JPS6272822A - Construction work of underground structure - Google Patents

Abstract

PURPOSE:To construct an underground structure without the needs for temporary work by a method in which the ground below a slab is excavated while hanging down the slab. CONSTITUTION:A column 1 serving as a pile is driven and an underground structure 2 is built up. Slabs for necessary stairs are constructed on the land, and while hanging down the slabs 3, the ground is excavated. The slabs are set on given places orderly from the slabs for the upper stairs. The slabs so set are joined with the columns, the surroundings of the slabs, and the underground continuous wall 2 by concreting. The needs for the operations of tension, waling, etc., for the constructing site where excavation is beforehand made can be eliminated, and also the costs of temporary construction and work including manpower, etc., can be greatly curtailed.

Description

【発明の詳細な説明】 （産業上の利用分野） この発明は地下または半地下以深に店舗地下駐車場、倉
庫などを構築するための地下構築物の構築工法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for constructing an underground structure for constructing an underground parking lot for a store, a warehouse, etc. underground or deeper than semi-underground.

（従　来　技　術） 従来、地下に構築物を構築するに際しては、予め構築予
定部分を掘削しておき最下層より上層に向い順次、スラ
ブ、柱を構する工法が一般例であり、また掘削しながら
上層より下層へ順次柱などを樹立するいわゆる逆打工法
も採用されていた。(Conventional technology) Conventionally, when constructing a structure underground, the common method was to excavate the area to be constructed in advance and construct slabs and pillars sequentially from the lowest level to the upper level. However, a so-called reverse construction method was also adopted, in which pillars were built sequentially from the upper layer to the lower layer.

（この発明が解決すべき問題点） しかしながら前記従来の工法は阿れも仮設時に切張、腹
起しなどを構築して施工を進めなければならず、その部
材、人手間など多大な仮設費を必要とするものであった
。(Problems to be solved by this invention) However, with the above-mentioned conventional construction method, it is necessary to build cut-and-rise structures, etc. at the time of temporary construction, and to proceed with the construction, a large amount of temporary construction costs such as materials and labor are required. was necessary.

この発明は前記事情に鑑み開発したもので、切張、腹起
しなどを構築するこ、となしに地下構築物を構築する工
法を提供することを目的とする。This invention was developed in view of the above circumstances, and an object of the present invention is to provide a construction method for constructing an underground structure without constructing a cut-off or a raised-up structure.

（問題点を解決するための手段） この発明の要旨とするところは、杭兼用柱を打設すると
共に地中連続壁を構築し、次いで地上にて予め必要階数
分のスラブを構築し、しかる後スラブを吊り降しながら
スラブ下の地盤を掘削し、上階のスラブより順次所定の
位置に配設すると共に配設し終えたスラブより上部の柱
にコンクリートを打設し、スラブ周辺部と地中連続壁と
を接合するものである。(Means for Solving the Problems) The gist of this invention is to drive a pile-cum-column and construct an underground continuous wall, and then construct slabs for the required number of floors in advance on the ground. The ground beneath the slabs is excavated while the slabs are being lowered, and the slabs on the upper floors are placed in the designated positions one after another. Concrete is poured into the pillars above the slabs that have been placed, and the surrounding area of the slabs and This is to connect the underground continuous wall.

（実　施　例） 以下図示した実施例に基いて説明すると、まず構築すべ
き敷地内に抗原用のスラブ吊り込み用柱１を打設し、さ
らに四周囲など所要の個所に地中連続壁２を構築する（
第１図。(Example) To explain based on the example illustrated below, first, pillars 1 for suspending antigen slabs are placed within the site to be constructed, and then underground continuous walls 2 are placed at required locations around the four sides. Build (
Figure 1.

第２図）。そして地上において予め必要階数分のスラブ
３を重ね合せた状態で構築する（第３図）。この場合ス
ラブ３はいわゆるフラットスラブとすることが好ましい
。Figure 2). Then, the slabs 3 for the required number of floors are stacked on top of each other on the ground in advance (Fig. 3). In this case, the slab 3 is preferably a so-called flat slab.

しかる後、スラブ３の下の地盤を掘削しながら地階部分
に配置するスラブ３をジヤツキＡなどを使用して除々に
吊り降して行く。そして床として必要な高さ位置迄該当
する階のスラブ３を吊り降したところでそのスラブ３よ
り上部の柱１にコンクリートを打設し、スラブ３の周辺
部と地中連続壁２とを接合する（第４図、第５図）。こ
のようにしてｊ哨次スラブ３を所定位置に配設するもの
で最下階のスラブ３を所定の位置迄吊り下したらスラブ
下を掘削し不陸空胴部分にコンクリートを充填すると共
に最下階の柱１にコンクリートを打設し、スラブ３の周
辺部と地中連続壁２とを接合し作業を終了する（第６図
）。Thereafter, while excavating the ground beneath the slab 3, the slab 3 to be placed in the basement is gradually lowered using a jack A or the like. Then, when the slab 3 of the relevant floor is suspended to the height required for the floor, concrete is poured into the column 1 above the slab 3, and the peripheral part of the slab 3 and the underground continuous wall 2 are connected. (Figures 4 and 5). In this way, the slab 3 on the bottom floor is placed in a predetermined position, and once the slab 3 on the lowest floor is suspended to the predetermined position, the bottom of the slab is excavated, the uneven hollow part is filled with concrete, and the bottom floor is Concrete is poured into the column 1 of the floor, and the peripheral part of the slab 3 and the continuous underground wall 2 are joined to complete the work (Figure 6).

（発明の効果） 以上、この発明は杭と地中連続壁とを地中に構築し、予
め地上において構築したスラブを除々に所定の位置迄吊
り降してなるので、従来の工法のように予め掘削した構
築予定地内に切張、復起し等を仮設する必要がなく、し
たがって仮設部材、人手間などの仮設費を大幅に逓減で
き、施工性の向上を期待できる。(Effects of the Invention) As described above, this invention constructs piles and underground continuous walls underground, and gradually lowers the slabs that have been constructed on the ground in advance to a predetermined position. There is no need to temporarily construct shearing, reversing, etc. within the pre-excavated construction site, and therefore, temporary construction costs such as temporary materials and labor can be significantly reduced, and construction efficiency can be expected to be improved.

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

図面は施工順序を示したもので、第１図乃至第３図は斜
視図、第４図乃至第６図は縦断面図である。 １・・・・・・柱、２・・・・・・地中連続壁、３・・
・・・・スラブ。 第　１　図 第３図 第５図 第６図The drawings show the construction order, and FIGS. 1 to 3 are perspective views, and FIGS. 4 to 6 are longitudinal sectional views. 1... Column, 2... Underground continuous wall, 3...
...Slab. Figure 1 Figure 3 Figure 5 Figure 6

Claims (1)

【特許請求の範囲】 構築すべき敷地内にまず杭兼用の柱を打設 すると共に地中連続壁を構築し、次いで地上にて予め必
要階数分のスラブを構築し、しかる後スラブを吊り降し
ながらスラブ下の地盤を掘削し、上階のスラブより順次
所定の位置に配設すると共に配設し終えたスラブより上
部の柱にコンクリートを打設し、スラブ周辺部と地中連
続壁を接合することを特徴とする地下構築物の構築工法
。[Claims] First, pillars that also serve as piles are driven in the site to be constructed, and an underground continuous wall is constructed. Next, slabs for the required number of floors are constructed on the ground in advance, and then the slabs are suspended. The ground beneath the slabs is excavated, and the slabs are placed in the specified positions starting from the slabs on the upper floors. Concrete is poured into the pillars above the slabs that have been placed, and the surrounding area of the slabs and underground walls are constructed. A construction method for underground structures characterized by joining.