JP2000204574A - Reconstruction method for underground structure - Google Patents
Reconstruction method for underground structureInfo
- Publication number
- JP2000204574A JP2000204574A JP11006839A JP683999A JP2000204574A JP 2000204574 A JP2000204574 A JP 2000204574A JP 11006839 A JP11006839 A JP 11006839A JP 683999 A JP683999 A JP 683999A JP 2000204574 A JP2000204574 A JP 2000204574A
- Authority
- JP
- Japan
- Prior art keywords
- underground
- wall
- existing
- wall section
- external 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
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、地下構造物の改築
方法に関し、特に既設地下外壁を解体しつつ地下構造物
の構築を行えるようにした方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for remodeling an underground structure, and more particularly to a method for constructing an underground structure while dismantling an existing underground outer wall.
【０００２】[0002]
【従来の技術】既設地下構造物を改築しようとする場
合、既設地下外壁または既設土留壁（以下、地下外壁部
と称する）が障害となる。外壁部を撤去する際には、一
般にロックオーガによる破砕作業により行われていた
が、ビットの損耗が著しく、しかも騒音、振動が著し
く、オーガーが敷地境界からはみ出すなどの理由によ
り、隣地境界に対して外壁部がぎりぎりいっぱいに構築
されている場合には、完全には撤去できなかった。2. Description of the Related Art When an existing underground structure is to be reconstructed, an existing underground outer wall or an existing earth retaining wall (hereinafter referred to as an underground outer wall portion) becomes an obstacle. When the outer wall was removed, it was generally performed by crushing work using a rock auger.However, the bit was significantly worn, and the noise and vibration were remarkable. If the outer wall was barely built, it could not be completely removed.
【０００３】そこで、従来では、例えば特開平２−１３
２２２６号公報、あるいは特公平２−１３０９４号公報
に示すように、既設外壁部を残置したままの施工がなさ
れていた。前者の方法では、例えば図６に示すように、
隣接地域の地盤を安定に保つべく、既設地下外壁部１の
みを残して既設地下構造物を解体し、既設地下外壁部１
の内側に新たな地下外壁部２を構築し、次いで地下構造
物を構築する方法をとっている。また、後者の方法で
は、既設地下外壁部を下方に延長する方法が採られてい
る。Therefore, conventionally, for example, Japanese Patent Laid-Open No.
As shown in Japanese Patent Publication No. 2226 or Japanese Patent Publication No. 2-13094, the construction was performed with the existing outer wall part left. In the former method, for example, as shown in FIG.
In order to keep the ground in the adjacent area stable, the existing underground structure is dismantled, leaving only the existing underground outer wall 1, and the existing underground outer wall 1
A new underground outer wall 2 is constructed inside the building, and then an underground structure is constructed. In the latter method, the existing underground outer wall is extended downward.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前者の
方法では、新たな地下構造物が既設の地下構造物より小
さくなる制約があり、また、後者の方法では、施工が困
難であり、しかも既設構造物を混在させた状態で構築す
るため、出来上った構造物の耐久性などにも疑問が生ず
るものであった。However, in the former method, there is a restriction that the new underground structure is smaller than the existing underground structure, and in the latter method, the construction is difficult and the existing structure is difficult. Since the structure is constructed in a state where the objects are mixed, there is a question about the durability of the completed structure.
【０００５】本発明方法は、以上の欠点を解消するもの
であり、その目的は、既設の地下外壁部を解体しつつ新
たな地下構造物を構築できるようにした地下構造物の改
築方法を提供するものである。An object of the present invention is to provide a method for remodeling an underground structure capable of constructing a new underground structure while dismantling an existing underground outer wall portion. Is what you do.
【０００６】[0006]
【課題を解決するための手段】以上の目的を達成するた
め、本発明の改築方法は、既設地下外壁部に近接して仮
地下壁を構築し、既設地下外壁部と仮地下壁との間の床
スラブおよび梁を切断し、既設地下外壁部と仮地下壁と
の空間に泥水を満たすとともに、既設地下外壁を適宣間
隔に切断してブロック化し、既設地下外壁部の外側面を
周囲地盤と縁切りし、ブロック化された既設地下外壁部
を地上の引上げ装置により引抜き・撤去し、引抜き跡に
ケーシングを挿入して、これと仮地下外壁との間の泥水
を固化させ、次いでケーシングを引抜き、新たな地下外
壁部を構築するとともに、これに前後し、または並行し
て、既設建物本体部の解体および新たな地下構造物を構
築することを順に行うものである。In order to achieve the above object, a rebuilding method according to the present invention comprises the steps of: constructing a temporary underground wall near an existing underground outer wall; Cut the floor slabs and beams, and fill the space between the existing underground outer wall and the temporary underground wall with muddy water, cut the existing underground outer wall at appropriate intervals and block it, and cut the outer surface of the existing underground outer wall into the surrounding ground. Withdrawal and removal of the existing underground outer wall part that has been blocked, using a pulling device above the ground, inserting the casing into the extraction trace, solidifying muddy water between this and the temporary underground outer wall, and then pulling out the casing In addition, a new underground outer wall portion is constructed, and before or after or in parallel with this, dismantling of the existing building main body portion and construction of a new underground structure are sequentially performed.
【０００７】従って、本発明方法にあっては、既設外壁
部を完全撤去しながら新たな地下構造物の構築が可能と
なる。Therefore, according to the method of the present invention, it is possible to construct a new underground structure while completely removing the existing outer wall.
【０００８】本発明においては、前記工程（ｂ）におい
て、既設地下外壁の切断を長尺コアボーリングによる連
続孔明け作業により行うことが好ましい。この発明にお
いて、「長尺コアボーリングによる連続孔明け」とは、
コアボーリング方法により縦方向に形成されるボーリン
グ孔を壁厚方向に連続させる作業により、外壁部を切り
分ける作業を言い、従来のロックオーガによる破砕作業
に比べて静粛性があり、ビットの損耗がなく、完全な切
り分け作業が可能である。In the present invention, in the step (b), it is preferable that the cutting of the existing underground outer wall is performed by a continuous drilling operation by long core boring. In the present invention, "continuous drilling by long core boring"
The work of cutting the outer wall by making the boring holes formed in the vertical direction by the core boring method continuous in the wall thickness direction.It is quieter than conventional rock auger crushing work, and there is no bit wear. , Complete separation work is possible.
【０００９】[0009]
【発明の実施の形態】以下、本発明の好ましい実施の形
態につき、添付図面を参照して詳細に説明する。図１〜
５は本発明の改築方法の手順を示している。まず図１に
おいて、既設地下構築物の解体準備作業がなされる。こ
の方法は、地下連続壁及びこれと一体化されている躯体
外壁からなる外壁部１０と連結している地下各階の梁・
スラブ１１を切断１２し、また、地下底板の下面に薬注
１３を行ってその下部地盤の止水を行った後、仮外壁１
４により切断１２の部分を遮蔽し、次いで仮外壁１４と
外壁部１０との間に泥水１５を注入充填することで、準
備作業を完了する。Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Figure 1
5 shows the procedure of the remodeling method of the present invention. First, in FIG. 1, preparation work for dismantling an existing underground building is performed. This method is based on the method of forming beams and beams on each basement floor connected to an outer wall portion 10 composed of an underground continuous wall and a frame outer wall integrated therewith.
After cutting 12 the slab 11 and performing chemical injection 13 on the lower surface of the underground base plate to stop the water of the lower ground, the temporary outer wall 1 is cut off.
The preparation work is completed by shielding the portion of the cut 12 with 4 and then filling and filling the muddy water 15 between the temporary outer wall 14 and the outer wall 10.
【００１０】次に、図２に示すように、地表部に長尺コ
アボーリングマシン１６を配置し、その削孔用チューブ
１８をマシン１６の縦ガイド１６ａに沿って地下外壁部
に鉛直に挿入しつつ回転駆動することで、その先端ビッ
ト１８ａによる削孔作業がなされ、外壁部１０の頂部か
ら底部までに至るボーリング孔２０が形成される。Next, as shown in FIG. 2, a long core boring machine 16 is arranged on the ground surface, and a drilling tube 18 is inserted vertically into the underground outer wall along the vertical guide 16a of the machine 16. By rotating while driving, a drilling operation is performed by the tip bit 18a, and a boring hole 20 extending from the top to the bottom of the outer wall portion 10 is formed.
【００１１】この削孔作業を、図の一部に拡大して示す
ように、外壁部１０の壁厚方向に沿って孔２０の一部を
交叉させた状態で連続的に繰返すことで、外壁部１０は
深度方向に沿って切り分けられる。以上の作業は外壁部
１０の長手方向に沿って所定ピッチ間隔で繰返されるこ
とで、外壁部１０は深度方向に沿って切り分けられた複
数のコンクリートブロックに分割される。なお、ボーリ
ング孔２０の先端の曲りによる未切断部分の残留は、先
行ボーリング孔２０をガイドとして後行ボーリング孔２
０を明けることで解消される。This drilling operation is continuously repeated with a part of the hole 20 crossing along the wall thickness direction of the outer wall portion 10 as shown in an enlarged view of a part of the figure, so that the outer wall is formed. The part 10 is cut along the depth direction. The above operation is repeated at predetermined pitch intervals along the longitudinal direction of the outer wall portion 10, so that the outer wall portion 10 is divided into a plurality of concrete blocks cut along the depth direction. The remaining uncut portion due to the bending of the tip of the boring hole 20 is removed by using the preceding boring hole 20 as a guide and the subsequent boring hole 2
The problem is solved by clearing 0.
【００１２】次に図３に示すように、ウオータジェット
吹付け用重機２２を地表部に位置させ、ウオータジェッ
ト吹付け用パイプ２４を外壁部１０の外側と周囲地盤と
の間に挿入しつつ先端よりアグレッシブをジェット噴出
させることにより、外壁部１０に対する土の付着がカッ
トされ、外壁部１０を構成している各ブロックは、この
縁切り作業により引抜き可能な状態となる。Next, as shown in FIG. 3, the water jet spraying heavy equipment 22 is positioned on the surface of the ground, and the water jet spraying pipe 24 is inserted between the outside of the outer wall 10 and the surrounding ground while the tip thereof is inserted. By jetting more aggressive jets, the adhesion of the soil to the outer wall portion 10 is cut, and the blocks constituting the outer wall portion 10 can be pulled out by this trimming operation.
【００１３】その後は、図４に示すように、引上げ装置
２６を地表部に位置させ、切り分けられた各ブロックの
上部にワイヤＷを玉掛けし、装置２６に配置されたリフ
ティングジャッキ２８を駆動することで、各ブロックは
その断面通りの形で順次地表部に引上げられ撤去され
る。Thereafter, as shown in FIG. 4, the pulling device 26 is positioned on the ground surface, the wire W is slung on the upper part of each of the divided blocks, and the lifting jack 28 disposed on the device 26 is driven. Then, each block is sequentially pulled up and removed from the surface in the form of its cross section.
【００１４】撤去後は、図５に示すように、外壁部後の
最深部である土留壁跡に泥水１５が流れ込むが、この上
部位置である躯体部分にケーシング３２を建て込み、こ
のケーシング３２と仮外壁１４との間に再度泥水３４を
注入充填する。但し、この泥水３４は固化性のある泥土
素材を用い、この泥水３４が固化した後、ケーシング３
２を引抜けば、ケーシング形状に応じた溝が形成され
る。After the removal, as shown in FIG. 5, muddy water 15 flows into the remains of the retaining wall, which is the deepest part after the outer wall, and a casing 32 is built in the frame portion at the upper position. The muddy water 34 is injected and filled again between the temporary outer wall 14. However, the muddy water 34 uses a solidifying mud material, and after the muddy water 34 is solidified, the casing 3
By pulling out 2, a groove corresponding to the shape of the casing is formed.
【００１５】従ってその後は、この溝を新たな土留壁及
び躯体側外壁となる型枠として、鉄筋の建て込みとコン
クリートの打設により新たな地下外壁部を構築すること
が出来る。また、新たな地下外壁部の構築後は、梁・ス
ラブ１１、仮外壁１４の撤去、泥水３４の固化した泥土
の除去を行いつつ、順次新たな梁・スラブを外壁部に接
続しつつ構築することで、地下構造物の構築作業がなさ
れることになる。Therefore, after that, a new underground outer wall portion can be constructed by embedding reinforcing steel and placing concrete, using the groove as a formwork for a new retaining wall and a frame-side outer wall. After the construction of the new underground outer wall, the beam / slab 11 and the temporary outer wall 14 are removed, and the mud solidified from the muddy water 34 is removed, and the new beam / slab is sequentially connected to the outer wall to construct. Thus, the construction work of the underground structure will be performed.
【００１６】[0016]
【発明の効果】以上の説明により明らかなように、本発
明による地下構造物の改築方法によれば、既設外壁部を
完全撤去しながら新たな地下構造物の構築が可能とな
り、これにより、新築部分の面積を旧構築物の面積と同
等に構築でき、しかも工法的にも簡単で、旧材料との混
在による耐久性に対する懸念も解消される。As is apparent from the above description, according to the method for rebuilding an underground structure according to the present invention, it is possible to construct a new underground structure while completely removing the existing outer wall portion. The area of the part can be constructed to be equal to the area of the old structure, and the construction method is simple, and concerns about durability due to the mixture with the old material are eliminated.
【図１】本発明方法における地下外壁部撤去準備作業時
における説明用断面図である。FIG. 1 is an explanatory cross-sectional view during a preparation work for removing an underground outer wall portion in the method of the present invention.
【図２】同外壁部切り分け作業時の一部拡大図を含む説
明用断面図である。FIG. 2 is an explanatory cross-sectional view including a partially enlarged view at the time of the outer wall portion cutting operation.
【図３】同外壁部と周囲地盤との縁切り作業時の説明用
断面図である。FIG. 3 is an explanatory cross-sectional view at the time of an edge cutting operation between the outer wall portion and a surrounding ground.
【図４】同ブロック状に切り分けられた外壁部の引上げ
作業時の説明用断面図である。FIG. 4 is an explanatory cross-sectional view of the outer wall portion cut into the block shape during a lifting operation.
【図５】同外壁部引上げ後の溝に対するケーシングの建
て込み作業を示す説明用断面図である。FIG. 5 is an explanatory cross-sectional view showing an operation of setting a casing into a groove after the outer wall portion is pulled up.
【図６】従来の改築方法の一例を示す説明用断面図であ
る。FIG. 6 is an explanatory sectional view showing an example of a conventional remodeling method.
１０ 地下外壁部 １１ 梁・スラブ １２ 切断 １４ 仮外壁 １５，３４ 泥水 １６ 長尺コアボーリングマシン １８ ボーリング用チューブ ２０ ボーリング孔 ２２ ウオータージェット吹付け用重機 ２６ 引上げ装置 ３２ ケーシング DESCRIPTION OF SYMBOLS 10 Underground outer wall part 11 Beam / slab 12 Cutting 14 Temporary outer wall 15, 34 Muddy water 16 Long core boring machine 18 Boring tube 20 Boring hole 22 Heavy machine for water jet spraying 26 Pulling device 32 Casing
Claims (2)
地下構造物の改築方法。 （ａ）既設地下外壁部に近接して仮地下壁を構築し、既
設地下外壁部と仮地下壁との間の床スラブおよび梁を切
断する。 （ｂ）既設地下外壁部と仮地下壁との空間に泥水を満た
すとともに、既設地下外壁を適宣間隔に切断してブロッ
ク化する。 （ｃ）既設地下外壁部の外側面を周囲地盤と縁切りす
る。 （ｄ）ブロック化された既設地下外壁部を地上の引上げ
装置により引抜き・撤去する。 （ｅ）引抜き跡にケーシングを挿入し、これと地下仮外
壁との間の泥水を固化させ、ケーシングを引抜く。 （ｆ）新たな地下外壁部を構築するとともに、これに前
後し、または並行して、既設建物本体部の解体および新
たな地下構造物を構築する。1. A method for remodeling an underground structure, comprising the steps of: (A) A temporary underground wall is constructed close to the existing underground outer wall, and floor slabs and beams between the existing underground outer wall and the temporary underground wall are cut. (B) Fill the space between the existing underground outer wall and the temporary underground wall with muddy water, and cut the existing underground outer wall into blocks at appropriate intervals. (C) The outer surface of the existing underground outer wall is cut off from the surrounding ground. (D) Pull out and remove the existing underground outer wall that has been made into a block with a lifting device above the ground. (E) Insert the casing into the extraction trace, solidify muddy water between this and the temporary underground outer wall, and extract the casing. (F) While constructing a new underground outer wall, before or after or in parallel with this, dismantling the existing building main body and constructing a new underground structure.
の切断を長尺コアボーリングによる連続孔明け作業によ
り行うことを特徴とする請求項１に記載の地下構造物の
改築方法。2. The method according to claim 1, wherein, in the step (b), the cutting of the existing underground outer wall is performed by continuous drilling work by long core boring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00683999A JP3620323B2 (en) | 1999-01-13 | 1999-01-13 | How to renovate underground structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00683999A JP3620323B2 (en) | 1999-01-13 | 1999-01-13 | How to renovate underground structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000204574A true JP2000204574A (en) | 2000-07-25 |
| JP3620323B2 JP3620323B2 (en) | 2005-02-16 |
Family
ID=11649421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00683999A Expired - Fee Related JP3620323B2 (en) | 1999-01-13 | 1999-01-13 | How to renovate underground structures |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3620323B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015124587A (en) * | 2013-12-27 | 2015-07-06 | 清水建設株式会社 | Construction method for new underground skeleton, accompanied by demolition of existing underground skeleton |
| CN105155578A (en) * | 2015-06-23 | 2015-12-16 | 中建六局土木工程有限公司 | Construction method for existing supporting system connected into subway in complex geology and environment |
| RU2817422C1 (en) * | 2023-10-23 | 2024-04-16 | Общество с ограниченной ответственностью "Скуратовский опытно-экспериментальный завод" | Method for reconstruction of shaft support and unit for implementation of method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2459084C1 (en) * | 2011-01-20 | 2012-08-20 | Общество с ограниченной ответственностью "МЕТРОБАЛТСТРОЙ" | Method for vertical borehole reconstruction |
-
1999
- 1999-01-13 JP JP00683999A patent/JP3620323B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015124587A (en) * | 2013-12-27 | 2015-07-06 | 清水建設株式会社 | Construction method for new underground skeleton, accompanied by demolition of existing underground skeleton |
| CN105155578A (en) * | 2015-06-23 | 2015-12-16 | 中建六局土木工程有限公司 | Construction method for existing supporting system connected into subway in complex geology and environment |
| RU2817422C1 (en) * | 2023-10-23 | 2024-04-16 | Общество с ограниченной ответственностью "Скуратовский опытно-экспериментальный завод" | Method for reconstruction of shaft support and unit for implementation of method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3620323B2 (en) | 2005-02-16 |
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