JP7536592B2 - Earth retaining structure - Google Patents
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Description
本発明は、地盤の開削工事に際し、開削側（開削予定領域）と地山側（非開削領域）とを仕切って、施工場所に対する土留め（及び止水）を行う、土留め構造に関する。 The present invention relates to a retaining structure that separates the excavation side (area to be excavated) from the natural ground side (non-excavation area) during ground excavation work, and retains soil (and stops water) at the construction site.
通常、開削工事で用いる土留め（山留め）は、鋼矢板又はＨ形鋼を打設して、土留め壁を構成し、土留め壁の剛性・耐力で、土圧・水圧に耐えて、開削場所の安全を確保する。 Typically, the retaining walls used in cut-and-cover construction are made by casting steel sheet piles or H-shaped steel beams, and the rigidity and strength of the retaining walls allow them to withstand earth and water pressure, ensuring the safety of the excavation site.
また、特許文献１には、二重土留め壁が提案されている。
特許文献１に記載の二重土留め壁は、鋼矢板を２列に打設し、頭部どうしを頭部連結材により剛結して、ラーメン構造とすることにより、列間の地盤を拘束し、剛性アップ（自立性向上）を図っている。
Furthermore, Patent Document 1 proposes a double retaining wall.
The double retaining wall described in Patent Document 1 has steel sheet piles driven into two rows, with the heads rigidly connected by head connecting materials to form a rigid frame structure, which restrains the ground between the rows and increases rigidity (improves self-supporting properties).
ところで、土留め壁として、鋼矢板を用いる場合は、安価に構築できる反面、十分な強度が得られないことがある。
また、土留め壁として、Ｈ形鋼を用いる場合は、十分な強度が得られる反面、高コストとなる。
When steel sheet piles are used as retaining walls, they can be constructed inexpensively, but they may not have sufficient strength.
Furthermore, when H-shaped steel is used as the retaining wall, although sufficient strength can be obtained, the cost is high.
本発明は、このような実状に鑑み、鋼矢板とＨ形鋼とを上手に併用することで、強度とコストとの両立を図った土留め構造を提供することを課題とする。 In light of these circumstances, the present invention aims to provide a retaining structure that achieves both strength and cost by skillfully combining steel sheet piles and H-shaped steel beams.
上記の課題を解決するために、本発明に係る土留め構造（二重土留め壁）の第１態様及び第２態様は、
地盤に開削側と地山側とを仕切るように打ち込まれる第１の鋼矢板の列と、
前記第１の鋼矢板の列より地山側の地盤に、前記第１の鋼矢板の列に対し間隔をあけて打ち込まれる第２の鋼矢板の列と、
前記第１及び第２の鋼矢板の列中に介在するように地盤に打ち込まれ、ウェブの厚さが、前記第１の鋼矢板の厚さよりも厚く、かつ、前記第２の鋼矢板の厚さよりも厚いＨ形鋼と、
を含んで構成され、
上面視で、前記第１の鋼矢板の列の波形と前記第２の鋼矢板の列の波形とが同位相となるように、前記第１の鋼矢板の列と前記第２の鋼矢板の列とが並列に配置され、
前記Ｈ形鋼は、２つのフランジのそれぞれの両端縁に、前記鋼矢板の両端縁のジョイントと連結可能なジョイントを有し、
一方のフランジが、前記第１の鋼矢板の列中に介在して、両隣りの鋼矢板と互いのジョイントどうしで連結され、
他方のフランジが、前記第２の鋼矢板の列中に介在して、両隣りの鋼矢板と互いのジョイントどうしで連結される。
In order to solve the above problems, the first and second aspects of the earth retaining structure (double earth retaining wall) according to the present invention are as follows:
A first row of steel sheet piles is driven into the ground so as to separate the excavation side from the natural ground side;
A row of second steel sheet piles is driven into the ground on the natural ground side of the first row of steel sheet piles at intervals from the first row of steel sheet piles;
an H-shaped steel that is driven into the ground so as to be interposed between the rows of the first and second steel sheet piles , and a thickness of a web is thicker than a thickness of the first steel sheet pile and thicker than a thickness of the second steel sheet pile ;
The present invention relates to a method for manufacturing a computer-implemented ...
The first steel sheet pile row and the second steel sheet pile row are arranged in parallel so that the waveforms of the first steel sheet pile row and the waveforms of the second steel sheet pile row are in phase when viewed from above,
The H-shaped steel has joints at both end edges of each of the two flanges that can be connected to joints at both end edges of the steel sheet pile,
One flange is interposed in the row of the first steel sheet pile and is connected to adjacent steel sheet piles at their joints,
The other flange is interposed between the second row of steel sheet piles and is connected to adjacent steel sheet piles at their joints.
本発明に係る土留め構造の第１態様では、第１の鋼矢板の列と第２の鋼矢板の列との間の地盤に固化材が注入される。In the first aspect of the retaining structure according to the present invention, a solidification material is injected into the ground between the first row of steel sheet piles and the second row of steel sheet piles.
本発明に係る土留め構造の第２態様では、第１の鋼矢板の列と第２の鋼矢板の列との間の地下水位が低下させられる。In the second aspect of the earth retaining structure according to the present invention, the groundwater level between the first row of steel sheet piles and the second row of steel sheet piles is lowered.
本発明によれば、ジョイント付きのＨ形鋼を用いて、鋼矢板の列中にＨ形鋼を介在させることにより、強度とコストとの両立を図ることができる。 According to the present invention, by using H-shaped steel with joints and placing H-shaped steel between rows of steel sheet piles, it is possible to achieve both strength and cost.
特に二重土留め壁の場合は、Ｈ形鋼が第１及び第２の鋼矢板の列を剛結し、第１及び第２の鋼矢板の列の一体化効果、及び、これらの列間の地盤拘束効果を高め、二重土留め壁の更なる剛性・強度アップを図ることができる。 In particular, in the case of a double retaining wall, the H-shaped steel rigidly connects the first and second rows of steel sheet piles, enhancing the integration effect of the first and second rows of steel sheet piles and the ground restraint effect between these rows, thereby further increasing the rigidity and strength of the double retaining wall.
以下、本発明の実施の形態について、詳細に説明する。
図１は本発明の第１実施形態として土留め壁を用いた立坑などの開削工事の施工例を示す図である。また、図２は図１のII－II矢視に相当する土留め壁の拡大平面図である。
Hereinafter, an embodiment of the present invention will be described in detail.
Fig. 1 is a diagram showing an example of excavation work for a shaft using an earth retaining wall according to a first embodiment of the present invention. Fig. 2 is an enlarged plan view of the earth retaining wall taken along the line II-II in Fig. 1.
本実施形態の土留め構造体１０は、地盤（開削前の地盤）Ｇに、開削側と地山側とを仕切るように、壁部材を１列に打設すること（壁部材を１単位ずつ打設し、これらを１列につなげること）により構築される土留め壁であり、打設用の壁部材として、鋼矢板（シートパイル）１と、Ｈ形鋼（ジョイント付きＨ形鋼）２とを併用する。言い換えれば、鋼矢板１とＨ形鋼２とを混在させて、打設することにより、土留め壁を構築する。 The retaining structure 10 of this embodiment is an earth retaining wall constructed by casting wall members in a row (casting the wall members one by one and connecting them in a row) into the ground (ground before excavation) G so as to separate the excavation side from the natural ground side, and uses a combination of steel sheet piles (sheet piles) 1 and H-shaped steel (H-shaped steel with joints) 2 as wall members for casting. In other words, the retaining wall is constructed by casting a mixture of steel sheet piles 1 and H-shaped steel 2.
鋼矢板１は、図２に示されるように、断面が台形形状に屈曲し、表裏の一方の面が凸面、他方の面が凹面をなし、両端縁にジョイント（継ぎ手）１ｊを有している。従って、鋼矢板１を表と裏を逆にして互い違いに列設し、隣り合う鋼矢板１、１をジョイント１ｊ、１ｊどうしでつなげることで、鋼矢板１の列により土留め壁（壁体）を構築できる。 As shown in Figure 2, the steel sheet pile 1 has a trapezoidal cross section, with one of the front and back faces being convex and the other being concave, and has joints 1j at both ends. Therefore, by installing the steel sheet piles 1 in a staggered row with the front and back reversed and connecting adjacent steel sheet piles 1, 1 with the joints 1j, 1j, a retaining wall (wall body) can be constructed using the row of steel sheet piles 1.
Ｈ形鋼２は、図２に示されるように、一対の平行なフランジ２ｆ１、２ｆ２と、両フランジの中間部をつなぐウェブ２ｗとを有する。 As shown in FIG. 2, the H-shaped steel 2 has a pair of parallel flanges 2f1, 2f2 and a web 2w connecting the middle parts of both flanges.
また、ここで用いるＨ形鋼２は、ジョイント付きである。すなわち、一対のフランジのうち一方のフランジ２ｆ１の両端縁に、鋼矢板１の両端縁のジョイント１ｊと連結可能なジョイント２ｊを有している。なお、ジョイント２ｊ付きのＨ形鋼２は、鋼矢板１のジョイント１ｊ部分を切り取って、Ｈ形鋼２の一方のフランジ２ｆ１の両端縁に溶接等で取付けることにより、製作できる。 The H-shaped steel 2 used here has joints. That is, both end edges of one of the pair of flanges, 2f1, have joints 2j that can be connected to the joints 1j at both end edges of the steel sheet pile 1. The H-shaped steel 2 with joints 2j can be manufactured by cutting out the joint 1j portion of the steel sheet pile 1 and attaching it to both end edges of one of the flanges, 2f1, of the H-shaped steel 2 by welding or the like.
ここにおいて、図２の実施形態では、地盤Ｇに開削側と地山側とを仕切るように、鋼矢板１を１列に打ち込み、また、かかる鋼矢板１の列中に一定の比率で介在するようにＨ形鋼２を打ち込む。 Here, in the embodiment shown in Figure 2, steel sheet piles 1 are driven into the ground G in a row to separate the excavation side from the natural ground side, and H-shaped steel 2 is driven into the row of steel sheet piles 1 so that they are spaced at a certain ratio.
特に図２の実施形態では、鋼矢板１とＨ形鋼２との比は、例えば、３：１として、３枚の鋼矢板１をジョイント１ｊどうしでつなげながら連続的に打設した後、３枚目の鋼矢板１に続けて、ジョイント１ｊと２ｊとでつなげてＨ形鋼２を打設している。 In particular, in the embodiment of FIG. 2, the ratio of steel sheet piles 1 to H-shaped steel 2 is, for example, 3:1, and three steel sheet piles 1 are cast in succession while connected to each other by joints 1j, and then the H-shaped steel 2 is cast following the third steel sheet pile 1, connecting it with joints 1j and 2j.
このように鋼矢板１の列中にＨ形鋼２を混在させる方式とすることにより、鋼矢板１のみからなる土留め壁に対し、強度アップを図り、自立性能を向上させることができる。また、Ｈ形鋼２のみからなる土留め壁に対しては、コストダウンを図ることができる。従って、併用することで、強度アップとコストダウンとの両立を図ることができる。 By mixing H-shaped steel 2 in the rows of steel sheet piles 1 in this way, it is possible to increase the strength and improve the self-supporting performance of a retaining wall made only of steel sheet piles 1. It is also possible to reduce the cost of a retaining wall made only of H-shaped steel 2. Therefore, by using them together, it is possible to achieve both increased strength and reduced costs.
鋼矢板１とＨ形鋼２の比率は、図２の例に限るものではなく、強度アップ及びコストダウンの要求に基づいて定めればよい。また、その比率は一定でなくてもよく、地盤の制約などから、より十分な強度が求められる箇所において、Ｈ形鋼２の比率を増やすなどしてもよい。 The ratio of steel sheet piles 1 to H-shaped steel 2 is not limited to the example in Figure 2, but may be determined based on the requirements for increased strength and reduced costs. Furthermore, the ratio does not have to be constant, and the ratio of H-shaped steel 2 may be increased in areas where sufficient strength is required due to ground constraints, etc.
次に本発明の第２実施形態について説明する。
図３は本発明の第２実施形態として二重土留め壁を用いた立坑などの開削工事の施工例を示す図である。また、図４は図３のIV－IV矢視に相当する二重土留め壁の拡大平面図である。
Next, a second embodiment of the present invention will be described.
Fig. 3 is a diagram showing an example of excavation work for a shaft using a double retaining wall as a second embodiment of the present invention. Fig. 4 is an enlarged plan view of the double retaining wall taken along the line IV-IV in Fig. 3.
本実施形態の土留め構造体２０は、第１の壁体２１と第２の壁体２２との二重構造（二重土留め壁）である。 The retaining structure 20 of this embodiment has a double structure (double retaining wall) consisting of a first wall 21 and a second wall 22.
第１の壁体２１は、地盤（開削前の地盤）Ｇに、開削側と地山側とを仕切るように、壁部材を１列に打設すること（壁部材を１単位ずつ打設し、これらを１列につなげること）により構築される。 The first wall 21 is constructed by pouring wall members in a row into the ground (ground before excavation) G (by pouring the wall members one unit at a time and connecting them in a row) so as to separate the excavation side from the natural ground side.
第２の壁体２２は、第１の壁体２１より地山側の地盤に、第１の壁体２１に対し、１ｍ程度の間隔（詳しくはＨ形鋼２のウェブ２ｗの長さに対応する間隔）をあけて、壁部材を１列に打設すること（壁部材を１単位ずつ打設し、これらを１列につなげること）により構築される。 The second wall body 22 is constructed by casting wall members in a row (casting the wall members one unit at a time and connecting them in a row) at intervals of about 1 m (specifically, an interval corresponding to the length of the web 2w of the H-shaped steel 2) relative to the first wall body 21 in the ground on the natural ground side of the first wall body 21.
第１及び第２の壁体２１、２２のいずれについても、打設用の壁部材として、鋼矢板（シートパイル）１と、Ｈ形鋼（ジョイント付きＨ形鋼）２とを併用する。言い換えれば、鋼矢板１とＨ形鋼２とを混在させて、打設することにより、二重土留め壁を構築する。 For both the first and second wall bodies 21, 22, a steel sheet pile (sheet pile) 1 and an H-shaped steel (H-shaped steel with joints) 2 are used together as wall components for casting. In other words, a double retaining wall is constructed by casting a mixture of steel sheet piles 1 and H-shaped steel 2.
鋼矢板１は、図４に示されるように、断面が台形形状に屈曲し、表裏の一方の面が凸面、他方の面が凹面をなし、両端縁にジョイント（継ぎ手）１ｊを有している。従って、鋼矢板１を表と裏を逆にして互い違いに列設し、隣り合う鋼矢板１、１をジョイント１ｊ、１ｊどうしでつなげることで、鋼矢板１の列により土留め壁（壁体）を構築できる。 As shown in Figure 4, the steel sheet pile 1 has a trapezoidal cross section, with one of the front and back faces being convex and the other being concave, and has joints 1j at both ends. Therefore, by reversing the front and back of the steel sheet piles 1 and staggering them in a row, and connecting adjacent steel sheet piles 1, 1 with joints 1j, 1j, a retaining wall (wall body) can be constructed using the row of steel sheet piles 1.
Ｈ形鋼２は、図４に示されるように、一対の平行なフランジ２ｆ１、２ｆ２と、両フランジの中間部をつなぐウェブ２ｗとを有する。 As shown in FIG. 4, the H-shaped steel 2 has a pair of parallel flanges 2f1, 2f2 and a web 2w connecting the middle parts of both flanges.
また、ここで用いるＨ形鋼２は、ジョイント付きである。すなわち、一対のフランジ２ｆ１、２ｆ２の両端縁に、鋼矢板１の両端縁のジョイント１ｊと連結可能なジョイント２ｊを有している。なお、ジョイント２ｊ付きのＨ形鋼２は、鋼矢板１のジョイント１ｊ部分を切り取って、Ｈ形鋼２の一対のフランジ２ｆ１、２ｆ２の両端縁に溶接等で取付けることにより、製作できる。 The H-shaped steel 2 used here has joints. That is, both ends of the pair of flanges 2f1, 2f2 have joints 2j that can be connected to the joints 1j at both ends of the steel sheet pile 1. The H-shaped steel 2 with joints 2j can be manufactured by cutting out the joint 1j portion of the steel sheet pile 1 and attaching it to both ends of the pair of flanges 2f1, 2f2 of the H-shaped steel 2 by welding or the like.
ここにおいて、図４の実施形態では、第１の壁体２１として、鋼矢板１を１列に打ち込み、第１の壁体（第１の鋼矢板の列）２１に対し、１ｍ程度の間隔（詳しくはＨ形鋼２のウェブ２ｗの長さに対応する間隔）をあけて、第２の壁体２２として、鋼矢板１を１列に打ち込む。そして、第１の壁体（第１の鋼矢板の列）中に一定の比率でＨ形鋼２の一方のフランジ２ｆ１を介在させ、第２の壁体（第２の鋼矢板の列）中に一定の比率でＨ形鋼２の他方のフランジ２ｆ２を介在させるように、Ｈ形鋼２を打ち込む。なお、鋼矢板１及びＨ形鋼２の打設は、バイブロハンマー又は圧入機（パイラー）を用いて行う。 Here, in the embodiment of FIG. 4, steel sheet piles 1 are driven in a row as the first wall body 21, and steel sheet piles 1 are driven in a row as the second wall body 22 at intervals of about 1 m (specifically, intervals corresponding to the length of the web 2w of the H-shaped steel 2) from the first wall body (first row of steel sheet piles) 21. Then, the H-shaped steel 2 is driven so that one flange 2f1 of the H-shaped steel 2 is interposed at a certain ratio in the first wall body (first row of steel sheet piles), and the other flange 2f2 of the H-shaped steel 2 is interposed at a certain ratio in the second wall body (second row of steel sheet piles). The steel sheet piles 1 and the H-shaped steel 2 are driven using a vibro hammer or a press-in machine (piler).
特に図４の実施形態では、各列での鋼矢板１とＨ形鋼（フランジ２ｆ１又は２ｆ２）との比は、例えば、３：１として、各列に３枚の鋼矢板１をジョイント１ｊどうしでつなげながら連続的に打設した後、各３枚目の鋼矢板１に続けて、ジョイント１ｊと２ｊとでつなげて１つのＨ形鋼２を打設している。 In particular, in the embodiment of FIG. 4, the ratio of steel sheet piles 1 to H-shaped steel (flanges 2f1 or 2f2) in each row is, for example, 3:1, and three steel sheet piles 1 are continuously cast in each row while connected by joints 1j, and then one H-shaped steel 2 is cast following each third steel sheet pile 1, connected by joints 1j and 2j.
上記のようにして構築された土留め構造体（二重土留め壁）２０によれば、第１の壁体（第１の鋼矢板の列）２１と第２の壁体（第２の鋼矢板の列）２２とがＨ形鋼２（特にそのウェブ２ｗ）により剛結して、一体構造をなしている。従って、第１及び第２の壁体２１、２２の一体化により、第１及び第２の壁体２１、２２による二重土留め壁の剛性・強度アップを図ることができる。 According to the earth retaining structure (double earth retaining wall) 20 constructed as described above, the first wall body (first row of steel sheet piles) 21 and the second wall body (second row of steel sheet piles) 22 are rigidly connected by the H-shaped steel 2 (particularly its web 2w) to form an integral structure. Therefore, by integrating the first and second wall bodies 21, 22, it is possible to increase the rigidity and strength of the double earth retaining wall formed by the first and second wall bodies 21, 22.
また、第１及び第２の壁体１１、１２が互いに拘束されることで、第１及び第２の壁体１１、１２間の地盤を拘束することができる。これにより、内部の地盤の剛性が二重土留め壁の剛性アップに大きく寄与する。特に砂地盤の場合、大きな剪断抵抗を持つので、より大きな剛性アップが得られる。従って、１つの土留め壁の剛性×２以上の剛性を発揮させることができる。 In addition, by restraining the first and second wall bodies 11, 12 against each other, the ground between the first and second wall bodies 11, 12 can be restrained. This allows the rigidity of the internal ground to contribute greatly to increasing the rigidity of the double retaining wall. In particular, sandy ground has a large shear resistance, so a greater increase in rigidity can be achieved. Therefore, it is possible to achieve rigidity that is more than twice the rigidity of a single retaining wall.
しかも、第１及び第２の壁体２１、２２が深さ方向の全域でＨ形鋼２（特にそのウェブ２ｗ）により連結されるので、第１及び第２の壁体２１、２２の一体化効果、及び、第１及び第２の壁体２１、２２間の地盤拘束効果を更に高め、二重土留め壁の更なる剛性・強度アップを図ることができる。 In addition, the first and second wall bodies 21, 22 are connected by the H-shaped steel 2 (particularly the web 2w) throughout the entire depth direction, which further enhances the integration effect of the first and second wall bodies 21, 22 and the ground restraint effect between the first and second wall bodies 21, 22, thereby further increasing the rigidity and strength of the double retaining wall.
ここでの第１及び第２の壁体２１、２２間の地盤による剛性アップ効果を更に高めるため、第１及び第２の壁体２１、２２間の地盤を補強するようにしてもよい。例えば、第１及び第２の壁体２１、２２間の地盤に固化材（薬液）を注入したり、ウェルポイント工法により、第１及び第２の壁体２１、２２間の地下水位を低下させたりしてもよい。 To further increase the effect of increasing the rigidity of the ground between the first and second walls 21, 22, the ground between the first and second walls 21, 22 may be reinforced. For example, a solidification material (chemical solution) may be injected into the ground between the first and second walls 21, 22, or the groundwater level between the first and second walls 21, 22 may be lowered by using a well point method.
また、上記のように鋼矢板１の列中にＨ形鋼２を混在させる方式とすることにより、鋼矢板１のみからなる二重土留め壁に対し、強度アップを図り、自立性能を向上させることができる。また、Ｈ形鋼２のみからなる二重土留め壁に対しては、コストダウンを図ることができる。従って、併用することで、強度アップとコストダウンとの両立を図ることができる。 In addition, by mixing H-shaped steel 2 in the row of steel sheet piles 1 as described above, it is possible to increase the strength and improve the self-supporting performance compared to a double retaining wall consisting only of steel sheet piles 1. In addition, it is possible to reduce the cost compared to a double retaining wall consisting only of H-shaped steel 2. Therefore, by using them together, it is possible to achieve both increased strength and reduced costs.
鋼矢板１とＨ形鋼２の比率は、図４の例に限るものではなく、強度アップ及びコストダウンの要求に基づいて定めればよい。また、その比率は一定でなくてもよく、地盤の制約などから、より十分な強度が求められる箇所において、Ｈ形鋼２の比率を増やすなどしてもよい。 The ratio of steel sheet piles 1 to H-shaped steel 2 is not limited to the example in Figure 4, but may be determined based on the requirements for increased strength and reduced costs. Furthermore, the ratio does not have to be constant, and the ratio of H-shaped steel 2 may be increased in areas where sufficient strength is required due to ground constraints, etc.
また、図４の例では、鋼矢板１からなる第１及び第２の壁体２１、２２は、凸形状が同じ方向となる同位相に配置していて、第１及び第２の壁体２１、２２の間隔は壁体の延在方向のどこでも同じであるが、これに限るものではない、すなわち、鋼矢板１からなる第１及び第２の壁体２１、２２を、凸形状が反対方向となる逆位相に配置して、第１及び第２の壁体２１、２２の間隔が周期的に変化するような配置としてもよい。 In the example of FIG. 4, the first and second wall bodies 21, 22 made of steel sheet piles 1 are arranged in the same phase with the convex shapes in the same direction, and the distance between the first and second wall bodies 21, 22 is the same everywhere in the extension direction of the wall bodies, but this is not limited to this. In other words, the first and second wall bodies 21, 22 made of steel sheet piles 1 may be arranged in antiphase with the convex shapes in opposite directions, and the distance between the first and second wall bodies 21, 22 may be arranged so that it changes periodically.
なお、図示の実施形態はあくまで本発明を概略的に例示するものであり、本発明は、説明した実施形態により直接的に示されるものに加え、特許請求の範囲内で当業者によりなされる各種の改良・変更を包含するものであることは言うまでもない。 It goes without saying that the illustrated embodiments are merely schematic illustrations of the present invention, and that the present invention includes not only what is directly shown in the described embodiments, but also various improvements and modifications made by those skilled in the art within the scope of the claims.
また、Ｈ形鋼のうち、ウェブが長く、フランジが短いものを「Ｉ形鋼」と呼ぶ。このＩ形鋼も２つのフランジとこれらの中間部をつなぐウェブとからなる点でＨ形鋼と同じであり、本発明でいう「Ｈ形鋼」に当然に含まれる。
なお、出願当初の請求項は以下の通りであった。
［請求項１］
地盤に開削側と地山側とを仕切るように１列に打ち込まれる鋼矢板と、
前記鋼矢板の列中に介在するように地盤に打ち込まれるＨ形鋼と、
を含んで構成され、
前記Ｈ形鋼は、一方のフランジの両端縁に、前記鋼矢板の両端縁のジョイントと連結可能なジョイントを有し、
前記一方のフランジが、前記鋼矢板の列中に介在して、両隣りの鋼矢板と互いのジョイントどうしで連結されることを特徴とする、土留め構造。
［請求項２］
地盤に開削側と地山側とを仕切るように打ち込まれる第１の鋼矢板の列と、
前記第１の鋼矢板の列より地山側の地盤に、前記第１の鋼矢板の列に対し間隔をあけて打ち込まれる第２の鋼矢板の列と、
前記第１及び第２の鋼矢板の列中に介在するように地盤に打ち込まれるＨ形鋼と、
を含んで構成され、
前記Ｈ形鋼は、２つのフランジのそれぞれの両端縁に、前記鋼矢板の両端縁のジョイントと連結可能なジョイントを有し、
一方のフランジが、前記第１の鋼矢板の列中に介在して、両隣りの鋼矢板と互いのジョイントどうしで連結され、
他方のフランジが、前記第２の鋼矢板の列中に介在して、両隣りの鋼矢板と互いのジョイントどうしで連結されることを特徴とする、土留め構造。
［請求項３］
前記Ｈ形鋼のジョイントは、前記Ｈ形鋼のフランジの両端縁に、当該両端縁から延長される形で、溶接により取付けられていることを特徴とする、請求項１又は請求項２記載の土留め構造。
Among H-shaped steel beams, those with long webs and short flanges are called "I-shaped steel beams." I-shaped steel beams are the same as H-shaped steel beams in that they consist of two flanges and a web connecting the middle parts of them, and are naturally included in the "H-shaped steel" referred to in this invention.
The claims as originally filed were as follows:
[Claim 1]
Steel sheet piles are driven into the ground in a row to separate the open-cut side from the natural ground side,
An H-shaped steel is driven into the ground so as to be interposed between the rows of steel sheet piles;
The present invention relates to a method for manufacturing a computer-implemented ...
The H-shaped steel has joints at both end edges of one flange that can be connected to joints at both end edges of the steel sheet pile,
An earth retaining structure, characterized in that one of the flanges is interposed between the rows of the steel sheet piles and is connected to adjacent steel sheet piles at their joints.
[Claim 2]
A first row of steel sheet piles is driven into the ground so as to separate the excavation side from the natural ground side;
A row of second steel sheet piles is driven into the ground on the natural ground side of the first row of steel sheet piles at intervals from the first row of steel sheet piles;
An H-shaped steel is driven into the ground so as to be interposed between the rows of the first and second steel sheet piles;
The present invention relates to a method for manufacturing a computer-implemented ...
The H-shaped steel has joints at both end edges of each of the two flanges that can be connected to joints at both end edges of the steel sheet pile,
One flange is interposed in the row of the first steel sheet pile and is connected to adjacent steel sheet piles at their joints,
The other flange is interposed in the second row of steel sheet piles and is connected to adjacent steel sheet piles at their joints.
[Claim 3]
The retaining structure according to claim 1 or 2, characterized in that the H-shaped steel joints are attached by welding to both end edges of the flanges of the H-shaped steel in a manner extending from both end edges.
１ 鋼矢板
１ｊ ジョイント
２ Ｈ形鋼
２ｆ１、２ｆ２ フランジ
２ｗ ウェブ
２ｊ ジョイント
１０ 土留め構造体（土留め壁）
２０ 土留め構造体（二重土留め壁）
２１ 第１の壁体（第１の鋼矢板の列）
２２ 第２の壁体（第２の鋼矢板の列）
1 Steel sheet pile 1j Joint 2 H-shaped steel 2f1, 2f2 Flange 2w Web 2j Joint 10 Earth retaining structure (earth retaining wall)
20 Earth retaining structure (double earth retaining wall)
21 First wall (first steel sheet pile row)
22 Second wall (second row of steel sheet piles)
Claims (3)
前記第１の鋼矢板の列より地山側の地盤に、前記第１の鋼矢板の列に対し間隔をあけて打ち込まれる第２の鋼矢板の列と、
前記第１及び第２の鋼矢板の列中に介在するように地盤に打ち込まれ、ウェブの厚さが、前記第１の鋼矢板の厚さよりも厚く、かつ、前記第２の鋼矢板の厚さよりも厚いＨ形鋼と、
を含んで構成され、
上面視で、前記第１の鋼矢板の列の波形と前記第２の鋼矢板の列の波形とが同位相となるように、前記第１の鋼矢板の列と前記第２の鋼矢板の列とが並列に配置され、
前記Ｈ形鋼は、２つのフランジのそれぞれの両端縁に、前記鋼矢板の両端縁のジョイントと連結可能なジョイントを有し、
一方のフランジが、前記第１の鋼矢板の列中に介在して、両隣りの鋼矢板と互いのジョイントどうしで連結され、
他方のフランジが、前記第２の鋼矢板の列中に介在して、両隣りの鋼矢板と互いのジョイントどうしで連結され、
前記第１の鋼矢板の列と前記第２の鋼矢板の列との間の地盤に固化材が注入されることを特徴とする、土留め構造。 A first row of steel sheet piles is driven into the ground so as to separate the excavation side from the natural ground side;
A row of second steel sheet piles is driven into the ground on the natural ground side of the first row of steel sheet piles at intervals from the first row of steel sheet piles;
an H-shaped steel that is driven into the ground so as to be interposed between the rows of the first and second steel sheet piles , and a thickness of a web is thicker than a thickness of the first steel sheet pile and thicker than a thickness of the second steel sheet pile ;
The present invention relates to a method for manufacturing a computer-implemented ...
The first steel sheet pile row and the second steel sheet pile row are arranged in parallel so that the waveforms of the first steel sheet pile row and the waveforms of the second steel sheet pile row are in phase when viewed from above,
The H-shaped steel has joints at both end edges of each of the two flanges that can be connected to joints at both end edges of the steel sheet pile,
One flange is interposed in the row of the first steel sheet pile and is connected to adjacent steel sheet piles at their joints,
The other flange is interposed in the second row of steel sheet piles and is connected to adjacent steel sheet piles at their joints,
An earth retaining structure, characterized in that a solidifying material is injected into the ground between the first row of steel sheet piles and the second row of steel sheet piles.
前記第１の鋼矢板の列より地山側の地盤に、前記第１の鋼矢板の列に対し間隔をあけて打ち込まれる第２の鋼矢板の列と、
前記第１及び第２の鋼矢板の列中に介在するように地盤に打ち込まれ、ウェブの厚さが、前記第１の鋼矢板の厚さよりも厚く、かつ、前記第２の鋼矢板の厚さよりも厚いＨ形鋼と、
を含んで構成され、
上面視で、前記第１の鋼矢板の列の波形と前記第２の鋼矢板の列の波形とが同位相となるように、前記第１の鋼矢板の列と前記第２の鋼矢板の列とが並列に配置され、
前記Ｈ形鋼は、２つのフランジのそれぞれの両端縁に、前記鋼矢板の両端縁のジョイントと連結可能なジョイントを有し、
一方のフランジが、前記第１の鋼矢板の列中に介在して、両隣りの鋼矢板と互いのジョイントどうしで連結され、
他方のフランジが、前記第２の鋼矢板の列中に介在して、両隣りの鋼矢板と互いのジョイントどうしで連結され、
前記第１の鋼矢板の列と前記第２の鋼矢板の列との間の地下水位が低下させられることを特徴とする、土留め構造。 A first row of steel sheet piles is driven into the ground so as to separate the excavation side from the natural ground side;
A row of second steel sheet piles is driven into the ground on the natural ground side of the first row of steel sheet piles at intervals from the first row of steel sheet piles;
an H-shaped steel that is driven into the ground so as to be interposed between the rows of the first and second steel sheet piles , and a thickness of a web is thicker than a thickness of the first steel sheet pile and thicker than a thickness of the second steel sheet pile ;
The present invention relates to a method for manufacturing a computer-implemented ...
The first steel sheet pile row and the second steel sheet pile row are arranged in parallel so that the waveforms of the first steel sheet pile row and the waveforms of the second steel sheet pile row are in phase when viewed from above,
The H-shaped steel has joints at both end edges of each of the two flanges that can be connected to joints at both end edges of the steel sheet pile,
One flange is interposed in the row of the first steel sheet piles and is connected to adjacent steel sheet piles at their joints,
The other flange is interposed in the second row of steel sheet piles and is connected to adjacent steel sheet piles at their joints,
An earth retaining structure, characterized in that a groundwater level between the first row of steel sheet piles and the second row of steel sheet piles is lowered.
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| JPH0266215A (en) * | 1988-08-30 | 1990-03-06 | Nippon Steel Corp | H-shaped steel sheet pile |
| JPH0266216A (en) * | 1988-08-30 | 1990-03-06 | Nippon Steel Corp | Steel sheet pile for reinforcing bars |
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| JP2002070045A (en) | 2000-09-01 | 2002-03-08 | Nippon Steel Corp | Outer wall of underground structure and construction method |
| JP2006241816A (en) | 2005-03-03 | 2006-09-14 | Sumitomo Metal Ind Ltd | Underground continuous wall |
| JP2008175029A (en) | 2007-01-22 | 2008-07-31 | Nippon Steel Corp | Steel members for underground continuous wall, underground continuous wall |
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