JPS6047413B2 - Construction method for constructing a new structure underground below an existing structure and filling material used therein - Google Patents
Construction method for constructing a new structure underground below an existing structure and filling material used thereinInfo
- Publication number
- JPS6047413B2 JPS6047413B2 JP623282A JP623282A JPS6047413B2 JP S6047413 B2 JPS6047413 B2 JP S6047413B2 JP 623282 A JP623282 A JP 623282A JP 623282 A JP623282 A JP 623282A JP S6047413 B2 JPS6047413 B2 JP S6047413B2
- Authority
- JP
- Japan
- Prior art keywords
- existing structure
- construction method
- existing
- new
- new structure
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/48—Foundations inserted underneath existing buildings or constructions
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)
- Working Measures On Existing Buildindgs (AREA)
Description
【発明の詳細な説明】
この発明は既設構造物の下方の地中に新設構造物を構
築する工法およびそれに使用する填充体に関するものて
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction method for constructing a new structure underground below an existing structure, and a filling material used therein.
従来この種の工法においては、既設構造物で仮受けし
た状態で新設構造物を構築した後、新既の両構造物間に
コンクリートを打設し、その硬化を持つて＊叉けの接合
作業を終了していた。Conventionally, in this type of construction method, after constructing a new structure while temporarily supporting it with an existing structure, concrete is poured between the two existing structures, and once it has hardened, the joint work is carried out. had finished.
このため接合後には既設構造物の自重が新設構造物に作
用して既設構造物が新設構造物とともに沈下し、また不
等沈下の傾向も現われて既設構造物の構造に変状を生ず
るという問題があつた。 このような既設構造物の沈下
を避けるために、コンクリートを打設する前に新既の両
構造物間にジャッキを挿入して、既設構造物の自重を反
力として新設構造物に予め沈下を生じさせる工法もある
が、既設構造物の底面積が広い場合には多数のジャッキ
を要し、また新既の両構造物間の間隙が小さい場合はジ
ャッキを挿入できず、実施が不可能になるという欠点が
あつた。Therefore, after joining, the existing structure's own weight acts on the new structure, causing the existing structure to sink along with the new structure, and there is also a tendency for uneven settlement, causing deformation of the structure of the existing structure. It was hot. In order to avoid such sinking of the existing structure, a jack is inserted between the new and existing structures before concrete is poured, and the weight of the existing structure is used as a reaction force to prevent the new structure from sinking. There is a construction method that allows this to occur, but if the base area of the existing structure is wide, many jacks are required, and if the gap between the new and existing structures is small, jacks cannot be inserted, making it impossible to implement. It had the disadvantage of becoming.
この発明は上記のような従来工法のもつ欠点を排除し
、既設構造物に沈下が生じることのない工法を提供する
ことを目的とする。The object of the present invention is to eliminate the drawbacks of conventional construction methods as described above and to provide a construction method that does not cause subsidence of existing structures.
この発明による工法は、既設構造物を仮受け材により
仮受けした後、その直下の地中に新設構造物を構築し、
新既両構造物間に填充体を配設し、この填充体内に填充
材を加圧注入して膨張および硬化させることにより新設
構造物の自重を新設構造物に伝達し、これにより新設構
造物のみに沈下を生じさせるとともに両構造物の接合を
図るものである。The construction method according to this invention involves temporarily supporting an existing structure with temporary supporting materials, and then constructing a new structure underground directly below it.
A filler is placed between the new and existing structures, and the filler is injected under pressure into the filler to expand and harden, thereby transmitting the weight of the new structure to the new structure. The aim is to cause subsidence in only one part of the structure, and to connect both structures together.
また従来填充体としては、第１図に示すようなものが
知られている。Furthermore, as a conventional filling body, one shown in FIG. 1 is known.
填充体９’は砂を通さないがセメント乳を通す粗目を有
する布袋１０を具え、布袋１０には弁１２を取付けた注
入管１４を経てモルタル１９が加圧注入され、粗目から
セメント乳が浸出するとともに、モルタル１９は膨張お
よび硬化するようになつている。 しかしこのような填
充体９’は、注入したモルタル１９の水分が粗目を通つ
て浸出するので流動性を失ない易く、注入効率が悪いと
いう欠点があつた。The filling body 9' includes a cloth bag 10 having coarse mesh that does not allow sand to pass through but allows cement milk to pass through. Mortar 19 is injected under pressure into the cloth bag 10 through an injection pipe 14 equipped with a valve 12, and cement milk leaches out from the coarse mesh. At the same time, the mortar 19 expands and hardens. However, such a filling material 9' has the disadvantage that the water in the poured mortar 19 leaches out through the coarse mesh, so that it tends to lose fluidity and has poor injection efficiency.
この発明は上記のような従来のものの欠点を排除し、
流動性が損なわれることのない填充体を提供することを
目的とする。This invention eliminates the drawbacks of the conventional ones as mentioned above,
The purpose is to provide a filling material whose fluidity is not impaired.
この発明の填充体は、粗目を有する外部の袋体と、その
内部に収容され防水性を有する袋体とを具え、内外部の
袋体に填充材が加圧注入される注入具をそれぞれ設けた
ものてある。The filling body of the present invention includes an outer bag body having coarse mesh and a waterproof bag housed inside the bag body, and an injection tool for injecting the filler under pressure into the inner and outer bag bodies. There are things.
この発明を図示の実施例を参照して説明する。The invention will be described with reference to illustrated embodiments.
ますこの発明の工法に使用される填充体について説明す
ることとする。第２図に示すように填充体９は、粗目を
有する外部の布袋１０と、布袋１０内に収容され防水性
を有する布袋１１とを具えている。The filling body used in the construction method of this invention will now be explained. As shown in FIG. 2, the filling body 9 includes an outer cloth bag 10 having coarse mesh, and a waterproof cloth bag 11 housed within the cloth bag 10.
布袋１０，１１にはバルブ１２，１３が取付けられた注
入管１４，１５がそれぞれ連結され、また内部の布袋１
１にはバルブ１６が取付けられた排気管１７が連結され
ている。外部の布袋１０には注入管１４を経てセメント
ペースト１８が圧入され、布袋１０の目の大きさは設計
圧に近い圧力でセメントペースト１８を圧入するときそ
の一部が浸出する程度のものであり、化学繊維よりなる
。Injection pipes 14 and 15 equipped with valves 12 and 13 are connected to the cloth bags 10 and 11, respectively, and the inside cloth bags 1
1 is connected to an exhaust pipe 17 to which a valve 16 is attached. Cement paste 18 is press-fitted into the external cloth bag 10 through the injection pipe 14, and the mesh size of the cloth bag 10 is such that when the cement paste 18 is press-fitted at a pressure close to the design pressure, a part of it oozes out. , made of chemical fiber.
布袋１０に注入する材料はセメントペースト１８に限ら
ず、流動状で注入できて一部が布目より浸出し、かつ硬
化強度の高い安定性のある材料であればよい。内部の布
袋１１には排気管１７より空気を排出しながらモルタル
１９が注入され、布袋１１はモルタル１９が浸出しない
ように防水性の化学繊維あるいは樹脂被覆のガラス繊維
よりなる。The material injected into the cloth bag 10 is not limited to the cement paste 18, but may be any stable material that can be injected in a fluid state, a portion of which leaches out from the grains, and has high curing strength. Mortar 19 is injected into the inner cloth bag 11 while air is exhausted from an exhaust pipe 17, and the cloth bag 11 is made of waterproof chemical fiber or resin-coated glass fiber to prevent the mortar 19 from seeping out.
布袋１１に注入する材料としては、モルタル１９に細骨
材を加えたものでもよい。なお内外部の布袋１０，１１
は両者の分離を避．けるために、断続的にミシンがけを
して部分的に接合してもよい。The material injected into the cloth bag 11 may be mortar 19 with fine aggregate added. In addition, the inner and outer cloth bags 10 and 11
avoids separation of the two. In order to keep the parts together, the parts may be joined by intermittent sewing using a sewing machine.
第３図には他の実施例が示されており、填充体９ａは内
部の布袋１１内に鉄筋籠２０を配設したものである。Another embodiment is shown in FIG. 3, in which the filling body 9a has a reinforcing bar cage 20 disposed inside a cloth bag 11.
第４図にはさらに他の実施例が示されており、填充体９
ｂは内部の布袋１１内に鉄骨体２１を配設したものであ
る。FIG. 4 shows yet another embodiment, in which the filling body 9
b shows a steel frame body 21 disposed inside the inner cloth bag 11.
つぎにこの発明の工法について説明する。Next, the construction method of this invention will be explained.
第５図に示すように基礎杭７によつて支持されくた既設
構造物１の両側に支持抗２ａ，２ｂを打込むとともに、
構造物１の基礎部３と仮受桁４とを連結する。As shown in FIG. 5, support shafts 2a and 2b are driven into both sides of the existing structure 1 supported by foundation piles 7, and
The foundation part 3 of the structure 1 and the temporary support girder 4 are connected.
仮受桁４と支持抗２ａ，２ｂとの間にジャッキ５を配置
し、仮受桁４を扛上させるようにジャッキ５を働かせる
と、構造物１の底面のレベルＸ１−Ｘ１は変わらずに構
造物１の自重Ｗが遂次支持杭２ａ，２ｂに伝達され、そ
の結果支持杭２ａ，２ｂはδ１，δ２の沈下を生じ、遂
に支持杭２ａ，２ｂはＲｌ，Ｒ２の反力を受持つて構造
物１、仮受桁４および支持杭２ａ，２ｂはそれぞれ静止
の状態で安定することになる。この後仮受桁４と支持杭
２ａ，２ｂとの間に仮支承材６を挿入し、ジャッキ５を
取外して仮受作業を終了する。クこの状態においてＲ１
＋Ｒ２＝Ｗの条件をとるものである。次いで第６図に示
すように構造物１の直下を掘削するとともに基礎抗７を
撤去し、新設構造物８を構築する。When a jack 5 is placed between the temporary support girder 4 and the support columns 2a and 2b, and the jack 5 is operated to lift up the temporary support girder 4, the level X1-X1 of the bottom surface of the structure 1 remains unchanged. The dead weight W of the structure 1 is successively transmitted to the support piles 2a and 2b, and as a result, the support piles 2a and 2b sink by δ1 and δ2, and finally the support piles 2a and 2b take on the reaction forces of Rl and R2. Therefore, the structure 1, the temporary support girder 4, and the support piles 2a, 2b are stabilized in a stationary state. Thereafter, the temporary support member 6 is inserted between the temporary support girder 4 and the support piles 2a, 2b, and the jack 5 is removed to complete the temporary support work. In this state, R1
The condition is +R2=W. Next, as shown in FIG. 6, excavation is made directly below the structure 1, the foundation shaft 7 is removed, and a new structure 8 is constructed.
その後構造物１の基礎部３と構造物７８との間に第２図
に示したように填充体９（または第３，４図に示した填
充体９ａ，９ｂ）を配設し、その外部の布袋１０内には
セメントペースト１８をまた内部の布袋１１内にはモル
タル１９をそれぞれ加圧注入して、填充体９を膨張およ
び硬ノ化させ、填充体９の膨張の際に構造物１の自重ｗ
を反力として構造物８にδ３の沈下を生じさせる。填充
体９の硬化により新既の両構造物１，８が接合するとと
もに、外部の布袋１０か浸出たセメントペースト１８に
よつて隣接した填充体９が互いに接合し、これをもつて
本受け作業を終了するものてある。この発明は上記のよ
うてあつて、新既の両構造物間に填充体を配設し、この
填充体内に填充材を加圧注入して膨張および硬化させる
ことにより既設構造物の自重を新設構造物に伝達するよ
うにしたので、新設構造物があらかじめ沈下してから両
構造物が接合し、したがつて既設構造物に沈下が生じる
ことがない。After that, the filling body 9 (or the filling bodies 9a and 9b shown in FIGS. 3 and 4) is arranged between the base part 3 of the structure 1 and the structure 78 as shown in FIG. Cement paste 18 is injected into the inner cloth bag 10 and mortar 19 is injected into the inner cloth bag 11 under pressure to expand and harden the filler 9, and when the filler 9 expands, the structure 1 dead weight lol
is used as a reaction force to cause the structure 8 to sink by δ3. As the filling material 9 hardens, both the new and existing structures 1 and 8 are joined together, and the adjacent filling materials 9 are joined to each other by the external cloth bag 10 or the leached cement paste 18, and with this, the main receiving work is completed. There is something to end it. This invention is constructed as described above, and a filler is disposed between both new and existing structures, and the filler is injected under pressure into the filler to expand and harden, thereby absorbing the dead weight of the existing structure. Since the information is transmitted to the structure, the newly constructed structure sinks beforehand and then the two structures are joined, so that the existing structure does not sink.
また填充体は粗目を有する外部の袋体の内部に防水性を
有する袋体を収容した２重構造としたので、内部の袋体
内の填充材の流動性は損なわれることがなく、填充材の
注入を効率よく行なうこことができる。In addition, the filling body has a double structure in which a waterproof bag is housed inside a coarse-mesh external bag, so the fluidity of the filling material inside the internal bag is not impaired. Injection can be performed efficiently.
第１図は従来の填充体を破断して示す斜視図、第２乃至
４図はこの発明の填充体の実施例を示す第１図と同様な
図面、第５図はこの発明の工法の仮受け施工の状態を示
す断面図、第６図は本受け施工の状態を示す断面図。
１・・・・・・既設構造物、２ａ，２ｂ・・・・・・支
持杭、４・・・・仮受桁、８・・・・・・新設構造物、
９，９ａ，９ｂ・・・・・填充体、１０・・・・・・外
部の布袋、１１・・・・・内部の布袋、１４，１５・・
・・・注入管。Fig. 1 is a perspective view showing a conventional filling body cut away, Figs. 2 to 4 are drawings similar to Fig. 1 showing an embodiment of the filling body of the present invention, and Fig. 5 is a tentative view of the construction method of the present invention. FIG. 6 is a cross-sectional view showing the state of the receiving construction, and FIG. 6 is a sectional view showing the state of the main receiving construction. 1...Existing structure, 2a, 2b...Support pile, 4...Temporary support girder, 8...New structure,
9, 9a, 9b...Filling body, 10...Outer cloth bag, 11...Inner cloth bag, 14,15...
...Injection tube.
Claims (1)
下の地中に新設構造物を構築し、この新設構造物と既設
構造物との間に填充体を配設し、この填充体内に填充材
を加圧注入して膨張および硬化させることにより既設構
造物の自重を新設構造物に伝達することを特徴とする既
設構造物下方の地中に新設構造物を構築する工法。 ２ 粗目を有する外部の袋体と、この外部の袋体内に収
容され防水性を有する内部の袋体とを具え、内外部の袋
体に填充材を加圧注入する注入具をそれぞれ設けたこと
を特徴とする填充体。[Scope of Claims] 1. After temporarily supporting an existing structure with a temporary support material, a new structure is constructed underground directly below it, and a filling body is placed between the new structure and the existing structure. A new structure is constructed underground below an existing structure, characterized by transferring the weight of the existing structure to the new structure by injecting a filler material under pressure into the filler, causing it to expand and harden. construction method. 2.Equipped with an outer bag having coarse mesh and an inner bag housed within the outer bag and having waterproof properties, each of which is provided with an injection device for injecting filler under pressure into the inner and outer bags. A filling body characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP623282A JPS6047413B2 (en) | 1982-01-19 | 1982-01-19 | Construction method for constructing a new structure underground below an existing structure and filling material used therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP623282A JPS6047413B2 (en) | 1982-01-19 | 1982-01-19 | Construction method for constructing a new structure underground below an existing structure and filling material used therein |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58123925A JPS58123925A (en) | 1983-07-23 |
| JPS6047413B2 true JPS6047413B2 (en) | 1985-10-22 |
Family
ID=11632765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP623282A Expired JPS6047413B2 (en) | 1982-01-19 | 1982-01-19 | Construction method for constructing a new structure underground below an existing structure and filling material used therein |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6047413B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62155713U (en) * | 1986-03-24 | 1987-10-03 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2724956A1 (en) * | 1994-09-22 | 1996-03-29 | Setec Travaux Publics Et Ind | Method of excavating tree having roots |
| ITBO20020552A1 (en) * | 2002-08-30 | 2004-02-29 | Soles Societa Lavori Edili E Serbatoi Spa | METHOD FOR THE CREATION OF A BASEMENT ROOM UNDER A BUILDING IN WORK. |
| ITBO20060414A1 (en) * | 2006-05-26 | 2007-11-27 | Soles Societa Lavori Edili E Serbatoi Spa | METHOD FOR LIFTING A BUILDING AFT. |
| JP5092705B2 (en) * | 2007-11-14 | 2012-12-05 | 株式会社大林組 | Support structure of structure, construction method of underground structure, replacement method of foundation load |
| EE00970U1 (en) | 2009-03-31 | 2010-10-15 | As Amhold | The method of constructing a building under the architectural “flattening |
-
1982
- 1982-01-19 JP JP623282A patent/JPS6047413B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62155713U (en) * | 1986-03-24 | 1987-10-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58123925A (en) | 1983-07-23 |
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