JP2017186794A - Vertical connection construction method and restraining member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical connection construction method capable of mutually easily and quickly connecting a plurality of steel members in the material axial direction, while restraining the movement in the wall width direction of the steel members.SOLUTION: A vertical connection construction method of applying the present invention comprises a vertical connection process of connecting a plurality of steel members of a predetermined cross-sectional shape in the material axial direction Y and connecting an end part in the axial direction Y of mutually opposed respective materials by a plurality of steel sheet piles 3 and 4. In the vertical connection process, a succeeding steel sheet pile 4 of becoming a succeeding steel member is moved in the wall width direction Z to a preceding steel sheet pile 3 of becoming a preceding steel member, and while positioning a succeeding side end part 40 of becoming an end part of the succeeding steel sheet pile 4 and a preceding side end part 30 of becoming an end part of the preceding steel sheet pile 3 in the wall width direction Z, the succeeding side end part 40 and the preceding side end part 30 are connected in the material axial direction Y, and the movement in the wall width direction Z of the succeeding steel sheet pile 4 is restrained by a restraining member 1.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a cascade construction method for connecting a plurality of steel members having a predetermined cross-sectional shape in the material axis direction, and a restraining member for connecting a plurality of steel sheet piles in the material axis direction.

  Conventionally, for example, a steel sheet pile joint structure disclosed in Patent Document 1 has been proposed as an inexpensive and simple construction that can reduce construction time and cost while ensuring water-stopping, rigidity, and proof strength of the longitudinal joint. Has been. Further, for example, a joint structure disclosed in Patent Document 2 has been proposed as a material capable of exhibiting a high bending strength when the end portions of H-shaped steels are butt-joined.

  The steel sheet pile joint structure disclosed in Patent Document 1 protrudes from the web and flange at the upper end of the lower steel sheet pile, with the upper edge of the lower steel sheet pile and the lower edge of the upper steel sheet pile in contact with each other. The lower joint member and the upper joint member protruding from the web and the flange at the lower end of the upper steel sheet pile are bolted by a plurality of bolts.

  In the joint structure disclosed in Patent Document 2, columnar members having L-shaped cross sections that contact both sides of the H-shaped steel web and the flange are disposed on the front and back surfaces of the web across the ends of both H-shaped steels. The columnar member, the H-shaped steel web, and the shear reinforcing plate are bolted by a plurality of bolts in a state where the columnar member and the shear reinforcing plate overlap each other.

JP 2011-38288 A JP 2007-291682 A

  Here, when a plurality of steel sheet piles are cascade-welded by on-site welding, the steel sheet piles that have recently become larger in cross-section have a large cross-sectional area of the steel sheet piles and a large amount of welding. Is longer and the construction period is longer when there are many connecting points. In addition, when a plurality of steel sheet piles are cascaded by high-strength bolt friction joining, it is necessary to join a large number of high-strength bolts in order to ensure sufficient strength. The construction period is prolonged when there are many cascaded parts.

  For this reason, in order to shorten the welding time and joining time per one location of the longitudinal joint, a steel sheet pile joint structure disclosed in Patent Document 1 has been proposed, and a plurality of H-section steels are cascaded. As a thing, the junction structure indicated by patent documents 2 is proposed. However, the restraint means for restraining the movement in the wall width direction when connecting the steel sheet pile joint structure disclosed in Patent Document 1 and the joint structure disclosed in Patent Document 2 in the longitudinal direction. There is no disclosure.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to provide a plurality of steel members while restraining the movement of the steel members in the wall width direction. An object of the present invention is to provide a cascade construction method and a restraining member that can be easily and quickly connected to each other in the axial direction.

  The longitudinal construction method according to the first invention is a longitudinal construction method for connecting a plurality of steel members having a predetermined cross-sectional shape in the material axial direction, and each material axial direction facing each other by the plurality of steel members. A connecting step for connecting the ends of the steel member, and in the connecting step, a succeeding steel member that is a succeeding steel member with respect to a preceding steel member that is a preceding steel member is arranged in the wall width direction. While moving, the trailing side end that is the end of the trailing steel member and the leading side end that is the end of the leading steel member are aligned in the wall width direction, the trailing side The end portion and the preceding side end portion are connected in the material axis direction, and the movement of the succeeding steel member in the wall width direction is restrained by a restraining member.

  The cascade construction method according to the second invention is the first invention, wherein steel sheet piles are used for the preceding steel member and the succeeding steel member, and in the cascade step, the preceding steel member becomes the preceding steel member. After fitting a joint-like member serving as the restraining member to the joint portion of the steel sheet pile, fitting the joint portion of the subsequent steel sheet pile serving as the following steel member to the joint-like member, the following The movement of the steel member in the wall width direction is restricted by the joint-like member.

  In the first or second invention, the cascade construction method according to the third aspect of the invention is such that, in the cascade process, the trailing side end and the leading side end are aligned in the wall width direction, Formed on a base member-side protrusion formed on one or both of the leading side end and the trailing side end, and a connecting member constructed from the trailing side end to the leading side end. In a state where the connecting side protrusion is locked, the trailing side end and the leading side end are connected in the material axis direction.

  The cascade construction method according to a fourth aspect of the invention is the third aspect of the present invention, in the third aspect of the invention, in the longitudinal connection step, the frame member that is surrounded in a state where the connection side projection and the base material side projection are locked together, and Any one or both of the plate members erected from the connecting member to the base material side protrusion are provided as the restraining member on the connecting member.

  In the third or fourth invention, the longitudinal construction method according to the fifth aspect of the invention is the axial member that is continuously penetrated from the connecting member to the base material side protrusion in the longitudinal connection step, and the connection One or both of the eaves members fitted in the notch grooves formed in the side protrusions and the base material side protrusions are provided in the connecting member as the restraining member.

  The restraint member concerning the 6th invention is a restraint member for connecting a plurality of steel sheet piles in the direction of the material axis, and it becomes the joint part of the preceding steel sheet pile as the preceding steel sheet pile and the subsequent steel sheet pile. A joint-like member fitted to a joint portion of the steel sheet pile is provided, and the joint-like member is a trailing side end portion serving as an end portion of the trailing steel sheet pile and a leading side end serving as an end portion of the preceding steel sheet pile. It is characterized by being provided continuously from the joint part of the preceding steel sheet pile to the joint part of the subsequent steel sheet pile in a state where the parts face each other in the material axis direction.

  According to 1st invention-6th invention, since the movement of the wall width direction of a subsequent steel sheet pile can be restrained with a restraint member, the joint part of a subsequent steel sheet pile is connected to the joint part of an adjacent connection steel member. A plurality of steel members can be easily and quickly connected to each other in the material axis direction by smoothly fitting.

  In particular, according to the second invention, the fourth invention to the sixth invention, after fitting the joint portion of the subsequent steel sheet pile to the joint portion of the adjacent connected steel member, the restraint of the joint-like member or the frame member or the like. Since the member can be removed and reused, it is possible to suppress an increase in material cost of a joint-like member provided as a restraining member.

  In particular, according to the third invention, by connecting a plurality of steel members with a connecting member, it is assumed that a sufficient bending rigidity is ensured at a location where the plurality of steel members are connected and does not become a structural weakness. It is possible to avoid a decrease in the bending performance of the entire connected steel member in which a plurality of steel members are connected in the material axis direction.

It is a perspective view which shows the steel wall constructed | assembled with the cascade construction method to which this invention is applied. It is a front view which shows the edge part of the some steel sheet pile connected with the cascade construction method to which this invention is applied. It is a top view which shows the hat-shaped steel sheet pile connected with the cascade construction method to which this invention is applied. It is a top view which shows the U-shaped steel sheet pile connected with the cascade construction method to which this invention is applied. It is a top view which shows the Z-shaped steel sheet pile connected with the cascade construction method to which this invention is applied. It is a side view which shows the connection side projection part and base material side projection part which R part is formed and locked mutually by the cascade construction method to which this invention is applied. It is a side view which shows the modification of the connection side projection part and base material side projection part which R part is formed and locked mutually by the cascade construction method to which this invention is applied. It is a side view which shows the connection side protrusion part and base material side protrusion part in which R part is not formed with the cascade construction method to which this invention is applied. (A) is a perspective view which shows the process which drives a preceding steel sheet pile in the ground in the cascade process of the cascade construction method to which this invention is applied, (b) is a joint to the joint part of a preceding steel sheet pile. It is a perspective view which shows the process in which a cylindrical member is fitted. (A) is a perspective view which shows the process of moving a follower steel sheet pile to a wall width direction at the cascade process of the cascade construction method to which this invention is applied, (b) is a succeeding side edge part and preceding. It is a perspective view which shows the process in which a side edge part is aligned to a wall width direction. (A) is a perspective view which shows the joint-like member continuously fitted by the joint part from the preceding steel sheet pile to the succeeding steel sheet pile in the cascade process of the cascade construction method to which this invention is applied, (b ) Is a perspective view showing a state in which the movement of the trailing steel sheet pile in the wall width direction is restrained by a joint-like member. (A) is a perspective view which shows the process in which the subsequent steel sheet pile is further cast in the ground with the preceding steel sheet pile in the casting process of the cascade construction method to which the present invention is applied, and (b) is the subsequent process. It is a perspective view which shows the process in which a joint-shaped member is pulled out and removed by the upper end side of a steel sheet pile. It is a top view which shows the joint-shaped member used as the restraint member to which this invention is applied. It is a perspective view which shows the state by which a connection side protrusion part is latched by the base material side protrusion part provided in the subsequent steel sheet pile and the preceding steel sheet pile by the cascade construction method to which this invention is applied. (A) is a perspective view which shows the connection member which slide-moves by the cascade construction method to which this invention is applied, (b) is a perspective view which shows the frame member attached to a connection member, (c) is It is a perspective view which shows the state pinched | interposed by the horizontal frame part of the frame member. (A) is a perspective view which shows the connection member which slide-moves by the cascade construction method to which this invention is applied, (b) is a perspective view which shows the board member attached to a connection member, (c) is It is a perspective view which shows the state by which the plate member was constructed. (A) is a perspective view which shows the connection member slid by the cascade construction method to which this invention is applied, (b) is a perspective view which shows the shaft member attached to a connection member, (c). It is a perspective view which shows the state which penetrated the shaft member. (A) is a perspective view which shows the connection member which slide-moves with the cascade construction method to which this invention is applied, (b) is a perspective view which shows the collar member attached to a connection member, (c) is It is a perspective view which shows the eaves member fitted by the notch groove. It is a top view which shows the H-section steel, square steel pipe, and round steel pipe which are used as a steel member by the cascade structure of the steel member to which this invention is applied.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out a cascade construction method and a restraining member 1 to which the present invention is applied will be described in detail with reference to the drawings.

  As shown in FIG. 1, the longitudinal construction method to which the present invention is applied is a short steel sheet pile embedded below and above the ground 8 in a site such as a narrow area where the long steel sheet pile 2 cannot be constructed. 2 are used as a plurality of steel members to be connected to each other in the material axial direction Y.

  In the cascade construction method to which the present invention is applied, a plurality of steel members are connected in the material axis direction Y, whereby a long connected steel member 70 is formed. In the cascade construction method to which the present invention is applied, a plurality of steel members connected in the material axis direction Y are used as one long connected steel member 70, and the plurality of connected steel members 70 are arranged in the wall width direction Z. Thus, the steel wall 7 is constructed in the ground 8 or the like.

  In the cascade construction method to which the present invention is applied, among the plurality of short steel sheet piles 2 and the like embedded in the ground 8, for example, a preceding steel member embedded prior to the ground 8 is defined as a preceding steel member. At the same time, the subsequent steel member embedded in the ground 8 is used as the subsequent steel member.

  In the cascade construction method to which the present invention is applied, as shown in FIG. 2, the end portion in the material axial direction Y arranged on the upper end side of the preceding steel member becomes the leading end portion 30, and is made of subsequent steel. The end in the material axis direction Y arranged on the lower end side of the member becomes the trailing side end 40.

  In the cascade construction method to which the present invention is applied, the end portions in the material axis direction Y of the plurality of steel members are set to the leading end portion 30 of the leading steel member and the trailing end portion of the trailing steel member. As 40, they are connected to face each other in the material axis direction Y.

  In the cascade construction method to which the present invention is applied, when the steel sheet pile 2 is used as the preceding steel member and the subsequent steel member, the steel sheet pile 2 such as the hat-shaped steel sheet pile 21 is mainly used. The steel member becomes the preceding steel sheet pile 3 and the succeeding steel member becomes the succeeding steel sheet pile 4.

  In the cascade construction method to which the present invention is applied, for example, the connecting member 5 made of steel or the like is constructed from the trailing side end 40 to the leading side end 30. At this time, in the cascade construction method to which the present invention is applied, a plurality of connecting members 5 are continuously installed in the material axis direction Y across the trailing side end 40 and the leading side end 30, thereby Each end of the steel sheet pile 2 is connected in the material axis direction Y.

  As shown in FIG. 3, when the hat-shaped steel sheet pile 21 is used, the steel sheet pile 2 is formed with a flange portion 2a, a pair of web portions 2b, a pair of arm portions 2c, and a pair of joint portions 2d. The groove portion S is formed by being surrounded by the flange portion 2a and the pair of web portions 2b.

  The steel sheet pile 2 extends in the wall width direction Z to form a flange portion 2a, and the web portion 2b is inclined from each end of the flange portion 2a in the wall width direction Z. As for the steel sheet pile 2, each arm part 2c is formed from one end of each web part 2b, and each joint part 2d is formed in the front-end | tip of each arm part 2c.

  The steel sheet pile 2 has a flat surface 20 formed in a substantially flat shape by forming the side surfaces of the flange portion 2a, the web portion 2b and the arm portion 2c in a substantially flat shape. The steel sheet pile 2 is continuously provided in the wall width direction Z by connecting a plurality of steel sheet piles 2 arranged in the wall width direction Z by fitting the respective joint portions 2d to each other.

  As for the steel sheet pile 2, the connection member 5 is constructed by the flat surface 20 of the flange part 2a. Further, the steel sheet pile 2 may have the connecting member 5 installed on the flat surface 20 of either one or both of the web portion 2b and the arm portion 2c. As the steel sheet pile 2, not only the hat-shaped steel sheet pile 21 but also a U-shaped steel sheet pile 22 or a Z-shaped steel sheet pile 23 may be used as shown in FIGS. 4 and 5, for example.

  When the U-shaped steel sheet pile 22 is used, the steel sheet pile 2 is formed with a flange portion 2a, a pair of web portions 2b, and a pair of joint portions 2d, and the flange portion 2a and the web, as shown in FIG. The side surface of the portion 2b becomes the flat surface 20. Moreover, as shown in FIG. 5, when the Z-shaped steel sheet pile 23 is used, the steel sheet pile 2 is formed with a web portion 2b, a pair of arm portions 2c, and a pair of joint portions 2d, and the web portion 2b. And the side surface of the arm part 2 c becomes the flat surface 20.

  As shown in FIG. 6, the connection member 5 is formed with a connection-side protrusion 50 that protrudes from the flat plate portion 51 in the material axis orthogonal direction X on the flat plate portion 51 using a steel plate or the like. In the connection member 5, the connection side protrusion 50 continuously extending in the wall width direction Z is formed integrally with the flat plate portion 51 by hot rolling or cold rolling.

  The connecting member 5 is not limited to this, and the flat plate portion 51 and the connecting-side protruding portion 50 may be integrally formed by machining by using a thick steel plate as a cutting process or the like. Moreover, the flat member etc. are used for the connection member 5 as the connection side protrusion part 50, and the flat plate part 51 and the connection side protrusion part 50 are integrated by welding the flat steel etc. to the side surface of the flat plate part 51. May be formed.

  In the connecting member 5, a flat plate portion 51 is formed continuously in the material axis direction Y from the trailing side end 40 to the leading side end 30, and the trailing side end 40 and the leading side end 30 are formed from the flat plate portion 51. One or a plurality of connection-side protrusions 50 are formed by projecting toward one or both of the above.

  The connecting side protrusion 50 is formed on either or both of the upper and lower portions of the flat plate portion 51 in the material axis direction Y, and is formed on either or both of the trailing side end 40 and the leading side end 30. The base material side protrusions 55 are engaged with each other in the material axis direction Y.

  For example, when the base-side protrusion 55 is provided only in one of the trailing-side end 40 and the leading-side end 30, the connecting-side protruding part 50 includes the trailing-side end 40 and the leading-side end. Any one of 30 is locked to the base material side protrusion 55 in the material axis direction Y.

  The flat plate portion 51 is formed in a substantially rectangular shape or the like, and is erected along each flat surface 20 of the plurality of steel sheet piles 2. The flat plate portion 51 is either the trailing side end portion 40 or the leading side end portion 30 when the base material side projection 55 is provided only in either the trailing side end portion 40 or the leading side end portion 30. On the other hand, the portion where the connecting protrusion 50 is not formed is brought into contact with and directly attached by welding or the like.

  The base material side projection 55 is formed by attaching a base material steel plate 54 or the like to one or both of the trailing side end 40 and the leading side end 30 by welding or the like. It is formed so as to protrude in the material axis orthogonal direction X toward the portion 51. The base material side protrusion 55 is formed such that the base material side protrusion 55 continuously extending in the wall width direction Z is integrally formed with the base material steel plate 54 by hot rolling or cold rolling. Become.

  The base material steel plate 54 is not limited to this, and the base material steel plate 54 and the base material side protrusion 55 may be integrally formed by machining by using a thick steel plate as a cutting process or the like. Further, the base steel plate 54 is made of flat steel or the like as the base metal side protrusion 55, and the base steel plate 54 and the base metal side protrusion are joined by welding and joining the flat steel or the like to the side surface of the base steel plate 54. 55 may be integrally formed.

  The base material side protrusion 55 is provided by attaching the base material steel plate 54 to one or both of the trailing side end 40 and the leading side end 30. The base material side protrusion 55 is not limited to this, and as shown in FIG. 7A and FIG. 7B, either the back side end 40 or the leading side end 30 has a base material side. A flat steel or the like that becomes the protrusion 55 may be attached by direct welding or the like.

  As shown in FIGS. 6 and 7A, the base material side protrusion 55 is provided only on one of the trailing side end 40 and the leading side end 30. The base-material-side protrusion 55 is not limited to this, and is provided at the trailing-side end 40 and the leading-side end 30 as shown in FIGS. The connection-side protrusion 50 may be locked in the material axis direction Y at both the portion 40 and the leading end 30.

  The connection protrusion 50 and the base protrusion 55 are formed by an easy extrusion process as shown in FIGS. 6 and 7, particularly when formed by hot rolling or cold rolling. In order to improve the properties, it is desirable that an R portion is formed at each corner.

  The connection side protrusion 50 and the base material side protrusion 55 are formed to be inclined in a taper shape in the material axis orthogonal direction X, for example, each facing in the material axis direction Y as shown in FIG. It is desirable that the one side surfaces of these are formed substantially parallel to each other. Moreover, the connection side protrusion part 50 and the base material side protrusion part 55 may be formed in cross-sectional substantially trapezoid shape, as shown in FIG.6 (b) and FIG.6 (c).

  Further, as shown in FIG. 8A, the connection-side protrusion 50 and the base-material-side protrusion 55 may be formed in a substantially trapezoidal cross section without forming an R portion at each corner. Further, as shown in FIG. 8B, the cross section may be formed in a substantially T shape. And the connection side protrusion part 50 and the base material side protrusion part 55 may be formed in cross-sectional substantially rectangular shape, as shown in FIG.8 (c).

  The connection-side protruding portion 50 and the base material-side protruding portion 55 are each of which resists the tensile force acting on the plurality of steel sheet piles 2 by being brought into contact with each other and being locked in the material axial direction Y. Thus, the plurality of steel sheet piles 2 are restrained so as not to be separated from each other in the material axis direction Y.

  As shown in FIGS. 6, 7, and 8 (a), the connection-side protrusion 50 and the base-material-side protrusion 55 are in contact with each other on one side inclined in a tapered shape, or in FIG. ), The cross sections are formed in a substantially T shape and are locked to each other in the material axis orthogonal direction X. At this time, the connection side protrusion 50 and the base material side protrusion 55 restrain the connection member 5 so as not to be separated in the material axis orthogonal direction X.

  As shown in FIG. 8C, the connection-side protrusion 50 and the base-material-side protrusion 55 are less likely to be locked together in the material axis orthogonal direction X when formed in a substantially rectangular cross section. At this time, in particular, the connecting member 5 penetrates the shaft member 62 such as a bolt in the material axis orthogonal direction X and is screwed to a fastening nut, a weld nut or a female screw processed portion, thereby Be bound.

  The cascade construction method to which the present invention is applied, as shown in FIG. 9 to FIG. 12, includes a cascade process in which ends of each material axial direction Y facing each other with a plurality of steel members are connected. Accordingly, it further includes a placing step of placing a plurality of steel members connected to each other in the ground 8.

  In the cascade construction method to which the present invention is applied, a connection steel member 70 is formed by connecting a plurality of steel members in the material axis direction Y in a cascade process, and the connection steel member 70 is placed in the casting process. To place 8 in the ground. In the cascade construction method to which the present invention is applied, the steel wall 7 is constructed in the ground 8 by sequentially placing and connecting a plurality of connecting steel members 70 in the wall width direction Z. It becomes.

  In the first embodiment, the cascade construction method to which the present invention is applied is a joint-like member fitted in the joint portion 2d of the preceding steel sheet pile 3 and the joint portion 2d of the subsequent steel sheet pile 4 as shown in FIG. 6 is used as the restraining member 1 for connecting the plurality of steel sheet piles 2 in the material axis direction Y.

  In the cascade connection process, first, as shown in FIG. 9A, the preceding steel sheet pile 3 to be the preceding steel member is grounded in the state where the connecting steel member 70 adjacent to the wall width direction Z is driven. Place in 8 of them. At this time, the preceding steel sheet pile 3 is driven into the ground 8 with a vibro hammer or the like in a state where the joint portion 2d of the preceding steel sheet pile 3 is fitted to the joint portion 2d of the adjacent connecting steel member 70.

  Next, in the cascade connection step, as shown in FIG. 9 (b), the preceding steel is the portion where the leading end 30 of the preceding steel sheet pile 3 protrudes upward from the upper end 70 a of the connecting steel member 70. The joint-like member 6 is fitted into the joint portion 2d of the sheet pile 3. At this time, as shown in FIG. 13, in the joint-like member 6, a claw part 6 a having substantially the same shape as the joint part 2 d of the steel sheet pile 2 is fitted into the joint part 2 d of the steel sheet pile 2.

  Here, the joint-like member 6 is, for example, extended from the claw portion 6a in the wall width direction Z to form the extended portion 6b, and the claw portion 6a and the extended portion 6b are formed continuously in the material axis direction Y. The The joint-like member 6 is located at a position spaced apart from the claw portion 6a in the material axis orthogonal direction X by connecting the extending plate 6d to the substantially flat sandwiching plate 6c and the extending portion 6b as necessary. The sandwiching plate 6c is disposed on the surface.

  In the joint-like member 6, the joint portion 2d of the steel sheet pile 2 is disposed between the sandwiching plate 6c and the claw portion 6a by fitting the claw portion 6a to the joint portion 2d of the steel sheet pile 2. The joint-like member 6 is a steel sheet pile between the tip of the shaft member 62 and the claw portion 6a by tightening a shaft member 62 such as a bolt extending from the clamping plate 6c to the joint portion 2d of the steel sheet pile 2 as necessary. Two joint portions 2d are clamped and fixed.

  Next, in the cascade step, as shown in FIG. 10 (a), the succeeding steel sheet pile that becomes the succeeding steel member in a state in which the joint-like member 6 is fitted to the joint portion 2d of the preceding steel sheet pile 3. 4 is moved in the wall width direction Z. At this time, in the trailing steel sheet pile 4, the connecting member 5 is attached to the trailing side end 40, and the connecting member 5 is moved in the wall width direction Z toward the base material side protrusion 55 of the leading side end 30. To be

  Next, in the cascading step, the connecting member 5 moves in the wall width direction Z, so that the connecting side protrusions 50 are slid between the plurality of base material side protrusions 55, as shown in FIG. As shown, the trailing end 40 and the leading end 30 are aligned in the wall width direction Z. At this time, as shown in FIGS. 6 to 8, the connecting member 5 is formed such that the connecting side protruding portion 50 and the base material side protruding portion 55 are inclined in a taper shape, etc. The base material side protrusions 55 are locked together in the material axis orthogonal direction X, and the connecting member 5 is restrained in the material axis orthogonal direction X.

  Next, in the cascade connection step, as shown in FIG. 11A, the joint portion of the preceding steel sheet pile 3 with the trailing side end portion 40 and the leading side end portion 30 facing each other in the material axis direction Y. The joint-like member 6 is slid upward while being fitted to 2d. At this time, the joint-like member 6 is provided in a state of being continuously fitted from the joint portion 2d of the preceding steel sheet pile 3 to the joint portion 2d of the subsequent steel sheet pile 4, and is shown in FIG. 13 as necessary. The shaft member 62 is fixed so as not to move in the material axis direction Y.

  In the cascade process, as shown in FIG. 10B, the trailing side end 40 and the leading side end 30 are aligned with the trailing side end 40 and the leading side end 30 in the wall width direction Z. 30 are connected in the material axis direction Y by the connecting member 5. At this time, the trailing steel sheet pile 4 is connected to the trailing side end 40 and the leading side end 30, and as shown in FIG. The movement in the wall width direction Z is constrained by being continuously fitted to the joint portion 2d up to the row steel sheet pile 4.

  In the cascade process, as shown in FIGS. 6 to 8, the connecting side protrusion 50 is locked to the base material side protrusion 55 in the material axis direction Y, and the trailing side end 40 and the leading side end are connected. The part 30 is connected to the material axis direction Y. In the cascade connection step, finally, as shown in FIG. 11 (b), a plurality of steel members are connected in a state where the movement of the trailing steel sheet pile 4 in the wall width direction Z is constrained by the joint-like member 6. The process proceeds to the placing process of the connecting steel member 70.

  In the placing process, first, the succeeding steel sheet pile 4 and the subsequent steel sheet pile 4 are placed in the ground 8 with a vibro hammer or the like. At this time, the joint-like member 6 is a connected steel member 70 adjacent in the wall width direction Z in a state where the joint-like member 6 is continuously fitted from the joint portion 2d of the subsequent steel sheet pile 4 to the joint portion 2d of the preceding steel sheet pile 3. The subsequent steel sheet pile 4 is driven into the ground 8 until it comes into contact with the upper end portion 70a. And the joint-shaped member 6 will be continuously arrange | positioned to the joint part 2d of the adjacent connection steel member 70. FIG.

  In the placing step, next, the shaft member 62 shown in FIG. 13 is loosened and, as shown in FIG. 12A, the succeeding steel sheet pile 4 and the subsequent steel sheet pile 4 are further placed in the ground 8 with a vibro hammer or the like. To do. At this time, the joint portion 2d of the trailing steel sheet pile 4 was continuously slid downward from the joint-like member 6 to the joint portion 2d of the connecting steel member 70 adjacent thereto, and fitted to the joint-like member 6. It moves from the state to the state fitted to the joint part 2d of the adjacent connected steel member 70.

  In the placing process, finally, as shown in FIG. 12 (b), the succeeding steel sheet pile 4 is further placed in the ground 8, and the joint-like member 6 is pulled out on the upper end side of the succeeding steel sheet pile 4. Removal of the plurality of connected steel members 70 adjacent to each other in the wall width direction Z is completed. At this time, the plurality of connecting steel members 70 are repeatedly arranged adjacent to each other in the wall width direction Z by repeating the longitudinal connection process and the placing process, so that the steel wall 7 shown in FIG. 1 is constructed. Will be.

  The joint construction method to which the present invention is applied uses the joint-like member 6 as the restraining member 1 in the first embodiment. At this time, as shown in FIGS. 11 and 12, the cascade construction method to which the present invention is applied until the joint portion 2 d of the subsequent steel sheet pile 4 is fitted to the joint portion 2 d of the adjacent connecting steel member 70. In the meantime, the movement of the trailing steel sheet pile 4 in the wall width direction Z can be temporarily restrained by the joint-like member 6.

  The cascade construction method to which the present invention is applied mainly includes a base metal side projection 55 provided on only one of the subsequent steel sheet pile 4 and the preceding steel sheet pile 3 as shown in FIG. It is used when the connecting member 5 is directly attached to either one of the following steel sheet pile 4 and the preceding steel sheet pile 3.

  At this time, in the cascade construction method to which the present invention is applied, the connecting member 5 is moved in the wall width direction Z together with the subsequent steel sheet pile 4, so that the connecting protrusion 50 is between the plurality of base metal protrusions 55. Is inserted, and the trailing side end 40 and the leading side end 30 are aligned with each other, and the trailing side end 40 and the leading side end 30 are connected in the material axis direction Y by the connecting member 5. It will be necessary.

  For this reason, the cascade construction method to which the present invention is applied is shown in FIG. 11 (a) before fitting the joint portion 2d of the subsequent steel sheet pile 4 to the joint portion 2d of the adjacent connecting steel member 70. At this stage, the movement of the trailing steel sheet pile 4 in the wall width direction Z is restricted by the joint-like member 6, so that the joint portion 2 d of the subsequent steel sheet pile 4 is attached to the joint portion 2 d of the adjacent connected steel member 70. Until it is fitted, it is possible to maintain a state in which the trailing end 40 and the leading end 30 are aligned.

  As a result, the cascade construction method to which the present invention is applied has the wall width of the succeeding steel sheet pile 4 despite the fact that the position of the succeeding steel sheet pile 4 is likely to shift due to impact or vibration at the time of placing by vibro hammer or the like. By constraining the movement in the direction Z by the joint-like member 6, the state where the trailing side end 40 and the leading side end 30 are aligned is maintained. It is possible to smoothly fit the joint portion 2d of the trailing steel sheet pile 4 up to 2d.

  Moreover, the cascade construction method to which the present invention is applied can also be used when the base metal side projection 55 is provided on both the subsequent steel sheet pile 4 and the preceding steel sheet pile 3 as shown in FIG. . At this time, in the cascade construction method to which the present invention is applied, depending on the situation at the construction site, the joint portion 2d of the subsequent steel sheet pile 4 is connected to the joint portion 2d of the adjacent connected steel member 70 as shown in FIG. Before the fitting, the trailing side end 40 and the leading side end 30 are aligned with the connecting member 5 shown in FIG. 14 while aligning the trailing side end 40 and the leading side end 30. It is necessary to make it.

  Even in such a case, the cascade construction method to which the present invention is applied is that the joint member 6 serving as the restraining member 1 temporarily restrains the movement of the succeeding steel sheet pile 4 in the wall width direction Z. The state in which the side end portion 40 and the leading end portion 30 are aligned is maintained, and the joint portion 2d of the subsequent steel sheet pile 4 is smoothly fitted to the joint portion 2d of the adjacent connecting steel member 70. Is possible. The cascade construction method to which the present invention is applied is a case where the subsequent steel sheet pile 4 and the preceding steel sheet pile 3 are connected by a method such as on-site welding, high-strength bolt friction joining, or a joint structure of Patent Document 1. However, by restraining the movement of the trailing steel sheet pile 4 in the wall width direction Z by the joint-like member 6 that becomes the restraining member 1, damage to the welded part due to vibration of a vibratory hammer or the like, loosening of high-strength bolts, etc. Can be reduced.

  In the cascade construction method to which the present invention is applied, in the second embodiment, the frame member 60 shown in FIG. 15, the plate member 61 shown in FIG. 16, the shaft member 62 shown in FIG. 17, or the flange member 63 shown in FIG. Any one part or all of these are provided in the connection member 5 as the restraint member 1. The restraining member 1 such as the frame member 60 can be used when the base material side protrusion 55 is provided on one or both of the trailing side end 40 and the leading side end 30.

  At this time, in the cascade process, the connecting side protrusion 50 is slid and inserted between the plurality of base material side protrusions 55 so that the trailing side end 40 and the leading side end 30 are aligned. The row end 40 and the leading end 30 are connected by the connecting member 5, and the frame member 60 and the like are provided as the restraining member 1 on the connecting member 5.

  In the longitudinal joining process, as shown in FIG. 15, when the frame member 60 is provided as the restraining member 1, the base material side protrusion 55 and the connection side protrusion 50 are locked together, The frame member 60 is attached to the connecting member 5 so as to surround the protruding portion 55 and the connecting-side protruding portion 50. In the longitudinal connection process, the connection-side protrusion 50 and the base material-side protrusion 55 are sandwiched between the horizontal frame portions 60 a of the frame member 60, so that the movement of the subsequent steel sheet pile 4 in the wall width direction Z is performed by the frame member 60. Be bound.

  The frame member 60 may be used when the base material side projection 55 is provided at the leading end 30, but particularly when the base material projection 55 is provided at the trailing side end 40. It is desirable to use it. At this time, the frame member 60 is fitted into the locking groove 52 formed in the upper end surface 5b of the connecting member 5 as necessary, so that the frame member 60 is fitted into the material shaft. Restrained in the orthogonal direction X, the frame member 60 can be prevented from falling off.

  In the longitudinal joining process, as shown in FIG. 16, when the plate member 61 is provided as the restraining member 1, the plate member 61 is in a state where the base material side protrusion 55 and the connection side protrusion 50 are locked to each other. Is constructed from the connecting member 5 to the base material side protrusion 55, and both ends of the plate member 61 are fixed to the connection member 5 and the base material side protrusion 55 by screws or the like. In the cascade process, a plate member 61 such as a flat steel is erected from the connecting member 5 to the base material side protruding portion 55, so that the movement of the subsequent steel sheet pile 4 in the wall width direction Z is restrained by the plate member 61. .

  In the longitudinal joining process, as shown in FIG. 17, when the shaft member 62 is provided as the restraining member 1, the shaft member 62 is in a state where the base material side protrusion 55 and the connection side protrusion 50 are locked to each other. Is provided continuously from the connecting member 5 to the base material side protrusion 55. In the cascading step, the shaft member 62 such as a bolt is continuously provided from the connecting member 5 to the base material side protrusion 55, so that the movement of the subsequent steel sheet pile 4 in the wall width direction Z is restrained by the shaft member 62. The

  In the longitudinal joining process, as shown in FIG. 18, when the flange member 63 is provided as the restraining member 1, the connection side protrusion 50 and the base material side protrusion 55 are partially cut away in the wall width direction Z. In addition, a notch groove 63a is formed in the connection side protrusion 50 and the base material side protrusion 55. In the longitudinal piecing process, in the state where the base material side protrusion 55 and the connection side protrusion 50 are locked to each other, the material shaft is inserted into the notch groove 63a formed in the base material side protrusion 55 and the connection side protrusion 50. The flange member 63 is attached to the connecting member 5 by fitting the flange member 63 having a substantially rectangular cross section extending continuously in the direction Y.

  In the cascading step, the connection-side protrusion 50 and the base-material-side protrusion 55 are locked to the flange member 63, so that the movement of the subsequent steel sheet pile 4 in the wall width direction Z is restrained by the flange member 63. The eaves member 63 may be used when the base material side protrusion 55 is provided at the leading end 30, but particularly when the base material protrusion 55 is provided at the trailing side end 40. By using it, it is possible to prevent the collar member 63 fitted in the notch groove 63a from falling off due to its own weight.

  In the cascade construction method to which the present invention is applied, the movement of the trailing steel sheet pile 4 in the wall width direction Z can be restrained by the restraining member 1 in both the first embodiment and the second embodiment. Thereby, in the cascade construction method to which this invention is applied, as shown in FIGS. 9-11, the joint part 2d of the subsequent steel sheet pile 4 is smoothly fitted to the joint part 2d of the adjacent connection steel member 70. FIG. Thus, a plurality of steel members can be easily and quickly connected to each other in the material axis direction Y. In the cascade construction method to which the present invention is applied, the joint-like member 6 of the first embodiment and the frame member 60 of the second embodiment can be used in combination.

  In the cascade construction method to which the present invention is applied, the joint-like member 6 is provided as the restraining member 1 in the first embodiment, or the frame member 60 shown in FIGS. 15 to 18 in the second embodiment. By being provided as the restraining member 1, after the joint portion 2 d of the subsequent steel sheet pile 4 is fitted to the joint portion 2 d of the adjacent connecting steel member 70, the restraining member 1 such as the joint-like member 6 or the frame member 60. Can be removed and reused. Thereby, in the cascade construction method to which the present invention is applied, it is possible to suppress an increase in material cost of the joint-like member 6 provided as the restraining member 1.

  Furthermore, in the cascade construction method to which the present invention is applied, by connecting a plurality of steel members with the connecting member 5, a sufficient bending rigidity is ensured at a location where the plurality of steel members are connected, and structurally. It becomes a weak point, and it becomes possible to avoid a decrease in bending performance of the entire connected steel member 70 in which a plurality of steel members are connected in the material axis direction Y.

  The cascade construction method to which the present invention is applied is used for connecting a plurality of steel members having a predetermined cross-sectional shape to each other in the material axis direction Y, mainly as shown in FIGS. The plurality of steel sheet piles 2 are connected by the connecting member 5. In the second embodiment, the cascade construction method to which the present invention is applied is a H-section steel 24 having a substantially H-shaped cross section shown in FIG. 19A and a rectangular steel pipe having a substantially rectangular cross-section shown in FIG. 19B. 25 or a circular steel pipe 26 having a substantially circular cross section shown in FIG. 19 (c) can be connected by a connecting member 5 as a plurality of steel members having a predetermined cross sectional shape.

  As mentioned above, although the example of embodiment of this invention was demonstrated in detail, all the embodiment mentioned above showed only the example of actualization in implementing this invention, and these are the technical aspects of this invention. The range should not be interpreted in a limited way.

1: Restraining member 2: Steel sheet pile 2a: Flange part 2b: Web part 2c: Arm part 2d: Joint part 20: Flat surface 21: Hat-shaped steel sheet pile 22: U-shaped steel sheet pile 23: Z-shaped steel sheet pile 24: H-shaped Steel 25: Square steel pipe 26: Circular steel pipe 3: Leading steel sheet pile 30: Leading side end part 4: Trailing steel sheet pile 40: Trailing side end part 5: Connecting member 5a: Lower end face 5b: Upper end face 50: Connecting side protrusion Part 51: Flat plate part 52: Locking groove 54: Base material steel plate 55: Base material side protrusion 6: Joint-like member 6a: Claw part 6b: Extending part 6c: Holding plate 6d: Construction part 60: Frame member 60a: Horizontal Frame portion 60b: upper frame portion 61: plate member 62: shaft member 63: flange member 63a: notch groove 7: steel wall 70: connecting steel member 70a: upper end portion 8: ground X: material axis orthogonal direction Y: Material axis direction Z: Wall width direction

Claims (6)

It is a cascade construction method for connecting a plurality of steel members having a predetermined cross-sectional shape in the material axis direction,
A longitudinal connection step of connecting the ends in the axial direction of each material facing each other with a plurality of steel members;
In the cascade step, an end of the succeeding steel member is moved by moving a succeeding steel member serving as the succeeding steel member in the wall width direction with respect to the preceding steel member serving as the preceding steel member. The trailing side end and the leading side end are aligned with each other in the wall width direction while the trailing side end serving as the portion and the leading side end serving as the end of the preceding steel member are aligned in the wall width direction. The longitudinal construction method is characterized in that the movement in the wall width direction of the succeeding steel member is restrained by a restraining member while being connected in the direction. While steel sheet piles are used for the preceding steel member and the following steel member,
In the cascade step, after fitting a joint-like member serving as the restraining member to a joint portion of the preceding steel sheet pile serving as the preceding steel member, a joint portion of the succeeding steel sheet pile serving as the succeeding steel member The joint construction method according to claim 1, wherein the joint-like member is fitted and the movement of the succeeding steel member in the wall width direction is restricted by the joint-like member. In the cascading step, the trailing side end and the leading side end are aligned in the wall width direction, and formed at one or both of the leading side end and the trailing side end. In the state where the connecting side protrusion formed on the connecting member erected from the trailing side end to the leading side end is locked to the base material side protruding part, the trailing side end and the leading side The longitudinal construction method according to claim 1, wherein the side end portion is connected in the material axis direction. In the longitudinal connection step, a frame member that is surrounded in a state where the connection-side protrusion and the base material-side protrusion are engaged with each other, and a plate member that extends from the connection member to the base material-side protrusion Either or both of these are provided in the said connection member as the said restraint member. The cascade construction method of Claim 3 characterized by the above-mentioned. In the longitudinal connection step, the shaft member continuously penetrated from the connecting member to the base material side protrusion, and the notch groove formed in the connection side protrusion and the base material side protrusion is fitted. Either or both of the made eaves members are provided in the connection member as the restraint member. The cascade construction method according to claim 3 or 4. A constraining member for connecting a plurality of steel sheet piles in the material axis direction,
A joint-like member fitted to the joint portion of the preceding steel sheet pile that becomes the preceding steel sheet pile and the joint portion of the subsequent steel sheet pile that becomes the subsequent steel sheet pile,
The joint-shaped member is configured so that the following steel is in a state in which a trailing side end serving as an end of the following steel sheet pile and a leading side end serving as an end of the preceding steel sheet pile face each other in the material axis direction. A restraint member characterized by being provided continuously from a joint portion of a sheet pile to a joint portion of the succeeding steel sheet pile.

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