JP2504359B2 - How to build an underground structure - Google Patents
How to build an underground structureInfo
- Publication number
- JP2504359B2 JP2504359B2 JP4151666A JP15166692A JP2504359B2 JP 2504359 B2 JP2504359 B2 JP 2504359B2 JP 4151666 A JP4151666 A JP 4151666A JP 15166692 A JP15166692 A JP 15166692A JP 2504359 B2 JP2504359 B2 JP 2504359B2
- Authority
- JP
- Japan
- Prior art keywords
- mountain retaining
- underground
- board
- groove
- build
- 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
Links
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は地下構造物、より詳細
には４〜５ｍ位の掘削によって地下１階程度の構造物を
構築するのに好適な構築方法を提案するにある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention proposes a construction method suitable for constructing an underground structure, more specifically, a structure of about the first floor underground by excavating about 4 to 5 m.
【０００２】[0002]
【発明が解決しようとする課題】従来、地下に構造物を
構築するには、事前にシートパイル、ＳＭＷ、あるいは
Ｈ鋼横矢板などの山留め壁をつくり、床付け位置まで根
切りを行ない、捨てコンクリート、地下スラブのコンク
リート打設等を順次行い構築していた。Conventionally, in order to construct a structure underground, a mountain retaining wall such as a sheet pile, SMW, or H steel horizontal sheet pile is constructed in advance, root cutting is performed to the floor mounting position, and the structure is discarded. It was constructed by sequentially placing concrete and underground slabs.
【０００３】このような従来の方法では、山留め壁を構
築する際に、大型機械の使用や、山留め壁支保工を必要
とし、長い工期を必要とした。In such a conventional method, when constructing the retaining wall, it was necessary to use a large machine and to support the retaining wall, which required a long construction period.
【０００４】この発明は上記事情に鑑みなされたもので
ある。その目的は、大型機械や山留め支保工を必要とせ
ず、施工工程を削減し、バックフォーと油圧クレーン程
度の機械を用いて作業能率よく地下構造物を構築する方
法を提案するにある。The present invention has been made in view of the above circumstances. The purpose is to propose a method of constructing an underground structure with high work efficiency by using a machine such as a backfor and a hydraulic crane, which does not require a large-scale machine or a mountain retaining support.
【０００５】[0005]
【課題を解決するための手段】この地下構造物の構築方
法は、地下に構造物を構築するに先だち、構造物の外壁
面位置に沿い根切り底よりやや深い溝を掘削し、この溝
内にプレキャストコンクリート板を挿入し、その底盤部
分にコンクリートを打設して断面Ｌ形の山留め架構をつ
くり山留めし、その内側を掘削し前記プレキャストコン
クリート板を本設躯体となし構造物を構築することを特
徴とする。[Means for Solving the Problems] This method of constructing an underground structure is such that, before constructing a structure underground, a groove that is slightly deeper than the root cutting bottom is excavated along the position of the outer wall surface of the structure. To insert a precast concrete plate into the base, place concrete on the bottom plate part to make a mountain retaining frame with an L-shaped cross section and to retain the mountain, excavate the inside and construct a structure without the precast concrete plate as the main body. Is characterized by.
【０００６】[0006]
【実施例】図１に、この実施例で用いるプレキャストコ
ンクリート板１（以下ＰＣ板という）を示す。このＰＣ
板１は方形平地の本体２の一方の短辺端に本設ジョイン
ト用の差筋３が突出し、他方の短辺縁部表面に底盤部差
筋４が直角に突出し、裏面にＴ形をなした水抜きパイプ
５が取付けてある。本体２の寸法は通常、高さ４〜５
ｍ、幅２〜３ｍ、厚さ４０〜５０cm程度である。EXAMPLE FIG. 1 shows a precast concrete board 1 (hereinafter referred to as a PC board) used in this example. This PC
The plate 1 has a main body 2 of a rectangular flat ground, one side of which is provided with a streak 3 for a permanent joint, the other side of the short side thereof is provided with a bottom streak 4 at a right angle, and a T-shaped rear surface is formed. The drainage pipe 5 is attached. The size of the main body 2 is usually 4 to 5 in height.
m, width 2 to 3 m, and thickness 40 to 50 cm.
【０００７】構築すべき構造物の外壁面６を外側面とな
し、幅１ｍ程度で、根切り底より３０〜５０cm深い溝７
をバックフォーで掘削する（図２）。この溝７内にＰＣ
板１を差筋３を上にし、裏面を構造物の外壁面６位置と
なし、油圧クレーンで吊り下げ挿入セットする。複数の
ＰＣ板１を長辺端面を接続して挿入しセットする（図
３）。A groove 7 having a width of about 1 m and a depth of 30 to 50 cm deeper than the root cutting bottom is formed by using the outer wall surface 6 of the structure to be constructed as an outer surface.
Excavate with a back force (Fig. 2). PC in this groove 7
Set the plate 1 with the differential line 3 on the top and the back surface at the position of the outer wall surface 6 of the structure, and suspend and set with a hydraulic crane. A plurality of PC plates 1 are connected by inserting the long side end faces and set (FIG. 3).
【０００８】挿入セットした複数のＰＣ板１の底盤部差
筋４を互いにメッシュ筋８等の鉄筋でジョイントした
後、底盤部にコンクリートを打設し、あと打ち底盤９を
形成し、断面Ｌ形の山留め架構１０をつくり、裏面を埋
戻材料１１で埋戻しする（図４）。この際、必要に応
じ、溝７底の水を水抜きパイプ５で吸引し排出する。After connecting the bottom plate differential bars 4 of the inserted and set PC plates 1 to each other with reinforcing bars such as mesh bars 8, concrete is placed on the bottom plate part to form a post-casting bottom plate 9 having an L-shaped cross section. The mountain retaining frame 10 is made and the back surface is backfilled with the backfilling material 11 (FIG. 4). At this time, if necessary, the water at the bottom of the groove 7 is sucked and discharged by the water drain pipe 5.
【０００９】山留め架構１０の内側の地盤を掘削して根
切りし、ＰＣ板１を本設躯体の壁となし、根切りした底
に地下スラブ１２および１階床スラブ１３を打設して地
下構造物を構築する（図５）。The ground inside the mountain retaining frame 10 is excavated and root-cut, the PC board 1 is used as the wall of the main body, and the underground slab 12 and the first-floor slab 13 are laid on the root where the root is cut. Build the structure (Figure 5).
【００１０】この構築の工程において、ＰＣ板１の底盤
部にあと打ち底盤９を形成してなった山留め架構１０の
土圧に対する支持機構は図６の通りであり、裏面に側圧
Ｆ−１あと打ち底盤９の下面および先端に受働土圧（支
持力）Ｆ−２，Ｆ−３が作用する。従って土圧の大き
さ、床付け地盤の支持力、地盤の水平反力を求めること
により、ＰＣ板およびあと打ち底盤の断面設計が可能で
あり所望の山留め機能を有する山留め架構をつくること
ができる。In the process of this construction, the supporting mechanism for earth pressure of the mountain retaining frame 10 in which the bottom plate 9 of the PC board 1 is formed is as shown in FIG. Passive earth pressures (supporting forces) F-2 and F-3 act on the lower surface and the tip of the bottom plate 9. Therefore, by obtaining the magnitude of earth pressure, the bearing capacity of the ground with floor, and the horizontal reaction force of the ground, it is possible to design the cross section of the PC board and the post-cast bottom board, and it is possible to create a mountain retaining frame having a desired mountain retaining function. .
【００１１】実施例のように、ＰＣ板裏面に水抜パイプ
を取付け、ＰＣ板裏面の水を排出すると側圧が低下しＰ
Ｃ板の断面を小とすることができる。自立しない地盤に
溝を掘削する場合は泥水中で施工することができる。As in the embodiment, when the water drain pipe is attached to the back surface of the PC board and the water on the back surface of the PC board is drained, the lateral pressure decreases and P
The cross section of the C plate can be small. When excavating a trench in the ground that does not stand alone, it can be constructed in mud water.
【００１２】[0012]
【作用および発明の効果】この発明は以上の構成からな
り、この構築方法は溝内に作業者が入ることなく山留
め架構をつくることができる。山留めは梁、アンカー
等の支保工を必要としない。大型機械を用いず、バッ
クフォー、油圧クレーン程度の機械を用い施工できる。
山留め壁を本設壁として使用するので、工程を削減し
工期を短縮できる。予め表面仕上げしたＰＣ板を用い
ることにより、現場での仕上げが不要となる。底盤を
現場であと打ちし形成するので掘削地盤に密着し、受働
抵抗力を充分発揮できる。The present invention has the above-mentioned structure, and this construction method can form a mountain retaining frame without an operator entering the groove. Mountain retaining does not require support work such as beams and anchors. It is possible to perform construction using a machine such as a back fore or hydraulic crane without using a large machine.
Since the mountain retaining wall is used as a permanent wall, the number of processes can be reduced and the construction period can be shortened. By using a PC board that has been surface-finished in advance, on-site finishing is unnecessary. Since the bottom is punched on-site and formed, it can be closely attached to the excavated ground and exert sufficient passive resistance.
【００１３】従って、この構築方法によると、地下１階
程度の構築物を作業の安全性を確保し、短い工期、低コ
ストで構築できる効果を奏する。Therefore, according to this construction method, there is an effect that a construction on the first basement floor can be secured in work safety, and can be constructed in a short construction period and at low cost.
【図１】（ａ），（ｂ）は実施例で用いるＰＣ板の表面
側斜視図および裏面側斜視図である。1A and 1B are a front side perspective view and a back side perspective view of a PC board used in an embodiment.
【図２】実施例の溝掘削状態を示す斜視図である。FIG. 2 is a perspective view showing a groove excavation state of the embodiment.
【図３】実施例の掘削した溝内にＰＣ板を挿入セットし
た状態を示す断面図である。FIG. 3 is a cross-sectional view showing a state in which a PC plate is inserted and set in the excavated groove of the embodiment.
【図４】実施例の掘削した溝内にＰＣ板を挿入セット
し、コンクリートを打設し山留め架構をつくる状態の一
部断面で示す斜視図である。FIG. 4 is a perspective view showing a partial cross-section of a state in which a PC plate is inserted and set in the excavated groove of the embodiment and concrete is placed to form a mountain retaining frame.
【図５】実施例の構築した地下構造物の断面図である。FIG. 5 is a cross-sectional view of an underground structure constructed in the example.
【図６】実施例の山留め架構の土圧に対する支持機構を
説明する断面図である。FIG. 6 is a cross-sectional view illustrating a support mechanism against earth pressure of the mountain retaining frame of the embodiment.
１…ＰＣ板、２…ＰＣ板本体、３…本設ジョイント用差
筋、４…底盤部差筋、５…水抜きパイプ、６…構造物外
壁面、７…溝、８…メッシュ筋、９…あと打ち底盤、１
０…山留め架構、１１…埋戻材料、１２…地下スラブ、
１３…１階床スラブ。DESCRIPTION OF SYMBOLS 1 ... PC board, 2 ... PC board main body, 3 ... Reinforcing bar for permanent joint, 4 ... Bottom board rebar, 5 ... Drain pipe, 6 ... External wall surface of structure, 7 ... Groove, 8 ... Mesh bar, 9 … Trailing bottom plate, 1
0 ... Mounting frame, 11 ... Backfill material, 12 ... Underground slab,
13 ... 1st floor slab.
Claims (1)
物の外壁面位置に沿い根切り底よりやや深い溝を掘削
し、この溝内にプレキャストコンクリート板を挿入し、
その底盤部分にコンクリートを打設して断面Ｌ形の山留
め架構をつくり山留めし、その内側を掘削し前記プレキ
ャストコンクリート板を本設躯体となし構造物を構築す
ることを特徴とする地下構造物の構築方法。1. Before building a structure underground, a groove slightly deeper than the root cutting bottom is excavated along the outer wall surface of the structure, and a precast concrete plate is inserted into this groove.
An underground structure characterized in that concrete is cast into the bottom plate portion to form a mountain retaining frame with an L-shaped cross section, mountain retaining is performed, and the inside is excavated to construct a structure without the precast concrete plate as the main body. How to build.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4151666A JP2504359B2 (en) | 1992-06-11 | 1992-06-11 | How to build an underground structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4151666A JP2504359B2 (en) | 1992-06-11 | 1992-06-11 | How to build an underground structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05339953A JPH05339953A (en) | 1993-12-21 |
| JP2504359B2 true JP2504359B2 (en) | 1996-06-05 |
Family
ID=15523581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4151666A Expired - Lifetime JP2504359B2 (en) | 1992-06-11 | 1992-06-11 | How to build an underground structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2504359B2 (en) |
-
1992
- 1992-06-11 JP JP4151666A patent/JP2504359B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05339953A (en) | 1993-12-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960213 |