JPH0424323A - Method of building underground wall having nonuniform section - Google Patents
Method of building underground wall having nonuniform sectionInfo
- Publication number
- JPH0424323A JPH0424323A JP12530990A JP12530990A JPH0424323A JP H0424323 A JPH0424323 A JP H0424323A JP 12530990 A JP12530990 A JP 12530990A JP 12530990 A JP12530990 A JP 12530990A JP H0424323 A JPH0424323 A JP H0424323A
- Authority
- JP
- Japan
- Prior art keywords
- groove
- excavation
- wall
- side wall
- excavated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000009412 basement excavation Methods 0.000 abstract description 18
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、壁面の一部が拡幅になり剛性分布を所望に
設定できる変断面地中壁の構築方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of constructing a variable cross-section underground wall in which a portion of the wall surface is widened and the stiffness distribution can be set as desired.
（従来の技術）
従来、地中連続壁においては、壁面の一部を拡幅して壁
厚を増すことが行われている。これにより、剛性の向上
あるいは地中の障害つの回避を図るものであり、そうし
たいわゆる変断面地中壁の構築方法は、例えば特開平１
−３１００１１号などの公報に見られるようにすでに公
知となっている。(Prior Art) Conventionally, in an underground continuous wall, a part of the wall surface is widened to increase the wall thickness. This is intended to improve rigidity or avoid underground obstacles, and such a method of constructing a so-called variable cross-section underground wall is described in, for example, Japanese Patent Application Laid-Open No.
This is already known as seen in publications such as No.-310011.
（発明が解決しようとする課題）
しかしながら、拡幅部位の掘削は側壁面の掘削となるこ
とから、掘削の反力を支持するガイド部材が必要となり
、大きな剛性を得るために拡幅量を大きくすると、それ
に伴い大きな（強い）ガイド部材の設置が必要となる。(Problems to be Solved by the Invention) However, since excavation of the widened area involves excavation of the side wall surface, a guide member is required to support the reaction force of the excavation, and if the width is increased in order to obtain large rigidity, Accordingly, it becomes necessary to install a large (strong) guide member.
掘削機の駆動力も大きなものが必要となるため、作業が
煩雑かつ大型となり、コスト高となる。Since the excavator requires a large driving force, the work becomes complicated and large, resulting in high costs.
この発明は上記のような背景に鑑みてなされたものであ
り、ガイド部材等を要せずに小さな掘削力で拡幅部位の
掘削を行える変断面地中壁の構築方法の提供をその目的
とする。This invention has been made in view of the above background, and its purpose is to provide a method for constructing a variable cross-section underground wall that allows excavation of a widened section with a small excavation force without the need for a guide member or the like. .
（課題を解決するための手段）
上記目的を達成するため、この発明は、壁面の一部が拡
幅になる変断面地中壁の構築に際し、まず溝の掘削を行
い、この溝の所定深度部位の側壁を浅く削ると共に、こ
れを適宜繰り返して所定幅の拡幅部位になし、その後コ
ンクリートの打設を行うことを特徴とする。(Means for Solving the Problems) In order to achieve the above object, the present invention first excavates a trench when constructing a variable section underground wall in which a part of the wall surface is widened, and a predetermined depth of the trench is constructed. It is characterized by shallowly carving the side wall of the pipe, repeating this process as necessary to create a widened part of a predetermined width, and then pouring concrete.
（作 用）
以上のような方法によれば、溝の所定深度部位の側壁を
浅く削ることをくり返すことで拡幅部位の掘削が行なえ
る。従って、たとえ大きな掘削幅を要する場合であって
も小さな掘削力で作業が行なえる。(Function) According to the method described above, by repeatedly cutting shallowly the side wall of the trench at a predetermined depth, the widening region can be excavated. Therefore, even if a large excavation width is required, the work can be performed with a small excavation force.
（実施例）
以下、この発明の実施例を添付図面を参照しながら説明
する。(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
第１図〜第６図は、本発明による変断面地中壁の構築方
法の好適な一実施例における各工程を順に示す断面図で
ある。なお、第１図（Ａ）と第１図（Ｂ）とは同一工程
を示すものの切断面が互いに９０度異なる断面図である
。1 to 6 are cross-sectional views sequentially showing each step in a preferred embodiment of the method for constructing a variable-section underground wall according to the present invention. Note that FIG. 1(A) and FIG. 1(B) are cross-sectional views showing the same process, but the cut planes are different from each other by 90 degrees.
壁面の一部が拡幅になる変断面地中壁の構築においては
、まず溝１の掘削を行う（第１図）。すなわち、カッタ
ードラムを先端に有するハイドロフレーズ機などの掘削
機２をクレーン３等により吊降して溝１の掘削を行うが
、このとき再開発等のため旧建物の蓋体を先行しなけれ
ばならない場合には、第７図に示すように旧建物の地下
外壁４を撤去せずに残し、その地下外壁４の内側に新た
な溝１を掘削する。これにより地下外壁４を掘削時の山
止め壁として機能させることができる。また、溝１内に
は側壁の崩壊を防止するためのポリマーなどの安定液５
を充満させる。When constructing a variable cross-section underground wall where part of the wall surface is widened, trench 1 is first excavated (Figure 1). That is, an excavator 2 such as a hydrophrase machine having a cutter drum at the tip is suspended by a crane 3 or the like to excavate a trench 1, but at this time, the lid of the old building must be removed first for redevelopment etc. If this is not possible, as shown in FIG. 7, the underground outer wall 4 of the old building is left without being removed, and a new trench 1 is excavated inside the underground outer wall 4. This allows the underground outer wall 4 to function as a retaining wall during excavation. In addition, a stabilizing liquid 5 such as a polymer is contained in the groove 1 to prevent the side wall from collapsing.
to fill up.
溝１の標準断面部分の掘削が完了した後、その溝１の所
定深度部位の側壁を浅く削ると共に（第２図）、これを
適宜くり返して所定幅の拡幅部位６になす（第３図）。After completing the excavation of the standard cross-section portion of the groove 1, the side wall of the groove 1 at a predetermined depth is shallowly cut (Fig. 2), and this is repeated as appropriate to form a widened portion 6 of a predetermined width (Fig. 3). .
本実施例では、掘削機２の側部から適宜に伸展される変
断面用カッター２０を用いて側壁の掘削を建物外方に向
って行い、拡幅部位６を形成することにしているが、他
の掘削手段によってももちろんかまわない。In this embodiment, the side wall is excavated toward the outside of the building using the cutter 20 for variable cross-section extended from the side of the excavator 2 as appropriate to form the widened area 6. Of course, it does not matter if the excavation method is used as well.
次に予め組立てた鉄筋能７を溝１内に吊降す（第４図）
。この鉄筋能７には溝１の拡幅部位６に係合する展開部
７０が備えてあり、鉄筋能７を溝１内に挿入後、伸展ワ
イヤ７１を引いて展開部７０を伸展し、これを拡幅部位
６に係合させて配筋を施す（第５図）。Next, the pre-assembled reinforcing bar 7 is suspended into the groove 1 (Fig. 4)
. This reinforcing bar 7 is provided with a developing part 70 that engages with the widened part 6 of the groove 1. After inserting the reinforcing bar 7 into the groove 1, the expanding part 70 is extended by pulling the extension wire 71, and the expanding part 70 is expanded. Reinforcement is applied by engaging the widened portion 6 (Fig. 5).
この後、溝１内の鉄筋能７にトレミ管８を挿入すると共
に、このトレミ管８から生コンクリート９を脱せしく第
６図）、施工を完了する。Thereafter, the reinforcing pipe 8 is inserted into the reinforcing bar 7 in the groove 1, and the ready-mixed concrete 9 is removed from the reinforcing pipe 8 (Fig. 6), completing the construction.
これにより、第７図および第８図に示すような変断面地
中壁１０が完成になり、図中の１１は止水層である。As a result, the variable cross-section underground wall 10 as shown in FIGS. 7 and 8 is completed, and 11 in the figure is a water stop layer.
すなわち、このような方法によれば、溝１の所定深度部
位の側壁を浅く削ることをくり返すことで拡幅部位６の
掘削が行なえる。従って、くり返し行う一回の掘削では
浅く削るので小さな掘削力でも充分であり、このように
掘削力が小さいので反力も弱く、その反力を支持するた
めのガイド部材を要しない。That is, according to such a method, the widened portion 6 can be excavated by repeatedly cutting shallowly the side wall of the groove 1 at a predetermined depth portion. Therefore, in one repeated excavation, a small excavation force is sufficient because the excavation is performed shallowly, and since the excavation force is small, the reaction force is also weak, and no guide member is required to support the reaction force.
（発明の効果）
以上、実施例で詳細に説明したように、この発明にかか
る変断面地中壁の構築方法によれば、浅く削ることをく
り返すことで拡幅部位の掘削がなる。このため掘削の反
力を支持するためのガイド部材等を要せずに小さな掘削
力で拡幅部位の掘削を行なえる。(Effects of the Invention) As described above in detail in the embodiments, according to the method for constructing a variable cross-section underground wall according to the present invention, the widening portion can be excavated by repeatedly cutting shallowly. Therefore, the widened area can be excavated with a small excavation force without requiring a guide member or the like to support the reaction force of excavation.
第１図〜第６図は本発明の一実施例における各工程を順
に示す断面図、第７図は本発明方法により施工した変断
面地中壁を示す断面図、第８図はその斜視図である。
１・・・・・・溝
６・・・・・・拡幅部位
７・・・・・・鉄筋能
９・・・・・・コンクリート
１０・・・変断面地中壁
７０・・・展開部
（生フンクリ
ート）Figures 1 to 6 are cross-sectional views sequentially showing each step in an embodiment of the present invention, Figure 7 is a cross-sectional view showing a variable cross-section underground wall constructed by the method of the present invention, and Figure 8 is a perspective view thereof. It is. 1... Groove 6... Widening section 7... Reinforcement capacity 9... Concrete 10... Variable section underground wall 70... Development section ( raw funcrete)
Claims (1)
ず溝の掘削を行い、該溝の所定深度部位の側壁を浅く削
ると共に、これを適宜繰り返して所定幅の拡幅部位にな
し、その後コンクリートの打設を行うことを特徴とする
変断面地中壁の構築方法。When constructing a variable cross-section underground wall where a part of the wall surface is widened, first excavate a trench, then shallowly cut the side wall at a predetermined depth part of the trench, and repeat this as appropriate to make the widened part to a predetermined width. A method for constructing a variable cross-section underground wall, which comprises subsequently placing concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2125309A JP2515038B2 (en) | 1990-05-17 | 1990-05-17 | Construction method of underground wall with variable cross section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2125309A JP2515038B2 (en) | 1990-05-17 | 1990-05-17 | Construction method of underground wall with variable cross section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0424323A true JPH0424323A (en) | 1992-01-28 |
| JP2515038B2 JP2515038B2 (en) | 1996-07-10 |
Family
ID=14906915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2125309A Expired - Lifetime JP2515038B2 (en) | 1990-05-17 | 1990-05-17 | Construction method of underground wall with variable cross section |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2515038B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04319114A (en) * | 1991-04-19 | 1992-11-10 | Kumagai Gumi Co Ltd | Construction of continuous underground wall |
-
1990
- 1990-05-17 JP JP2125309A patent/JP2515038B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04319114A (en) * | 1991-04-19 | 1992-11-10 | Kumagai Gumi Co Ltd | Construction of continuous underground wall |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2515038B2 (en) | 1996-07-10 |
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