JP4778460B2 - Steel plate cell installation method and structure - Google Patents

Steel plate cell installation method and structure Download PDF

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JP4778460B2
JP4778460B2 JP2007062470A JP2007062470A JP4778460B2 JP 4778460 B2 JP4778460 B2 JP 4778460B2 JP 2007062470 A JP2007062470 A JP 2007062470A JP 2007062470 A JP2007062470 A JP 2007062470A JP 4778460 B2 JP4778460 B2 JP 4778460B2
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steel plate
plate cell
paving stone
stone layer
cell
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JP2008223316A (en
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和弘 山村
将之 大西
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Toa Corp
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Description

本発明は、鋼板セルの据付方法および据付構造に関し、さらに詳しくは、鋼板セルを打設することが困難な硬い水底地盤や、打設が困難になる程、外径が大きな鋼板セルであっても、目標とする所定位置に精度よく安定した状態で鋼板セルを据付けることができる鋼板セルの据付方法および据付構造に関するものである。   The present invention relates to an installation method and an installation structure of a steel plate cell. More specifically, the present invention relates to a hard water bottom ground where it is difficult to place a steel plate cell, or a steel plate cell whose outer diameter is large enough to make placement difficult. The present invention also relates to a steel plate cell installation method and a structure for installing a steel plate cell at a predetermined target position with high accuracy and stability.

護岸、岸壁、防波堤等を構築する際に、筒状の鋼板セルを水底地盤に打設して根入れする施工方法が知られている（例えば、特許文献１参照）。この施工工程は、水底地盤に打設した鋼板セルの内部に中詰材を充填した後、鋼板セルと鋼板セルとの隙間を塞ぐように２枚の鋼板アークを互いの間隔をあけて打設し、この２枚の鋼板アークの間に中詰材を充填して、護岸等を構成する壁状体を形成するものである。   A construction method is known in which a tubular steel plate cell is placed in a waterbed ground when a revetment, a quay, a breakwater, and the like are constructed (see, for example, Patent Document 1). In this construction process, after filling the inside of the steel plate cell placed on the bottom of the ground with the filling material, two steel plate arcs are placed at intervals to close the gap between the steel plate cell and the steel plate cell. Then, a filling material is filled between the two steel sheet arcs to form a wall-like body constituting a revetment or the like.

この方式では、水底地盤が硬くなると鋼板セルを打設することが難しく、また、鋼板セルがある程度の外径（例えば、外径２５ｍ程度）までは打設できても、ある一定程度の外径よりも大きくなると打設できなくなるという問題があった。さらに、水上からは水底地盤上の据付位置が確認しにくいため、目標とする所定位置に精度よく、鋼板セルを据付けることが困難であった。
特開昭５５−５９２２０号公報 In this method, it is difficult to drive the steel plate cell when the water bottom ground becomes hard, and even if the steel plate cell can be driven up to a certain outer diameter (for example, an outer diameter of about 25 m), it has a certain outer diameter. There was a problem that it would not be possible to place it if it was larger than this. Furthermore, since it is difficult to confirm the installation position on the water bottom ground from the surface of the water, it is difficult to install the steel plate cell accurately at a predetermined target position.
JP-A-55-59220

本発明の目的は、鋼板セルを打設することが困難な硬い水底地盤や、打設が困難になる程、外径が大きな鋼板セルであっても、目標とする所定位置に精度よく安定した状態で鋼板セルを据付けることができる鋼板セルの据付方法および据付構造を提供することにある。   The object of the present invention is to stably stabilize a predetermined target position even in a hard water bottom ground where it is difficult to place a steel plate cell or a steel plate cell having a large outer diameter so that the placement becomes difficult. It is providing the installation method and installation structure of a steel plate cell which can install a steel plate cell in a state.

上記目的を達成するため本発明の鋼板セルの据付方法は、掘削した水底地盤に筒状の鋼板セルを配置した後、該鋼板セル周辺の水底地盤に埋め戻し材を投入して埋め戻し、該鋼板セルの内部に中詰材を投入して充填する鋼板セルの据付方法において、前記鋼板セルを掘削した水底地盤に配置するに際し、前記掘削した水底地盤の表面に敷石を投入して敷石層を形成し、該敷石層の所定範囲に対して均し作業を行ない、該均した敷石層の表面に仮受けブロックを配置し、該仮受けブロックに着脱可能に立設した直線状の指標柱を水上に突出した状態にして、該水上に突出した指標柱を基準にして鋼板セルを誘導し、前記仮受けブロックに該鋼板セルの周壁面下端が載置するようにして鋼板セルを敷石層の上に配置し、この配置後に前記指標柱を仮受けブロックから取り外すようにしたことを特徴とするものである。   In order to achieve the above object, the steel plate cell installation method of the present invention, after placing the tubular steel plate cell on the excavated water bottom ground, put backfill material into the water bottom ground around the steel plate cell, backfill, In the steel plate cell installation method in which the filling material is charged by filling the inside of the steel plate cell, when placing the steel plate cell on the submerged ground, the paving stone layer is formed by introducing a paving stone to the surface of the excavated submarine ground. Forming and leveling the predetermined range of the paving stone layer, placing a temporary receiving block on the surface of the leveled paving stone layer, and installing a linear indicator column detachably mounted on the temporary receiving block The steel plate cell is guided on the basis of the indicator column protruding on the water in a state of protruding on the water, and the steel plate cell is placed on the paving stone layer so that the lower end of the peripheral wall surface of the steel plate cell is placed on the temporary receiving block. Placed on the top, and after this placement the indicator column Receiving it has to remove from the block and is characterized in.

ここで、前記仮受けブロックを、１つの鋼板セルに対して３つ配置することもできる。また、前記埋め戻し材として砕石を投入することもできる。   Here, three provisional receiving blocks may be arranged for one steel plate cell. Also, crushed stone can be used as the backfill material.

本発明の鋼板セルの据付構造は、内部に中詰材を充填した筒状の鋼板セルの下端部を、水底地盤に埋入するとともに、この下端部を埋入した周辺の水底地盤を、埋め戻し材により埋め戻して構成した鋼板セルの据付構造において、前記鋼板セルの下端部を、水底地盤に形成した敷石層の上に配置するとともに、該敷石層の表面に配置した仮受けブロックに、鋼板セルの周壁面下端を載置し、該仮受けブロックに、水上に突出する直線状の指標柱を着脱させる着脱手段を設けたことを特徴とするものである。   The steel plate cell installation structure of the present invention embeds the bottom end of a cylindrical steel plate cell filled with filling material in the water bottom ground, and fills the surrounding water bottom ground in which this bottom portion is embedded. In the installation structure of the steel plate cell that is backfilled with the return material, the lower end portion of the steel plate cell is arranged on the paving stone layer formed on the water bottom ground, and the temporary receiving block arranged on the surface of the paving stone layer, The lower end of the peripheral wall surface of the steel plate cell is placed, and the temporary receiving block is provided with an attaching / detaching means for attaching / detaching a linear indicator column protruding above the water.

ここで、前記仮受けブロックを１つの鋼板セルに対して３つ設けることもできる。また、前記埋め戻し材を砕石にすることもできる。また、前記鋼板セルを、周壁面内部に予め複数本の基礎杭を固設したものにすることもでき、この場合、前記複数本の基礎杭の下端をフーチング部材を介して前記敷石層の上に配置することもできる。   Here, three temporary receiving blocks may be provided for one steel plate cell. Further, the backfill material can be crushed stone. In addition, the steel plate cell can be one in which a plurality of foundation piles are fixed in advance inside the peripheral wall surface. In this case, the lower ends of the plurality of foundation piles are placed on the paving stone layer via a footing member. It can also be arranged.

本発明によれば、筒状の鋼板セルが敷石層の上に配置されるとともに、均した敷石層の表面に配置された仮受けブロックに、鋼板セルの周壁面下端が載置されることにより、打設が困難な硬い水底地盤であっても、或いは、打設が困難になる程、外径が大きな鋼板セルであっても、高さ精度を良好にして安定した状態で鋼板セルを据付けることができる。   According to the present invention, the cylindrical steel plate cell is arranged on the paving stone layer, and the peripheral wall lower end of the steel plate cell is placed on the temporary receiving block arranged on the surface of the leveled paving stone layer. Even if it is hard underwater ground that is difficult to place, or even a steel plate cell with a large outer diameter that is difficult to place, the steel plate cell is installed in a stable state with good height accuracy. Can be attached.

さらに、仮受けブロックに水上に突出する直線状の指標柱を立設することにより、この指標柱を基準にして鋼板セルを目標の位置に誘導することができるので、精度よく目標とする所定位置に鋼板セルを据付けることができる。   Furthermore, by setting up a linear index column protruding above the water on the temporary support block, the steel plate cell can be guided to the target position with reference to the index column, so that the target predetermined position can be accurately obtained. The steel plate cell can be installed in

以下、本発明の鋼板セルの据付方法および据付構造を図に示した実施形態に基づいて説明する。   Hereinafter, a steel plate cell installation method and installation structure of the present invention will be described based on the embodiments shown in the drawings.

図１に例示するように、本発明の鋼板セルの据付構造は、内部に中詰材６を充填した円筒状の鋼板セル１の下端部が、水底地盤Ｂに埋入した状態になっていて、この鋼板セル１の下端部を埋入した周辺の水底地盤Ｂは、埋め戻し材７により埋め戻された構成になっている。この鋼板セル１の下端部は、水底地盤Ｂの内部に形成された敷石層２の上に配置され、鋼板セル１の周壁面下端１ａは、敷石層２の表面に配置された仮受けブロック３載置された状態になっている。   As illustrated in FIG. 1, the steel plate cell installation structure of the present invention is such that the lower end portion of the cylindrical steel plate cell 1 filled with the filling material 6 is embedded in the underwater ground B. The peripheral water bottom ground B in which the lower end portion of the steel plate cell 1 is buried is backfilled by the backfilling material 7. The lower end portion of the steel plate cell 1 is disposed on the paving stone layer 2 formed inside the water bottom ground B, and the peripheral wall lower end 1 a of the steel plate cell 1 is disposed on the surface of the paving stone layer 2. It is placed.

後述するが、仮受けブロック３には、水上に突出する直線状の指標柱５を着脱させる着脱手段が設けられている。仮受けブロック３は、例えば、コンクリートまたは鉄筋コンクリートから形成される。   As will be described later, the provisional receiving block 3 is provided with attachment / detachment means for attaching / detaching the linear indicator pillar 5 protruding above the water. The temporary receiving block 3 is made of, for example, concrete or reinforced concrete.

この据付構造によって水底地盤Ｂに据付けられた鋼板セル１と鋼板セル１との隙間には、図２に例示するように、この隙間を塞ぐように２枚の鋼板アーク１２、１２が互いに離間して取り付けられ、対向する２枚の鋼板アーク１２、１２の間には中詰材６が充填されている。このように、複数の鋼板セル１と鋼板アーク１２とにより、護岸、岸壁、防波堤等を構成する壁状体を形成される。鋼板セル１の外径は、特に限定されるものではないが、例えば、１５ｍ〜５０ｍ程度である。   In the gap between the steel plate cell 1 and the steel plate cell 1 installed on the bottom ground B by this installation structure, as shown in FIG. 2, the two steel plate arcs 12 and 12 are separated from each other so as to close the gap. The filling material 6 is filled between the two steel sheet arcs 12 and 12 facing each other. As described above, the plurality of steel plate cells 1 and the steel plate arc 12 form a wall-like body constituting a revetment, a quay, a breakwater, and the like. Although the outer diameter of the steel plate cell 1 is not specifically limited, For example, it is about 15-50 m.

この鋼板セル１の据付構造は、以下に説明する本発明の鋼板セルの据付方法により構築される。まず、図３に例示するように、鋼板セル１の据付位置となる範囲の水底地盤Ｂを所定の深さで掘削する。次いで、掘削した水底地盤Ｂの表面にトレミー管１３等を用いて敷石を投入し、敷石層２を形成する。   The installation structure of the steel plate cell 1 is constructed by the steel plate cell installation method of the present invention described below. First, as illustrated in FIG. 3, a water bottom ground B in a range where the steel plate cell 1 is installed is excavated at a predetermined depth. Next, paving stones are thrown into the surface of the excavated water bottom ground B using the tremy pipe 13 or the like, and the paving stone layer 2 is formed.

次いで、図４に例示するように、仮受けブロック３を配置する敷石層２の所定範囲に対して、重錘均し機等の重錘１１を昇降させることにより、均し作業を行なって平らな状態にする。この均し作業により平らにした敷石層２の表面に、仮受けブロック３を配置する。均し作業は、重錘１１を用いて行なう方法の他に、水中バックホウを用いてバケットにより行ない、或いは、潜水士が均し器具を用いて行なうこともできる。   Next, as illustrated in FIG. 4, the weight 11 such as a weight leveling machine is moved up and down with respect to a predetermined range of the paving stone layer 2 on which the temporary support block 3 is arranged, so that the leveling work is performed and leveled. To make sure The temporary support block 3 is arranged on the surface of the paving stone layer 2 flattened by the leveling operation. In addition to the method of using the weight 11, the leveling operation can be performed by a bucket using an underwater backhoe, or a diver can use a leveling device.

１つの鋼板セル１に対して配置する仮受けブロック３の数は、特に限定されるものではないが、安定性確保の観点からは３個以上が好ましく、コスト等を考慮すると、３個にすることが適切である。例えば、図２に示すように、鋼板セル１と鋼板アーク１２との２つの接続位置と、これら２つの接続位置と略正三角形をなす位置の３つの位置に仮受けブロック３を配置する。   The number of provisional receiving blocks 3 arranged for one steel plate cell 1 is not particularly limited, but is preferably 3 or more from the viewpoint of ensuring stability, and is 3 in consideration of cost and the like. Is appropriate. For example, as shown in FIG. 2, the temporary receiving blocks 3 are arranged at three positions, that is, two connection positions of the steel plate cell 1 and the steel sheet arc 12 and a position that forms a substantially equilateral triangle with the two connection positions.

次いで、図５に例示するように、敷石層２の表面に配置した仮受けブロック３の上面に直線状の指標柱５を取り付けて立設させる。この指標柱５は、仮受けブロック３に立設した際に、水上まで突出する長さを有する鋼管となっている。指標柱５の外径は、据付位置の水深等によって異なるが、例えば、１ｍ〜１．５ｍ程度である。指標柱５として中実柱を用いることもできる。   Next, as illustrated in FIG. 5, the linear indicator column 5 is attached to the upper surface of the temporary receiving block 3 disposed on the surface of the paving stone layer 2 and is erected. The indicator column 5 is a steel pipe having a length that protrudes up to the water when standing on the temporary support block 3. The outer diameter of the index column 5 varies depending on the water depth at the installation position, but is, for example, about 1 m to 1.5 m. A solid column can also be used as the index column 5.

仮受けブロック３には、図８に例示するようにボルト４ａが埋設してあり、指標柱５の先端のフランジ部５ａに形成したボルト穴に、ボルト４ａを挿通させた後、ナット４ｂを螺合して仮受けブロック３に指標柱５を取付ける。この取付け作業は、潜水士により行なう。仮受けブロック３にナット４ｂを埋設し、指標柱５のフランジ部５ａに形成したボルト穴を挿通させたボルト４ａを、この埋設したナット４ｂに螺合させるようにしてもよい。仮受けブロック３と指標柱５とを着脱できれば、ボルト４ａとナット４ｂ以外の着脱手段を仮受けブロック３に設けることもできる。   As illustrated in FIG. 8, a bolt 4 a is embedded in the temporary receiving block 3, and after inserting the bolt 4 a into the bolt hole formed in the flange portion 5 a at the tip of the indicator column 5, the nut 4 b is screwed. At the same time, the index pillar 5 is attached to the temporary receiving block 3. This attachment work is performed by a diver. The nut 4b may be embedded in the temporary receiving block 3, and the bolt 4a through which the bolt hole formed in the flange portion 5a of the indicator column 5 is inserted may be screwed into the embedded nut 4b. If the temporary receiving block 3 and the index pillar 5 can be attached and detached, attaching / detaching means other than the bolt 4a and the nut 4b can be provided in the temporary receiving block 3.

尚、仮受けブロック３の上面に予め指標柱５を取り付けておき、指標柱５と一体化した仮受けブロック３を敷石層２の表面に配置するようにしてもよい。   In addition, the indicator pillar 5 may be attached to the upper surface of the temporary support block 3 in advance, and the temporary support block 3 integrated with the indicator pillar 5 may be disposed on the surface of the paving stone layer 2.

次いで、図６に例示するように、敷石を追加投入して敷石層２の上面を仮受けブロック３の上面に一致させるようにする。この際に、敷石層２の上面が仮受けブロック３の上面よりも突出しないようにすることが好ましい。このようにして、敷石層２の表面に配置された仮受けブロック３に立設した指標柱５の一端部が、水上に突出した状態になる。   Next, as illustrated in FIG. 6, additional paving stones are added so that the upper surface of the paving stone layer 2 coincides with the upper surface of the temporary support block 3. At this time, it is preferable that the upper surface of the paving stone layer 2 does not protrude from the upper surface of the temporary support block 3. In this way, one end of the indicator column 5 erected on the temporary support block 3 disposed on the surface of the paving stone layer 2 is in a state of protruding above the water.

次いで、図７に例示するように、水上に突出した指標柱５を基準にして、起重機船で吊下げた鋼板セル１を誘導し、敷石層２の上に配置する。その際に、鋼板セル１の周壁面下端１ａを仮置きブロック３に載置させる。指標柱５が鋼板セル１の据付位置の指標（目印）となるので、精度よく容易に、目標となる所定位置に鋼板セル１を配置することができる。所定位置に配置した鋼板セル１の内部には、所定量の中詰材６を投入、充填して鋼板セル１を安定させる。鋼板セル１の下端と敷石層２の表面との間にすき間が生じている場合であっても、このすき間は投入した中詰材６により塞がれることになる。   Next, as illustrated in FIG. 7, the steel plate cell 1 suspended by the hoist ship is guided on the basis of the index pillar 5 protruding on the water, and is arranged on the paving stone layer 2. At that time, the peripheral wall lower end 1 a of the steel plate cell 1 is placed on the temporary placement block 3. Since the index column 5 serves as an index (mark) of the installation position of the steel plate cell 1, the steel plate cell 1 can be arranged accurately and easily at a predetermined target position. A predetermined amount of filling material 6 is charged and filled in the steel plate cell 1 arranged at a predetermined position to stabilize the steel plate cell 1. Even if there is a gap between the lower end of the steel plate cell 1 and the surface of the paving stone layer 2, the gap is blocked by the inserted filling material 6.

また、本発明では、指標柱５の水上に突出した上端部にＧＰＳアンテナを装着することもできる。この場合は、ＧＰＳアンテナからの位置データを、鋼板セル１を据付ける作業船でモニターしながら、この位置データに基づいて鋼板セル１を誘導して敷石層２の上に配置する。   Further, in the present invention, a GPS antenna can be attached to the upper end portion of the indicator column 5 protruding above the water. In this case, the position data from the GPS antenna is monitored by a work ship on which the steel plate cell 1 is installed, and the steel plate cell 1 is guided on the paving stone layer 2 based on the position data.

指標柱５は、鋼板セル１を敷石層２の上に配置した後、仮受けブロック３から取り外す。この取外し作業は、取付け作業と反対の手順で潜水士により行なう。取り外した指標柱５は、別の仮受けブロック３に着脱して繰返し使用する。   The indicator column 5 is removed from the temporary receiving block 3 after the steel plate cell 1 is disposed on the paving stone layer 2. This removal work is carried out by a diver in the reverse procedure of the installation work. The detached index column 5 is repeatedly attached to and detached from another temporary receiving block 3.

上記の各工程により、複数の鋼板セル１を敷石層２の上に配置した後は、図２に例示するように、鋼板セル１と鋼板セル１との隙間を塞ぐように、２枚の鋼板アーク１２、１２を互いに離間して取り付ける。図８に例示するように、鋼板アーク１２は両端に断面Ｔ字状の接続端部１２ａを有しており、この接続端部１２ａと鋼板セル１の周壁面外周に設けられた接続ブラケット１ｂとを嵌合させて、鋼板アーク１２を鋼板セル１に取り付ける。取り付けた対向する２枚の鋼板アーク１２、１２の間には、中詰材６を投入して充填する。中詰材６としては、砂、製鋼スラグ、砕石等を例示することができる。   After arranging the plurality of steel plate cells 1 on the paving stone layer 2 by the above steps, two steel plates so as to close the gap between the steel plate cell 1 and the steel plate cell 1 as illustrated in FIG. The arcs 12, 12 are mounted spaced apart from each other. As illustrated in FIG. 8, the steel sheet arc 12 has a connection end portion 12 a having a T-shaped cross section at both ends, and the connection end portion 12 a and the connection bracket 1 b provided on the outer peripheral wall surface of the steel plate cell 1. And the steel plate arc 12 is attached to the steel plate cell 1. Between the two opposed steel plate arcs 12, 12, the filling material 6 is charged and filled. Examples of the filling material 6 include sand, steelmaking slag, and crushed stone.

次いで、鋼板セル１周辺の掘削した水底地盤Ｂに、埋め戻し材７を投入して埋め戻すことにより、図１に示した鋼板セル１の据付構造となる。鋼板セル１を敷石層２の上に配置し、均した敷石層２の表面に配置された仮受けブロック３に、鋼板セル１の周壁面下端１ａを載置するので、鋼板セル１が打設することができない程、水底地盤Ｂが硬い場合であっても、或いは、打設が困難な程、鋼板セル１の外径が大きな場合であっても、高さ精度を良好にして安定した状態で鋼板セル１を据付けることができる。また、鋼板セル１の不等沈下も防止することができる。   Next, the backfill material 7 is charged into the excavated water bottom ground B around the steel plate cell 1 and backfilled, so that the installation structure of the steel plate cell 1 shown in FIG. 1 is obtained. Since the steel plate cell 1 is placed on the paving stone layer 2 and the peripheral wall lower end 1a of the steel plate cell 1 is placed on the temporary receiving block 3 placed on the surface of the leveled paving stone layer 2, the steel plate cell 1 is placed. Even when the bottom B is so hard that it cannot be done, or even when the outer diameter of the steel plate cell 1 is so large that the placement is difficult, the height accuracy is good and stable. The steel plate cell 1 can be installed. Further, uneven settlement of the steel plate cell 1 can be prevented.

埋め戻し材７は、砕石にすることが好ましく、砕石にすることにより鋼板セル１の根入れ効果を十分に発揮できるようになり、据付けた鋼板セル１を一段と安定した状態に維持することができる。このように根入れ効果を十分に発揮できるので、例えば、「港湾の施設の技術上の基準・同解説（上・下）：社団法人日本港湾協会平成１１年発行」に記載の設計方法（同解説下巻７２７頁〜７３０頁）に準拠して鋼板セル１を設計することが可能になる。これにより、鋼板セル１の小型化等ができるようになる。   The backfill material 7 is preferably made of crushed stone. By making the crushed stone, the effect of setting the steel plate cell 1 can be sufficiently exhibited, and the installed steel plate cell 1 can be maintained in a more stable state. . In this way, the rooting effect can be fully exhibited. For example, the design method described in “Technical Standards for Port Facilities / Description (above / below): Issued by Japan Port Association 1999” It becomes possible to design the steel plate cell 1 in accordance with the explanation lower volume pages 727 to 730). Thereby, size reduction of the steel plate cell 1 can be performed.

本発明では、鋼板セル１として図９、１０に例示するように、周壁面内部に予め複数本の基礎杭８を固設したものを用いることができる。この基礎杭８は、鋼板セル１とほぼ同じ長さの鋼管であり、固縛材９を介して鋼板セル１に仮固定されている。それぞれの基礎杭８は、その上端が、鋼板セル１の据付方向と同じ方向に一列に並ぶように配置されている。   In this invention, as illustrated in FIGS. 9 and 10 as the steel plate cell 1, one in which a plurality of foundation piles 8 are fixed in advance in the peripheral wall surface can be used. The foundation pile 8 is a steel pipe having substantially the same length as the steel plate cell 1, and is temporarily fixed to the steel plate cell 1 through a lashing material 9. Each foundation pile 8 is arrange | positioned so that the upper end may be located in a line in the same direction as the installation direction of the steel plate cell 1.

据付けた複数の鋼板セル１と鋼板アーク１２とで構築した岸壁等の造成地に、コンテナクレーン用のレールを敷設する場合には、クレーン荷重を支持するためにレールの下方位置に基礎杭を打設するが、この鋼板セル１を用いれば、鋼板セル１を据付けた後に、新たに基礎杭８を打設する必要がなくなり、作業効率を向上させることが可能になる。   When laying rails for container cranes on a construction site such as a quay constructed by a plurality of installed steel plate cells 1 and steel plate arcs 12, a foundation pile is driven at a position below the rails to support the crane load. However, if this steel plate cell 1 is used, after installing the steel plate cell 1, it is not necessary to newly place the foundation pile 8, and it becomes possible to improve work efficiency.

基礎杭８の下端は、例えば、図１１に例示するように敷石層２の表面に配置したフーチング部材１０を介して敷石層２の上に配置された構造にする。フーチング部材１０は、箱状の枠体を鋼鉄または鉄筋コンクリートにより形成して、枠体内部を鉄筋コンクリートにより形成し、或いは全体を鉄筋コンクリートにより箱状に形成する。このフーチング部材１０は、現場で打設して形成しても、予め形成したものを用いても良い。   The lower end of the foundation pile 8 is made into the structure arrange | positioned on the paving stone layer 2 via the footing member 10 arrange | positioned on the surface of the paving stone layer 2 so that it may illustrate in FIG. The footing member 10 is formed by forming a box-shaped frame body from steel or reinforced concrete, and forming the inside of the frame body from reinforced concrete, or forming the whole box-shaped from reinforced concrete. The footing member 10 may be formed on site or formed in advance.

鋼板セル１の内部に中詰材６を投入する前に、基礎杭８の内部には上端からグラウト材Ｇを投入し、グラウト材Ｇによって基礎杭８の下端とフーチング部材１０とを一体化させる。その後、鋼板セル１の内部に中詰材６を投入する。これにより、基礎杭８は一段と安定した状態で埋設されることになる。中詰材６を投入する過程で、中詰材６が下段の固縛材９の高さ位置まで充填される前に、下段の固縛材９を撤去し、同様に中詰材６が上段の固縛材９の高さ位置まで充填される前に、上段の固縛材９を撤去する。   Before putting the filling material 6 into the steel plate cell 1, the grout material G is put into the foundation pile 8 from the upper end, and the lower end of the foundation pile 8 and the footing member 10 are integrated by the grout material G. . Thereafter, the filling material 6 is put into the steel plate cell 1. As a result, the foundation pile 8 is buried in a more stable state. In the process of charging the filling material 6, before the filling material 6 is filled up to the height position of the lower lashing material 9, the lower lashing material 9 is removed, and similarly, the middle stuffing material 6 is placed in the upper stage. The upper lashing material 9 is removed before the lashing material 9 is filled to the height position.

本発明の鋼板セルの据付構造を例示する正面図である。It is a front view which illustrates the installation structure of the steel plate cell of this invention. 図１の平面図である。It is a top view of FIG. 本発明の鋼板セルの据付方法を例示する説明図である。It is explanatory drawing which illustrates the installation method of the steel plate cell of this invention. 図３の次の工程を例示する説明図である。FIG. 4 is an explanatory diagram illustrating the next process of FIG. 3. 図４の次の工程を例示する説明図である。FIG. 5 is an explanatory diagram illustrating the next process of FIG. 4. 図５の次の工程を例示する説明図である。FIG. 6 is an explanatory diagram illustrating the next step of FIG. 5. 図６の次の工程を例示する説明図である。FIG. 7 is an explanatory diagram illustrating the next process of FIG. 6. 図１の仮受けブロックおよび鋼板セルと鋼板アークとの取付け部分を例示する拡大平面図である。FIG. 2 is an enlarged plan view illustrating a temporary receiving block and a mounting portion of a steel plate cell and a steel plate arc in FIG. 1. 図１の鋼板セルの変形例を示す断面図である。It is sectional drawing which shows the modification of the steel plate cell of FIG. 図９の平面図である。FIG. 10 is a plan view of FIG. 9. 図９の基礎杭の下端部を例示する断面図である。It is sectional drawing which illustrates the lower end part of the foundation pile of FIG.

符号の説明Explanation of symbols

１ 鋼板セル
１ａ 周壁面下端
１ｂ 接続ブラケット
２ 敷石層
３ 仮受けブロック
４ａ ボルト
４ｂ ナット
５ 指標柱
５ａ フランジ部
６ 中詰材
７ 埋め戻し材
８ 基礎杭
９ 固縛材
１０ フーチング部材
１１ 重錘
１２ 鋼板アーク
１２ａ 接続端部
１３ トレミー管
Ｂ 水底地盤
Ｇ グラウト材 DESCRIPTION OF SYMBOLS 1 Steel plate cell 1a Peripheral wall lower end 1b Connection bracket 2 Paving stone layer 3 Temporary receiving block 4a Bolt 4b Nut 5 Index pillar 5a Flange part 6 Filling material 7 Backfill material 8 Foundation pile 9 Fastening material 10 Footing member 11 Weight 12 Steel plate Arc 12a Connection end 13 Tremy tube B Submarine ground G Grout material

Claims (8)

掘削した水底地盤に筒状の鋼板セルを配置した後、該鋼板セル周辺の水底地盤に埋め戻し材を投入して埋め戻し、該鋼板セルの内部に中詰材を投入して充填する鋼板セルの据付方法において、前記鋼板セルを掘削した水底地盤に配置するに際し、前記掘削した水底地盤の表面に敷石を投入して敷石層を形成し、該敷石層の所定範囲に対して均し作業を行ない、該均した敷石層の表面に仮受けブロックを配置し、該仮受けブロックに着脱可能に立設した直線状の指標柱を水上に突出した状態にして、該水上に突出した指標柱を基準にして鋼板セルを誘導し、前記仮受けブロックに該鋼板セルの周壁面下端が載置するようにして鋼板セルを敷石層の上に配置し、この配置後に前記指標柱を仮受けブロックから取り外すようにした鋼板セルの据付方法。   A steel plate cell in which a cylindrical steel plate cell is placed on the excavated water bottom ground, and then backfilled by filling a back ground material around the steel plate cell and filled with a filling material inside the steel plate cell. In the installation method, when the steel plate cell is placed on the excavated submarine ground, a paving stone is formed on the surface of the excavated submarine ground to form a paving stone layer, and a leveling operation is performed with respect to a predetermined range of the paving stone layer. The temporary support block is arranged on the surface of the leveled paving stone layer, and the linear indicator column detachably erected on the temporary support block is protruded above the water, and the indicator column protruding above the water is The steel plate cell is guided as a reference, and the steel plate cell is arranged on the paving stone layer so that the lower end of the peripheral wall surface of the steel plate cell is placed on the temporary receiving block, and after this arrangement, the indicator column is removed from the temporary receiving block. How to install the steel plate cell to be removed . 前記仮受けブロックを、１つの鋼板セルに対して３つ配置する請求項１に記載の鋼板セルの据付方法。   The steel plate cell installation method according to claim 1, wherein three temporary receiving blocks are arranged for one steel plate cell. 前記埋め戻し材として砕石を投入する請求項１または２に記載の鋼板セルの据付方法。   The method for installing a steel plate cell according to claim 1 or 2, wherein crushed stone is added as the backfill material. 内部に中詰材を充填した筒状の鋼板セルの下端部を、水底地盤に埋入するとともに、この下端部を埋入した周辺の水底地盤を、埋め戻し材により埋め戻して構成した鋼板セルの据付構造において、前記鋼板セルの下端部を、水底地盤に形成した敷石層の上に配置するとともに、該敷石層の表面に配置した仮受けブロックに、鋼板セルの周壁面下端を載置し、該仮受けブロックに、水上に突出する直線状の指標柱を着脱させる着脱手段を設けた鋼板セルの据付構造。   A steel plate cell constructed by embedding the bottom end of a cylindrical steel plate cell filled with filling material in the water bottom ground and backfilling the surrounding water bottom ground in which the bottom end is embedded with backfill material. In this installation structure, the lower end portion of the steel plate cell is disposed on the paving stone layer formed on the water bottom ground, and the lower end of the peripheral wall surface of the steel plate cell is placed on the temporary receiving block disposed on the surface of the paving stone layer. A steel plate cell installation structure in which the temporary receiving block is provided with attachment / detachment means for attaching / detaching a linear indicator column protruding above water. 前記仮受けブロックを１つの鋼板セルに対して３つ設けた請求項４に記載の鋼板セルの据付構造。   The steel plate cell installation structure according to claim 4, wherein three temporary receiving blocks are provided for one steel plate cell. 前記埋め戻し材が砕石である請求項４または５に記載の鋼板セルの据付構造。   The steel sheet cell installation structure according to claim 4 or 5, wherein the backfill material is crushed stone. 前記鋼板セルが、周壁面内部に予め複数本の基礎杭を固設したものである請求項４〜６のいずれかに記載の鋼板セルの据付構造。   The steel plate cell installation structure according to any one of claims 4 to 6, wherein the steel plate cell has a plurality of foundation piles fixed in advance in a peripheral wall surface. 前記複数本の基礎杭の下端が、フーチング部材を介して前記敷石層の上に配置されている請求項７に記載の鋼板セルの据付構造。   The steel plate cell installation structure according to claim 7, wherein lower ends of the plurality of foundation piles are disposed on the paving stone layer via a footing member.
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Publication number Priority date Publication date Assignee Title
JP2019138031A (en) * 2018-02-08 2019-08-22 日立造船株式会社 Installation method of steel plate cell, and steel plate cell

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019138031A (en) * 2018-02-08 2019-08-22 日立造船株式会社 Installation method of steel plate cell, and steel plate cell
JP7083656B2 (en) 2018-02-08 2022-06-13 日立造船株式会社 Installation method of steel plate cell and steel plate cell

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