JP7126889B2 - Steel wall and its construction method - Google Patents

Steel wall and its construction method Download PDF

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JP7126889B2
JP7126889B2 JP2018133045A JP2018133045A JP7126889B2 JP 7126889 B2 JP7126889 B2 JP 7126889B2 JP 2018133045 A JP2018133045 A JP 2018133045A JP 2018133045 A JP2018133045 A JP 2018133045A JP 7126889 B2 JP7126889 B2 JP 7126889B2
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sheet pile
pile foundation
steel sheet
bank
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JP2020012246A (en
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修史 関口
大輔 竹内
好弓 田中
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株式会社横河Ｎｓエンジニアリング
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters

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Description

本発明は、地盤内に凹凸が矢板法線方向に連続して配置される複数の鋼矢板からなる鋼矢板基礎を備えた鋼製壁およびその構築工法に関し、例えば、堤防や防波堤、或いは防潮堤などの海岸・河岸保全施設、さらには陸上の擁壁構造物などの特に壁部(上部工)の構築に適し、短期施工および経済施工等を可能にしたものである。 The present invention relates to a steel wall provided with a steel sheet pile foundation composed of a plurality of steel sheet piles in which irregularities are continuously arranged in the ground in the direction of the normal line of the sheet pile, and a construction method thereof. It is suitable for the construction of coastal and river bank protection facilities such as the above, and especially for the construction of walls (superstructures) such as retaining wall structures on land, enabling short-term construction and economical construction.

例えば、海岸や河岸などの水ぎわに構築される堤防や防波堤、或は防潮堤などの海岸・河岸保全施設として、地盤内に凹凸が矢板法線方向に連続して配置される複数の鋼矢板からなる鋼矢板基礎(下部工)を備え、鋼矢板基礎の上に現場打ちRC構造やプレキャストRC構造によって構築されたものが知られている。 For example, as embankments and breakwaters built along waterways such as coasts and riverbanks, or as coastal and riverbank protection facilities such as seawalls, multiple steel sheet piles in which unevenness in the ground is continuously arranged in the normal direction of the sheet pile It is known that a steel sheet pile foundation (substructure) is provided and constructed by a cast-in-place RC structure or a precast RC structure on the steel sheet pile foundation.

例えば、特許文献１には、地震時に液状化の可能性のある液状化層を含む軟弱地盤(重量構造物を支持するＮ値が10未満の地盤)に鋼矢板または鋼管矢板からなる護岸矢板壁を打設し、その背面側に控え工を打設し、かつ護岸矢板壁と控え工間をタイ材で連結することにより護岸矢板壁と控え工間の地盤改良を実施し、さらに護岸矢板壁を構成する複数の鋼矢板または鋼管矢板の上端部にこれを包囲するようにコンクリートを打設してコーピングを設け、その上にRC構造の重量構造物を設置してなる護岸構造の発明が開示されている(特許文献１、図１参照)。 For example, in Patent Document 1, a revetment sheet pile wall made of steel sheet piles or steel pipe sheet piles on soft ground (ground with an N value of less than 10 that supports heavy structures) containing a liquefied layer that may liquefy during an earthquake and the backing work is cast on the back side, and the ground between the revetment sheet pile wall and the backing work is improved by connecting the revetment sheet pile wall and the backing work with a tie material, and the revetment sheet pile wall A revetment structure is disclosed in which a coping is provided by placing concrete on the upper end of a plurality of steel sheet piles or steel pipe sheet piles to surround them, and a heavy RC structure is installed on it. (Patent Document 1, see FIG. 1).

特許第5471797号公報Patent No. 5471797 特許第6082916号公報Patent No. 6082916 特許第5882438号公報Patent No. 5882438 特許第5245929号公報Patent No. 5245929 特許第6091440号公報Patent No. 6091440

しかし、現場打ちRC構造やプレキャストRC構造の防波堤や防潮堤などの海岸・河岸保全施設は、特に水ぎわの浸食防止を目的とする壁部の構築にあたっては、これまで以下に提示するような課題があった。 However, coastal and riverbank protection facilities such as breakwaters and seawalls of cast-in-place RC structures and precast RC structures have had the following problems, especially in the construction of walls aimed at preventing water erosion. there were.

(1)壁部がコンクリート部材のため、上部工の死荷重が大きくなる。
(2)鋼矢板基礎と上部工との接合については、鋼矢板基礎とフーチングを現場配筋による鉄筋によって接合し、さらにフーチングと壁部を現場配筋による鉄筋によって接合する必要があるため、施工が煩雑になり、工期の長期化が避けられない。
(3)地震時慣性力が増大するため、これに備えるべく鋼矢板基礎の抵抗断面やフーチング構造を大型化する必要がある。 (1) Since the walls are made of concrete, the dead load of the superstructure increases.
(2) Regarding the connection between the steel sheet pile foundation and the superstructure, it is necessary to connect the steel sheet pile foundation and the footing with reinforcing bars arranged on-site, and further connect the footing and the wall with reinforcing bars arranged on-site. becomes complicated and lengthening of the construction period is unavoidable.
(3) Since the inertia force increases during an earthquake, it is necessary to increase the size of the resistance cross section of the steel sheet pile foundation and the footing structure in order to prepare for this.

(4)液状化に伴う基礎地盤の不同沈下による影響が大きくなる。
(5)現場の配筋作業が煩雑かつ膨大となり、壁部の構築により多くの工期と多大な労力を必要とする。
(6)現場打コンクリート等の現地調達材の量が膨大になる。 (4) The impact of differential subsidence of the foundation ground due to liquefaction increases.
(5) Reinforcement work at the site becomes complicated and enormous, requiring a long construction period and a great deal of labor due to the construction of the wall.
(6) The amount of locally procured materials such as cast-in-place concrete becomes enormous.

本発明は、これらの課題を解決すべくなされたもので、堤防や防波堤、防潮堤などの海岸・河岸保全施設、さらには陸上の擁壁構造物などの特に壁部(上部工)の構築に適し、短期施工および経済施工等を可能にした鋼製壁およびその構築工法を提供することを目的とするものである。 The present invention was made to solve these problems, and is particularly useful for constructing coastal and riverbank protection facilities such as embankments, breakwaters, and seawalls, and especially walls (superstructures) such as retaining wall structures on land. It is an object of the present invention to provide a steel wall and a construction method thereof that are suitable, capable of short-term construction, economical construction, and the like.

本発明は、地盤内に凹凸が矢板法線方向に連続して配置される複数の鋼矢板からなる鋼矢板基礎を備えてなる鋼製壁の発明であり、前記鋼矢板基礎の堤外側に矢板法線方向に互いに隣接して配置された複数の鋼製壁パネルから構成され、前記鋼製壁パネルは前記鋼矢板基礎の堤外側および堤内側の凹部にそれぞれ配置された複数の鋼製骨部材および鋼製控え部材と、前記鋼製骨部材の堤外側に配置された鋼製面材とを備え、かつ前記鋼矢板基礎の堤外側および堤内側にコンクリートが打設されてなることを特徴とするものである。 The present invention is an invention of a steel wall comprising a steel sheet pile foundation composed of a plurality of steel sheet piles in which unevenness is continuously arranged in the ground in the normal direction of the sheet pile, and a sheet pile on the outer side of the steel sheet pile foundation. It comprises a plurality of steel wall panels arranged adjacent to each other in the normal direction, said steel wall panels comprising a plurality of steel frame members respectively arranged in recesses on the outer side and the inner side of said steel sheet pile foundation. and a steel stay member, and a steel face member arranged on the outer side of the bank of the steel frame member, and concrete is placed on the outer side and the inner side of the bank of the steel sheet pile foundation. It is something to do.

鋼矢板基礎は、完成時の鋼製壁の全長に渡って必ずしも連続している必要はなく、数本の鋼矢板から一定長に構築されたものが所定間隔おきに配置されていてもよく、さらに地盤の状況等に応じてその長さ(幅)が違っていてもよい。 The steel sheet pile foundation does not necessarily have to be continuous over the entire length of the steel wall when completed, and several steel sheet piles constructed with a certain length may be arranged at predetermined intervals. Furthermore, the length (width) may be different depending on the condition of the ground.

前記鋼製壁パネルは工場製作することにより、輸送や設置時の取り扱い等を考慮して適切な大きさに製作することができ、必要に応じて金属溶射と塗装等による防錆処理、或いはモルタル吹付による防錆処理などを行うことにより耐久性を著しく高めることができる。 By manufacturing the steel wall panel in a factory, it can be manufactured in an appropriate size in consideration of handling during transportation and installation. Durability can be remarkably improved by applying antirust treatment by spraying.

隣接する各鋼製壁パネル間は、接続パネルまたはボルト接合などによって機械的に接合することで、熟練を必要とする現場溶接を無くして鋼製壁パネル間の接合を効率的に行うことができる。 Adjacent steel wall panels can be mechanically joined by connecting panels or bolted joints to efficiently join steel wall panels without on-site welding that requires skill. .

特に、接続パネルによる接合は、例えば、各接続パネルの縁端部に嵌合部(嵌合溝等)を設け、当該嵌合部を各鋼製壁パネルの鋼製骨部材と嵌合させることによりボルトレスや溶接レスを可能とすることができる。また、嵌合部に止水性を保持するためのパッキンを設置することにより接続部の止水性を確保することができる。さらに、嵌合部に余長を設けることにより、各鋼製壁パネル間の接合部における矢板法線方向の誤差を容易に吸収することができる。 In particular, joining by connecting panels is achieved by, for example, providing fitting portions (fitting grooves, etc.) at the edges of each connecting panel and fitting the fitting portions with the steel frame members of each steel wall panel. It is possible to enable boltless and weldingless. In addition, by installing a packing for retaining water resistance in the fitting portion, the water resistance of the connecting portion can be ensured. Furthermore, by providing the fitting part with extra length, it is possible to easily absorb the error in the sheet pile normal direction at the joint between the steel wall panels.

一方、ボルト接合による接合は、例えば、隣接する各鋼製壁パネルの縁端部に溝形鋼などからなる接続鋼材を双方のウェブが背合わせ状態に配置し、当該ウェブどうしをボルト接合することにより、各鋼製壁パネル間を容易に接合することができる。なお、接合ボルトには防錆ボルトや普通ボルト等を使用することができ、特に長期防錆機能を保持させるために、接続部にコンクリートやモルタルを打設してもよい。 On the other hand, joining by bolting involves, for example, placing connecting steel materials such as channel steel on the edges of adjacent steel wall panels so that both webs are back-to-back, and bolting the webs together. allows easy joining between each steel wall panel. As the connecting bolt, a rust-preventive bolt, a normal bolt, or the like can be used, and concrete or mortar may be placed at the connecting portion in order to maintain a long-term rust-preventive function.

また、前記各鋼製壁パネルの鋼製骨部材と鋼製控え部材は、鋼矢板基礎の堤外側と堤内側の凹部に鋼矢板基礎を両側から挟み込むように、かつ矢板法線方向に交互に配置し、そして前記鋼矢板基礎の堤外側および堤内側にコンクリートを打設することにより、各鋼製壁パネルの下端部を鋼矢板基礎に一体的に接合することができる。 In addition, the steel frame members and the steel stay members of each steel wall panel are arranged alternately in the sheet pile normal direction so as to sandwich the steel sheet pile foundation from both sides in the recesses on the outer side and the inner side of the steel sheet pile foundation. By arranging and pouring concrete on the bank side and bank side of the steel sheet pile foundation, the lower end of each steel wall panel can be integrally joined to the steel sheet pile foundation.

なお、当該部コンクリートの打設の際は、鋼製控え部材の堤内側に予め鋼製型枠を取り付けておくことも可能であり、そうすることで現場での型枠作業を省略することができる。また、鋼製型枠は、堤内側のコンクリート塊が押し出される作用状態において、引張り鋼材として機能させることができる。 In addition, when placing the concrete in this area, it is also possible to attach a steel formwork in advance to the inner side of the embankment of the steel stay member, so that formwork work at the site can be omitted. can. In addition, the steel formwork can function as a tensile steel material in the operating state in which the concrete mass inside the bank is pushed out.

鋼製型枠を使用しない場合は、鉄筋などの引張り鋼材をコンクリート内に配筋してもよい。現場打ちコンクリートは、鋼矢板基礎頭部の鋼製壁パネルとの接合部のみに打設すればよいため、現場調達資材の省力化が可能となる。 If steel formwork is not used, tensile steel such as rebar may be placed in the concrete. Since the cast-in-place concrete only needs to be placed at the joints between the steel sheet pile foundation heads and the steel wall panels, it is possible to save on-site procurement of materials.

このような構成により各鋼製壁パネルの下端部が鋼矢板基礎に接合されていることで、鋼矢板基礎に対して堤外側の凹部に配置された鋼製骨部材が堤外側から外力を受けたときに、鋼矢板基礎によって仕切られた堤外側のコンクリート塊が鋼矢板基礎から引き剥がされようとするが、鋼矢板基礎の堤内側の凹部に配置された鋼製控え材で拘束されたコンクリート塊が鋼矢板基礎を押し込むように作用することで、当該部コンクリートから鋼製壁パネルが脱落することなく一体として挙動させることが可能になる。一方、堤内側からの外力に対しては、鋼製骨部材と鋼製控え部材の関係を逆として同様の作用状態として挙動させることが可能となる(図５参照)。 With this configuration, the lower end of each steel wall panel is joined to the steel sheet pile foundation, so that the steel frame members arranged in the recess on the outer side of the bank with respect to the steel sheet pile foundation receive external force from the outer side of the bank. At this time, the concrete mass on the outside of the bank partitioned by the steel sheet pile foundation was about to be torn off from the steel sheet pile foundation, but the concrete was constrained by the steel stays placed in the recessed area inside the steel sheet pile foundation. The mass acts to push the steel sheet pile foundation into place, allowing the steel wall panels to behave as one piece without falling out of the concrete. On the other hand, with respect to the external force from the inside of the bank, it is possible to reverse the relationship between the steel frame member and the steel stay member to behave in the same state of action (see FIG. 5).

また、鋼製骨部材と鋼製控え部材は、鋼矢板基礎からある程度離隔をもって配置することで、鋼矢板基礎を構成する鋼矢板の打設時の出入り誤差を吸収することが可能となり、鋼製壁パネル設置時の調整にかかる工数を大幅に削減することができる。 In addition, by arranging the steel frame members and the steel stay members with a certain distance from the steel sheet pile foundation, it is possible to absorb the error in entering and exiting the steel sheet piles that make up the steel sheet pile foundation when driving. It is possible to greatly reduce the man-hours required for adjustment at the time of wall panel installation.

さらに、鋼製控え部材は、鋼製壁パネル設置時の転倒防止部材としても機能させることが可能であり、安全性の向上にも期待できる。 Furthermore, the steel stay member can also function as a fall prevention member when the steel wall panel is installed, and can be expected to improve safety.

また、当該部コンクリートの打設時には、鋼製控え部材の堤内側に予め鋼製型枠を取り付けておくことも可能であり、こうすることで現場での型枠作業を省略することができる。 In addition, it is possible to attach a steel formwork to the inside of the bank of the steel stay member in advance when the concrete is placed, thereby omitting formwork work on site.

この鋼製型枠は、堤内側のコンクリート塊が押し出される作用状態において、引張り鋼材として機能させることができる。 This steel formwork can function as a tensile steel material in an operating state in which the concrete mass inside the embankment is pushed out.

なお、鋼製型枠を使用しない場合は、鉄筋などの引張り鋼材をコンクリート内に配筋するこができる。なお、現場打ちコンクリートは、鋼矢板頭部の鋼製壁との接合部のみのため、現場調達資材の省力化が可能となる。 If a steel formwork is not used, tensile steel such as reinforcing bars can be placed in the concrete. In addition, since the cast-in-place concrete is used only at the joints between the head of the steel sheet pile and the steel wall, it is possible to save labor in materials procured at the site.

本発明によれば、以下に記載するような効果を奏する。
(1)壁部が複数の鋼製壁パネルにより構築されていることで、上部工の死荷重が大幅に軽減され、耐震性が大幅に向上する。また、複数の鋼製壁パネルを鋼矢板基礎の矢板法線方向に互いに隣接させて配置し、各鋼製壁パネル間を鋼製接続パネルまたはボルト接合によって接合し、かつ鋼矢板基礎の堤外側と堤内側にコンクリートを打設して各鋼製壁パネルと鋼矢板基礎間が一体的に接続することにより構築されているため、現場施工の大幅な省力化、簡略化および工期の短縮化等を図ることができる。 ADVANTAGE OF THE INVENTION According to this invention, there exists an effect as described below.
(1) The walls are constructed with multiple steel wall panels, which greatly reduces the dead load of the superstructure and greatly improves the earthquake resistance. In addition, a plurality of steel wall panels are arranged adjacent to each other in the sheet pile normal direction of the steel sheet pile foundation, the steel wall panels are joined by steel connection panels or bolt joints, and Since it is built by pouring concrete into the inner side of the embankment and integrally connecting each steel wall panel and the steel sheet pile foundation, the on-site construction is greatly labor-saving, simplified and shortened the construction period. can be achieved.

(2)特に、鋼矢板基礎と各鋼製壁パネル(上部工)との接合については、各鋼製矢板パネルの下端部に鋼矢板基礎と各鋼製壁パネル間の一体化に必要な最小限のコンクリートを打設するだけでよいので、現場施工の大幅な省力化、工期の短縮化等を図ることができ、また現場打コンクリート等の現地調達材の量が大幅に削減すことができ、経済施工も図れる。 (2) In particular, for joining the steel sheet pile foundation and each steel wall panel (superstructure), the minimum required for integration between the steel sheet pile foundation and each steel wall panel is placed at the lower end of each steel sheet pile panel. Since it is only necessary to place a limited amount of concrete, it is possible to significantly reduce the labor required for on-site construction and shorten the construction period. , Economic construction can also be planned.

(3)軽量化により地震時慣性力が低減されることで、これに備えるべく鋼矢板基礎の抵抗断面やフーチング構造を縮小化することかでき、また
液状化に伴う基礎地盤の不同沈下による影響を低減することができる。 (3) By reducing the inertial force during an earthquake by reducing the weight, it is possible to reduce the resistance cross section of the steel sheet pile foundation and the footing structure to prepare for this, and the impact of uneven subsidence of the foundation ground due to liquefaction. can be reduced.

本発明の一実施形態を図示したものであり、鋼矢板基礎の上に構築中の鋼製壁を示す斜視図である。1 is a perspective view of a steel wall being built on a steel sheet pile foundation, illustrating an embodiment of the present invention; FIG. 図2(a)は、鋼矢板基礎の上に設置される鋼製壁パネルの斜視図、図2(b)は各鋼製壁パネル間に設置される鋼製接続パネルの斜視図である。FIG. 2(a) is a perspective view of steel wall panels installed on the steel sheet pile foundation, and FIG. 2(b) is a perspective view of steel connection panels installed between the steel wall panels. 隣接する鋼製壁パネルと当該パネル間に設置された鋼製接続パネルを示す斜視図である。Figure 2 is a perspective view showing adjacent steel wall panels and a steel connecting panel installed between them; 図4(a),(b)は、鋼矢板基礎と当該基礎の上に設置された鋼製壁パネルとの接続部を示す斜視図である。FIGS. 4(a) and 4(b) are perspective views showing connecting portions between a steel sheet pile foundation and a steel wall panel installed on the foundation. 鋼矢板基礎と当該基礎上に設置された鋼製壁パネルおよび鋼製接続パネルとの接続部を示す横断面図である。FIG. 4 is a cross-sectional view showing a joint between a steel sheet pile foundation and steel wall panels and steel connection panels installed on the foundation; 図6(a),(b)は、それぞれ図５におけるイ－イ線、ロ－ロ線断面図である。6(a) and 6(b) are cross-sectional views taken along the E--I line and the Rollo line in FIG. 5, respectively. 本発明の他の実施形態を図示したものであり、鋼矢板基礎の上に構築中の鋼製壁を示す斜視図である。Fig. 10 illustrates another embodiment of the invention, showing a perspective view of a steel wall being built on a steel sheet pile foundation; 図8(a)は、鋼矢板基礎の上に設置される鋼製壁パネルの斜視図、図8(b)は隣接する鋼製壁パネル間のボルト接合による接続部の横断面図である。FIG. 8(a) is a perspective view of a steel wall panel installed on a steel sheet pile foundation, and FIG. 8(b) is a transverse cross-sectional view of a bolted connection between adjacent steel wall panels. 図9(a),(b)は、隣接する鋼製壁パネル間のボルト接合による接続部を示し、図9(a)は斜視図、図9(b)は横断面図である。FIGS. 9(a) and (b) show a bolted connection between adjacent steel wall panels, FIG. 9(a) being a perspective view and FIG. 9(b) being a cross-sectional view.

図１～図６は本発明の一実施形態であって、海岸保全施設として構築中の防潮堤の壁部を図示したものである。図において、複数の鋼矢板１からなる鋼矢板基礎Ａの直上に防潮堤の壁部となる鋼製壁Ｂが構築されている。 1 to 6 are one embodiment of the present invention and illustrate walls of a seawall under construction as a coastal protection facility. In the figure, a steel wall B, which will be the wall of the seawall, is constructed directly above a steel sheet pile foundation A composed of a plurality of steel sheet piles 1 .

鋼矢板１は、地盤内に凹凸が矢板法線方向に交互に連続して設置され、隣接する各鋼矢板1,1間は互い結合され、かつ各鋼矢板１の上端部分が地盤面より所定長、同一高さに立ち上げられ、鋼矢板全体で矢板法線方向に連続する鋼矢板基礎Ａが構築されている。 The steel sheet piles 1 are alternately and continuously installed in the ground in the direction of the sheet pile normal line, and the adjacent steel sheet piles 1, 1 are connected to each other, and the upper end portion of each steel sheet pile 1 is a predetermined distance from the ground surface. A steel sheet pile foundation A is constructed which is erected at the same height and is continuous in the sheet pile normal direction over the entire steel sheet pile.

鋼製壁Ｂは、鋼矢板基礎Ａの堤外側に矢板法線方向に互いに隣接して配置された複数の鋼製壁パネル２と各鋼製壁パネル2,2間に配置された複数の鋼製接続パネル３とを備え、各鋼製壁パネル2,2間は鋼製接続パネル３によって互いに接続され、かつ各鋼製壁パネル２および鋼製接続パネル３の下端部は鋼矢板基礎Ａに一体的に接合されている。 The steel wall B consists of a plurality of steel wall panels 2 arranged adjacent to each other in the sheet pile normal direction on the outer side of the steel sheet pile foundation A, and a plurality of steel wall panels 2 arranged between the steel wall panels 2, 2. The steel wall panels 2, 2 are connected to each other by the steel connection panels 3, and the lower ends of the steel wall panels 2 and the steel connection panels 3 are connected to the steel sheet pile foundation A. integrally joined.

鋼製壁パネル２は、鋼矢板基礎Ａの堤外側の各凹部4a内に建て付けられた複数の鋼製骨部材５と当該複数の鋼製骨部材5,5の堤外側に配置された鋼製面材６と鋼矢板基礎Ａの堤内側の各凹部4b内に建て付けられた複数の鋼製控え部材７とを備え、特に鋼製骨部材５と鋼製控え部材７は矢板法線方向に交互に配置されている。 The steel wall panel 2 consists of a plurality of steel frame members 5 erected in the respective recesses 4a on the bank side of the steel sheet pile foundation A and the steel frame members 5, 5 arranged on the bank side of the plurality of steel frame members 5, 5. It comprises a facing material 6 and a plurality of steel stay members 7 erected in each recess 4b inside the embankment of the steel sheet pile foundation A, in particular the steel frame members 5 and the steel stay members 7 are arranged in the normal direction of the sheet pile. are arranged alternately.

また、鋼製骨部材５は構築される鋼製壁Ｂの地盤面からの高さと同じ高さに形成され、鋼製控え部材７は鋼矢板基礎Ａの上端部分を超える高さに形成され、いずれもＨ形鋼などの形鋼より形成されている。 In addition, the steel frame member 5 is formed at the same height as the height of the steel wall B to be constructed from the ground surface, and the steel stay member 7 is formed at a height exceeding the upper end portion of the steel sheet pile foundation A, Both are made of shaped steel such as H-shaped steel.

また、鋼製控え部材７は、上端部において鋼製面材６の堤内側面に連結部材7aを介して溶接またはボルト接合され、また、鋼製面材６と各鋼製控え部材７間に下方に開口する開口部８が矢板法線方向と直交する方向に形成され、当該開口部８内に鋼矢板基礎Ａの上端部分が挿入されている。 In addition, the steel stay member 7 is welded or bolted to the bank inner side surface of the steel face member 6 at its upper end through a connecting member 7a. An opening 8 is formed in a direction orthogonal to the sheet pile normal direction, and the upper end portion of the steel sheet pile foundation A is inserted into the opening 8 .

鋼製面材６は鋼板などで形成され、各鋼製骨部材5,5間の全面を覆うように配置され、かつ各鋼製骨部材５の堤外側面に溶接またはボルト接合により取り付けられている。なお、鋼製面材６は複数の鋼製骨部材5,5間を覆う程の大型板に形成されていてもよく、また人力でも取り扱い可能な小型板に形成されていてもよい。 The steel face member 6 is formed of a steel plate or the like, is arranged so as to cover the entire surface between the steel frame members 5, 5, and is attached to the bank-side surface of each steel frame member 5 by welding or bolting. . The steel face member 6 may be formed in a large plate enough to cover between the plurality of steel frame members 5, 5, or may be formed in a small plate that can be handled manually.

接続パネル３は、隣接する各鋼製壁パネル2,2の鋼製面材6,6間に配置された鋼製面材９と当該鋼製面材９の堤内側面に配置された複数の鋼製補剛材10と鋼矢板基礎Ａの堤内側の凹部4b内に建て付けられた鋼製控え部材11とを備えている。 The connection panel 3 consists of a steel face member 9 arranged between the steel face members 6, 6 of the adjacent steel wall panels 2, 2 and a plurality of steel members arranged on the bank inner side surface of the steel face member 9. It is equipped with a steel stiffener 10 and a steel stay member 11 erected in the recess 4b inside the bank of the steel sheet pile foundation A.

鋼製面材９は鋼板などで形成され、隣接する壁パネル2,2間の全面を覆う程の大きさに形成されている。また、鋼製面材９の左右縁端部に嵌合溝9a,9aが鋼製面材９の上下方向に連続して形成され、当該嵌合溝9a,9aに壁パネル２を構成している端部鋼製骨部材５のフランジ5a,5aがそれぞれ嵌合され、これにより隣接する各鋼製壁パネル2,2間が鋼製接続パネル３を介して互いに接続されている。 The steel face member 9 is made of a steel plate or the like, and is formed in a size sufficient to cover the entire surface between the adjacent wall panels 2,2. Fitting grooves 9a, 9a are formed continuously in the vertical direction of the steel face member 9 at the left and right edge portions of the steel face member 9, and the wall panel 2 is formed in the fitting grooves 9a, 9a. The flanges 5a, 5a of the end steel ribs 5 are fitted, respectively, so that the adjacent steel wall panels 2, 2 are connected to each other via the steel connecting panels 3. As shown in FIG.

なお、嵌合溝9a,9aは、フランジ5aの嵌合長よりやや深めに形成されており、これにより左右鋼製壁パネル2,2と鋼製接続パネル３間の接続部における矢板法線方向の誤差を吸収できるようになっている。また、嵌合溝9aとフランジ5a間にゴム等からなる止水パッキン12が充填されていることで、この部分の止水性が図られている。 The fitting grooves 9a, 9a are formed slightly deeper than the fitting length of the flange 5a. error can be absorbed. Further, a water stop packing 12 made of rubber or the like is filled between the fitting groove 9a and the flange 5a, so that this portion is made water stop.

補剛材10は鋼製面材９の堤内側面に鋼製面材９の上下方向に等間隔にリブ状に配置され、かつ鋼製面材９の堤内側面に溶接またはボルト接合などによって取り付けられている。 The stiffeners 10 are arranged on the inner wall of the steel face plate 9 in the form of ribs at equal intervals in the vertical direction of the steel face plate 9, and are attached to the inner wall of the steel face plate 9 by welding or bolting. ing.

鋼製控え部材11はＨ形鋼などの形鋼より形成され、かつ上端部において鋼製面材９の堤内側面に連結鋼材9aを介し、溶接またはボルト接合によって接続されている。また、鋼製面材９と鋼製控え部材11間に開口部８が矢板法線方向と直交する方向に形成され、当該開口部８内に鋼矢板基礎Ａの上端部が挿入されている。 The steel stay member 11 is made of shaped steel such as H-shaped steel, and is connected at its upper end to the bank inner side surface of the steel face member 9 via a connecting steel member 9a by welding or bolting. An opening 8 is formed between the steel face member 9 and the steel stay member 11 in a direction orthogonal to the sheet pile normal direction, and the upper end of the steel sheet pile foundation A is inserted into the opening 8 .

このように配置された各鋼製壁パネル２および各鋼製接続パネル３の下端部における、鋼製控え部材７および11の堤内側に鋼製型枠13が配置され、かつ当該鋼製型枠13と各鋼製壁パネル２および鋼製接続パネル３の鋼製面材６および９間にコンクリート14が打設されている。 At the lower end of each steel wall panel 2 and each steel connection panel 3 thus arranged, a steel formwork 13 is arranged on the inner side of the bank of the steel stay members 7 and 11, and the steel formwork is Concrete 14 is placed between 13 and the steel facings 6 and 9 of each steel wall panel 2 and steel connection panel 3 .

鋼製型枠13は、各鋼製控え部材7,7間および鋼製控え部材７と11間に矢板法線方向に連続して設置され、かつ各鋼製控部え部材７および11に溶接またはボルト接合によって取り付けられている。コンクリート14は、鋼矢板基礎Ａの上端部分、各鋼製控え部材７および11、さらに開口部８が完全に埋設される高さまで打設されている。 The steel formwork 13 is installed continuously in the sheet pile normal direction between the steel stay members 7 and 7 and between the steel stay members 7 and 11, and is welded to the steel stay members 7 and 11. or attached by a bolted connection. Concrete 14 is cast to a height where the upper end portion of steel sheet pile foundation A, steel stay members 7 and 11, and opening 8 are completely buried.

以上の構成により、壁パネル２および接続パネル３の下端部は鋼矢板基礎Ａに一体的に接合されて鋼製壁Ｂが構築されている。 With the above configuration, the lower ends of the wall panel 2 and the connection panel 3 are integrally joined to the steel sheet pile foundation A to construct the steel wall B. As shown in FIG.

このような構成において、鋼矢板基礎Ａに対して堤外側の凹部4aに配置された鋼製骨部材５が堤外側から外力を受けたときに、鋼矢板基礎Ａによって仕切られた堤外側のコンクリート塊14aが鋼矢板基礎Ａから引き剥がされようとするが、鋼矢板基礎Ａの堤内側の凹部4bに配置された鋼製控え部材７で拘束されたコンクリート塊14bが鋼矢板基礎Ａを押し込むように作用することで、当該部コンクリート14から鋼製壁パネル２が脱落することなく一体として挙動させることが可能になる。 In such a configuration, when the steel frame member 5 arranged in the recess 4a on the outer side of the steel sheet pile foundation A receives an external force from the outer side of the bank, the concrete on the outer side of the bank partitioned by the steel sheet pile foundation A The mass 14a is about to be torn off from the steel sheet pile foundation A, but the concrete mass 14b restrained by the steel stay member 7 arranged in the recess 4b inside the bank of the steel sheet pile foundation A pushes the steel sheet pile foundation A. , the steel wall panel 2 does not fall off from the concrete 14 and can be made to behave as one.

一方、堤内側からの外力に対しては、鋼製骨部材５と鋼製控え部材７の関係を逆として同様の作用状態として挙動させることが可能となる。 On the other hand, with respect to the external force from the inner side of the bank, it is possible to reverse the relationship between the steel frame member 5 and the steel stay member 7 so that they behave in the same action state.

次に、構築工法を簡単に説明する。
(1)鋼矢板基礎Ａの施工が完了したら、鋼矢板基礎Ａの堤外側に複数の鋼製壁パネル２を矢板法線方向に互いに隣接させて配置する。その際、各鋼製壁パネル２の鋼製骨部材と鋼製控え部材を、それぞれ鋼矢板基礎Ａの堤外側の凹部4aと堤内側の凹部4b内にそれぞれ建て付け、かつ鋼矢板基礎Ａの上端部分を開口部８に挿入する。 Next, the construction method will be briefly explained.
(1) After the construction of the steel sheet pile foundation A is completed, a plurality of steel wall panels 2 are arranged adjacent to each other in the sheet pile normal direction on the embankment side of the steel sheet pile foundation A. At that time, the steel frame members and steel stay members of each steel wall panel 2 are erected in the recess 4a on the outer side of the bank of the steel sheet pile foundation A and the recessed section 4b on the inner side of the bank, respectively. Insert the upper end portion into the opening 8 .

なお、鋼製骨部材５と鋼製控え部材７は、鋼矢板基礎Ａからある程度離隔Ｓをもって配置することで(図５参照)、鋼矢板基礎Ａを構成する鋼矢板１の打設時の出入り誤差を吸収することが可能となり、鋼製壁パネル２の配置時の調整にかかる工数を大幅に削減することができる。 By arranging the steel frame members 5 and the steel stay members 7 with a certain distance S from the steel sheet pile foundation A (see FIG. 5), the steel sheet piles 1 constituting the steel sheet pile foundation A can be moved in and out during driving. Errors can be absorbed, and man-hours required for adjustment when arranging the steel wall panel 2 can be greatly reduced.

(2)次に、隣接する各鋼製壁パネル2,2間に鋼製接続パネル３を配置して、隣接する各鋼製壁パネル2,2間を接続する。その際、鋼製接続パネル３をクレーンで吊り、隣接する各鋼製壁パネル2,2間に配置し、かつ両端の嵌合溝9a,9aを両側鋼製壁パネル2,2を構成する鋼製骨部材5,5のフランジ5a,5aと嵌合させ、鋼製壁パネル2,2間に上方より落とし込むように配置する。 (2) Next, the steel connection panel 3 is placed between the adjacent steel wall panels 2,2 to connect the adjacent steel wall panels 2,2. At that time, the steel connection panel 3 is hung by a crane, arranged between the adjacent steel wall panels 2, 2, and the fitting grooves 9a, 9a at both ends are fitted to the steel wall panels 2, 2 on both sides. It is fitted with the flanges 5a, 5a of the frame members 5, 5 and arranged so as to be dropped from above between the steel wall panels 2, 2. - 特許庁

(3)次に、各鋼製壁パネル２および鋼製接続パネル３の鋼製控え部材7,7間および鋼製控え部材7,8に鋼製型枠13を配置する。そして、鋼製型枠13の内側にコンクリート14を打設する。なお、鋼製壁パネル２の鋼製控え部材7,7間に配置される鋼製型枠13は、鋼製壁パネル２の製作時に取り付けておいてもよい。 (3) Next, the steel forms 13 are placed between the steel stay members 7, 7 and between the steel stay members 7, 8 of the steel wall panels 2 and the steel connection panels 3, respectively. Then, concrete 14 is placed inside the steel formwork 13 . The steel formwork 13 placed between the steel stay members 7, 7 of the steel wall panel 2 may be attached when the steel wall panel 2 is manufactured.

図７と図８は、本発明の他の実施形態を図示したものであり、特に図１～図６で説明した鋼製壁パネル２に替えて図８に図示する鋼製壁パネル15が配置され、また、隣接する各鋼製壁パネル15,15間は鋼製接続パネル３に替えて鋼製接続部材16を配置し、各鋼製接続部材16,16間を複数の接合ボルト17によってボルト接合することにより直接接合されている。 FIGS. 7 and 8 illustrate another embodiment of the invention, in particular the steel wall panel 15 shown in FIG. 8 replaces the steel wall panel 2 described in FIGS. 1-6. In addition, a steel connection member 16 is arranged between the adjacent steel wall panels 15, 15 instead of the steel connection panel 3, and the steel connection members 16, 16 are bolted by a plurality of joint bolts 17. Directly joined by joining.

各鋼製壁パネル15は、矢板法線方向の両端部に配置された鋼製骨部材５に替えて鋼製接続部材16を備えている。また、鋼製接続部材16は溝形鋼より形成され、かつウェブ16aが外向きに配置されている。 Each steel wall panel 15 is provided with steel connecting members 16 in place of the steel rib members 5 arranged at both ends in the direction normal to the sheet pile. The steel connecting member 16 is also formed from channel steel and has a web 16a facing outward.

そして、隣接する各壁パネル15,15間は、鋼製接続部材16,16のウェブ16a,16aを複数の接合ボルト17によってボルト接合することにより接続されている(図8(b)参照)。 Adjacent wall panels 15, 15 are connected by bolting webs 16a, 16a of steel connecting members 16, 16 with a plurality of connecting bolts 17 (see FIG. 8(b)).

また、必要に応じて、接合ボルト17のボルト頭部および接合ナット等の腐食防止を図るべく、鋼製接続部材16,16の凹部内にモルタルまたはコンクリート18を充填することにより、接合ボルト18の露出部分をモルタルまたはコンクリート18で被覆することもある(図9(b)参照)。 In addition, if necessary, in order to prevent corrosion of the bolt head of the joint bolt 17 and the joint nut, etc., the concave portions of the steel connection members 16, 16 are filled with mortar or concrete 18, thereby preventing the joint bolt 18 from corroding. The exposed portion may be covered with mortar or concrete 18 (see Figure 9(b)).

その他の構成は図１～６で説明した実施形態とほぼ同じである。 Other configurations are substantially the same as those of the embodiment described with reference to FIGS.

本発明は、堤防や防波堤、或は防潮堤などの海岸・河岸保全施設、さらには陸上の擁壁構造物などの特に壁部(上部工)の構築に適し、短期施工および経済施工等を図ることができる。 The present invention is suitable for the construction of coastal and riverbank protection facilities such as levees, breakwaters, and seawalls, as well as especially walls (superstructures) such as retaining wall structures on land, and aims for short-term construction and economical construction. be able to.

Ａ 鋼矢板基礎
Ｂ 鋼製壁
Ｓ 離隔
１ 鋼矢板
２ 鋼製壁パネル
３ 鋼製接続パネル
4a 堤外側の凹部
4b 堤内側の凹部
５ 鋼製骨部材
６ 鋼製面材
７ 鋼製控え部材
８ 開口部
９ 鋼製面材
9a 嵌合溝
10 補剛材
11 鋼製控え部材
12 止水パッキン
13 鋼製型枠
14 コンクリート
14a 堤外側のコンクリート塊
14b 堤内側のコンクリート塊
15 鋼製壁パネル
16 鋼製接続部材
16a 鋼製接続部材のウェブ
17 接合ボルト
18 モルタル又はコンクリート A Steel sheet pile foundation B Steel wall S Separation 1 Steel sheet pile 2 Steel wall panel 3 Steel connection panel
4a Recess outside bank
4b Inner recess 5 Steel frame member 6 Steel face member 7 Steel stay member 8 Opening 9 Steel face member
9a Fitting groove
10 Stiffener
11 Steel stay member
12 Waterproof packing
13 Steel formwork
14 Concrete
14a Concrete blocks outside the embankment
14b Concrete block inside embankment
15 steel wall panel
16 Steel connecting member
16a web of steel connecting members
17 Joining bolt
18 Mortar or Concrete

Claims (5)

地盤内に、連続して複数配置される鋼矢板によって、前記鋼矢板の設置される向きに対して垂直方向に凹凸が交互に位置するように構築される鋼矢板基礎を備えてなる鋼製壁であって、前記鋼矢板基礎の堤外側に前記鋼矢板の設置方向と平行に、互いに隣接して配置された複数の鋼製壁パネルを備え、前記鋼製壁パネルは前記鋼矢板基礎の堤外側および堤内側の凹部にそれぞれ配置された複数の鋼製骨部材および鋼製控え部材と、前記鋼製骨部材の堤外側に配置された鋼製面材とを備え、前記鋼製骨部材と前記鋼製控え部材は、前記鋼矢板基礎の堤外側および堤内側の凹部に前記鋼矢板基礎の前記鋼矢板の連続する方向に交互に配置され、かつ前記鋼矢板基礎の堤外側および堤内側の凹部にコンクリートが打設されてなることを特徴とする鋼製壁。 A steel wall comprising a steel sheet pile foundation constructed by a plurality of steel sheet piles arranged in succession in the ground so that unevenness is alternately located in the direction perpendicular to the direction in which the steel sheet piles are installed . wherein a plurality of steel wall panels are arranged adjacent to each other in parallel with the installation direction of the steel sheet piles on the bank outer side of the steel sheet pile foundation, wherein the steel wall panels are located on the bank of the steel sheet pile foundation. a plurality of steel rib members and steel stay members arranged respectively in recesses on the outer side and the inner side of the bank; The steel stay members are alternately arranged in recesses on the bank outer side and the bank inner side of the steel sheet pile foundation in the continuous direction of the steel sheet piles of the steel sheet pile foundation, and on the bank outer side and the bank inner side of the steel sheet pile foundation. A steel wall characterized in that concrete is placed in a recess. 請求項１記載の鋼製壁において、前記鋼製パネル間は鋼製接続パネルによって接続されていることを特徴とする鋼製壁。 2. A steel wall according to claim 1, wherein said steel panels are connected by steel connecting panels. 請求項１記載の鋼製壁において、前記鋼製壁パネル間はボルト接合によって接続されていることを特徴とする鋼製壁。 2. A steel wall according to claim 1, wherein said steel wall panels are connected by bolted joints. 請求項１～３のいずれかひとつに記載の鋼製壁において、前記鋼製控え部材の堤内側に鋼製型枠が配置されていることを特徴とする鋼製壁。 A steel wall according to any one of claims 1 to 3, characterized in that a steel formwork is arranged on the inner side of the bank of said steel stay member. 地盤内に、連続して複数配置される鋼矢板によって、前記鋼矢板の設置される向きに対して垂直方向に凹凸が交互に位置するように構築される鋼矢板基礎の堤外側に、複数の鋼製骨部材および鋼製控え部材と鋼製面材とを備えてなる複数の鋼製壁パネルを配置することにより構築される鋼製壁の構築工法であって、以下の工程からなることを特徴とする鋼製壁の構築工法。
(1)前記鋼矢板基礎の堤外側に前記複数の鋼製壁パネルを前記鋼矢板の設置方向と平行に互いに隣接させて配置すると共に、前記鋼製骨部材と前記鋼製控え部材を前記鋼矢板基礎の堤外側および堤内側の凹部にそれぞれ配置する工程。
(2)隣接する各鋼製壁パネル間を接合する工程。
(3)前記鋼矢板基礎の堤外側および堤内側の凹部にコンクリートを打設する工程。
 A plurality of steel sheet piles are continuously arranged in the ground so that unevenness is alternately located in the direction perpendicular to the installation direction of the steel sheet piles. A steel wall construction method constructed by arranging a plurality of steel wall panels comprising steel frame members, steel stay members, and steel facing members, comprising the following steps: Characteristic steel wall construction method.
(1) The plurality of steel wall panels are arranged adjacent to each other in parallel to the installation direction of the steel sheet piles on the bank side of the steel sheet pile foundation, and the steel frame members and the steel stay members are arranged in the steel The process of arranging in the recesses on the outside and inside of the bank of the sheet pile foundation.
(2) Joining between adjacent steel wall panels.
(3) A step of pouring concrete into recesses on the outer side and inner side of the bank of the steel sheet pile foundation.
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Citations (5)

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Publication number Priority date Publication date Assignee Title
JP2000240075A (en) 1998-12-22 2000-09-05 Daiwa-Cres Co Ltd Penetration type retaining wall
JP2002167683A (en) 2000-11-28 2002-06-11 Sumikou Boshoku Kk Electrolytic corrosion protection device and electrolytic corrosion protection method
WO2011110271A1 (en) 2010-02-12 2011-09-15 Algemene Aannemingen Van Laere Nv Method for the construction of a concrete capping beam made from capping - beam segments and a shell structure therefor
JP2012047041A (en) 2011-12-06 2012-03-08 Nippon Steel Corp Steel sheet pile and steel sheet pile foundation structure
JP2017089144A (en) 2015-11-05 2017-05-25 株式会社琉球技研 Revetment structure by steel sheet pile

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5141392Y2 (en) * 1971-11-13 1976-10-08
JP3252251B2 (en) * 1996-01-31 2002-02-04 興建産業株式会社 Construction method of L-shaped retaining wall

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Publication number Priority date Publication date Assignee Title
JP2000240075A (en) 1998-12-22 2000-09-05 Daiwa-Cres Co Ltd Penetration type retaining wall
JP2002167683A (en) 2000-11-28 2002-06-11 Sumikou Boshoku Kk Electrolytic corrosion protection device and electrolytic corrosion protection method
WO2011110271A1 (en) 2010-02-12 2011-09-15 Algemene Aannemingen Van Laere Nv Method for the construction of a concrete capping beam made from capping - beam segments and a shell structure therefor
JP2012047041A (en) 2011-12-06 2012-03-08 Nippon Steel Corp Steel sheet pile and steel sheet pile foundation structure
JP2017089144A (en) 2015-11-05 2017-05-25 株式会社琉球技研 Revetment structure by steel sheet pile

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