JP3091859B2 - Piling method for shafts with openings at the top - Google Patents

Piling method for shafts with openings at the top

Info

Publication number
JP3091859B2
JP3091859B2 JP08247565A JP24756596A JP3091859B2 JP 3091859 B2 JP3091859 B2 JP 3091859B2 JP 08247565 A JP08247565 A JP 08247565A JP 24756596 A JP24756596 A JP 24756596A JP 3091859 B2 JP3091859 B2 JP 3091859B2
Authority
JP
Japan
Prior art keywords
underground continuous
shaft
opening
constructed
core
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 - Fee Related
Application number
JP08247565A
Other languages
Japanese (ja)
Other versions
JPH1088958A (en
Inventor
保英 赤木
豊文 池松
雅由 中川
義信 鈴木
守 柴田
Original Assignee
鹿島建設株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 鹿島建設株式会社 filed Critical 鹿島建設株式会社
Priority to JP08247565A priority Critical patent/JP3091859B2/en
Publication of JPH1088958A publication Critical patent/JPH1088958A/en
Application granted granted Critical
Publication of JP3091859B2 publication Critical patent/JP3091859B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、放水路などの構築
として、放水トンネルが接続する立坑を鉄筋コンクリー
ト構造物として施工する場合の立坑山留構造に関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical shaft retaining structure when a vertical shaft to which a water discharge tunnel is connected is constructed as a reinforced concrete structure as a construction of a water discharge channel or the like.

【0002】[0002]

【従来の技術】トンネル構築のための発進立坑の施工と
して図16に示すような鉛直な立坑躯体1をコンクリート
構造物として構築する場合に、まず、地中連続壁2で山
留止水壁を施工し、その内部を掘削して、順巻きまたは
逆巻きで立坑躯体1を構築する。
2. Description of the Related Art When constructing a vertical shaft structure 1 as a concrete structure as shown in FIG. Construction is performed, the inside of the shaft is excavated, and the shaft 1 is constructed by forward winding or reverse winding.

【0003】さらに、地中連続壁2の施工に際し、溝壁
の崩壊防止を目的として地中連続壁2の内側・外側にソ
イルセメント柱列壁(SMW:Soil Mixing Wall))3
a,3bを先行して施工することも行われる。図中4
a,4bはソイルセメント柱列壁3a,3bの頂部に形
成したガイドウォールである
Further, when the underground continuous wall 2 is constructed, a soil cement column wall (SMW: Soil Mixing Wall) 3 is provided inside and outside the underground continuous wall 2 for the purpose of preventing the collapse of the trench wall.
A and 3b may be applied in advance. 4 in the figure
Reference numerals a and 4b denote guide walls formed on the tops of the soil cement column walls 3a and 3b.

【0004】[0004]

【発明が解決しようとする課題】しかし、前記鉛直な立
坑躯体1の上部に図15に示すように放水口となる開口部
1aを形成する場合は、その外側に地中連続壁2が位置
するので、これを後で斫る等の手段で撤去するのでは非
常な手間と労力を費やさねばならない。
However, in the case where an opening 1a serving as a water outlet is formed in the upper part of the vertical shaft body 1 as shown in FIG. 15, the underground continuous wall 2 is located outside the opening 1a. Therefore, it is very time-consuming and labor-intensive to remove this later by cutting or other means.

【0005】本発明の目的はこのような事情を考慮し
て、上部に開口部をもつ立坑を構築する場合でも、簡単
かつ合理的な施工で、工費も低減させることができる上
部に開口部を有する立坑の山留工法を提供することにあ
る。
An object of the present invention is to provide an opening in the upper part which can reduce the construction cost by simple and rational construction even when constructing a shaft having an opening in the upper part in consideration of such circumstances. An object of the present invention is to provide a method of retaining a shaft.

【0006】[0006]

【課題を解決するための手段】本発明は前記目的を達成
するため、第1に、立坑施工のための地中連続壁施工に
際し、溝壁の崩壊防止を目的として地中連続壁の内側・
外側にソイルセメント柱列壁を施工する場合において、
立坑躯体に開口部を設けるため、将来開口となる部分に
ついては地中連続壁を構築せず、その部分の外側のソイ
ルセメント柱列壁は芯材を立込んでおき、また、鋼材を
地中連続壁から立設して前記地中連続壁を構成しない部
分に予め配置しておき、地中連続壁の内部掘削および立
坑躯体の構築後、ソイルセメント柱列の芯材の撤去を行
い、開口部のある部分の立坑外部掘削は鋼矢板土留によ
り前記鋼材に切梁反力を取りながら開削で行うことを要
旨とするものである。
SUMMARY OF THE INVENTION In order to achieve the above object, the present invention firstly, when constructing an underground continuous wall for a shaft, constructing an underground continuous wall for the purpose of preventing collapse of a trench wall.
When constructing soil cement column walls on the outside,
In order to provide an opening in the shaft, the underground continuous wall will not be constructed for the part that will be opened in the future, the core wall will be installed on the outside of that part, and the steel material will be installed underground. Standing up from the continuous wall and pre-arranged in a part that does not constitute the underground continuous wall, after excavating the inside of the underground continuous wall and constructing the shaft skeleton, removing the core material of the soil cement column, opening The point is that the excavation outside the shaft in a part having a portion is performed by open-cutting while taking a reaction force against the steel beam with the steel sheet pile retaining.

【0007】第2に、地中連続壁の頭をリング状の梁で
結び、ソイルセメント柱列の芯材の撤去に続いていて、
この頭部リング梁の撤去を行うこと、第3に、芯材は後
で引き抜くためにワックスを塗布しておくこと、第4
に、立坑躯体の開口部は仮壁を構築しておくことを要旨
とするものである。
Second, the head of the underground continuous wall is tied by a ring-shaped beam, followed by removal of the core material of the soil cement column,
The removal of this head ring beam, third, the core material should be waxed for later withdrawal, the fourth.
In addition, the point of the opening of the shaft structure is to construct a temporary wall.

【0008】請求項1記載の本発明によれば、立坑本体
に将来開口を設けるために、地中連続壁もこの開口とな
る部分については構築しない。したがって、地中連続壁
は開口部以深では円形構造となるが、それ以浅では円形
を構成しない。また、この地中連続壁を構築しない部分
の外側のソイルセメント柱列壁は後で引き抜く芯材を立
込んでそれ自体に山留機能を持たせる。
According to the first aspect of the present invention, in order to provide an opening in the shaft body in the future, the underground continuous wall is not constructed at the opening. Therefore, the underground continuous wall has a circular structure below the opening, but does not form a circle below the opening. In addition, the soil cement column wall outside the portion where the underground continuous wall is not constructed is provided with a core material to be later pulled out, so that it has a mountain retaining function.

【0009】また、開口部のある部分の立坑外部掘削は
開削で行うが、その土留は鋼矢板土留により地中連続壁
に下端を埋設して立設した鋼材に切梁反力を取りながら
行うことができる。
[0009] In addition, the excavation outside of the shaft in the portion having the opening is carried out by open-cutting, and the retaining is carried out while taking the reaction force of the cutting beam to the steel material erected with the lower end buried in the underground continuous wall by the steel sheet pile retaining. be able to.

【0010】請求項2記載の本発明によれば、前記作用
に加えて、地中連続壁上部はリングを構成していないた
め、円形土留としてのリング効果を発揮できないが、地
中連続壁の頭をリング状の梁で結ぶことにより、リング
を構成していない部分にもリング効果を持たせる。
According to the second aspect of the present invention, in addition to the above-mentioned functions, the upper part of the underground continuous wall does not form a ring, so that a ring effect as a circular earth retaining material cannot be exhibited. By connecting the head with a ring-shaped beam, a ring effect is provided even in a portion that does not constitute a ring.

【0011】請求項3記載の本発明によれば、芯材はワ
ックスを塗布しておくことで後で引き抜き易いものとな
り、請求項4記載の本発明によれば、立坑躯体の開口部
は仮壁を構築しておくことで開口部施工までの土砂の流
入を防ぎ、将来開口部施工に際し、この仮壁は撤去す
る。
According to the third aspect of the present invention, the core material can be easily pulled out later by applying wax, and according to the fourth aspect of the present invention, the opening of the vertical shaft body is temporarily The construction of the wall prevents the inflow of earth and sand until the opening is constructed, and the temporary wall will be removed when the opening is constructed in the future.

【0012】[0012]

【発明の実施の形態】以下、図面について本発明の実施
の形態を詳細に説明する。本発明は立坑躯体を構築する
のに、土留・止水壁として地中連続壁2を施工するもの
であるが、図1〜図5に示すように、溝壁防護を目的と
して地中連続壁の内側・外側にソイルセメント柱列壁3
a,3bを先行して施工する。
Embodiments of the present invention will be described below in detail with reference to the drawings. According to the present invention, an underground continuous wall 2 is constructed as a soil retaining / water blocking wall to construct a shaft shaft body. However, as shown in FIGS. Inside and outside of soil cement pillar row 3
a and 3b are performed first.

【0013】立坑躯体の上部に開口部を設けるため、後
工程で地中連続壁の撤去を避けるため、地中連続壁2
も、開口となる部分については構築しない。したがっ
て、図5に示すように開口部以深では円形構造となる
が、それ以浅では円形を構成しない。
In order to provide an opening in the upper part of the shaft, the underground continuous wall 2 is required to avoid removal of the underground continuous wall in a later process.
Also, no construction is made for the portion that becomes the opening. Accordingly, as shown in FIG. 5, a circular structure is formed below the opening, but a circular structure is not formed below the opening.

【0014】そして、前記地中連続壁を構築しないその
部分の外側のソイルセメント柱列壁3aにはそれ自体に
山留機能を持たせるため、ソイルセメント柱列の中にH
鋼による芯材5を立込んでおく。また、この芯材5であ
るH鋼は後で引き抜くため、ワックスを塗布しておく。
The soil cement column wall 3a outside the portion where the underground continuous wall is not constructed is provided with a soil retaining function so that the soil cement column has H.
The steel core material 5 is set up. The H steel, which is the core material 5, is coated with wax so as to be pulled out later.

【0015】また、図7、図8に示すように、将来、立
坑開口部の施工にあたり立坑外側を開削して施工するた
め、その土留(鋼矢板土留)の切梁反力を受ける鋼材6
(H鋼)をその下端を地中連続壁2に埋設して立設して
相互に適宜間隔を存して前記地中連続壁を構成しない部
分に予め配置しておく。この鋼材6の周囲は砕石7で充
填する。
As shown in FIGS. 7 and 8, in order to construct the opening of the shaft in the future, the outside of the shaft will be cut and constructed.
(H steel) is erected with its lower end buried in the underground continuous wall 2 and is arranged in advance at a portion where the underground continuous wall is not formed at an appropriate interval from each other. The periphery of the steel material 6 is filled with crushed stone 7.

【0016】さらに地中連続壁2の上部はリングを構成
していないため、円形土留としてのリング効果を発揮で
きない。そこで、図8、図9に示すように地中連続壁2
の頭を頭部リング梁9(コーピング)で結ぶことによ
り、リングを構成していない部分にもリング効果をもた
せる。
Furthermore, since the upper part of the underground continuous wall 2 does not form a ring, the ring effect as a circular earth retaining material cannot be exhibited. Therefore, as shown in FIGS.
Is joined by a head ring beam 9 (coping), so that a ring effect is provided even in a portion not forming a ring.

【0017】このようにしてから地中連続壁2の内部掘
削を行うが、この掘削は地中連続壁2の上部構造が非対
称であるので、工事の安全を確保するため、計測を行い
ながら行う。
After the underground continuous wall 2 is excavated in this manner, the excavation is performed while performing measurement to ensure the safety of the construction because the upper structure of the underground continuous wall 2 is asymmetric. .

【0018】立坑躯体1の構築は順巻で行う。開口部は
仮壁10(壁厚300mm )を構築しておき、開口部1aの施
工までの土砂の流入を防ぐ。将来、開口部1aの施工に
際し、この仮壁10は撤去する。
The construction of the shaft body 1 is performed in the forward winding. The opening has a temporary wall 10 (wall thickness 300 mm) constructed to prevent inflow of earth and sand until the opening 1a is constructed. In the future, when the opening 1a is constructed, the temporary wall 10 will be removed.

【0019】予めワックスを塗布してソイルセメント柱
中に立込んであったソイルセメント柱列壁3aの芯材5
を引抜き、および頭部リング梁9を撤去する。
The core material 5 of the soil-cement column row wall 3a which was previously applied with wax and stood in the soil-cement column.
And the head ring beam 9 is removed.

【0020】前記開口部1aの施工に際し立坑躯体1の
外部掘削を行う。図10〜図13に示すように、この掘削は
鋼矢板11を打設し、前記地中連続壁2に予め設置してお
いた鋼材6との間に切梁12を架設した土留により開削を
行う。図中13は腹起し、14は水平継材である。
When the opening 1a is constructed, the shaft 1 is externally excavated. As shown in FIG. 10 to FIG. 13, this excavation is performed by digging a steel sheet pile 11, and excavating with a soil retaining member having a cutting beam 12 laid between the steel material 6 previously installed on the underground continuous wall 2. Do. In the figure, 13 is prone, and 14 is a horizontal joint.

【0021】立坑躯体1には開口部1aを挟んで放水口
導水壁15を構築して付加する。
A water outlet wall 15 is constructed and added to the shaft 1 with the opening 1a interposed therebetween.

【0022】[0022]

【発明の効果】以上述べたように本発明の上部に開口部
を有する立坑の山留工法は、上部に開口部をもつ立坑を
構築する場合でも、開口部前の地中連続壁を撤去する必
要がなく、簡単かつ合理的な施工で、工費も低減するこ
とができるものである。
As described above, according to the method of the present invention, in the method of erection of a shaft having an opening at the top, the underground continuous wall in front of the opening is removed even when a shaft having an opening at the top is constructed. There is no need, and simple and rational construction can reduce the construction cost.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の上部に開口部を有する立坑の山留工法
の地中連続壁構築時の1実施形態を示す平面図である。
FIG. 1 is a plan view showing an embodiment of the present invention at the time of constructing an underground continuous wall by a pit retaining method of a shaft having an opening at an upper portion thereof.

【図2】図1のA部詳細図である。FIG. 2 is a detailed view of a portion A in FIG.

【図3】図1のB部詳細図である。FIG. 3 is a detailed view of a portion B in FIG. 1;

【図4】地中連続壁構築時の溝壁防護工の側面である。FIG. 4 is a side view of a trench wall protection work when constructing an underground continuous wall.

【図5】ソイルセメント柱列壁の施工を示す斜視図であ
る。
FIG. 5 is a perspective view showing construction of a soil cement column wall.

【図6】切梁反力を取る鋼材の配設を示す斜視図であ
る。
FIG. 6 is a perspective view showing the disposition of a steel material that takes a cutting beam reaction force.

【図7】切梁反力を取る鋼材の配設を示す側面図であ
る。
FIG. 7 is a side view showing the disposition of a steel material that takes a reaction force of a cutting beam.

【図8】頭部リング梁の施工を示す斜視図である。FIG. 8 is a perspective view showing construction of a head ring beam.

【図9】頭部リング梁の施工を示す縦断側面図である。FIG. 9 is a vertical sectional side view showing construction of a head ring beam.

【図10】立坑内部掘削時の縦断側面図である。FIG. 10 is a vertical cross-sectional side view when excavating the inside of a shaft.

【図11】図10のB−B線断面図である。FIG. 11 is a sectional view taken along line BB of FIG. 10;

【図12】図11のC−C線断面図である。FIG. 12 is a sectional view taken along line CC of FIG. 11;

【図13】図11のD−D線断面図である。FIG. 13 is a sectional view taken along line DD of FIG. 11;

【図14】放水口取合部の横断平面図である。FIG. 14 is a cross-sectional plan view of a water outlet connection portion.

【図15】上部に放水口となる開口部を有する立坑躯体
の斜視図である。
FIG. 15 is a perspective view of a shaft shaft body having an opening serving as a water discharge port in an upper part.

【図16】従来例を示す縦断側面図である。FIG. 16 is a vertical sectional side view showing a conventional example.

【符号の説明】[Explanation of symbols]

1…立坑躯体 1a…開口部 2…地中連続壁 3a,3b…ソイ
ルセメント柱列壁 4a,4b…ガイドウォール 5…芯材 6…鋼材 7…砕石 9…頭部リング梁 10…仮壁 11…鋼矢板 12…切梁 13…腹起し 14…水平継材 15…放水口導水壁
DESCRIPTION OF SYMBOLS 1 ... Shaft skeleton 1a ... Opening 2 ... Underground continuous wall 3a, 3b ... Soil cement column row wall 4a, 4b ... Guide wall 5 ... Core material 6 ... Steel material 7 ... Crushed stone 9 ... Head ring beam 10 ... Temporary wall 11 … Steel sheet pile 12… cut beam 13… belly 14… horizontal joint 15… water outlet water guide wall

───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴木 義信 愛知県名古屋市中区新栄町二丁目14番地 鹿島建設株式会社 名古屋支店内 (72)発明者 柴田 守 愛知県名古屋市中区新栄町二丁目14番地 鹿島建設株式会社 名古屋支店内 (58)調査した分野(Int.Cl.7,DB名) E21D 1/00 E02D 5/20 101 E21D 5/01 E21D 9/06 301 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshinobu Suzuki 2--14 Shineicho, Naka-ku, Nagoya-shi, Aichi Prefecture Kashima Construction Co., Ltd., Nagoya Branch No. 14 Kashima Corporation Nagoya Branch (58) Field surveyed (Int.Cl. 7 , DB name) E21D 1/00 E02D 5/20 101 E21D 5/01 E21D 9/06 301

Claims (4)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 立坑施工のための地中連続壁施工に際
し、溝壁の崩壊防止を目的として地中連続壁の内側・外
側にソイルセメント柱列壁を施工する場合において、立
坑躯体に開口部を設けるため、将来開口となる部分につ
いては地中連続壁を構築せず、その部分の外側のソイル
セメント柱列壁は芯材を立込んでおき、また、鋼材を地
中連続壁から立設して前記地中連続壁を構成しない部分
に予め配置しておき、地中連続壁の内部掘削および立坑
躯体の構築後、ソイルセメント柱列の芯材の撤去を行
い、開口部のある部分の立坑外部掘削は鋼矢板土留によ
り前記鋼材に切梁反力を取りながら開削で行うことを特
徴とした上部に開口部を有する立坑の山留工法。
When an underground continuous wall for the construction of a shaft is constructed, a soil cement column wall is constructed inside or outside the underground continuous wall for the purpose of preventing collapse of a trench wall. In the future, the underground continuous wall will not be constructed for the part that will be opened in the future, the core material will be erected on the outside of that part, and the steel material will be erected from the underground continuous wall. Then, the underground continuous wall is arranged beforehand in a portion that does not constitute the underground continuous wall, and after excavating the inside of the underground continuous wall and constructing the shaft structure, the core material of the soil cement column is removed, and the portion having the opening is removed. A method of excavating a shaft with an opening at an upper part, wherein the outside excavation of the shaft is performed by open-cutting while taking a reaction force against the steel beam by steel sheet pile retaining.
【請求項2】 地中連続壁の頭をリング状の梁で結び、
ソイルセメント柱列の芯材の撤去に続いていて、この頭
部リング梁の撤去を行う請求項1記載の上部に開口部を
有する立坑の山留工法。
2. Connect the head of the underground continuous wall with a ring-shaped beam,
The method of claim 1, wherein the head ring beam is removed following the removal of the core material of the soil cement column.
【請求項3】 芯材は後で引き抜くためにワックスを塗
布しておく請求項1または請求項2記載の上部に開口部
を有する立坑の山留工法。
3. The method according to claim 1, wherein a wax is applied to the core material for subsequent withdrawal.
【請求項4】 立坑躯体の開口部は仮壁を構築しておく
請求項1ないし請求項3のいずれかに記載の上部に開口
部を有する立坑の山留工法。
4. The method according to claim 1, wherein the opening of the shaft is formed with a temporary wall.
JP08247565A 1996-09-19 1996-09-19 Piling method for shafts with openings at the top Expired - Fee Related JP3091859B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP08247565A JP3091859B2 (en) 1996-09-19 1996-09-19 Piling method for shafts with openings at the top

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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KR100898969B1 (en) * 2007-07-26 2009-05-25 (주)동명기술공단종합건축사사무소 Tunnel Boring Method Using Sheet Pile and Tunnel Structure therof
CN106480890B (en) * 2016-12-06 2018-07-27 马鞍山瑞马钢构材料有限公司 The construction method of steel sheet pile deep basal pit and stiff baseplate settler used
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