JPS63176530A - Construction of foundation of underground continuous wall - Google Patents
Construction of foundation of underground continuous wallInfo
- Publication number
- JPS63176530A JPS63176530A JP776387A JP776387A JPS63176530A JP S63176530 A JPS63176530 A JP S63176530A JP 776387 A JP776387 A JP 776387A JP 776387 A JP776387 A JP 776387A JP S63176530 A JPS63176530 A JP S63176530A
- Authority
- JP
- Japan
- Prior art keywords
- underground continuous
- continuous wall
- earth retaining
- constructing
- wall
- 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
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 239000004567 concrete Substances 0.000 claims abstract description 6
- 239000002689 soil Substances 0.000 claims description 5
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 239000011150 reinforced concrete Substances 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 abstract description 7
- 230000010485 coping Effects 0.000 abstract 2
- 239000004575 stone Substances 0.000 abstract 2
- 239000004848 polyfunctional curative Substances 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Foundations (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は土木関係では鉄道、橋梁、もしくは各種プラ
ント、その他の構造物の基礎、建築関係では高層ビル、
原子力関係建物、もしくは塔体等の基礎となる地中連続
壁基礎の施工法に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to foundations of railways, bridges, various plants, and other structures in the civil engineering field, and high-rise buildings,
This article relates to construction methods for underground continuous wall foundations, which serve as the foundation for nuclear power-related buildings or tower bodies.
地中連続壁基礎の頂版部を施工する場合は、地中連続壁
頭部を研り出し、頂版部のコンクリートを打設している
。この頂版が、地盤面より下方にある場合、頂版下端ま
で掘削する必要がある。この掘削時の土留および止水に
対して、従来は土留材を建込み、切梁、火打ち等により
頂版まで掘削している。When constructing the top slab of an underground wall foundation, the head of the underground wall is polished and concrete is poured for the top slab. If this top slab is below the ground level, it is necessary to excavate to the bottom of the top slab. Conventionally, earth retaining materials are built in to prevent earth retention and water stoppage during excavation, and excavation is carried out to the top slab using struts, flints, etc.
また、特公昭５９−４９９７３号公報および特公昭５９
−４９９７４号公報記載の橋台、橋脚等の基礎の施工方
法では、頂版位置下端まで掘削した掘削溝の外側内壁面
にＵ型シートパイル等の土留材を建込み、さらに下方へ
掘削して地中連続壁を施工し、土留材で囲まれた部分を
切梁を設けながら開削し、頂版の施工を行なっている。Also, Japanese Patent Publication No. 59-49973 and Special Publication No. 59-49973
In the construction method for foundations such as bridge abutments and piers described in Publication No. 49974, earth retaining materials such as U-shaped sheet piles are erected on the outside inner wall surface of the excavated trench that has been excavated to the lower end of the top slab position, and then excavated further downward to ground the foundation. A middle continuous wall was constructed, and the area surrounded by earth retaining material was excavated while installing cut beams, and the top slab was constructed.
上述の施工方法では頂版の施工時にＵ型シートパイル等
の土留材が地中連続壁の断面の中に入り込むため地中連
続壁および頂版に断面欠損が生ずる。また、断面欠損を
少なくするために、剛性の低い土留材を使用し、切梁を
必要とするため、切梁が狭い空間での開削の邪魔になる
。In the above-mentioned construction method, when constructing the top slab, earth retaining materials such as U-shaped sheet piles enter the cross section of the underground continuous wall, resulting in cross-sectional defects in the underground continuous wall and the top slab. In addition, in order to reduce cross-sectional defects, earth retaining materials with low rigidity are used and struts are required, so the struts get in the way of excavation in narrow spaces.
また、切梁の設置に手間がかかる。さらに土留材はＵ型
シートパイル等を用い、連続させる必要があるが、比較
的良質な地盤では経済的に無駄が生じる場合もある。Additionally, installing the struts is time-consuming. Furthermore, it is necessary to use U-shaped sheet piles or the like as earth retaining materials and to make them continuous, but this may be economically wasteful if the ground is of relatively good quality.
この発明は上述のような従来技術における問題点の解決
を図ったものである。This invention aims to solve the problems in the prior art as described above.
以下に、この発明の概要を実施例に対応する図面の符号
を用いて説明する。An overview of the present invention will be explained below using reference numerals in the drawings corresponding to the embodiments.
この発明は地中連続壁基礎として、頂部の頂版２を地盤
面より下方に設ける場合に利用し、次のような手順で施
工を行なう。This invention is used as an underground continuous wall foundation when the top plate 2 at the top is installed below the ground level, and the construction is carried out according to the following procedure.
■ まず、地中連続壁１の施工予定位置より外側にＨ形
鋼または鋼矢板または鋼管杭、ＲＣ抗等の土留材３を施
工する。軟弱地盤の場合は予めソイルモルタル壁５を施
工するなどして、後述の開削時における土圧、水圧に十
分耐えられるようにする。土留材３は地盤面から頂版２
伎置より下方に達するものとし、必ずしも連続させる必
要はなく、所要間隔をおいて、必要な数だけ用いる。■ First, earth retaining material 3 such as H-beam steel, steel sheet piles, steel pipe piles, RC columns, etc. is constructed outside the planned construction location of underground continuous wall 1. In the case of soft ground, a soil mortar wall 5 is constructed in advance so that it can sufficiently withstand the earth pressure and water pressure during excavation, which will be described later. Earth retaining material 3 is installed from the ground surface to the top plate 2
They should reach below the kiosho, and they do not necessarily have to be continuous, but should be used as many times as necessary at the required intervals.
■ 次に、地盤面位置において、土留材３の頭部を連結
し、かつ地中連続壁１のガイドウオールを兼ねる笠石４
を施工する。この笠石４は現場打ちコンクリートあるい
は鋼製またはＲＣ製のプレキャスト部材等からなる。■ Next, at the ground level, a capstone 4 connects the head of the earth retaining material 3 and also serves as a guide wall for the underground continuous wall 1.
construction. This capstone 4 is made of cast-in-place concrete or a precast member made of steel or RC.
■ 土留材３で囲まれた内側に、地中連続壁１を施工す
る。地中連続壁１の施工は安定液を用いるなどして、通
常の方法で行なうことができる。施工深度は地盤の条件
や上部構造物に応じて決まり、頂部は頂版２伎置までと
する。■ Construct underground continuous wall 1 inside surrounded by earth retaining material 3. Construction of the underground continuous wall 1 can be carried out by a normal method, such as by using a stabilizing liquid. The construction depth will be determined depending on the ground conditions and the superstructure, and the maximum depth at the top will be 2.
■ 土留材３で囲まれた内側を頂版２泣置下端まで開削
する。土留材３は頭部が笠石４によって拘束され、下端
内側は地中連続壁１により変位が制限されており、切梁
は設ける必要かない。■ Excavate the inside surrounded by earth retaining material 3 to the lower end of the top plate 2. The head of the earth retaining material 3 is restrained by the capstone 4, and the displacement of the inside of the lower end is restricted by the underground continuous wall 1, so there is no need to provide struts.
■ 頂版２を施工し、地中連続壁１の頂部に一体化する
。この後、頂版２上には橋脚９、その他の構造物下部が
構築され、開削部分８は埋め戻される
〔実施例〕
次に、図示した実施例について説明する。■ Construct the top slab 2 and integrate it with the top of the underground continuous wall 1. Thereafter, the pier 9 and other lower parts of the structure are constructed on the top slab 2, and the excavated portion 8 is backfilled. [Example] Next, the illustrated example will be described.
第１図〜第５図はこの発明の一実施例における施工手順
を示したものである。1 to 5 show the construction procedure in an embodiment of the present invention.
まず、基礎の地中連続壁１の施工位置の両側を、例えば
ソイルオーガー等で、セメント等の固化剤を混ぜながら
地盤改良する（第１図（ａ）。First, the ground is improved on both sides of the construction location of the underground continuous wall 1 of the foundation, using a soil auger or the like, while mixing a solidifying agent such as cement (Fig. 1 (a)).
（ｂ）参照）。(see (b)).
ソイルモルタルが固化しないうちに、例えばＨ形鋼のよ
うな土留材３を垂直精度良く建て込む（第２図（ａ）、
（ｂ）参照）。Before the soil mortar hardens, install the earth retaining material 3, such as H-shaped steel, with good vertical accuracy (Fig. 2 (a),
(see (b)).
次に、土留材３の頭部が埋まるように、地中連続壁工法
におけるガイドウオールのコンクリートを打設する。外
側のガイドウオールは土留材３の笠石４を兼ねる（第３
図（ａ）、 （ｂ）参照）。Next, concrete for the guide wall in the underground wall construction method is poured so that the head of the earth retaining material 3 is buried. The outer guide wall also serves as the capstone 4 of the earth retaining material 3 (the third
(See Figures (a) and (b)).
ガイドウオール４，６を基準に地中連続壁１を施工する
。この際、コンクリートの打設高さは頂版２を施工する
開削面の高さ付近で打ち止める（第４図（ａ）、 （ｂ
）参照）。The underground continuous wall 1 is constructed based on the guide walls 4 and 6. At this time, the concrete placement height is stopped near the height of the excavated surface where the top slab 2 is to be constructed (Fig. 4 (a), (b)
)reference).
頂版施工のための開削をする。鉄骨あるいは鉄筋コンク
リートで頂版２の施工をした後、橋脚９や機械基礎を施
工し、埋戻す（第５図参照）埋戻しの際、笠石４は撤去
するが、土留材３は例えば予め剥離材等を塗布しておく
ことにより、引抜き回収も可能である。Excavation will be made for the construction of the top slab. After constructing the top slab 2 with steel frame or reinforced concrete, construct the piers 9 and machine foundations and backfill (see Figure 5).When backfilling, the capstone 4 is removed, but the earth retaining material 3 is made of peeling material in advance, for example. It is also possible to pull it out and collect it by applying the same.
第６図〜第９図は他の実施例として地盤改良を行なわな
い場合の例を示したもので、次のような手順で施工を行
なう。FIGS. 6 to 9 show other embodiments in which no ground improvement is performed, and the construction is carried out in the following procedure.
まず、鋼矢板等の土留材３°を施工する（第６図（ａ）
、 （ｂ）参照）。地盤が良質で、強度が大きい場合は
Ｈ形鋼等を所要間隔をおいて施工してもよい。First, install earth retaining materials such as steel sheet piles at 3° (Fig. 6 (a)
, see (b)). If the ground is of good quality and strong, H-beams etc. may be constructed at required intervals.
土留材３°の頭部に外側のガイドウオールを兼ねて笠石
４°を施工する（第７図参照）。図中６′は内側のガイ
ドウオールである。A 4° capstone is installed at the head of the 3° retaining material to serve as an outer guide wall (see Figure 7). In the figure, 6' is an inner guide wall.
土留材３゛に近接して地中連続壁１を頂版２の高さまで
施工する（第８図参照）。Construct an underground wall 1 close to the earth retaining material 3' up to the height of the top slab 2 (see Figure 8).
地中連続壁１の施工後、土留材３゛の内部を開削し、頂
版２を施工する。After constructing the underground continuous wall 1, excavate the inside of the earth retaining material 3' and construct the top slab 2.
〔発明の効果］
土留材の頭部をガイドウオールを兼ねた笠石。で拘束す
ることにより、頂版部開削時に切梁が不要となり、経済
的である。また切梁がないため掘削の邪魔にならない。[Effects of the invention] A capstone whose head of earth retaining material also serves as a guide wall. By restraining with , no cutting beam is required when excavating the top slab, which is economical. Also, since there are no struts, it does not get in the way of excavation.
また土留材下端は地中連続壁頭部で変位が拘束されるた
め、土留材の根入れ深さも短くできる。In addition, since the displacement of the lower end of the earth retaining material is restricted by the head of the underground continuous wall, the depth of penetration of the earth retaining material can be shortened.
土留材は地中連続壁断面部分には重ならないので、頂版
施工に当って、頂版断面の欠損がない。Since the earth retaining material does not overlap the cross section of the underground continuous wall, there is no loss of the top slab cross section when constructing the top slab.
第１図〜第５図はこの発明の一実施例における施工手順
を示したもので、第１図（ａ）、第２図（ａ）、第３図
（ａ）、第４図（ａ）、および第５図は鉛直断面図、第
１図［有］）、第２図（ｂ）、第３図（ｂ）、および第
４図［有］）は平面図、第６図〜第９図は他の実施例に
おける施工手順を示したもので、他６図（ａ）、第７図
、第８図、および第９図は鉛直断面図、第６図（ｂ）は
平面図である。
１・・・地中連続壁、２・・・頂版、３，３′・・・土
留材、４・・・笠石、５・・・ソイルモルタル壁、６，
６°・・・ガイドウオール、７・・・掘削溝、８・・・
開削部分、９ ・・・橋脚第６図 第７７Figures 1 to 5 show the construction procedure in one embodiment of this invention, and Figure 1 (a), Figure 2 (a), Figure 3 (a), and Figure 4 (a). , and FIG. 5 are vertical sectional views, FIG. 1 (with), FIG. 2 (b), FIG. 3 (b), and FIG. The figures show construction procedures in other embodiments; the other six figures (a), 7, 8, and 9 are vertical sectional views, and figure 6 (b) is a plan view. . 1... Underground continuous wall, 2... Top slab, 3, 3'... Earth retaining material, 4... Capstone, 5... Soil mortar wall, 6,
6°...Guide wall, 7...Drilling groove, 8...
Cut-and-cut section, 9... Pier Figure 6 Figure 77
Claims (8)
下方に設けた地中連続壁基礎の施工法において、まず地
中連続壁施工位置の外側に地盤面から前記頂版位置より
下方に達する土留材を設け、該土留材の頭部にガイドウ
ォールを兼ねる笠石を設けて土留材の頭部を連結した後
、該土留材の内側に所定の深度に達する地中連続壁を前
記頂版位置高さまで施工し、次に前記土留材で囲まれる
部分を前記頂版位置下端まで開削して、前記地中連続壁
の頂部に頂版を施工することを特徴とする地中連続壁基
礎の施工法。(1) In the method of constructing an underground continuous wall foundation in which the top slab formed at the top of the underground wall is installed below the ground surface, the top slab is first located outside the underground wall construction position from the ground surface. An earth retaining material that reaches further downward is provided, a capstone that also serves as a guide wall is provided on the head of the earth retaining material, and the heads of the earth retaining materials are connected, and then an underground continuous wall that reaches a predetermined depth is installed inside the earth retaining material. The underground continuation is characterized in that the construction is carried out up to the height of the top slab position, and then the part surrounded by the earth retaining material is excavated to the lower end of the top slab position, and the top slab is constructed at the top of the underground continuous wall. Construction method for wall foundations.
挿入してなるソイルモルタル壁である特許請求の範囲第
１項記載の地中連続壁基礎の施工法。(2) The method for constructing an underground continuous wall foundation according to claim 1, wherein the earth retaining material is a soil mortar wall formed by vertically inserting H-beams at required intervals.
の地中連続壁基礎の施工法。(3) The method for constructing an underground continuous wall foundation according to claim 1, wherein the earth retaining material is a steel sheet pile.
範囲第１項記載の地中連続壁基礎の施工法。(4) The method for constructing an underground continuous wall foundation according to claim 1, wherein the earth retaining material is a pile such as a steel pipe pile or RC pile.
範囲第１項記載の地中連続壁基礎の施工法。(5) The method for constructing an underground continuous wall foundation according to claim 1, wherein the capstone is made of cast-in-place concrete.
なる特許請求の範囲第１項記載の地中連続壁基礎の施工
法。(6) The method for constructing an underground continuous wall foundation according to claim 1, wherein the capstone is a precast member made of steel or RC.
第１項記載の地中連続壁基礎の施工法。(7) The method for constructing an underground continuous wall foundation according to claim 1, wherein the top plate is made of reinforced concrete.
地中連続壁基礎の施工法。(8) The method for constructing an underground continuous wall foundation according to claim 1, wherein the top slab is made of steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62007763A JPH0649987B2 (en) | 1987-01-16 | 1987-01-16 | Underground continuous wall foundation construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62007763A JPH0649987B2 (en) | 1987-01-16 | 1987-01-16 | Underground continuous wall foundation construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63176530A true JPS63176530A (en) | 1988-07-20 |
| JPH0649987B2 JPH0649987B2 (en) | 1994-06-29 |
Family
ID=11674727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62007763A Expired - Lifetime JPH0649987B2 (en) | 1987-01-16 | 1987-01-16 | Underground continuous wall foundation construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0649987B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359118A (en) * | 2011-08-02 | 2012-02-22 | 北京健安诚岩土工程有限公司 | Annular foundation of underground continuous wall and construction method thereof |
| JP2019190029A (en) * | 2018-04-19 | 2019-10-31 | 鹿島建設株式会社 | Guide wall and construction method of guide wall |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5949973A (en) * | 1982-09-16 | 1984-03-22 | Tokyo Ink Kk | Water supplying device for offset printing plate surface |
-
1987
- 1987-01-16 JP JP62007763A patent/JPH0649987B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5949973A (en) * | 1982-09-16 | 1984-03-22 | Tokyo Ink Kk | Water supplying device for offset printing plate surface |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359118A (en) * | 2011-08-02 | 2012-02-22 | 北京健安诚岩土工程有限公司 | Annular foundation of underground continuous wall and construction method thereof |
| JP2019190029A (en) * | 2018-04-19 | 2019-10-31 | 鹿島建設株式会社 | Guide wall and construction method of guide wall |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0649987B2 (en) | 1994-06-29 |
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