JPS5817788Y2 - steel pipe sheet piles - Google Patents

Description

【考案の詳細な説明】 本考案は土木工事の仮締切、護岸等の連続壁に用いられ
る鋼管矢板に関する。[Detailed description of the invention] The present invention relates to steel pipe sheet piles used for temporary cofferdams in civil engineering works, continuous walls of seawalls, etc.

従来、地盤の状況等により、複数の鋼管矢板を継ぎ合せ
ながら打設する場合、第１図に示すように鋼管等からな
る矢板本管１の外周に、該矢板本管１の両端部近傍を除
いて、鋼管等からなり長手方向にスリットを有する継手
部材２をその全長にわたって溶接３すると共にその端部
において矢板本管１の周方向にも溶接した鋼管矢板を適
当な深さまで打設し、次に前記鋼管矢板と同様に矢板本
管４の外周に継手部材５を溶接６してなる鋼管矢板の矢
板本管４の下端と既に適当な深さまで打設した鋼管矢板
の矢板本管１の上端とを溶接７にて接続し、次に上側の
鋼管矢板の継手部材５と下側の鋼管矢板の継手部材２と
の間に補助継手部材８を挿入し、該補助継手部材８と矢
板本管１との接触部分および補助継手部材８と継手部材
２，５との接触部分を溶接９した後、所定の深さまで打
設し、以下接続本数に応じて上記工程を繰り返す方法が
とられていた。Conventionally, when installing multiple steel pipe sheet piles while splicing them together depending on the ground condition, etc., as shown in Fig. 1, the outer periphery of the main sheet pile 1 made of steel pipes, etc., is placed near both ends of the main sheet pile 1. A joint member 2 made of a steel pipe or the like and having a slit in the longitudinal direction is welded 3 along its entire length, and a steel pipe sheet pile is welded to an appropriate depth in the circumferential direction of the main sheet pile pipe 1 at the end thereof, Next, similarly to the steel pipe sheet pile described above, a joint member 5 is welded 6 to the outer periphery of the main sheet pile 4 of the steel pipe sheet pile, and the lower end of the main pipe 4 of the steel pipe sheet pile is connected to the main pipe 1 of the steel pipe sheet pile, which has already been driven to an appropriate depth. The upper ends are connected by welding 7, and then the auxiliary joint member 8 is inserted between the joint member 5 of the upper steel pipe sheet pile and the joint member 2 of the lower steel pipe sheet pile, and the auxiliary joint member 8 and the sheet pile are connected. After welding 9 the contact area with the pipe 1 and the contact area between the auxiliary joint member 8 and the joint members 2 and 5, the weld is cast to a predetermined depth, and the above steps are repeated depending on the number of connections. Ta.

ところが継手部材２，５と矢板本管１゜４との接触部の
溶接３，６および継手部材２，５端部の矢板本管周方向
の溶接時の熱の影響のため継手部材２，５端部近傍およ
び矢板本管１，４端部近傍において矢板本管１，４が局
部変形し、継手部材２と継手部材５との間に補助継手部
材８を挿入する際に、継手部材２，５と補助継手部材８
との間に段差を生じ、うまく溶接９できなかった。However, due to the influence of heat during welding 3, 6 at the contact portion between the joint members 2, 5 and the sheet pile main pipe 1゜4 and during welding in the circumferential direction of the sheet pile main pipe at the end of the joint members 2, 5, the joint members 2, 5 The sheet pile main pipes 1, 4 are locally deformed near the ends and near the ends of the sheet pile main pipes 1, 4, and when the auxiliary joint member 8 is inserted between the joint member 2 and the joint member 5, the joint member 2, 5 and auxiliary joint member 8
There was a difference in level between the two, and welding could not be performed successfully9.

本考案は上記欠点を解消するものであり、以下その一実
施例を図面に基づいて説明する。The present invention is intended to eliminate the above-mentioned drawbacks, and one embodiment thereof will be described below with reference to the drawings.

第２図において１０は鋼管などからなる矢板本管であり
、該矢板本管１０の外周面には該矢板本管１０の両端よ
り約３００ ｍｍの範囲を除いて管軸心と平行に鋼管な
どからなり管軸方向にスリットを有する継手部材１１が
その一端よ’）１００ｍｍ程度の未溶接部１２を残して
溶接１３されている。In FIG. 2, reference numeral 10 indicates a main sheet pile made of steel pipes, etc., and on the outer peripheral surface of the main sheet pile 10 there are steel pipes etc. parallel to the pipe axis, except for a range of about 300 mm from both ends of the main sheet pile 10. A joint member 11 having a slit in the tube axis direction is welded 13 at one end, leaving an unwelded portion 12 of about 100 mm.

また該継手部材１１他端は矢板本管１０周方向にも溶接
されている。Further, the other end of the joint member 11 is also welded in the circumferential direction of the sheet pile main pipe 10.

次に施工手順を説明する。Next, the construction procedure will be explained.

まず上記構成の鋼管矢板を未溶接部１２ ａに近い側の
端部が上側となるように適当な深さまで打設する。First, the steel pipe sheet pile having the above structure is driven to an appropriate depth so that the end near the unwelded portion 12a is on the upper side.

次に同様な構成の鋼管矢板の矢板本管１０ ｂを未溶接
部１２ｂに近い側の端部が下側となるように既に適当な
深さまで打設した鋼管矢板の矢板本管１０ ａ上に載せ
、その接触部を溶接１４する。Next, a sheet pile main pipe 10b of a similar structure is placed on top of the main sheet pile 10a of a steel pipe sheet pile, which has already been driven to an appropriate depth so that the end closest to the unwelded portion 12b is on the lower side. The contact portion is welded 14.

次に下側の鋼管矢板の継手部材１１ ａと上側の鋼管矢
板の継手部材１１ ｂとの間に補助継手部材１５を挿入
する。Next, the auxiliary joint member 15 is inserted between the joint member 11 a of the lower steel pipe sheet pile and the joint member 11 b of the upper steel pipe sheet pile.

このとき継手部材１１ ａ、１１ ｂと矢板本管１０ａ
、１０ｂとは未溶接部１２ａ、１２ｂを残して溶接して
いるので、継手部材１１ ａ、１１ ｂノ未溶接部１２
ａ 、１２ ｂ側の端部近傍の矢板本管１０ ａ 、
１０ ｂ、および矢板本管１０ａ、１０ｂの未溶接部１
２ ａ 、１２ ｂに近い側の端部は溶接１３ ａ 、
１３ ｂ時の熱の影響を受けず局部起形していないので
、継手部材１１ ａ、１１ ｂと補助継手部材１５との
間に段差を生じるようなことがない。At this time, the joint members 11a, 11b and the sheet pile main pipe 10a
, 10b are welded leaving the unwelded parts 12a, 12b, so the unwelded parts 12 of the joint members 11a, 11b
A, 12 Sheet pile main pipe 10a near the end on the b side,
10b, and unwelded parts 1 of sheet pile main pipes 10a and 10b
2 a , the end closer to 12 b is welded 13 a ,
Since the joint members 11a, 11b and the auxiliary joint member 15 are not affected by the heat generated during the step 13b and are not locally shaped, there is no possibility that a difference in level will occur between the joint members 11a, 11b and the auxiliary joint member 15.

次に上側の鋼管矢板を所定の深さまで打設する。Next, the upper steel pipe sheet pile is driven to the specified depth.

以上で継ぎ合わせの鋼管矢板１本の打設作業を終了し、
次に第４図のように継手部材１１Ｃ，１１ｄを互いに噛
合させて上記手順によって鋼管矢板の打設を順次行なう
ことにより、鋼管矢板による連続壁が形成される。This completes the installation of one jointed steel pipe sheet pile.
Next, as shown in FIG. 4, the joint members 11C and 11d are engaged with each other and the steel pipe sheet piles are sequentially driven according to the above procedure, thereby forming a continuous wall of the steel pipe sheet piles.

なお上記実施例においては、鋼管矢板を２本継ぎ合わせ
た場合について説明したが、３本以上継ぎ合わせる場合
には、継ぎ合わせた状態で両端に位置する鋼管矢板以外
の鋼管矢板として、継手部材１１の両端部近傍に未溶接
部１２を残したものを用いて順次実施例に示した如く継
ぎ合わせていけは゛良い。In the above embodiment, the case where two steel pipe sheet piles are joined together has been described, but when three or more steel pipe sheet piles are joined together, the joint member 11 is used as the steel pipe sheet pile other than the steel pipe sheet piles located at both ends in the joined state. It is preferable to leave unwelded portions 12 near both ends of the material and join them one after another as shown in the embodiment.

また上記実施例においては、矢板本管１０端部から約３
ＱＱ ｍｍ内側に継手部材１１端部が位置するようにす
ると共に、未溶接部１２を約１００ ｍｍ設けたが、こ
れは各種設計条件により適宜流められるものであり、必
ずしも上記の寸法である必要はない。In addition, in the above embodiment, approximately 3
The end of the joint member 11 was positioned inside QQ mm, and an unwelded part 12 of about 100 mm was provided, but this can be adjusted as appropriate depending on various design conditions, and it is not necessarily necessary to have the above dimensions. There isn't.

また上記実施例においては、パイプ状の継手部材１１を
用いたが、これは第５図のようにパイプ状の継手部材１
７ ａ 、１７ ｂと断面Ｔ字型の継手部材１８ ａ
、１８ ｂとの組合せ、あるいな第６図のように断面箱
型の継手部材１９ ａ 、１９ ｂと断面Ｔ字型の継手
部材２０ａ 、２０ ｂとの組合せ等、他の形状のもの
であっても良い。Further, in the above embodiment, the pipe-shaped joint member 11 was used, but this is different from the pipe-shaped joint member 11 as shown in FIG.
7 a, 17 b and a T-shaped cross-section joint member 18 a
, 18b, or a combination of box-shaped joint members 19a, 19b and T-shaped joint members 20a, 20b as shown in FIG. It's okay.

以上説明したように、本考案にかかる鋼管矢板によれば
、鋼管の外周に管軸心と平行に継手部材を少なくとも一
方の端部より所要長さの未溶接部を残して溶接付けして
なるので、鋼管矢板を継ぎ合わせる工程で、継手部材間
に補助継手部材を挿入する際に、継手部材と補助継手部
材との間に段差を生じるようなことがないため、迅速か
つ確実に溶接し得、したがって強度が大であると共に打
設に要する工期を短縮し得る。As explained above, according to the steel pipe sheet pile according to the present invention, the joint member is welded to the outer periphery of the steel pipe parallel to the pipe axis, leaving an unwelded part of a required length from at least one end. Therefore, when inserting the auxiliary joint member between the joint members in the process of joining steel pipe sheet piles, there is no difference in level between the joint member and the auxiliary joint member, so welding can be performed quickly and reliably. Therefore, the strength is high and the construction period required for pouring can be shortened.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の鋼管矢板を継ぎ合わせた例を示す側面図
、第２図〜第６図は本考案の実施例を示し、第２図はそ
の側面図、第３図は継ぎ合わせた場合の側面図、第４図
〜第６図はそれぞれ異なる継手部材の噛合状態を示す模
式横断面図である。 １０・・・・・・矢板本管、１１・・・・・・継手部材
、１２・・・・・・未溶接部、１３・・・・・・溶接。Fig. 1 is a side view showing an example of conventional steel pipe sheet piles spliced together, Figs. 2 to 6 show examples of the present invention, Fig. 2 is a side view thereof, and Fig. 3 is a case where they are spliced together. The side view and FIGS. 4 to 6 are schematic cross-sectional views showing the meshing states of different joint members, respectively. 10... Sheet pile main pipe, 11... Joint member, 12... Unwelded portion, 13... Welded.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 鋼管の外周に管軸心と平行に継手部材を該継手部材の少
なくとも一方の端部より所要長さの未溶接部を残して溶
接付けしてなる鋼管矢板。A steel pipe sheet pile formed by welding a joint member to the outer periphery of a steel pipe parallel to the pipe axis, leaving an unwelded portion of a required length from at least one end of the joint member.