the wall member acts from the back ground 82. It also plays a role of resisting the groundwater pressure and the earth pressure P, and the groundwater pressure and the earth pressure P applied to the steel sheet pile 3 increase, so that the bending of the steel sheet pile 3 in the depth direction Y also increases.

  As shown in FIG. 3, the steel pipe sheet pile 4 has the wall height direction of the retaining wall 8 as the axial direction Z, and is attached to the main pipe 40 of a large-diameter steel pipe having a substantially circular cross section or the like with a substantially circular cross section or the like. The small diameter steel pipe connecting member 2 is attached by welding or the like. In the steel pipe sheet pile 4, the connecting member 2 is attached to the outer surface 40a of the main body pipe 40 so as to extend along the axial direction Z of the main body pipe 40 at each of one end or both ends in the width direction X.

  In the steel pipe sheet pile 4, for example, the outer diameter D1 of the main body pipe 40 is about 1000 mm to 1500 mm, and the plate thickness t1 is about 9 mm to 20 mm. Further, in the steel pipe sheet pile 4, for example, the outer diameter D2 of the connecting member 2 is about 100 mm to 200 mm, and the plate thickness t2 is about 9 mm to 20 mm.

  As shown in FIG. 4, a joint structure 1 for connecting a steel sheet pile and a steel pipe sheet pile to which the present invention is applied is for combining a steel sheet pile 3 and a steel pipe sheet pile 4 with each other to form a retaining wall 8. The connecting member 2 extending in the axial direction Z of the main body tube 40 of the sheet pile 4 and the steel sheet pile 3 connected to the connecting member 2 are provided.

  The connecting member 2 has a main body portion 20 attached to the outer surface 40a of the main body pipe 40 of the steel pipe sheet pile 4, and a slit portion 21 formed continuously in the axial direction Z of the main body portion 20. The main body 20 of the connecting member 2 is welded to the outer surface 40 a of the main body tube 40 continuously or intermittently in the axial direction Z.

  As shown in FIG. 5, a part of the slit portion 21 in the circumferential direction of the connecting member 2 is cut out with a predetermined width by cutting or the like, so that both end portions 20a of the main body portion 20 in the circumferential direction have a predetermined width. It is formed continuously along the axial direction Z of the main body 20 so as to be separated by the separation distance d.

  As shown in FIG. 6, the steel sheet pile 3 includes, for example, a flange portion 30, a pair of web portions 32, a pair of arm portions 33, and a pair of joint portions 34 when a hat-shaped steel sheet pile is used. Will have. The steel sheet pile 3 is not limited to this, and a U-shaped steel sheet pile, a Z-shaped steel sheet pile, or the like may be used. In the steel sheet pile 3, the plurality of steel sheet piles 3 arranged in the width direction X are connected by fitting the joint portions 34 of each other.

  The steel sheet pile 3 has a flange portion 30 extending in the width direction X, and each web portion 32 is formed at each of both ends of the flange portion 30 in the width direction X so as to be inclined in the depth direction Y. Further, in the steel sheet pile 3, each arm portion 33 is formed at one end of each web portion 32 in the depth direction Y, and each joint portion 34 is formed at the tip of each arm portion 33.

  In the steel sheet pile 3, the flange portion 30 extending in the width direction X is disposed on the back surface side B of the retaining wall 8 as a rear surface portion 31 on which the earth pressure P acts, and the front side A of the retaining wall 8 is formed from both ends of the rear surface portion 31. And a web portion 32 is provided. In the steel sheet pile 3, the arm portion 33 and the joint portion 34 are used as the joint portion 35 provided at one end of the web portion 32, and the joint portion 34 of the joint portion 35 is inserted into the main body portion 20 of the joint member 2.

  As shown in FIG. 7, when the U-shaped steel sheet pile is used, the steel sheet pile 3 has a flange portion 30, a pair of web portions 32, and a pair of joint portions 34. In the steel sheet pile 3, the flange portion 30 arranged on the rear surface side B of the retaining wall 8 is used as the rear surface portion 31, and each joint portion 34 formed at one end of each web portion 32 in the depth direction Y is connected to the web portion 32. The connecting portion 35 is provided at one end of the.

  As shown in FIG. 8, the steel sheet pile 3 has a web portion 32, a pair of arm portions 33, and a pair of joint portions 34 when a Z-shaped steel sheet pile is used. In the steel sheet pile 3, the arm portion 33 arranged on the rear surface side B of the retaining wall 8 is used as the rear surface portion 31, and the arm portion 33 and the joint portion 34 arranged on the front surface side A are provided at one end of the web portion 32. Part 35.

  As shown in FIG. 9, the steel sheet pile 3 is configured such that the joint portion 34 of the joint portion 35 is slid in the main body portion 20 of the joint member 2 of the steel pipe sheet pile 4 in the axial direction Z so as to be inserted therethrough. 35 is connected to the connecting member 2 of the steel pipe sheet pile 4. In the steel sheet pile 3, the arm portion 33 of the connecting portion 35 is sandwiched by the slit portion 21 of the connecting member 2 by inserting the joint portion 34 of the connecting portion 35 into the main body portion 20 of the connecting member 2.

  The steel sheet pile 3 has, on the front side A of the retaining wall 8, an arm portion 33 sandwiched between the slit portions 21 of the connecting member 2 and a proximity surface 3a close to the end surface 21a on the front side A of the slit portion 21. Become. In the steel sheet pile 3, the end surface 21a on the front side A of the slit portion 21 and the proximity surface 3a are in contact with each other, but the invention is not limited to this, and the end surface 21a on the front side A of the slit portion 21 and the proximity surface 3a are not limited to this. May be slightly separated.

  In the steel sheet pile 3, the resistance portion 5 is provided by subjecting the proximity surface 3a on the front side A of the retaining wall 8 to slip prevention processing for increasing the surface roughness as compared with a normal steel sheet or the like. . At this time, in the steel sheet pile 3, the end surface 21a on the front side A of the slit portion 21 and the adjacent surface 3a are brought into contact with each other.

  As shown in FIG. 9A, the non-slip process performed on the proximity surface 3a of the steel sheet pile 3 is a shot blast in which abrasive grains such as stones or metals are sprayed onto the proximity surface 3a, and the proximity surface 3a is sparsely cut. As a result, the surface roughness of the adjacent surface 3a is increased.

  Further, as shown in FIG. 9B, the anti-slip process applied to the proximity surface 3a of the steel sheet pile 3 is performed by spraying a metal such as aluminum or mortar onto the proximity surface 3a. By increasing the height, the surface roughness of the adjacent surface 3a may be increased.

  As shown in FIG. 10 (a), the non-slip process performed on the proximity surface 3a of the steel sheet pile 3 is performed by providing one or a plurality of welding beads 5a extending in the axial direction Z on the proximity surface 3a and bringing the welding beads 5a into proximity. The surface roughness of the adjacent surface 3a may be increased by filling the surface 3a.

  Further, as shown in FIG. 10 (b), the non-slip processing applied to the proximity surface 3a of the steel sheet pile 3 is performed by attaching a processing plate 5b extending in the axial direction Z and having an uneven surface to the proximity surface 3a. Alternatively, the surface roughness of the adjacent surface 3a may be increased by manufacturing the steel sheet pile 3 having the uneven surface formed on the adjacent surface 3a by rolling or the like.

  As shown in FIGS. 11 to 13, the steel sheet pile 3 is configured such that the protruding member 50 that is locked to the outside of the end 20 a of the main body 20 is attached to the proximity surface 3 a on the front side A of the retaining wall 8. The protruding resistance part 5 is provided. At this time, in the steel sheet pile 3, the end surface 21a on the front side A of the slit portion 21 and the adjacent surface 3a are slightly separated or abutted.

  As shown in FIG. 11A, the projecting member 50 has a reinforcing bar or a round steel bar 51 extending in the axial direction Z attached to the adjacent surface 3 a of the steel sheet pile 3 by welding or the like. Further, as shown in FIG. 11B, in the projecting member 50, the channel steel 52 extending in the axial direction Z is attached to the adjacent surface 3 a of the steel sheet pile 3, and one flange 52 a of the channel steel 52 is provided. The flange 52b on the other side of the channel steel 52 may be arranged outside the end 20a of the main body 20 and inside the end 20a of the main body 20.

  The protruding member 50 arranges the web 52c of the grooved steel 52 outside the end 20a of the main body 20, as shown in FIG. 12, when the grooved steel 52 is attached to the adjacent surface 3a of the steel sheet pile 3. May be Further, in the projecting member 50, as shown in FIG. 13, chevron steel 53 extending in the axial direction Z is attached to the proximity surface 3 a of the steel sheet pile 3, and one side 53 a of the chevron steel 53 of the main body portion 20. It may be arranged outside the end portion 20a and the other side edge 53b of the angle steel 53 may be attached to the adjacent surface 3a by welding or the like.

  In the steel sheet pile 3, the resistance portion 5 is provided by applying anti-slip processing to the proximity surface 3a on the front side A of the retaining wall 8 or by attaching the protruding member 50. Without being limited thereto, anti-slip processing is performed on the proximity surface 3a, and the protruding member 50 is attached to the proximity surface 3a, so that the resistance portion 5 is provided by using the anti-slip processing and the projection member 50 in combination. May be.

  As shown in FIG. 14, the steel sheet pile 3 is pressed from the back surface side B by the earth pressure P acting on the back surface portion 31, and the overall depth dimension D of the steel sheet pile 3 is reduced. At this time, in the steel sheet pile 3, the pair of web portions 32 continuously inclining toward the outer side in the width direction X from both ends of the back surface portion 31 are deformed so as to be separated from each other in the width direction X. The connecting portion 35 provided at one end of 32 moves so as to expand in the width direction X, and the overall width dimension W of the steel sheet pile 3 increases.

  The joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied has the soil on the rear surface portion 31 of the steel sheet pile 3 in a state where the connecting member 35 of the steel pipe sheet pile 4 is connected to the connecting portion 35 of the steel sheet pile 3. As the pressure P acts, as shown in FIG. 15 (a), the proximity surface 3 a of the steel sheet pile 3 comes into contact with the end surface 21 a of the slit portion 21, and the main body portion from the rear surface side B toward the front surface side A. The external force F1 by the earth pressure P acts on the end portion 20a on the front side A of the main body portion 20 in a direction in which the end portion 20a on the front side A of the body 20 expands outward.

  At this time, in the conventional connecting wall structure 9, as shown in FIG. 15 (b), the proximity surface 90 a of the steel sheet pile 90 contacts the end surface 91 a of the slit portion 91 and the end portion of the main body portion 92 on the front side A. Since 92a is pressed by the external force F1 as it is, the end portion 92a on the front side A of the main body 92 may spread outward. Therefore, in the conventional connecting wall structure 9, the end portion 92a on the front side A of the main body portion 92 expands outward, the distance d between both end portions 92a of the main body portion 92 increases, and the slit portion 91 expands. When opened, the connecting portion 93 of the steel sheet pile 90 might be separated from the main body portion 92.

  On the other hand, in the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied, as shown in FIG. 16 (a), the proximity surface 3 a of the steel sheet pile 3 is subjected to anti-slip processing and resistance. By providing the portion 5, the surface roughness of the adjacent surface 3a of the steel sheet pile 3 is increased, and the frictional resistance when the end surface 21a of the slit portion 21 contacts the adjacent surface 3a is increased.

  At this time, the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied increases the frictional resistance when the end surface 21a of the slit portion 21 contacts the adjacent surface 3a, thereby connecting the steel sheet piles 3. When the portion 35 moves so as to expand in the width direction X, the frictional resistance R1 acts on the end surface 21a of the slit portion 21 to push the end portion 20a on the front side A of the main body portion 20 inward. Become.

  In addition, in the joint structure 1 that connects the steel sheet pile and the steel pipe sheet pile to which the present invention is applied, as shown in FIG. 16B, the protruding member 50 is attached to the adjacent surface 3 a of the steel sheet pile 3 and the resistance portion 5 is formed. By being provided, the projecting member 50 is locked to the outside of the end portion 20a on the front surface side A of the main body portion 20.

  At this time, the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied has the front side A of the main body portion 20 when the connecting portion 35 of the steel sheet pile 3 moves so as to expand in the width direction X. The protruding member 50 is locked to the outside of the end 20a, and the pushing force R2 acts from the outside of the end 20a of the main body 20, so that the end 20a on the front side A of the main body 20 faces inward. It will be pushed in.

  In the joint structure 1 that connects the steel sheet pile and the steel pipe sheet pile to which the present invention is applied, the earth pressure P acts on the back surface portion 31 of the steel sheet pile 3 and the connecting portion 35 expands in the width direction X. Since the predetermined resistance portion 5 is provided on the proximity surface 3a of the steel sheet pile 3 so that the end portion 20a of the main body portion 20 is pushed inward on the front surface side A, the end portion of the main body portion 20 on the front surface side A is provided. It is possible to prevent the frictional resistance force R1 or the pushing force R2 from acting on the portion 20a to increase the distance d between the two end portions 20a of the body portion 20 in the circumferential direction.

  Thereby, in the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied, the separation distance d between the both ends 20a of the main body portion 20 is prevented from increasing, and the connecting member 2 of the steel pipe sheet pile 4 is provided. Since it is possible to suppress the expanding deformation of the main body portion 20, it is possible to prevent the slit portion 21 of the connecting member 2 from expanding and prevent the joint portion 34 of the steel sheet pile 3 from being separated from the main body portion 20 of the connecting member 2. By doing so, it becomes possible to firmly maintain the connection state between the steel sheet pile 3 and the steel pipe sheet pile 4.

  Further, the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied utilizes the fact that the earth pressure P acts from the rear side B of the retaining wall 8 to deform the steel sheet pile 3, and thus the steel sheet pile. Since it is possible to maintain the connection state between the steel pipe sheet pile 4 and the steel pipe sheet pile 4, it is possible to suppress the deformation such as expansion of the connection member 2 without increasing the plate thickness t2 of the connection member 2 of the steel pipe sheet pile 4 more than necessary. As a result, the plate thickness t2 of the connecting member 2 can be reduced, and the material cost of the connecting member 2 necessary for constructing the retaining wall 8 can be reduced.

  In particular, in the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied, as shown in FIG. 17, the slit portion 21 of the connecting member 2 of the steel pipe sheet pile 4 and the proximity surface 3a of the steel sheet pile 3 face each other. The slit portion 21 of the connecting member 2 is such that the tangent line C that is in contact with the surface of the end portion 20a on the front side A of the main body portion 20 is made substantially orthogonal to the adjacent surface 3a of the steel sheet pile 3 at the attached location S. Can be formed.

  Thereby, in the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied, the frictional resistance force R1 or the pushing force R2 acts on the front side A of the main body portion 20 from right next to the end portion 20a, Since the end portion 20a on the front side A of the main body portion 20 can be efficiently pushed inward, the deformation of the main body portion 20 in the connecting member 2 of the steel pipe sheet pile 4 is surely suppressed. It becomes possible.

  In the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied, when the U-shaped steel sheet pile is used as the steel sheet pile 3, as shown in FIG. When the web sheet 32 of the steel sheet pile 3 is sandwiched between the slit portions 21 of the connecting member 2 by being inserted into the body portion 20, the steel sheet pile 3 has the proximity surface 3a on the front side A of the web portion 32. Become.

  In the joint structure 1 that connects the steel sheet pile and the steel pipe sheet pile to which the present invention is applied, even when a U-shaped steel sheet pile is used as the steel sheet pile 3, as shown in FIG. Since the earth pressure P acts to spread the connecting portion 35 in the width direction X, as shown in FIG. 18, the frictional resistance force R1 or the pushing force R2 acts on the end portion 20a on the front side A of the main body portion 20, In the connecting member 2 of the steel pipe sheet pile 4, the expanding deformation of the main body portion 20 is suppressed, and it becomes possible to firmly maintain the connection state between the steel sheet pile 3 and the steel pipe sheet pile 4.

  As shown in FIG. 19, a joint structure 1 for connecting a steel sheet pile and a steel pipe sheet pile to which the present invention is applied has a connecting member 2 such as a heat-pressing joint in which both end portions 20a of a main body portion 20 are largely separated from each other. It may be attached to the body tube 40 of No. 4 by welding or the like. The joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied has a frictional resistance to the end portion 20a on the front side A of the main body portion 20 even when the connecting member 2 such as a hot pressing joint is used. The force R1 or the pushing force R2 acts to suppress the deformation of the main body portion 20 in the connecting member 2 of the steel pipe sheet pile 4 such that the main body portion 20 expands, and the connection state between the steel sheet pile 3 and the steel pipe sheet pile 4 can be firmly maintained. It will be possible.

  In addition, as shown in FIG. 11B, the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied has a grooved steel 52 attached to the adjacent surface 3 a of the steel sheet pile 3 to form a grooved steel sheet. By arranging the other flange 52b of the steel 52 inside the end portion 20a of the main body portion 20, the flange 52b is also locked from the inside of the end portion 20a of the main body portion 20, and the main body of the connecting member 2 It is possible to reliably prevent the joint portion 34 of the steel sheet pile 3 from coming off the portion 20.

  Further, as shown in FIGS. 12A and 13A, the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied has the other flange 52b of the channel steel 52 and the angle steel 53. Since the other side 53b of the steel sheet pile 3 is not sandwiched between the slit portions 21 of the connecting member 2, it is possible to prevent the connecting portion 35 of the steel sheet pile 3 and the slit portion 21 of the connecting member 2 from competing with each other. The connecting portion 35 of the sheet pile 3 can be easily inserted into the main body portion 20.

  As shown in FIG. 20, a joint structure 1 for connecting a steel sheet pile and a steel pipe sheet pile to which the present invention is applied has a resistance portion 5 that is subjected to a predetermined anti-slip process, or a resistance portion to which a protruding member 50 is attached. 5 is provided on the adjacent surface 3a of the steel sheet pile 3 continuously or intermittently in the axial direction Z of the steel sheet pile 3.

  In particular, in the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied, the resistance portion 5 is continuously provided in the axial direction Z of the steel sheet pile 3 as shown in FIG. Since the protruding member 50 and the like can be continuously welded to the adjacent surface 3a, the protruding member 50 and the like can be efficiently attached.

  In addition, in the joint structure 1 that connects the steel sheet pile and the steel pipe sheet pile to which the present invention is applied, as shown in FIG. 20B, the resistance portion 5 is provided intermittently in the axial direction Z of the steel sheet pile 3. Thus, since the amount of use of the protruding member 50 such as a steel rod attached to the adjacent surface 3a and the amount of work for anti-slip processing can be reduced, the material cost of the protruding member 50 and the processing cost of anti-slip processing can be reduced. Is possible.

  Here, as shown in FIG. 21, the retaining wall 8 is provided as a revetment wall or the like at the boundary between the front ground 81 and the back ground 82, and the earth pressure P acts on the steel sheet pile 3 from the back ground 82. The retaining wall 8 has a main earth pressure from the back surface side B acting on the steel sheet pile 3 depending on a wall surface friction angle δ at the wall back surface 8a where the back ground 82 and the back surface portion 31 of the steel sheet pile 3 contact each other. It shows a predetermined distribution in the high direction.

  The retaining wall 8 acts on the steel sheet pile 3 when the height difference between the high ground surface 82a on the rear side B of the retaining wall 8 and the low ground surface 81a on the front side A of the retaining wall 8 is defined as the retaining wall height H. The active earth pressure from the rear side B is 1/2 of the retaining wall height H than the range h1 from the high ground surface 82a on the rear side B of the retaining wall 8 to the position m of 1/2 of the retaining wall height H. It is understood that the active earth pressure intensively acts on the steel sheet pile 3 in the range h2 from the position m to the low ground surface 81a on the front side A of the retaining wall 8.

  Therefore, the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied has an axial direction Z of the steel sheet pile 3 from the high ground surface 82a on the rear surface side B of the retaining wall 8 to the retaining wall height H of 1. Only in the range h3 below the range h1 up to / 2, and particularly in the range h2 up to the low ground surface 81a on the front side A of the retaining wall 8, the resistance portion 5 such as the protruding member 50 is attached to the steel sheet pile 3. It can be provided in.

  Thus, the joint structure 1 for connecting the steel sheet pile and the steel pipe sheet pile to which the present invention is applied has the resistance portion 5 such as the projecting member 50 in the range h2 in which the active earth pressure concentrates on the steel sheet pile 3. By providing the steel sheet pile 3 and the steel pipe sheet pile 4, the connection state between the steel sheet pile 3 and the steel pipe sheet pile 4 can be firmly maintained, and the amount of use of the protruding member 50 such as a steel rod and the amount of non-slip processing can be increased. Since it can be reduced, it is possible to reduce the material cost of the protruding member 50 and the processing cost of the slip prevention processing.

  Although the examples of the embodiments of the present invention have been described in detail above, the above-described embodiments are merely examples of specific embodiments for carrying out the present invention, and the technical aspects of the present invention are thereby described. The range is not to be construed as limiting.

1: Joint structure for connecting a steel sheet pile and a steel pipe sheet pile 2: Connection member 20: Body portion 20a: Body portion end 21: Slit portion 21a: Slit portion end surface 3: Steel sheet pile 3a: Proximity surface 30: Flange portion 31: Back part 32: Web part 33: Arm part 34: Joint part 35: Connection part 4: Steel pipe sheet pile 40: Main body pipe 40a: Main body pipe outer surface 5: Resistance part 5a: Weld bead 5b: Working plate 50: Projecting member 51: Round steel bar 52: Channel steel 53: Angle steel 8: Retaining wall 8a: Wall back 81: Front ground 81a: Front ground ground surface 82: Back ground 82a: Back ground ground surface A: Front side B: Back side W: Width dimension X: Width direction Y: Depth direction Z: Axial direction

Claims (6)

A retaining wall including a steel sheet pile, a steel pipe sheet pile, and a joint structure connecting the steel sheet pile and the steel pipe sheet pile,
A connecting member extending in the axial direction of the main body pipe of the steel pipe sheet pile; and a hat-shaped or Z-shaped steel sheet pile connected to the connecting member,
The connecting member has a main body portion attached to the outer surface of the main body pipe of the steel pipe sheet pile, and a slit portion continuously formed in the axial direction of the main body portion,
The steel sheet pile is disposed on the rear side, a rear portion of the soil pressure from the rear side is applied, the web portion provided extending across or RaTadashi surface side of the rear portion, the one end of the web portion provided a connecting portion to be inserted into the body, that the coupling portion earth pressure on the rear portion acts spreads in the width direction of the steel sheet pile, the positive side of the main body portion as becomes to push the end portion toward the inside of the main body portion of the connecting portion is inserted, the proximity face on the positive side was sandwiched between the slit portion, the slip process is performed, and The resistance portion is provided by at least one of attaching the protruding member ,
The resistor unit retaining wall according to claim Rukoto provided only in the proximity face on the front side. The retaining wall according to claim 1, wherein the resistance portion is provided by subjecting only the non- slip surface to the near surface. The resistor unit according to claim 1 Symbol placement of retaining wall only the projecting member to be engaged on the outside of the body portion and which are located by being attached to the adjacent surface. The retaining wall according to any one of claims 1 to 3, wherein the resistance portion is provided on the adjacent surface intermittently in the axial direction of the steel sheet pile. Said resistor section, when the difference in height between the high ground surface and the lower front side ground surface of the back surface side of the retaining wall height, in the axial direction of the steel sheet pile, retaining wall height from the ground surface of the rear side The retaining wall according to any one of claims 1 to 4, wherein the retaining wall is provided on the adjacent surface only in a range lower than a range up to 1/2. In the connecting member, the slit portion is formed so that a tangent line of the main body portion at a mounting location where the slit portion and the proximity surface are opposed to each other is substantially orthogonal to the proximity surface. The retaining wall according to any one of claims 1 to 5, which is characterized.

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