JP5823370B2 - Multi-wall construction method - Google Patents

Multi-wall construction method Download PDF

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JP5823370B2
JP5823370B2 JP2012255148A JP2012255148A JP5823370B2 JP 5823370 B2 JP5823370 B2 JP 5823370B2 JP 2012255148 A JP2012255148 A JP 2012255148A JP 2012255148 A JP2012255148 A JP 2012255148A JP 5823370 B2 JP5823370 B2 JP 5823370B2
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joint
male joint
wall member
continuous wall
space
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JP2014101711A (en
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忠 山本
忠 山本
行博 中谷
行博 中谷
小滝 裕
裕 小滝
義昭 鯨井
義昭 鯨井
雅紀 松井
雅紀 松井
正義 奥山
正義 奥山
孝司 矢野
孝司 矢野
旬 相沢
旬 相沢
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Kajima Corp
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Description

本発明は連壁部材および連壁構築方法に関する。   The present invention relates to a continuous wall member and a continuous wall construction method.

従来、地中壁を構築する方法として、鋼製地中連続壁工法と呼ばれるものがある。鋼製地中連続壁工法は、地盤を掘削した掘削部に、H形形状の鋼材のフランジの両端部に雄継手もしくは雌継手を設けた鋼製連壁部材を、図7(a)に示すように一方の部材の雌継手33に他方の部材の雄継手34を挿入して相互に連結しつつ複数建込むものである(例えば、特許文献1参照)。   Conventionally, as a method for constructing an underground wall, there is a method called a steel underground continuous wall construction method. 7 (a) shows a steel continuous wall member in which a steel joint wall member in which a male joint or a female joint is provided at both ends of a flange of an H-shaped steel material in an excavation part excavating the ground is shown in FIG. As described above, a plurality of the male joints 34 of the other member are inserted into the female joint 33 of the one member and connected to each other (see, for example, Patent Document 1).

鋼製地中連続壁工法としては、安定液掘削工法によって安定液で満たしつつ掘削を行った掘削部に、鋼製連壁部材を建込んだ後、安定液をコンクリートと置換等する工法がある。また、掘削部を掘削しつつ原位置土撹拌工によりソイルモルタルを造成し、その中に鋼製連壁部材を建込む工法も知られている。   As a steel underground wall construction method, there is a construction method in which a stable liquid is replaced with concrete after a steel continuous wall member is built in an excavated part excavated while being filled with a stable liquid by a stable liquid excavation method. . There is also known a construction method in which a soil mortar is created by an in-situ soil agitation while excavating an excavation part, and a steel continuous wall member is built therein.

前者の工法では、コンクリートを後充填するため鋼製連壁部材を建込む期間が限定されず、例えば数日を要してもよいという利点があるが、コンクリートを流動させ充填性を高める目的から鋼製連壁部材の雄継手をフランジ高さ方向に断続的に設けるので、コンクリートにクラック等が生じた場合に、断続的に設けた雄継手の間を通って水が漏れだす恐れがある。   The former method does not limit the period of building the steel continuous wall member for post-filling with concrete, and for example, it may take several days, but for the purpose of increasing the filling property by flowing the concrete Since the male joint of the steel continuous wall member is provided intermittently in the flange height direction, there is a risk of water leaking through the intermittently provided male joint when cracks or the like occur in the concrete.

また、後者の工法では、鋼製連壁部材の雄継手を断続的に設ける必要が無く止水性を確保しやすい利点があるが、ソイルモルタルが固化するまでに部材を建込む必要があるので、道路規制等で施工可能期間が限定されると施工が難しくなる。   Moreover, in the latter method, there is an advantage that it is easy to ensure water stopping without the need to intermittently provide a male joint of a steel continuous wall member, but it is necessary to build a member before the soil mortar solidifies. If the construction period is limited due to road regulations, construction becomes difficult.

特開2001−254352号公報JP 2001-254352 A

そこで、これらの工法の利点を組み合わせたものとして、安定液掘削工法により安定液で満たしつつ掘削を行った掘削部に、鋼製連壁部材を建込んだ後、安定液をソイルモルタル(流動化処理土)で置換する工法が考えられる。   Therefore, as a combination of the advantages of these methods, a steel wall member was built in the excavated part that was excavated while being filled with the stable liquid by the stable liquid excavation method, and then the stable liquid was soil mortar (fluidized). A method of replacement with treated soil) is conceivable.

この工法は、ソイルモルタルを後充填するため鋼製連壁部材を建込む期間が限定されない。また、鋼製連壁部材の雄継手をフランジ高さ方向に連続的に設けて前記の止水性の問題も回避できる。ただし、この場合は、図7(a)の雌継手33と雄継手34で挟まれた空間35にソイルモルタルが十分に充填されない等の原因により、継手の連結部で止水性の問題が新たに生じる可能性がある。   In this construction method, since the soil mortar is post-filled, the period during which the steel continuous wall member is built is not limited. Moreover, the male joint of the steel continuous wall member is continuously provided in the flange height direction, so that the above-mentioned problem of water stoppage can be avoided. However, in this case, there is a new problem of water stoppage at the joint of the joint due to the reason that the space 35 sandwiched between the female joint 33 and the male joint 34 in FIG. It can happen.

そこで、この空間35には、別途ソイルモルタルやグラウト等を止水材として充填し、止水性を確保することが考えられる。止水材を充填する際には、空間35にジェット洗浄ロッドなどの清掃装置を挿入してこれにより清掃を行い、打設時に侵入したソイルモルタルを除去する必要がある。   Therefore, it is conceivable that the space 35 is separately filled with soil mortar, grout or the like as a water-stopping material to ensure water-stopping. When filling the waterstop material, it is necessary to insert a cleaning device such as a jet cleaning rod into the space 35 to perform cleaning, and to remove the soil mortar that has entered during the placement.

ところで、従来の雄継手34は図7(a)に示すようにT字状に形成されるので、図7(a)のように雌継手33と雄継手34の間が広く清掃装置を通すスペースがある場合はよいが、図7(b)に示すように雄継手34が雌継手33の奥深くまで挿入されていると、清掃装置を通すスペースが確保できない。従って、鋼製連壁部材の建込み時に、雌継手33と雄継手34の間に清掃装置を挿入するスペースを確保するための建込精度が必要であり、施工が難しい。   By the way, since the conventional male joint 34 is formed in a T shape as shown in FIG. 7A, a space between the female joint 33 and the male joint 34 is wide as shown in FIG. However, if the male joint 34 is inserted deep into the female joint 33 as shown in FIG. 7B, a space for passing the cleaning device cannot be secured. Therefore, when the steel continuous wall member is installed, it is necessary to have an installation accuracy for securing a space for inserting the cleaning device between the female joint 33 and the male joint 34, and the construction is difficult.

本発明は、前述した問題点に鑑みてなされたもので、建込精度に関わらず、継手の連結部の清掃が可能な連壁部材等を提供することを目的とする。   The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a continuous wall member and the like that can clean the connecting portion of the joint regardless of the mounting accuracy.

前述した目的を達するための発明は、連壁部材同士の連結によって連壁を構成する際に連結対象の連壁部材の雌継手の内側に挿入するための雄継手を備えた連壁部材であって、前記雄継手の形状が、平面上凹部を有するように形成されたことを特徴とする連壁部材を用いるIn the present invention for achieving the above-described object, a connecting wall member provided with a male joint to be inserted inside a female joint of a connecting wall member to be connected when the connecting wall is constituted by connecting the connecting wall members to each other. And the shape of the said male joint is formed so that it may have a recessed part on a plane, The continuous wall member characterized by the above-mentioned is used .

本発明では、雄継手が雌継手内のどの位置にあっても、雄継手の凹部の内側のスペースをジェット洗浄ロッド等の清掃装置の挿入に用いることができ、連壁部材の建込精度に関わらず、継手の連結部の清掃が可能になる。   In the present invention, regardless of the position of the male joint in the female joint, the space inside the recess of the male joint can be used for insertion of a cleaning device such as a jet cleaning rod, Regardless, the joint connection can be cleaned.

前記雄継手の形状が、円弧状に形成されることが望ましい。
雌継手は、通常円周の一部を切欠いた形状に形成されるので、雄継手を円弧状に形成すると、雌継手内への挿入が容易になる。
It is desirable that the male joint is formed in an arc shape.
Since the female joint is usually formed in a shape in which a part of the circumference is notched, if the male joint is formed in an arc shape, insertion into the female joint becomes easy.

発明は、地盤を掘削した掘削部に、一方の連壁部材の雌継手の内側に他方の連壁部材の雄継手を挿入して相互に連結しつつ建込んだ複数の連壁部材の周囲を充填材で充填した連壁を構築する工程(a)と、前記雄継手と前記雌継手で挟まれた空間に清掃装置を挿入して前記空間を清掃した後、前記空間に止水材を充填する工程(b)と、を備え、前記雄継手の形状が、平面上凹部を有し、且つ前記雄継手の前記雌継手内での位置が前記連壁部材の連結方向に可変なように形成されたことを特徴とする連壁構築方法である。 The present invention relates to the excavation part excavating the ground around a plurality of continuous wall members constructed by inserting the male joint of the other continuous wall member inside the female joint of one continuous wall member and connecting them together. (A) for constructing a continuous wall filled with a filler, and after cleaning the space by inserting a cleaning device into a space sandwiched between the male joint and the female joint, a water stop material is placed in the space. comprising a step (b) of filling, the shape of the male joint, have a plan on the recess, and so that the position within the female fitting of the male joint is variable in the direction of connection the connecting wall member It is the continuous wall construction method characterized by having been formed.

これにより、継手の連結部での止水を確実に行うことができる。また、雄継手が凹部を有するので、前記したように、連壁部材の建込精度に関わらず継手の連結部の清掃が可能になる。   Thereby, the water stop in the connection part of a joint can be performed reliably. In addition, since the male joint has a concave portion, as described above, it is possible to clean the joint portion of the joint regardless of the mounting accuracy of the connecting wall member.

前記雄継手の形状が、円弧状に形成されることが望ましい。
雄継手を円弧状に形成することで、前記した通り、雌継手内への挿入が容易になる。
It is desirable that the male joint is formed in an arc shape.
By forming the male joint in an arc shape, the insertion into the female joint becomes easy as described above.

前記工程(a)において、掘削部を安定液で満たしつつ前記地盤の掘削を行い、前記掘削部に前記連壁部材を建込んだ後、前記安定液を前記充填材であるソイルモルタルもしくは流動化処理土で置き換えることが望ましい。
この方法では、ソイルモルタル等を後充填するため連壁部材を建込む期間が限定されず、また雄継手を連続的に設けて前述したような止水性の問題も回避できる。ただし、前述した通り継手の連結部で止水性の問題が新たに生じることがあるので、上記のように雌継手と雄継手で挟まれた空間にて清掃と止水材の充填を行って止水性を確保することが特に有効である。
In the step (a), the ground is excavated while the excavation part is filled with a stabilizing liquid, and the connecting wall member is built in the excavation part, and then the stable liquid is a soil mortar or fluidized as the filler. It is desirable to replace with treated soil.
In this method, since the soil mortar or the like is post-filled, the period during which the continuous wall member is built is not limited, and a male joint can be continuously provided to avoid the above-described water-stopping problem. However, as mentioned above, there may be a problem of water-stopping at the joint of the joint, so as described above, clean and fill with water-stopping material in the space between the female joint and the male joint. It is particularly effective to ensure aqueous properties.

本発明により、建込精度に関わらず、継手の連結部の清掃が可能な連壁部材等を提供することができる。   According to the present invention, it is possible to provide a continuous wall member or the like capable of cleaning the connecting portion of the joint regardless of the mounting accuracy.

鋼製連壁1について示す図The figure shown about the steel connection wall 1 鋼製連壁部材10a、10bを示す図The figure which shows steel continuous wall members 10a and 10b 鋼製連壁1の構築方法を示す図The figure which shows the construction method of the steel connection wall 1 鋼製連壁1の構築方法を示す図The figure which shows the construction method of the steel connection wall 1 継手の連結部を示す図Diagram showing joint connection 継手の連結部を示す図Diagram showing joint connection 継手の連結部を示す図Diagram showing joint connection

以下、図面を参照しながら、本発明の実施形態について説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図1は、本実施形態の鋼製連壁部材を用いた鋼製連壁1(連壁)について示す図である。鋼製連壁1は、地盤100の掘削部110にH形形状の鋼材である鋼製連壁部材10a、10b(連壁部材)を相互に連結して建込み、その周囲を充填材であるソイルモルタル140で充填したものである。なお、充填材としては流動化処理土を用いることも可能である。   Drawing 1 is a figure shown about steel connection wall 1 (continuous wall) using the steel connection wall member of this embodiment. The steel continuous wall 1 is constructed by connecting steel continuous wall members 10a and 10b (continuous wall members), which are H-shaped steel materials, to the excavation part 110 of the ground 100, and the periphery thereof is a filler. Filled with soil mortar 140. It is also possible to use fluidized soil as the filler.

図2は、鋼製連壁部材10a、10bの平面を示す図である。鋼製連壁部材10a、10bは、1対のフランジ11の幅方向の中央部分をウェブ12により接続したH形形状を有する鋼材であり、フランジ11の幅方向の両端部に継手が設けられる。鋼製連壁部材10aでは雌継手13が設けられる。鋼製連壁部材10bでは、連結対象である鋼製連壁部材10aの雌継手13に挿入するための雄継手14が設けられる。本実施形態では、雌継手13が円周の一部を切欠いた形状を有し、雄継手14が円弧状に形成されている。これらの継手は、フランジ高さ方向に連続して設けられる。   FIG. 2 is a view showing a plane of the steel continuous wall members 10a and 10b. The steel continuous wall members 10 a and 10 b are steel materials having an H shape in which a center portion in the width direction of a pair of flanges 11 is connected by a web 12, and joints are provided at both ends of the flange 11 in the width direction. A female joint 13 is provided in the steel continuous wall member 10a. The steel joint wall member 10b is provided with a male joint 14 for insertion into the female joint 13 of the steel joint wall member 10a to be connected. In this embodiment, the female joint 13 has a shape in which a part of the circumference is cut out, and the male joint 14 is formed in an arc shape. These joints are provided continuously in the flange height direction.

図1に示すように、鋼製連壁部材10a、10bは、鋼製連壁部材10aの雌継手13内に鋼製連壁部材10bの雄継手14を挿入することで連結される。   As shown in FIG. 1, the steel continuous wall members 10a and 10b are connected by inserting the male joint 14 of the steel continuous wall member 10b into the female joint 13 of the steel continuous wall member 10a.

これら雌継手13、雄継手14で挟まれた空間21には、止水材22が充填される。止水材22としては例えばソイルモルタルやグラウト等を用いるが、これらに限ることなく、止水機能を有する材料を適宜用いることができる。また、本実施形態では、端部の鋼製連壁部材10aの雌継手13の内側に保護材23を配置している。この雌継手13は、後ほど未掘削部120に建込む鋼製連壁部材との連結に用いるので、こうしてソイルモルタル140の侵入を防いでおく。   A space 21 sandwiched between the female joint 13 and the male joint 14 is filled with a water stop material 22. For example, soil mortar, grout or the like is used as the water-stopping material 22, but the material having a water-stopping function can be appropriately used without being limited thereto. Moreover, in this embodiment, the protective material 23 is arrange | positioned inside the female joint 13 of the steel continuous wall member 10a of an edge part. Since this female joint 13 is used for connection with a steel continuous wall member that will be built in the unexcavated part 120 later, the penetration of the soil mortar 140 is thus prevented.

次に、図3、4を参照して、鋼製連壁1の構築方法について説明する。   Next, with reference to FIG. 3, 4, the construction method of the steel connection wall 1 is demonstrated.

鋼製連壁1を構築するには、まず図3(a)に示すように、地盤100を掘削して掘削部110を形成する。本実施形態では、安定液掘削工法により、掘削部110を安定液130で満たしつつ掘削を行う。   In order to construct the steel continuous wall 1, first, as shown in FIG. 3A, the ground 100 is excavated to form an excavation part 110. In this embodiment, excavation is performed while the excavation part 110 is filled with the stabilization liquid 130 by the stable liquid excavation method.

次いで、図3(b)に示すように、鋼製連壁部材10a、10bを、一方の部材10aの雌継手13の内側に他方の部材10bの雄継手14を通して連結しつつ、掘削部110で連続して複数建込む。端部の鋼製連壁部材10aの雌継手13の内側には、保護材23を配置する。   Next, as shown in FIG. 3 (b), the steel connecting wall members 10a and 10b are connected to the inside of the female joint 13 of one member 10a through the male joint 14 of the other member 10b, and the excavation unit 110 Build several in a row. A protective member 23 is disposed inside the female joint 13 of the steel continuous wall member 10a at the end.

続いて、図3(c)に示すように、鋼製連壁部材10a、10bの周囲にソイルモルタル140を打設し、安定液130と置き換える。   Subsequently, as shown in FIG. 3C, a soil mortar 140 is placed around the steel continuous wall members 10 a and 10 b to replace the stabilizing liquid 130.

その後、図4(a)に示すように、雌継手13と雄継手14で挟まれた空間21に清掃装置であるジェット洗浄ロッド30を挿入して、これを用いて空間21の清掃を行い、空間21に侵入したソイルモルタル140を除去する。ジェット洗浄ロッド30は、高圧の洗浄水の噴射と、ブラシとにより空間21の清掃を行う。ただし、清掃装置はこれに限ることはない。   Thereafter, as shown in FIG. 4A, a jet cleaning rod 30 as a cleaning device is inserted into the space 21 sandwiched between the female joint 13 and the male joint 14, and the space 21 is cleaned using this. The soil mortar 140 that has entered the space 21 is removed. The jet cleaning rod 30 cleans the space 21 by jetting high-pressure cleaning water and a brush. However, the cleaning device is not limited to this.

この時の継手の連結部を示す図が、図5(a)、(b)である。本実施形態では、雄継手14が円弧状に形成されており平面上凹部を有する。従って、図5(a)に示すように雄継手14が雌継手13内に浅く挿入されている場合はもちろん、図5(b)に示すように雄継手14が雌継手13内に深く挿入されている場合にも、雄継手14の凹部の内側のスペースを用いて、ジェット洗浄ロッド30を挿入するスペースが確保できる。   The figure which shows the connection part of the joint at this time is FIG. 5 (a), (b). In the present embodiment, the male joint 14 is formed in an arc shape and has a planar recess. Accordingly, not only when the male joint 14 is inserted shallowly into the female joint 13 as shown in FIG. 5A, but also the male joint 14 is inserted deeply into the female joint 13 as shown in FIG. In this case, a space for inserting the jet cleaning rod 30 can be secured using the space inside the concave portion of the male joint 14.

従って、鋼製連壁部材10a、10bの建込精度に関わらず、常に空間21へのジェット洗浄ロッド30の挿入および空間21の清掃が可能になる。このため、図3(b)に示す工程において、雄継手14の位置に気を払うことなく鋼製連壁部材10a、10bの建込みが行える。   Therefore, the jet cleaning rod 30 can be always inserted into the space 21 and the space 21 can be cleaned regardless of the accuracy of the steel continuous wall members 10a and 10b. For this reason, in the process shown in FIG.3 (b), the steel connection wall members 10a and 10b can be built without paying attention to the position of the male joint 14. FIG.

なお、本実施形態では、ジェット洗浄ロッド30として直径が最大40mm程度のものを想定し、雄継手14の円弧部分の内周が、直径49.5mm程度の円周の、円周角201°程度の範囲の円弧状をなすようにしている。なお、雌継手13の内周は、直径82.5mm程度の円周の一部を切欠いた形状としている。   In the present embodiment, the jet cleaning rod 30 is assumed to have a maximum diameter of about 40 mm, and the inner circumference of the circular arc portion of the male joint 14 is a circle having a diameter of about 49.5 mm and a circumferential angle of about 201 °. The arc is in the range of. The inner periphery of the female joint 13 has a shape in which a part of the circumference having a diameter of about 82.5 mm is cut out.

図4の説明に戻る。図4(a)において前記の空間21を清掃した後は、図4(b)に示すように、空間21に止水材22を充填して、継手の連結部の止水を確実にする。   Returning to the description of FIG. After the space 21 is cleaned in FIG. 4A, as shown in FIG. 4B, the space 21 is filled with a water stop material 22 to ensure the water stop of the connecting portion of the joint.

以上説明したように、本実施形態によれば、雄継手14の形状が円弧状に形成されるので、雄継手14が雌継手13内のどの位置にあっても、雄継手14の凹部の内側のスペースをジェット洗浄ロッド30等の清掃装置の挿入に用いることができ、鋼製連壁部材10a、10bの建込精度に関わらず、継手の連結部の清掃が可能になる。さらに、円周を切欠いた形状を有する雌継手13の内側にも挿入しやすい。   As described above, according to the present embodiment, since the shape of the male joint 14 is formed in an arc shape, no matter where the male joint 14 is located in the female joint 13, This space can be used for insertion of a cleaning device such as the jet cleaning rod 30, and the connecting portion of the joint can be cleaned regardless of the installation accuracy of the steel continuous wall members 10 a and 10 b. Furthermore, it is easy to insert also into the inside of the female joint 13 which has the shape which notched the circumference.

鋼製連壁1の構築の際には、こうして雌継手13と雄継手14で挟まれた空間21の清掃を行い、止水材22を充填することで、継手の連結部の止水性が確保できる。   When the steel connecting wall 1 is constructed, the space 21 sandwiched between the female joint 13 and the male joint 14 is thus cleaned, and the water-stopping material 22 is filled, so that the water-tightness of the connecting portion of the joint is ensured. it can.

また、本実施形態で説明した工法を適用することで、鋼製連壁1の構築の際に、ソイルモルタル140を後充填するため鋼製連壁部材10a、10bを建込む期間が限定されず、また鋼製連壁部材10bの雄継手14を連続的に設けて、断続的に雄継手を設ける場合の止水性の問題も回避できる。ただし、前述した通り継手の連結部で止水性の問題が新たに生じる可能性があるので、上記のようにして雌継手13と雄継手14で挟まれた空間21の清掃と止水材22の充填を行って継手の連結部の止水性を確保することが特に有効である。   In addition, by applying the construction method described in the present embodiment, the period of installing the steel continuous wall members 10a and 10b is not limited in order to post-fill the soil mortar 140 when the steel continuous wall 1 is constructed. Moreover, the problem of water stoppage when the male joint 14 of the steel continuous wall member 10b is provided continuously and the male joint is provided intermittently can be avoided. However, as described above, there is a possibility that a water-stopping problem may newly occur at the joint portion of the joint. Therefore, the cleaning of the space 21 sandwiched between the female joint 13 and the male joint 14 and the water-stopping material 22 are performed as described above. It is particularly effective to ensure the water-stopping of the connecting portion of the joint by filling.

しかしながら、本発明はこれに限ることはない。例えば、図6(a)に示すように雄継手14とフランジ11との接続部分にリブ15を設けて補強することも可能である。なお、図6(a)では、雌継手13とフランジ11との接続部分もリブ16を設けて補強している。   However, the present invention is not limited to this. For example, as shown in FIG. 6A, it is possible to reinforce by providing a rib 15 at a connection portion between the male joint 14 and the flange 11. In FIG. 6A, the connecting portion between the female joint 13 and the flange 11 is also reinforced by providing ribs 16.

さらに、雄継手の形状も本実施形態に限ることはない。例えば、図6(b)の雄継手14aに示すように円弧を延長することも可能である。図6(b)の雄継手14aは、図5等で説明した雄継手14の内周を、円周角229°程度の範囲まで延長したものである。その他、円弧の径の大きさ等も変更でき、これらはジェット洗浄ロッド30等の清掃装置の大きさなどに応じて適宜定めることができる。   Furthermore, the shape of the male joint is not limited to this embodiment. For example, it is possible to extend the arc as shown by the male joint 14a in FIG. The male joint 14a in FIG. 6B is obtained by extending the inner circumference of the male joint 14 described in FIG. 5 and the like to a range of a circumferential angle of about 229 °. In addition, the diameter of the arc can be changed, and these can be appropriately determined according to the size of the cleaning device such as the jet cleaning rod 30.

また、本実施形態では雄継手14を円弧状に形成しているが、雄継手14の形状は、平面上凹部を有するものであれば、その内側のスペースをジェット洗浄ロッド30等の清掃装置の挿入に用いることができる。従って、雄継手14の形状が円弧状に限ることもない。例えば、図6(c)の雄継手14bに示すように、コ字状に形成することも可能である。ただし、通常、雌継手13は本実施形態のように円周を切欠いた形状を有するので、雄継手を円弧状としたほうが雌継手13内に通して挿入しやすい利点がある。   Further, in the present embodiment, the male joint 14 is formed in an arc shape, but if the shape of the male joint 14 has a concave portion on a plane, the space inside the male joint 14 is used for a cleaning device such as the jet cleaning rod 30. Can be used for insertion. Therefore, the shape of the male joint 14 is not limited to an arc shape. For example, as shown in the male joint 14b of FIG. 6C, it can be formed in a U shape. However, since the female joint 13 usually has a shape with a cutout circumference as in the present embodiment, the male joint having an arc shape has the advantage of being easily inserted through the female joint 13.

さらに、本実施形態の鋼製連壁部材10a、10bは、前述したような、掘削部を掘削しつつ原位置土撹拌工によりソイルモルタルを造成し、その中に鋼製連壁部材を建込む従来の工法において用いることも可能である。   Further, the steel continuous wall members 10a and 10b of the present embodiment form a soil mortar by excavating the excavation part as described above, and build the steel continuous wall member therein. It can also be used in conventional construction methods.

以上、添付図面を参照しながら、本発明の好適な実施形態について説明したが、本発明はかかる例に限定されない。当業者であれば、本願で開示した技術的思想の範疇内において、各種の変更例又は修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these naturally belong to the technical scope of the present invention. Understood.

1:鋼製連壁
10a、10b:鋼製連壁部材
13:雌継手
14、14a、14b:雄継手
21:空間
22:止水材
30:ジェット洗浄ロッド
100:地盤
110:掘削部
130:安定液
140:ソイルモルタル
1: Steel connection wall 10a, 10b: Steel connection wall member 13: Female joint 14, 14a, 14b: Male joint 21: Space 22: Water stop material 30: Jet cleaning rod 100: Ground 110: Excavation part 130: Stable Liquid 140: soil mortar

Claims (3)

地盤を掘削した掘削部に、一方の連壁部材の雌継手の内側に他方の連壁部材の雄継手を挿入して相互に連結しつつ建込んだ複数の連壁部材の周囲を充填材で充填した連壁を構築する工程(a)と、
前記雄継手と前記雌継手で挟まれた空間に清掃装置を挿入して前記空間を清掃した後、前記空間に止水材を充填する工程(b)と、
を備え、
前記雄継手の形状が、平面上凹部を有し、且つ前記雄継手の前記雌継手内での位置が前記連壁部材の連結方向に可変なように形成されたことを特徴とする連壁構築方法。
Filled around the multiple wall members built while inserting the male joint of the other wall member inside the female joint of one wall member and connecting them to the excavated part excavating the ground A step (a) of constructing a filled continuous wall;
(B) filling the space with a water stop material after inserting a cleaning device into the space sandwiched between the male joint and the female joint to clean the space;
With
Wherein the shape of the male joint, have a plan on the recess, and communicates wall construction position in the female fitting of the male joint is characterized in that it is formed as a variable in the connection direction of the connecting wall member Method.
前記雄継手の形状が、円弧状に形成されたことを特徴とする請求項記載の連壁構築方法。 Wherein the shape of the male joint, continuous wall building method according to claim 1, characterized in that it is formed in a circular arc shape. 前記工程(a)において、掘削部を安定液で満たしつつ前記地盤の掘削を行い、前記掘削部に前記連壁部材を建込んだ後、前記安定液を前記充填材であるソイルモルタルもしくは流動化処理土で置き換えることを特徴とする請求項または請求項に記載の連壁構築方法。 In the step (a), the ground is excavated while the excavation part is filled with a stabilizing liquid, and the connecting wall member is built in the excavation part, and then the stable liquid is a soil mortar or fluidized as the filler. Out wall construction method according to claim 1 or claim 2, wherein the replacing processing soil.
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