JP2657671B2 - Reconstruction method for existing structures - Google Patents

Reconstruction method for existing structures

Info

Publication number
JP2657671B2
JP2657671B2 JP63186725A JP18672588A JP2657671B2 JP 2657671 B2 JP2657671 B2 JP 2657671B2 JP 63186725 A JP63186725 A JP 63186725A JP 18672588 A JP18672588 A JP 18672588A JP 2657671 B2 JP2657671 B2 JP 2657671B2
Authority
JP
Japan
Prior art keywords
slab
ground
existing structure
existing
tunnel
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
Application number
JP63186725A
Other languages
Japanese (ja)
Other versions
JPH0238627A (en
Inventor
潔 小野沢
延良 池田
実 俣野
直人 高見
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taisei Corp
Original Assignee
Taisei Corp
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 Taisei Corp filed Critical Taisei Corp
Priority to JP63186725A priority Critical patent/JP2657671B2/en
Publication of JPH0238627A publication Critical patent/JPH0238627A/en
Application granted granted Critical
Publication of JP2657671B2 publication Critical patent/JP2657671B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は地上の既設構造物を使用しつつ、その地下部
に建替用の構造物の基礎部を構築する、既設構造物の建
替工法に関する。
DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention uses an existing structure on the ground and constructs a foundation for a structure for rebuilding in the underground part of the existing structure. Concerning the construction method.

〈従来の技術〉 大規模な範囲に渡って集合住宅等の既設構造物を建て
替えするには、地上に存在する既設構造物を移設又は
解体した後、開削工や基礎工を行って、構造物の地上
部を構築し、最後に基礎部の上方に地上部を構築して
いる。
<Conventional technology> In order to rebuild existing structures such as apartment buildings over a large area, after relocating or dismantling existing structures existing on the ground, excavation and foundation work will be performed. Above the ground, and finally, above the foundation.

〈本発明が解決しようとする問題点〉 上記した従来の既設構造物の建替技術には次のような
課題がある。
<Problems to be Solved by the Present Invention> The above-mentioned conventional techniques for rebuilding an existing structure have the following problems.

〈イ〉既設構造物の建替工事中は、既設構造物の使用が
不可能となる。
<B> During the rebuilding work of the existing structure, the existing structure cannot be used.

そのため、既設構造物を維持したまま、建て替えられ
る技術の提案が望まれている。
Therefore, there is a demand for a technique for rebuilding the existing structure while maintaining the existing structure.

〈ロ〉一般に既設構造物の建替には、ある程度の地上廻
りに仮設スペースが必要とされる。
<B> In general, rebuilding of existing structures requires some temporary space around the ground.

又、既設構造物内の各種収容物を仮置きする仮移転ス
ペースも要求される。
In addition, a temporary relocation space for temporarily placing various items in the existing structure is also required.

しかし、地価の高騰傾向にある最近は、これらのスペ
ースを確保することが困難になりつつある。
However, it is becoming more difficult to secure these spaces in recent years when land prices are rising.

〈本発明の目的〉 本発明は以上の点に鑑みて成されたもので、次のよう
な既設構造物の建替工法を提供することを目的とする。
<Object of the present invention> The present invention has been made in view of the above points, and an object of the present invention is to provide a method for rebuilding an existing structure as follows.

〈イ〉既設構造物を維持したまま、建替工事を行える、
既設構造物の建替工法。
<a> Reconstruction work can be performed while maintaining the existing structure.
Reconstruction method for existing structures.

〈ロ〉土地の有効利用が図れる、既設構造物の建替工
法。
<B> A method of rebuilding existing structures that allows effective use of land.

〈本発明の構成〉 以下、図面を参照しながら本発明に係る既設構造物の
建替工法の一実施例について説明する。
<Configuration of the Present Invention> Hereinafter, an embodiment of a method for rebuilding an existing structure according to the present invention will be described with reference to the drawings.

〈イ〉トンネルの掘削(第2図) 建替予定地の周辺に立坑1を構築する。<B> Tunnel excavation (Fig. 2) A shaft 1 will be constructed around the planned reconstruction site.

この際、必要に応じて止水壁10を構築する。 At this time, the water stop wall 10 is constructed as needed.

そして、立坑1から建替予定地の地下部の全域にわた
ってトンネル2を掘削する。
Then, a tunnel 2 is excavated from the shaft 1 to the entire underground portion of the planned reconstruction site.

トンネル2の掘削方法は、地上に立設する既設構造物
3の基礎形式に応じて選定する。
The excavation method of the tunnel 2 is selected according to the foundation type of the existing structure 3 erected on the ground.

掘削方法としては、例えば既設構造物3の基礎形式が
直接基礎の場合は、シールド工法やメッセル工法等を採
用し、又、杭基礎の場合は、メッセル工法等を採用す
る。
As an excavation method, for example, when the foundation type of the existing structure 3 is a direct foundation, a shield method or a messel method is adopted, and when the foundation type is a pile foundation, a messel method or the like is adopted.

トンネル2を掘削する際、必要に応じてパイプルーフ
工法や薬液注入工法等の補助工法を併用する。
When excavating the tunnel 2, auxiliary methods such as a pipe roof method and a chemical liquid injection method are used as needed.

尚、既設構造物3の基礎形式が杭基礎の場合は、既設
構造物3の基礎の一部を構成する既設杭31とトンネル2
が衝突することになるが、地盤沈下の防止を目的とし
て、トンネル2に既設杭31を貫通させた状態で掘削す
る。
When the foundation type of the existing structure 3 is a pile foundation, the existing pile 31 and the tunnel 2 forming a part of the foundation of the existing structure 3 are used.
However, in order to prevent land subsidence, excavation is performed with the existing pile 31 penetrating the tunnel 2.

〈ロ〉基礎杭の構築(第2図) リバースサーキュレーション工法等によりトンネル2
の下方にのびる基礎杭4を構築する。
<B> Construction of foundation pile (Fig. 2) Tunnel 2 by reverse circulation method
Of the foundation pile 4 extending downward.

〈ハ〉PCスラブの構築(第2、3図) 次に、トンネル2のスラブ面に、PCスラブ21を構築す
る。
<C> Construction of PC slab (Figs. 2 and 3) Next, a PC slab 21 is constructed on the slab surface of the tunnel 2.

PCスラブ21は、基礎杭4及び既設杭31と一体に構築す
る。
The PC slab 21 is constructed integrally with the foundation pile 4 and the existing pile 31.

このPCスラブ21は、地下を施工する際に土砂の崩落防
止用の天版として機能する他、最終的には構造物の構成
材となる。
The PC slab 21 functions as a top plate for preventing the collapse of earth and sand when the underground is constructed, and finally becomes a constituent material of the structure.

PCスラブ21の構築法としては、トンネル2のスラブ面
に、基礎杭4を包囲するように鉄筋と共にPC鋼材をルー
プ状に配筋してコンクリートを打設した後、スラブの途
上において、PC鋼材を緊張して定着する方法を採用でき
る。
The construction method of the PC slab 21 is as follows. After the PC steel material is arranged in a loop shape together with the reinforcing steel so as to surround the foundation pile 4 on the slab surface of the tunnel 2 and concrete is poured into the slab, the PC steel material is formed in the middle of the slab. Can be adopted a method of fixing the tension.

尚、PCスラブ21のプレストレスの導入法は、トンネル
2の高さや施工範囲等を考慮して最適な公知のプレスト
レスの導入法を採用する。
As a method of introducing the prestress of the PC slab 21, a known well-known method of introducing the prestress is adopted in consideration of the height of the tunnel 2, the construction range, and the like.

又、必要に応じてトンネル2内の上部空洞に発泡モル
タルを充填する。
Also, if necessary, the upper cavity in the tunnel 2 is filled with foam mortar.

〈ニ〉スラブ下の掘削(第4図) 基礎杭4群と一体構造のPCスラブ21を構築したら、PC
スラブ21の下方を掘削して、地下空間5を形成する。
<D> Excavation under the slab (Fig. 4) After constructing the PC slab 21 integrated with the foundation pile 4 group, the PC
The underground space 5 is formed by excavating below the slab 21.

PCスラブ21の上方の総荷重は、PCスラブ21と一体の基
礎杭4群により支持されるので、地下空間5の掘削中の
崩壊が阻止される。
Since the total load above the PC slab 21 is supported by the group of foundation piles 4 integral with the PC slab 21, the collapse of the underground space 5 during excavation is prevented.

PCスラブ21の下方の掘削作業に際し、地下空間5に連
通する削土搬出用坑道を事前に構築しておく方法を採用
した場合は、大量の排土作業を高能率に行える。
In the case of excavation work below the PC slab 21, when a method of constructing in advance a soil excavation gallery communicating with the underground space 5 is adopted, a large amount of earth removal work can be performed with high efficiency.

〈ホ〉地下施設の構築(第5図) 地下空間5の内面に、コンクリートを打設して地下施
設7を構築する。
<E> Construction of an underground facility (Fig. 5) An underground facility 7 is constructed by casting concrete on the inner surface of the underground space 5.

そして、必要に応じて地上側の既設構造物3の施設を
地下施設7へ移設する。
Then, the facility of the existing structure 3 on the ground side is moved to the underground facility 7 as necessary.

〈ホ〉地上施設の構築(第6図) 最後に、地下施設7の上部に地上施設8を構築する。<E> Construction of Ground Facility (FIG. 6) Finally, a ground facility 8 is constructed above the underground facility 7.

地上施設8は、既設構造物3群を順次撤去しながら構
築する他、一度に既設構造物3群を撤去して構築する方
法が考えられる。
The ground facility 8 may be constructed by sequentially removing the existing three groups of structures, or by removing the existing three groups at a time.

〈発明の効果〉 本発明は以上説明したようになるから次の効果が得ら
れる。
<Effects of the Invention> Since the present invention has been described above, the following effects can be obtained.

〈イ〉地上の既設構造物を維持したまま、建替構造物の
基礎工事を行える。
<a> The foundation work of the rebuilding structure can be performed while maintaining the existing structure on the ground.

又、建替構造物の地下施設が完成した後に、地上施設
を構築するため、既設構造物の使用中止期間を最小限に
おさえることができる。
In addition, since the ground facility is constructed after the underground facility of the reconstructed structure is completed, the period during which use of the existing structure is stopped can be minimized.

〈ロ〉完成した地下施設を、地上側の既設構造物の移設
空間として活用できる。
<B> The completed underground facilities can be used as a relocation space for existing structures on the ground side.

〈ハ〉地上部廻りの仮設スペースを最小限におさえられ
る。
<C> Temporary space around the ground can be minimized.

〈ニ〉地上部での土地の有効利用が図れる。<D> Effective use of land above ground can be achieved.

〈ホ〉PCスラブでは、止水壁や土止壁の切梁として兼用
できる他、最終的に構造物の一部として有効に活用する
ことができる。
<E> PC slabs can be used as cut-off beams for water and earth retaining walls, and ultimately can be effectively used as part of structures.

〈ヘ〉大規模な市場や集合住宅地等の建替工事に好適で
ある。
<F> Suitable for rebuilding large-scale markets and housing complexes.

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

第1図:本発明に係る一実施例の説明図であって地下施
設の構築時の部分断面図 第2図:トンネル掘削時のトンネル縦断面図 第3図:PCスラブの構築時のトンネル縦断面図 第4図:PCスラブ下の掘削時の縦断面図 第5図:地下施設の構築時の縦断面図 第6図:地上施設の構築時の断面図
Fig. 1: Explanatory drawing of one embodiment according to the present invention, showing a partial cross-sectional view when constructing an underground facility Fig. 2: Longitudinal cross-sectional view when tunnel excavation Fig. 3: Tunnel longitudinal cross-section when constructing PC slab Fig. 4: Longitudinal section when excavating under PC slab Fig. 5: Longitudinal section when constructing an underground facility Fig. 6: Cross section when constructing a ground facility

フロントページの続き (72)発明者 高見 直人 東京都新宿区西新宿1丁目25番1号 大 成建設株式会社内 (56)参考文献 特開 平2−20768(JP,A)Continuation of front page (72) Inventor Naoto Takami 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Inside Taisei Corporation (56) References JP-A-2-20768 (JP, A)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】地上の既設構造物を維持したまま建替予定
地の地下部の全域にわたってトンネルを掘削し、 トンネルのスラブ面に下方にのびる基礎杭を構築し、 次に、トンネルのスラブ面に、前記基礎杭と一体構造で
あって、プレストレスを導入したPCスラブを構築し、 前記PCスラブを介して基礎杭群で地盤を支持しつつPCス
ラブの下方を掘削して地下施設を構築し、 地上の既設構造物を撤去しながら前記地下施設と一体の
地上施設を構築する、 既設構造物の建替工法。
A tunnel is excavated over the entire underground part of the planned rebuilding site while maintaining the existing structure on the ground, and a foundation pile extending downward on the slab surface of the tunnel is constructed. Then, construct a PC slab that has an integral structure with the foundation pile and introduces prestress, and constructs an underground facility by excavating below the PC slab while supporting the ground with the foundation pile group via the PC slab Then, the existing structure on the ground is removed, and a ground facility integrated with the underground facility is constructed while removing the existing structure.
JP63186725A 1988-07-28 1988-07-28 Reconstruction method for existing structures Expired - Lifetime JP2657671B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63186725A JP2657671B2 (en) 1988-07-28 1988-07-28 Reconstruction method for existing structures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63186725A JP2657671B2 (en) 1988-07-28 1988-07-28 Reconstruction method for existing structures

Publications (2)

Publication Number Publication Date
JPH0238627A JPH0238627A (en) 1990-02-08
JP2657671B2 true JP2657671B2 (en) 1997-09-24

Family

ID=16193542

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63186725A Expired - Lifetime JP2657671B2 (en) 1988-07-28 1988-07-28 Reconstruction method for existing structures

Country Status (1)

Country Link
JP (1) JP2657671B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4485006B2 (en) * 2000-03-24 2010-06-16 鹿島建設株式会社 Construction method for underground structures
JP4548621B2 (en) 2008-05-15 2010-09-22 岩崎通信機株式会社 Electronic equipment with stand
CN111335670A (en) * 2020-03-18 2020-06-26 同济大学建筑设计研究院(集团)有限公司 Method for constructing foundation pit and newly adding underground structure in situ under existing reserved building

Also Published As

Publication number Publication date
JPH0238627A (en) 1990-02-08

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