JP6548455B2 - Water stop structure of continuous wall - Google Patents

Water stop structure of continuous wall Download PDF

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JP6548455B2
JP6548455B2 JP2015108232A JP2015108232A JP6548455B2 JP 6548455 B2 JP6548455 B2 JP 6548455B2 JP 2015108232 A JP2015108232 A JP 2015108232A JP 2015108232 A JP2015108232 A JP 2015108232A JP 6548455 B2 JP6548455 B2 JP 6548455B2
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continuous wall
wall member
continuous
connecting wall
water
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JP2016223083A (en
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康丈 生井
康丈 生井
伊東　憲
憲 伊東
一之 松野
一之 松野
信一 田崎
信一 田崎
健 大友
健 大友
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Taisei Corp
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Taisei Corp
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Description

本発明は、地中に設ける連続壁の止水構造に関し、より詳細には、連続壁を構成する連壁部材同士の縦方向の連結部における止水構造に関する。   The present invention relates to a water blocking structure of a continuous wall provided in the ground, and more particularly to a water blocking structure at a longitudinal connection portion of continuous wall members constituting the continuous wall.

地中に連続壁を構築する方法として、例えば特許文献１に記載の鋼製地中連続壁工法がある。
図５に、従来の連続壁の構造を示す。
この連続壁は、地盤を掘削してなる掘削部内に建て込む連壁部材ａと、前記掘削部内に満たす充填材からなる固化体ｂと、を具備する（図５（ａ））。 As a method of constructing a continuous wall in the ground, for example, there is a steel underground continuous wall method described in Patent Document 1.
The structure of the conventional continuous wall is shown in FIG.
This continuous wall comprises a continuous wall member a built in an excavated part excavating the ground, and a solidified body b made of a filler material filled in the excavated part (FIG. 5 (a)).

連壁部材ａは、Ｈ形形状の鋼材であり、フランジの両端に継手を設けた形状を呈している。この継手を介して、横方向（短手方向／平面方向）に順次連壁部材ａを連結することにより連続壁を横方向に延伸することができる。
また、連壁部材ａの縦方向（長手方向／深さ方向）の連結は、現場溶接による方法や、添接板ｃを介してボルト結合する方法がある。 The connecting wall member a is an H-shaped steel material, and has a shape in which joints are provided at both ends of the flange. The continuous wall can be extended in the lateral direction by sequentially connecting the connecting wall members a in the lateral direction (the latitudinal direction / the planar direction) via the joint.
Further, the connection in the longitudinal direction (longitudinal direction / depth direction) of the connecting wall member a can be performed by a method of on-site welding or a method of bolting via a connecting plate c.

固化体ｂは、原位置土撹拌工によって得られるソイルモルタルや、安定液掘削工法による安定液から置換したコンクリート等の充填材を用いる方法が一般的である。   The solidified body b is generally made of a method using a filler such as soil mortar obtained by in-situ soil agitation or concrete substituted from a stabilizer by a stabilizer drilling method.

この連続壁を、仮設の土留壁としてだけでなく、のちに構築する地下構造物の外壁としても兼用する場合がある。この場合、連続壁を構成する連壁部材同士の間には、より確実な止水性が要求される。
連壁部材ａの横方向の連結箇所における止水対策としては、充填材の流動性を向上させて継手間の隙間に侵入し易くする方法や、継手間に充填材とは別にグラウト注入を行う方法などがある。 The continuous wall may be used not only as a temporary earth retaining wall but also as an outer wall of an underground structure to be constructed later. In this case, more reliable water blocking is required between the continuous wall members constituting the continuous wall.
As a water stop measure at the connection point in the lateral direction of the connecting wall member a, grout injection is performed separately from the filling material between the joints by improving the fluidity of the filling material to make it easy to enter the gap between the joints. There is a method.

一方、連壁部材ａの縦方向の連結箇所における止水対策は、普段考慮されていない。これは、連壁部材ａの縦方向（長手方向）は、連壁部材ａが連続しているものであるから、当然止水性が約束されていると考えられているためと思われる。   On the other hand, the water stop measures in the connection part of the longitudinal direction of the connecting wall member a are not usually considered. This is considered to be because it is considered that waterproofness is naturally promised since the continuous wall member a is continuous in the longitudinal direction (longitudinal direction) of the continuous wall member a.

特開２０１４−１０１７０９号公報JP, 2014-101709, A

しかし、連壁部材ａの縦方向への連結に添接板ｃを用いる場合、連壁部材ａの設計上の都合や、連壁部材ａの変形などの要因によって、連結後も連壁部材ａの連結箇所に隙間ｄが生じることが多い（図５（ｂ））。
そうすると、掘削側地盤の掘削によって連壁部材ａが露出した際に、隙間ｄを通して連続壁の内部へと水が出入りしてしまい、止水性を確保することができない場合がある。また、連壁部材ａの連結部周辺の固化体は、構造的にひび割れが発生しやすく、水漏れの原因となることが想定される。
したがって、連壁部材ａを添接板ｃによって連結してなる連続壁を、本体地下壁に兼用する場合には、連壁部材ａの縦方向での連結部の止水性を別途確保する必要があった。 However, when connecting plate c is used for connection in the longitudinal direction of connecting wall member a, connecting wall member a is also after connection by factors such as design convenience of connecting wall member a and deformation of connecting wall member a. In many cases, a gap d is generated at the connection point of (Fig. 5 (b)).
Then, when the continuous wall member a is exposed by the excavation on the excavation side ground, the water may flow into and out of the continuous wall through the gap d, and the waterproofness may not be secured. Moreover, it is assumed that a solidified body in the vicinity of the connection portion of the connecting wall member a is likely to be structurally cracked, which causes water leakage.
Therefore, when the continuous wall formed by connecting the connecting wall member a by the attachment plate c is also used as the main body underground wall, it is necessary to separately secure the waterproofness of the connecting portion in the longitudinal direction of the connecting wall member a. there were.

本願発明は、連壁部材の縦方向の連結に添接板を用いる場合であっても、止水性を確保することが可能な手段の提供を目的の１つとするものである。   An object of the present invention is to provide a means capable of securing waterproofness even when a connecting plate is used for longitudinal connection of a connecting wall member.

上記の課題を解決すべくなされた本願の第１発明は、地盤を掘削してなる掘削部に建て込んだ連壁部材を少なくとも具備する連続壁の止水構造であって、複数の連壁部材を縦方向に連結する、添接板と、連壁部材の縦方向の連結箇所のうち前記添接板と干渉しない位置において、連壁部材の両側面から跨ぐように配置する、一対の張出板と、連結する連壁部材のうち、少なくとも何れか一方の連壁部材の端部に取り付ける弾性部材と、を有し、前記一対の張出板の間に形成される収容空間に全て収容された前記弾性部材でもって止水部を形成することを特徴とする。
The first invention of the present application made to solve the above problems is a water blocking structure of a continuous wall comprising at least a continuous wall member built in an excavating section excavating the ground, comprising a plurality of continuous wall members The pair of overhangs disposed so as to straddle from both sides of the connecting wall member at a position where the connecting plate and the connecting portion in the vertical direction of the connecting wall member do not interfere with the connecting plate. A plate and an elastic member attached to an end portion of at least one of the connecting wall members to be connected, the elastic members being all housed in the housing space formed between the pair of projecting plates; The water blocking portion is formed by an elastic member .

本願発明によれば、以下に記載する効果を奏する。
（１）連壁部材の縦方向の連結に添接板を用いる場合であっても、止水性を確保することができる。よって、連続壁構築後の地盤掘削作業により連壁部材が露出しても、水の侵入などの問題が発生しない。
（２）予期せぬ問題により、施工後に連壁部材間の隙間が拡がってしまった場合でも、弾性部材の復元作用によって、隙間を引き続き埋めることができる。
（３）弾性部材を、連壁部材の端部に被せるように設けることで、弾性部材の剥離や捩れをさらに抑制することができる。
（４）連壁部材の端部に、弾性部材を収容するための収容空間を設けることで、弾性部材の剥離や捩れを抑制可能な止水部を、添接板と干渉することなく設けることができる。 According to the present invention, the following effects can be obtained.
(1) Even in the case of using the contact plate for the longitudinal connection of the connecting wall members, it is possible to secure the water barrier property. Therefore, even if the continuous wall member is exposed by the ground excavating operation after construction of the continuous wall, problems such as water intrusion do not occur.
(2) Even if the gap between the connecting wall members is expanded after construction due to an unexpected problem, the gap can be continuously filled by the restoring action of the elastic member.
(3) Peeling and twisting of the elastic member can be further suppressed by providing the elastic member so as to cover the end of the connecting wall member.
(4) Providing a water stopping portion capable of suppressing peeling and twisting of the elastic member by providing a housing space for housing the elastic member at the end of the connecting wall member without interfering with the contact plate. Can.

本発明に係る連続壁の止水構造を示す概略斜視図。BRIEF DESCRIPTION OF THE DRAWINGS The schematic perspective view which shows the water stop structure of the continuous wall which concerns on this invention. 止水部の構成を示す概略図。Schematic which shows the structure of a water stop part. 止水部のその他の形状例を示す概略図。Schematic which shows the other shape example of a water stop part. 止水部のその他の形状例を示す概略図。Schematic which shows the other shape example of a water stop part. 従来の連続壁を示す概略図であり、（ａ）は平面図、（ｂ）は正面図である。It is the schematic which shows the conventional continuous wall, (a) is a top view, (b) is a front view.

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

＜１＞全体構成
図１および図２を参照しながら、本発明に係る連続壁の止水構造の構成について説明する。
本実施例に係る連続壁は、地盤Ｘを掘削してなる掘削部内に建て込む連壁部材１０と、前記掘削部内に満たす充填材からなる固化体２０と、によって構築する。 <1> Whole structure The structure of the water stop structure of the continuous wall which concerns on this invention is demonstrated, referring FIG. 1 and FIG.
The continuous wall according to the present embodiment is constructed by the continuous wall member 10 built in the excavated portion excavating the ground X, and the solidified body 20 made of the filling material filled in the excavated portion.

＜２＞連壁部材
連壁部材１０は、連続壁の芯材に相当する部材である。
連壁部材の断面形状は、Ｈ形、Ｉ形、矢板形状など、公知の鋼材を採用することができ、特段限定しない。
本実施例では、連壁部材１０は、ウェブ１１およびフランジ１２からなるＨ形形状の鋼材であり、フランジ１２の両端には、他方の連壁部材と連結するための継手１３を設けた形状を呈している。この継手１３を介した連結により、連続壁を横方向に延伸することができる。
継手１３の構造および形状についても、特段限定しない。 <2> Continuous Wall Member The continuous wall member 10 is a member corresponding to the core material of the continuous wall.
Well-known steel materials, such as H shape, I shape, and sheet pile shape, can be employ | adopted for the cross-sectional shape of a connecting wall member, and it does not specifically limit.
In the present embodiment, the connecting wall member 10 is an H-shaped steel material composed of the web 11 and the flange 12, and the flange 12 has a shape provided with a joint 13 for connecting to the other connecting wall member at both ends. It is presenting. The connection through the joint 13 allows the continuous wall to extend in the lateral direction.
The structure and shape of the joint 13 are also not particularly limited.

＜３＞固化体
固化体２０は、連続壁の壁体部分に相当する部材である。
固化体２０には、原位置土撹拌工によって得られるソイルモルタル、安定液掘削工法による安定液から置換したコンクリート、等の充填材を用いる。
充填材は、固化遅延剤と固化促進剤を組み合わせることによって掘削開始から連壁部材１０の建込作業中までテーブルフローを高く保ち、連壁部材１０の建込後は速やかに固化する特性とすることが望ましい。
連壁部材１０の建込作業中に充填材のテーブルフローを高く保っておくと、連壁部材１０の継手１３間への充填材の回り込み性が向上し、連続壁の横方向の継手部分の止水性の向上に寄与し得る。
なお、上記の特性を実現する方法として、アロンソイル（登録商標）などの流動性保持混和剤を添加する方法がある。 <3> Solidified Body The solidified body 20 is a member corresponding to the wall portion of the continuous wall.
For the solidified body 20, a filler such as a soil mortar obtained by in-situ soil agitation, concrete substituted from a stabilizer by a stabilizer drilling method, or the like is used.
The filling material keeps the table flow high from the start of excavation to the erection work of the continuous wall member 10 by combining the solidification retarder and the solidification accelerator, and has the property of rapidly solidifying after the construction of the continuous wall member 10 Is desirable.
By keeping the table flow of the filling material high during the installation work of the connecting wall member 10, the wraparound property of the filling material between the joints 13 of the connecting wall member 10 is improved, and the horizontal joint portion of the continuous wall is It can contribute to the improvement of water barrier properties.
Incidentally, as a method for realizing the above-mentioned characteristics, there is a method of adding a fluid retaining admixture such as Alonsoil (registered trademark).

＜４＞添接板
添接板３０は、連壁部材１０の縦方向（長手方向または深さ方向）の連結に用いる部材である。
添接板３０は、対向する連壁部材１０のフランジ１２を挟むように配置し、両者をボルトナットで締結して、連壁部材同士を連結固定している。 <4> Attachment Plate The attachment plate 30 is a member used for connection in the longitudinal direction (longitudinal direction or depth direction) of the connecting wall member 10.
The contact plate 30 is disposed so as to sandwich the flanges 12 of the facing wall members 10 facing each other, and both are fastened with a bolt and a nut to connect and fix the wall members.

＜５＞止水部
止水部４０は、連壁部材１０の縦方向の連結箇所に生じた隙間を埋めるための部材である。
図２を参照しながら止水部の具体例について以下説明する。 <5> Water stop part The water stop part 40 is a member for filling the clearance which arose in the connection place of the vertical direction of the connecting wall member 10. As shown in FIG.
The specific example of a water stop part is demonstrated below, referring FIG.

＜５．１＞素材例
止水部４０の素材には、ゴム、水膨張ゴム、スポンジなど、建設用途の止水シールとして用いる公知の弾性部材４１を使用することができる。 <5.1> Material Example As a material of the water blocking portion 40, a known elastic member 41 used as a water blocking seal for construction applications, such as rubber, water-expandable rubber, and sponge, can be used.

＜５．２＞形状例
止水部４０の断面形状は、あらゆる態様を採用することができる。
図２では、連壁部材１０を構成するウェブ１１、フランジ１２、継手１３毎に分離した弾性部材４１（４１ａ，４１ｂ，４１ｃ）を用いているが、これらを一体成形したものを用いても良い。
また、図示しないが、止水部４０の上面にリップを設けた形状や、止水部４０の内部に空洞を設けた形状としても良い。 <5.2> Shape example The cross-sectional shape of the water stop part 40 can employ | adopt all aspects.
Although the elastic member 41 (41a, 41b, 41c) separated for each of the web 11, the flange 12, and the joint 13 constituting the connecting wall member 10 is used in FIG. 2, an integrally formed member may be used. .
Further, although not shown, a shape may be provided in which a lip is provided on the upper surface of the water blocking portion 40, or a shape may be provided in which a cavity is provided inside the water blocking portion 40.

＜５．３＞配置例
止水部４０の配置箇所は、上下に連結する連壁部材１０のうち、少なくとも何れか一方の連壁部材１０の端部に取り付ければよい。
すなわち、本発明では、縦方向に連結する連壁部材１０の一方のみに止水部４０を設けても良いし、両方に止水部４０を設けても良い。
なお、図２では、下方の連壁部材１０の上端にのみ、止水部４０を取り付ける態様としている。これは、取付作業が簡単で、且つ止水部４０を正確な位置に取り付けることが可能な方法と考えられるためである。
連壁部材１０と止水部４０の取り付け方法は、接着剤を用いる方法や、止水部４０の底部に接着面を設けておく方法など、公知の方法を適宜選択すれば良い。
その他、添接板３０を仮止めした後に、止水部４０の貼り付け作業を行えば、添接板３０がガイドとなって貼付け作業が容易となる。 <5.3> Arrangement Example The arrangement position of the water blocking portion 40 may be attached to the end of at least one of the continuous wall members 10 connected vertically.
That is, in the present invention, the water blocking portion 40 may be provided on only one side of the continuous wall member 10 connected in the longitudinal direction, or the water blocking portion 40 may be provided on both sides.
In addition, in FIG. 2, it is set as the aspect which attaches the water stop part 40 only to the upper end of the lower connecting wall member 10. As shown in FIG. This is because it can be considered as a method in which the mounting operation is simple and the water shut-off portion 40 can be mounted in an accurate position.
A known method such as a method of using an adhesive or a method of providing an adhesive surface on the bottom of the water blocking portion 40 may be appropriately selected as a method of attaching the connecting wall member 10 and the water blocking portion 40.
In addition, if the attachment work of the water blocking portion 40 is performed after temporarily fixing the attachment plate 30, the attachment plate 30 becomes a guide and the attachment operation becomes easy.

＜６＞作用・効果
再度、図１を参照する。
図１に示すように、下方の連壁部材１０に設けた止水部４０は、上方の連壁部材１０の端部で押圧して潰れた状態となり、連壁部材１０の縦方向の連結箇所に生じる隙間が、完全に閉塞した状態を呈している。
よって、連続壁構築後に、予期せぬ問題によって連壁部材１０のズレや固化体２０のひび割れが発生しても、水の侵入に関する問題は発生しない。 <6> Operation and Effect Refer to FIG. 1 again.
As shown in FIG. 1, the water blocking portion 40 provided on the lower connection wall member 10 is pressed and crushed at the end of the upper connection wall member 10, and the connection location in the vertical direction of the connection wall member 10 The gap created in is completely closed.
Therefore, even if the displacement of the connecting wall member 10 or the crack of the solidified body 20 occurs due to an unexpected problem after the continuous wall construction, the problem related to the intrusion of water does not occur.

本発明の第２実施例について図３を参照しながら説明する。
本実施例では、止水材４０を構成する弾性部材４１を、連壁部材１０の端部に被せることが可能な形状としている。
なお、本実施例に係る弾性部材４１は、連壁部材１０の連結後に添接板３０が干渉する箇所には設けることができない。よって、本実施例に係る弾性部材４１は、フランジ１２の端部近傍や、継手１３の部分に対して適用することが可能である。
図３に、第２実施例に係る弾性部材の一例を示す。
図３では、連壁部材１０の継手１３に取り付ける弾性部材４１ｃを、凹部４１１を設けた形状としている。
本実施例に係る構成によれば、弾性部材４１の剥離や捩れをさらに抑制することのできる止水部４０を構成することができる。 A second embodiment of the present invention will be described with reference to FIG.
In the present embodiment, the elastic member 41 constituting the water blocking material 40 is shaped so as to be able to cover the end of the connecting wall member 10.
In addition, the elastic member 41 which concerns on a present Example can not be provided in the location which the contact plate 30 interferes after connection of the connecting wall member 10. FIG. Therefore, the elastic member 41 according to the present embodiment can be applied to the vicinity of the end portion of the flange 12 and the portion of the joint 13.
FIG. 3 shows an example of the elastic member according to the second embodiment.
In FIG. 3, the elastic member 41 c attached to the joint 13 of the connecting wall member 10 has a shape provided with a recess 411.
According to the structure which concerns on a present Example, the water stop part 40 which can further suppress peeling and twist of the elastic member 41 can be comprised.

本発明の第３実施例について図４を参照しながら説明する。
本実施例では、連壁部材１０の端部に、収容空間を設け、該収容空間に弾性部材４１の一部を収容している。
図４に、第３実施例に係る収容空間の一例を示す。
図４（ａ）では、連壁部材１０の両側面に設けた張出板１４（図４（ａ））で収容空間を形成している。また、図４（ｂ）では、連壁部材１０の端面から内側に設ける溝１５（図４（ｂ））を収容空間としている。
本実施例に係る構成によれば、弾性部材４１の剥離や捩れをさらに抑制することができる止水部４０を、添接板３０と干渉することなく、連壁部材１０の端部全面に設けることができる。 A third embodiment of the present invention will be described with reference to FIG.
In the present embodiment, a housing space is provided at the end of the connecting wall member 10, and a part of the elastic member 41 is housed in the housing space.
FIG. 4 shows an example of the accommodation space according to the third embodiment.
In FIG. 4A, the overhanging plates 14 (FIG. 4A) provided on both side surfaces of the connecting wall member 10 form a housing space. Moreover, in FIG.4 (b), the groove | channel 15 (FIG.4 (b)) provided inside from the end surface of the connecting wall member 10 is made into the accommodation space.
According to the configuration according to the present embodiment, the water blocking portion 40 capable of further suppressing peeling and twisting of the elastic member 41 is provided on the entire surface of the end portion of the connecting wall member 10 without interference with the connection plate 30. be able to.

１０ 連壁部材
１１ ウェブ
１２ フランジ
１３ 継手
１４ 張出板
１５ 溝
２０ 固化体
３０ 添接板
４０ 止水部
４１ 弾性部材
４１１ 凹部
ａ 連壁部材
ｂ 固化体
ｃ 添接板
ｄ 隙間 DESCRIPTION OF REFERENCE NUMERALS 10 serial wall member 11 web 12 flange 13 joint 14 overhang plate 15 groove 20 solidified body 30 attachment plate 40 water blocking portion 41 elastic member 411 recessed portion a continuous wall member b solid body c attachment plate d gap

Claims (1)

地盤を掘削してなる掘削部に建て込んだ連壁部材を少なくとも具備する連続壁の止水構造であって、
複数の連壁部材を縦方向に連結する、添接板と、
連壁部材の縦方向の連結箇所のうち前記添接板と干渉しない位置において、連壁部材の両側面から跨ぐように配置する、一対の張出板と、
連結する連壁部材のうち、少なくとも何れか一方の連壁部材の端部に取り付ける弾性部材と、を有し、
前記一対の張出板の間に形成される収容空間に全て収容された前記弾性部材でもって止水部を形成することを特徴とする、
連続壁の止水構造。 A continuous waterstop structure comprising at least continuous wall members built in an excavating section formed by excavating the ground,
A connecting plate for longitudinally connecting a plurality of continuous wall members;
A pair of overhanging plates disposed so as to straddle from both side surfaces of the continuous wall member at positions not interfering with the contact plate among the longitudinal connection points of the continuous wall member;
An elastic member attached to an end of at least one of the connecting wall members to be connected;
A water shut-off portion is formed by the elastic member entirely accommodated in the accommodation space formed between the pair of projecting plates.
Water barrier structure of continuous wall.
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JPS55178097U (en) * 1979-06-02 1980-12-20
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