JPH0472927B2 - - Google Patents
Info
- Publication number
- JPH0472927B2 JPH0472927B2 JP60031450A JP3145085A JPH0472927B2 JP H0472927 B2 JPH0472927 B2 JP H0472927B2 JP 60031450 A JP60031450 A JP 60031450A JP 3145085 A JP3145085 A JP 3145085A JP H0472927 B2 JPH0472927 B2 JP H0472927B2
- Authority
- JP
- Japan
- Prior art keywords
- earth retaining
- retaining walls
- retaining wall
- earth
- construction
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 18
- 238000010276 construction Methods 0.000 claims description 16
- 239000004567 concrete Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Description
【発明の詳細な説明】
≪産業上の利用分野≫
この発明は土留壁の構築方法に関し、特に、コ
ンクリートにより形成される単位パネルを連設し
て構築する土留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 for constructing an earth retaining wall, and particularly relates to a method for constructing an earth retaining wall by connecting unit panels made of concrete.
≪従来技術と問題点≫
周知のように、地下構造物の構築工法の一種と
して土留開削工法がある。<<Prior Art and Problems>> As is well known, there is an earth retaining cut-and-cover method as a type of construction method for underground structures.
土留開削工法は、一般的に地上から所定の間隔
を置いて連壁工法などで平行な細幅溝孔を掘削し
鉄筋コンクリートで土留壁を構築した後、土留壁
間に適宜切梁を設けながらその間を掘削し、内部
に地下構造物を形成した後、埋め戻しを行なう工
法である。 The earth retaining open and cut method generally involves excavating parallel narrow trenches at predetermined intervals from the ground using the continuous wall construction method, constructing earth retaining walls with reinforced concrete, and then constructing appropriate struts between the earth retaining walls. This method involves excavating the ground, forming an underground structure inside it, and then backfilling it.
ところで、掘削地盤が自立性に乏しい場合や、
地下水位が高い場合など、地盤の性状が不安定な
時には、平面形状が矩形の平行な土留壁では断面
剛性が低く、周囲の地盤に振動、変位などの悪影
響を及ぼす。 By the way, in cases where the excavated ground lacks self-sustainability,
When the ground is unstable, such as when the groundwater level is high, parallel earth retaining walls with a rectangular planar shape have low cross-sectional rigidity, which can adversely affect the surrounding ground, such as vibration and displacement.
そこで、従来はこのような問題を解決するため
に、土留壁を構築する地盤自体の性状を改良する
地盤改良方法と、土留壁の剛性を増強する方法で
対処していた。 Conventionally, these problems have been solved by ground improvement methods that improve the properties of the ground itself on which retaining walls are built, and by methods that increase the rigidity of retaining walls.
しかしながら、地盤改良方法では、土留壁を掘
削土とモルタルを混合処理して構築し、その外周
囲に砂杭を形成して地盤の圧密沈下を促進するな
ど、複数の工法を併用しているが、土留壁自体の
剛性を大幅に増強することができず、工事が複雑
になるという問題もあつた。 However, ground improvement methods use multiple construction methods, such as constructing retaining walls by mixing excavated soil and mortar, and forming sand piles around the outside to promote consolidation and settlement of the ground. However, there was also the problem that it was not possible to significantly increase the rigidity of the retaining wall itself, making the construction work complicated.
一方、土留壁の剛性を増強する方法は、例えば
土留壁の内部にＨ鋼や鋼管などの鋼杭を柱列状に
埋設することになるが、通常土留壁が埋殺しにな
るため経済的損失が大きすぎる。 On the other hand, a method to increase the rigidity of an earth retaining wall is to bury steel piles such as H steel or steel pipes in columns inside the earth retaining wall, but usually the earth retaining wall is buried, resulting in an economic loss. is too big.
この発明は、上述した従来の問題点に鑑みてな
されたものであつて、その目的とするところは、
工事の複雑化を伴わず、土留壁自体の剛性を大き
く増強できる経済的な土留壁の構築方法を提供す
ることにある。 This invention has been made in view of the above-mentioned conventional problems, and its purpose is to:
An object of the present invention is to provide an economical method for constructing an earth retaining wall that can greatly increase the rigidity of the earth retaining wall itself without complicating the construction.
≪問題点を解決するための手段≫
上記目的を達成するために、この発明の土留壁
の構築方法は、地中に掘削した細幅溝にコンクリ
ートを打設することにより形成した単位パネルを
連設して一対の土留壁を構築し、該一対の土留壁
の間に梁を設置する土留壁の構築方法において、
前記単位パネルを凹凸状に、かつ一対の土留壁に
おける該凹凸形状が略線対称となるように連設
し、対向する凹凸形状の凸部間に梁を設置するこ
とを特徴とする。<Means for Solving the Problems> In order to achieve the above object, the earth retaining wall construction method of the present invention connects unit panels formed by pouring concrete into narrow trenches excavated underground. In a method of constructing an earth retaining wall in which a pair of earth retaining walls is constructed by installing a beam, and a beam is installed between the pair of earth retaining walls,
It is characterized in that the unit panels are arranged in a concave-convex shape and the concave-convex shapes of a pair of retaining walls are arranged in series so that they are approximately line symmetrical, and a beam is installed between the opposing convex portions of the concave-convex shapes.
≪実施例≫
以下、この発明の好適な実施例について添附図
面を参照にして詳細に説明する。<<Example>> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
第１図および第２図は、この発明に係る開削工
法における土留壁の構築方法の一実施例を示して
いる。 FIGS. 1 and 2 show an embodiment of a method for constructing an earth retaining wall using the cut-and-cover construction method according to the present invention.
同図に示す構築方法は、地上から所定の間隔を
置いて土留壁１０，１０を構築した後、この土留
壁１０〜１０間を掘削し、掘削した部分に地下坑
道１２を構築した後、埋め戻しを行なう開削工法
に適用されるものであつて、以下に示す特徴を有
する。 The construction method shown in the figure is to construct earth retaining walls 10, 10 at a predetermined interval from the ground, excavate between these earth retaining walls 10 and 10, construct an underground tunnel 12 in the excavated part, and then fill it with dirt. It is applied to the cut-and-cover method that performs back-cutting, and has the following characteristics.
すなわち、土留壁１０，１０は、第２図にその
平面形状を示す如く、地山１４側に突出するＵ字
ユニツト１６を横方向に連ねた概略波形断面に形
成されている。 That is, the retaining walls 10, 10, as shown in a plan view in FIG. 2, are formed in a generally corrugated cross section in which U-shaped units 16 protruding toward the earth 14 are laterally connected.
土留壁１０は連続地中壁工法で以下に示す工程
で構築する。 The earth retaining wall 10 is constructed using the continuous underground wall construction method in the following steps.
まず、Ｕ字ユニツト１６の一方の側面となる単
位パネルとしての第１パネル１６ａを、溝孔の下
端が地盤中の支持層上限面１８から以深になるよ
うに泥水を充満して掘削した後、鉄筋籠を建込
み、泥水をコンクリートで置換し、コンクリート
を硬化させて形成する。 First, the first panel 16a as a unit panel that forms one side of the U-shaped unit 16 is filled with muddy water and excavated so that the lower end of the groove is deeper than the upper limit surface 18 of the support layer in the ground. A steel cage is erected, muddy water is replaced with concrete, and the concrete is hardened.
次いで、Ｕ字ユニツト１６の他方の側面となる
第２パネル１６ｂを、第１パネル１６ａと同様に
鉄筋コンクリートで形成する。 Next, the second panel 16b, which forms the other side of the U-shaped unit 16, is made of reinforced concrete in the same manner as the first panel 16a.
しかる後、Ｕ字ユニツト１６の底面となる第３
パネル１６ｃを、一端が第１パネル１６ａの端縁
と、また、他端が第２パネル１６ｂの端縁と部分
的にそれぞれ重なるようにして、連結形成する。 After that, the third
The panel 16c is connected so that one end partially overlaps the edge of the first panel 16a and the other end partially overlaps the edge of the second panel 16b.
そして、順次Ｕ字ユニツト１６を横方向に連結
して線対称となる所定長の一対の土留壁１０，１
０とする。 Then, the U-shaped units 16 are successively connected in the horizontal direction to form a pair of retaining walls 10 and 1 of a predetermined length that are line symmetrical.
Set to 0.
なお、第２図に示すようにこの実施例では、各
Ｕ字ユニツト１６間が、密接状態で連結されてい
るが、これを相互にオーバーラツプするようにし
て形成してもよい。 In this embodiment, the U-shaped units 16 are closely connected as shown in FIG. 2, but they may be formed so as to overlap each other.
土留壁１０，１０の構築が終了すると、土留壁
１０−１０間を掘削することになるが、この掘削
時に設けられる切梁２０は、第２図に示すよう
に、Ｕ字ユニツト１６の接続部、つまり、波形土
留壁１０が内方に突出した凸部間に設置する。こ
のことにより、切梁２０が最短となるようその長
さを減少することができるとともに、ユニツト１
６，１６間の接続部分を効果的に補強できる。 When the construction of the earth retaining walls 10, 10 is completed, excavation will be carried out between the earth retaining walls 10 and 10, and the strut 20 installed during this excavation will be connected to the connection part of the U-shaped unit 16, as shown in FIG. That is, the corrugated earth retaining wall 10 is installed between the convex portions that protrude inward. This makes it possible to reduce the length of the strut 20 to the shortest possible length, and also allows the unit 1
The connecting portion between 6 and 16 can be effectively reinforced.
また、掘削に先立ち土留壁１０，１０の上端間
には繋梁２２を架設してこれと土留壁１０，１０
とで断面が門型のラーメン構造とする。 In addition, prior to excavation, a connecting beam 22 is erected between the upper ends of the earth retaining walls 10, 10, and this and the earth retaining walls 10, 10 are connected to each other.
It has a rigid frame structure with a gate-shaped cross section.
さて、上述した構成からなる本発明の土留壁の
構築方法によれば、土留壁１０，１０の断面形状
が概略波形の凹凸形状となつていて、土留壁１０
に作用する土、水圧などの水平荷重に対して強固
に対抗でき、剛性を大幅に増強できる。 Now, according to the earth retaining wall construction method of the present invention having the above-mentioned configuration, the cross-sectional shape of the earth retaining walls 10, 10 has a generally corrugated uneven shape, and the earth retaining walls 10, 10 have an uneven shape.
It can strongly withstand horizontal loads such as soil and water pressure that act on the surface, and its rigidity can be significantly increased.
従つて、自立性の乏しい地盤であつても、従来
のように地盤改良などの他の補強方法が不用とな
り、周囲の地盤に悪影響を及ぼすこともなくな
る。 Therefore, even if the ground is poorly self-supporting, other reinforcement methods such as ground improvement as in the past are not necessary, and there is no negative impact on the surrounding ground.
また、土留壁１０，１０を形成する単位パネル
の施工技術は、従来の連続地中壁の延長上にあつ
て、施工実績が多く、管理が容易で、且つ高い止
水効果を得られる。 Moreover, the construction technology of the unit panels forming the earth retaining walls 10, 10 is an extension of the conventional continuous underground wall, has a large construction record, is easy to manage, and can obtain a high water-stopping effect.
さらに、土留壁１０，１０上端に繋梁２２を設
けて門型ラーメン構造とすれば、ラーメンを支え
る土留壁１０，１０の剛性が大きいため、構造的
に極めて安定したものとなり、工事の安全性が向
上するとともに、地下坑道１２の完成後も偏圧や
地震動に対して防護壁としても機能しより安全と
なる。 Furthermore, if a connecting beam 22 is provided at the upper end of the earth retaining walls 10, 10 to form a gate-shaped rigid-frame structure, the rigidity of the earth-retaining walls 10, 10 supporting the rigid frames is large, resulting in extremely stable structure, which improves construction safety. In addition, even after the underground tunnel 12 is completed, it functions as a protective wall against uneven pressure and seismic motion, making it safer.
さらにまた、凹凸形状にすることによつて生じ
る土留壁の施工延長の増加分は、梁の長さの減少
及び土留壁自体の剛性の増加の伴なう梁の本数の
減少によつて補うことができる。 Furthermore, the increase in the construction length of the retaining wall due to the uneven shape can be compensated for by reducing the number of beams due to a decrease in the length of the beam and an increase in the rigidity of the retaining wall itself. I can do it.
第３図はこの発明の他の実施例を示しており、
以下にその特徴点についてのみ説明する。 FIG. 3 shows another embodiment of the invention,
Only the characteristic points will be explained below.
すなわち、この実施例では、土留壁１０の各パ
ネル３０，３０を、中心軸に対して約45度の角度
で形成し、全体として平面形状が三角波形断面と
なるように形成している。 That is, in this embodiment, each panel 30, 30 of the earth retaining wall 10 is formed at an angle of about 45 degrees with respect to the central axis, and the planar shape as a whole is formed to have a triangular wave-shaped cross section.
この場合も切梁２０は、波形土留壁１０が内方
に突出した部分に設置する。 In this case as well, the strut 20 is installed at the part where the corrugated earth retaining wall 10 projects inward.
以上のように構成された土留壁１０によつて
も、上記実施例と同じような作用効果が得られ
る。 With the earth retaining wall 10 configured as described above, the same effects as in the above embodiment can be obtained.
なお、本発明者らは、第３図の実施例で示す土
留壁１０を、壁厚Ｗが600mm、山の高さＨを1700
mmとし、波ピツチＴを５ｍにして構築したとこ
ろ、同じ壁厚の矩形状の平行な土留壁に比べ約６
倍の断面剛性が得られることを確認した。 The present inventors constructed the earth retaining wall 10 shown in the embodiment shown in FIG. 3 with a wall thickness W of 600 mm and a mountain height H of 1700 mm.
When constructed with a wave pitch T of 5 m and a wave pitch T of 5 m, it was found that the wall thickness was approximately 6.
It was confirmed that double the cross-sectional stiffness can be obtained.
≪発明の効果≫
以上、実施例で詳細に説明したように、本発明
の土留壁の構築方法は、土留壁自体の剛性を大き
くするとともに、梁の本数を減少しかつその長さ
を短縮して、強固な土留壁を経済的かつ容易に構
築することができるという格別の効果を奏するも
のである。<<Effects of the Invention>> As explained above in detail in the examples, the method for constructing an earth retaining wall of the present invention increases the rigidity of the earth retaining wall itself, reduces the number of beams, and shortens the length thereof. This has the special effect of making it possible to construct strong earth retaining walls economically and easily.
第１図および第２図はこの方法発明の一実施例
を示しており、第１図は縦断面図、第２図はその
平面図である。第３図はこの方法発明の他の実施
例を示す平面図である。
１０……土留壁、１２……地下坑道、１４……
地山、１６……Ｕ字ユニツト、１８……支持層上
限面、２０……切梁、２２……繋梁、３０……パ
ネル。
1 and 2 show an embodiment of this method invention, with FIG. 1 being a longitudinal sectional view and FIG. 2 being a plan view thereof. FIG. 3 is a plan view showing another embodiment of this method invention. 10... Retaining wall, 12... Underground tunnel, 14...
Earth, 16...U-shaped unit, 18... Upper limit surface of support layer, 20... Stray beam, 22... Connecting beam, 30... Panel.
Claims (1)
することにより形成した単位パネルを連設して一
対の土留壁を構築し、該一対の土留壁の間に梁を
設置する土留壁の構築方法において、前記単位パ
ネルを凹凸状に、かつ一対の土留壁における該凹
凸形状が略線対称となるように連設し、対向する
凹凸形状の凸部間に梁を設置することを特徴とす
る土留壁の構築方法。1 Construction of earth retaining walls by constructing a pair of earth retaining walls by connecting unit panels formed by pouring concrete into narrow trenches excavated underground, and installing beams between the pair of earth retaining walls. The method is characterized in that the unit panels are arranged consecutively in an uneven shape and the uneven shapes on a pair of retaining walls are approximately line symmetrical, and a beam is installed between the opposing convex portions of the uneven shapes. How to construct an earth retaining wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3145085A JPS61191716A (en) | 1985-02-21 | 1985-02-21 | Method of building sheathing wall in open excavating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3145085A JPS61191716A (en) | 1985-02-21 | 1985-02-21 | Method of building sheathing wall in open excavating process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61191716A JPS61191716A (en) | 1986-08-26 |
| JPH0472927B2 true JPH0472927B2 (en) | 1992-11-19 |
Family
ID=12331588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3145085A Granted JPS61191716A (en) | 1985-02-21 | 1985-02-21 | Method of building sheathing wall in open excavating process |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61191716A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2780424A1 (en) * | 1998-06-29 | 1999-12-31 | Bouygues Sa | Vertical reinforced concrete wall cast in situ in ground |
| JP7427945B2 (en) * | 2019-12-09 | 2024-02-06 | 株式会社大林組 | Wall-like structure and method for constructing wall-like structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5172121A (en) * | 1974-12-19 | 1976-06-22 | Koichi Uemura | CHICHURENZOKUHEKIKO CHIKUHOHO |
-
1985
- 1985-02-21 JP JP3145085A patent/JPS61191716A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5172121A (en) * | 1974-12-19 | 1976-06-22 | Koichi Uemura | CHICHURENZOKUHEKIKO CHIKUHOHO |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61191716A (en) | 1986-08-26 |
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