JPH0633684B2 - Method of collapsing structures supported by four columns - Google Patents
Method of collapsing structures supported by four columnsInfo
- Publication number
- JPH0633684B2 JPH0633684B2 JP15760486A JP15760486A JPH0633684B2 JP H0633684 B2 JPH0633684 B2 JP H0633684B2 JP 15760486 A JP15760486 A JP 15760486A JP 15760486 A JP15760486 A JP 15760486A JP H0633684 B2 JPH0633684 B2 JP H0633684B2
- Authority
- JP
- Japan
- Prior art keywords
- collapse
- pillars
- pillar
- collapsing
- chimney
- 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
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、４本柱で支持された煙突・高架水槽等の構
造物を、安全且つ経済的で短工期に、また、極めて方向
性良く倒壊する工法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides a structure in which a structure such as a chimney and an elevated water tank supported by four pillars is safe and economical, in a short construction period, and with excellent directionality. It relates to the method of collapse.
例えば、高さが２００ｍ以上といった大型の煙突の場
合、第１図・第２図に示すが如く、４本の柱(A),(B),
(C),(D)で支持することが多い。このような煙突が老朽
化した場合とか、或いは、煙突が設置されている工場が
休止になった場合には、このような煙突を撤去すること
が行われるが、従来この種の撤去工法としては、建て方
の逆順序解体工法が主流であった。For example, in the case of a large chimney having a height of 200 m or more, as shown in FIGS. 1 and 2, four pillars (A), (B),
Often supported by (C) and (D). When such a chimney is deteriorated, or when the factory in which the chimney is installed is shut down, such a chimney is removed, but as a conventional removal method of this kind, The reverse order dismantling method of construction was the mainstream.
所が、上記の工法は、極めて危険性が高いうえ、解体工
事費が高く、また、工期が長いといった難点があった。
この発明は、上記従来工法の欠点を解決し、倒壊の方向
性が極めて優れていると共に、安全性・工事費及び工期
に於いても有利な４本柱で支持された構造物の倒壊工法
を提供するものである。However, the above-mentioned construction method has the drawbacks that it is extremely dangerous, the dismantling work cost is high, and the construction period is long.
This invention solves the above-mentioned drawbacks of the conventional construction method, has an extremely excellent direction of collapse, and is also advantageous in terms of safety, construction cost, and construction period. It is provided.
この発明の特徴とする倒壊工法の要旨は、次の通りであ
る。The gist of the collapsing method, which is a feature of the present invention, is as follows.
(1) ４本柱で支持された構造物に於いて、 平面で見て一方の対角線上の倒壊の支点とする２本の柱
の下部を切断すること、他方の対角線上の２本の柱のう
ち、１本の柱の脚部を撤去し、他の１本の柱の下部を切
断することを、任意の順序で行い、上記倒壊の支点とな
る２本の柱を支点として、脚部を撤去した柱の方向へ倒
壊させることよりなる、４本柱で支持された構造物の倒
壊工法。(1) In a structure supported by four pillars, cutting the lower part of two pillars as the fulcrum of collapse on one diagonal line in a plan view, two pillars on the other diagonal line Among them, the leg part of one pillar is removed and the lower part of the other one pillar is cut in any order, and the leg part is supported by the two pillars that are the fulcrum of the collapse. A method of collapsing a structure supported by four pillars, which comprises collapsing the pillars in the direction of the removed pillars.
(2) 倒壊の支点となる２本の柱の下部に、補強材を接
合する前記(1)項記載の４本柱で支持された構造物の倒
壊工法。(2) The method of collapsing a structure supported by four pillars according to the above item (1), in which a reinforcing material is joined to the lower portions of the two pillars that are the fulcrum of collapse.
この発明の第１の特徴は次の通りである。 The first feature of the present invention is as follows.
第２図に示す如く、構造物を支持する４本の柱(A)，
(B)，(C)，(D)は、平面的に矩形をしている。一般に規
模が小さい構造物の倒壊は、相隣する２本の柱（例えば
Ａ，Ｂ）を支点にして、横または縦方向（矢印Ｘ）に倒
壊させることが可能である。しかし、冒頭にも述べた如
く、煙突の高さが例えば２００ｍもありまた、支柱間距
離が例えば４０ｍ以上にも及ぶ大規模なもの（第１図参
照）にあっては、重心（対角線の交点にある煙突Ｅ）が
後方にあり、また、かなりの重量であるため、実際には
採用し難いものである。As shown in Fig. 2, four pillars (A) supporting the structure,
(B), (C), and (D) are rectangular in a plane. In general, a structure having a small scale can be collapsed in the horizontal or vertical direction (arrow X) with two adjacent columns (for example, A and B) as fulcrums. However, as mentioned at the beginning, the height of the chimney is, for example, 200 m and the distance between the columns is, for example, 40 m or more (see FIG. 1). Since the chimney E) is located at the rear and has a considerable weight, it is difficult to adopt in practice.
この発明では、平面で見て一方の対角線上にある２本の
柱（例えばＡ，Ｃ）を支点として、斜め方向（矢印Ｙ）
に倒壊せんとするもので、その際、倒壊に支障となる倒
壊方向にある柱（例えばＢ）の脚部を撤去するものであ
る。このようにすることにより、重心を倒壊の支点近傍
（直線１）上に置くことが出来、小さな倒壊力でもっ
て、また、安定した方向性が確保出来、確実に倒壊出来
るものである。According to the present invention, two pillars (for example, A and C) on one diagonal line in a plan view are used as fulcrums in an oblique direction (arrow Y).
In this case, the legs of the pillar (for example, B) in the collapse direction, which hinders the collapse, are removed. By doing so, the center of gravity can be placed near the collapse fulcrum (straight line 1), a small collapse force can be ensured, stable directionality can be secured, and the structure can be surely collapsed.
この発明の第２の特徴は、倒壊の方向性の信頼度を更に
高めたところにある。上記の斜め倒壊工法によれば、横
または縦方向（矢印Ｘ）の倒壊工法に比較して倒壊の方
向性は飛躍的に向上するものであるが、倒壊時に支点と
なる２本の柱（例えばＡ，Ｃ）の脚部に発生する局部座
屈が懸念される場合は、更に倒壊の方向性の信頼度を更
に高める必要がある。The second feature of the present invention is that the reliability of the direction of collapse is further enhanced. According to the above-mentioned diagonal collapse method, the direction of collapse is dramatically improved as compared with the horizontal or vertical direction (arrow X) collapse method, but two pillars that serve as fulcrums during collapse (for example, When local buckling of the legs A, C) is a concern, it is necessary to further increase the reliability of the direction of collapse.
この発明では、後述する実施例で詳細に説明する如く、
支点となる２本の柱（例えばＡ，Ｃ）に対して倒壊時の
方向性を出すための、特殊な補強材を接合し、そして、
その２本の柱（例えばＡ，Ｃ）を切断しておくことによ
り、上述の懸念事項を解消したものである。In the present invention, as described in detail in the embodiments described later,
Special reinforcements are attached to the two pillars (eg A, C) that serve as fulcrums to provide directionality during collapse, and
By cutting the two pillars (for example, A and C) in advance, the above-mentioned concern is eliminated.
〔実施例〕 (a) 斜め倒壊方向の決定 煙突が建設されている周囲に広大な空地がある場合に
は、斜め倒壊の方向は特に問わないが、本実施例では、
第２図の(Y)方向に倒壊に十分な空地があるため、斜め
倒壊方向を(Y)とした。(Example) (a) Determination of diagonal collapse direction When there is a vast open space around the chimney is constructed, the direction of diagonal collapse is not particularly limited, in the present embodiment,
Since there is enough open space for the collapse in the (Y) direction in Fig. 2, the diagonal collapse direction was set to (Y).
(b) 倒壊の支点となる柱(A)，(C)の補強 第２図に示す如く、平面で見て斜め倒壊方向を(Y)と直
行する直線１上に存在する直径1250mmの２本の柱(A)，
(C)の下部の両側に、必要に応じて第３図〜第５図に示
す如く、補強材２を溶接する。この補強材２は基礎コン
クリート４上に設置したものであり、構造物の重量に十
分耐え、且つ倒壊時に局部座屈が生じないよう部材を選
択するものである。(b) Reinforcement of pillars (A) and (C), which are fulcrums for collapse, as shown in Fig. 2, two 1250 mm diameter existing on a straight line 1 perpendicular to (Y) in the oblique collapse direction when seen in a plane. Pillar (A),
If necessary, the reinforcing member 2 is welded to both sides of the lower part of (C) as shown in FIGS. This reinforcing material 2 is installed on the foundation concrete 4, and a member is selected so as to withstand the weight of the structure sufficiently and not to cause local buckling at the time of collapse.
(c) 柱(D)への押し上げ装置の設置 第３図及び第７図に示す如く、斜め倒壊方向(Y)と反対
側にある柱(D)の下部の両側に押し上げ力受け部材５
を、溶接固定し、この部材５と基礎コンクリート４との
複数個のジャッキ６を設置する。(c) Installation of the push-up device on the pillar (D) As shown in FIGS. 3 and 7, the push-up force receiving members 5 are provided on both sides of the lower part of the pillar (D) on the side opposite to the diagonal collapse direction (Y).
Are fixed by welding, and a plurality of jacks 6 of the member 5 and the foundation concrete 4 are installed.
(d) 柱(B)の下部の撤去 斜め倒壊方向(Y)の側にある柱(B)は、倒壊の支障となり
方向性を損なうために、第３図に示す如く脚部を所定の
高さまで撤去７する。(d) Removal of the lower part of the pillar (B) The pillar (B) on the side of the diagonal collapse direction (Y) interferes with the collapse and impairs the directionality. Now remove 7.
(e) 柱(A)，(C)，(D)及び煙突(E)の切断 柱(A)，(C)の切断８は、第５図に示す如く補強材２と、
基礎コンクリート４との接線に於いて行う。この場合の
柱(A)，(C)の切断は、第４図の如く不連続切断（ミシン
目）９とする。これは、一部接続部を残しておくことに
より柱脚部の水平力に抵抗させるためのものである。(e) Cutting of pillars (A), (C), (D) and chimney (E) Cutting of pillars (A), (C) is performed with the reinforcing material 2 as shown in FIG.
It is done at the tangent to the foundation concrete 4. In this case, the pillars (A) and (C) are cut into discontinuous cuts (perforations) 9 as shown in FIG. This is to resist the horizontal force of the column base by leaving a part of the connecting portion.
煙突(E)（高さ２１０ｍ・直径４．５ｍ）も第６図に例
示する如く、下部を切断１０する。尚、第５図・第６図
中１１は、斜め倒壊側に設けたクサビ状の切り欠き部
で、倒壊時に座屈を発生させないためのものである。一
方、柱(D)についても第７図に示す如く切断１２する。The lower part of the stack (E) (height 210 m, diameter 4.5 m) is also cut 10 as illustrated in FIG. Reference numeral 11 in FIGS. 5 and 6 is a wedge-shaped notch provided on the obliquely collapsed side for preventing buckling during collapse. On the other hand, the pillar (D) is also cut 12 as shown in FIG.
(f) 柱(D)のジャッキアップ 以上の工程を経て、いよいよ倒壊作業に入るものであ
り、第７図に示したジャッキ６の作用により押し上げ力
受け部材５を介して柱(D)を押し上げると、柱(A)，(C)
を支点として全体が所定の方向(Y)へ方向性良く倒壊す
る。(f) Jack-up of pillar (D) After going through the above steps, it is finally time to start collapsing work. The pillar 6 (D) is pushed up by the action of the jack 6 shown in FIG. And pillars (A), (C)
With the fulcrum as a fulcrum, the whole collapses in a prescribed direction (Y) with good directionality.
本発明の倒壊工法の実施例は、上記の通りであり、斜め
倒壊側の柱(B)の下部を撤去して柱(A)，(C)を支点とし
て倒壊することにより、方向性良く所定の方向(Y)へ倒
壊することが出来る。The embodiment of the collapsing method of the present invention is as described above, and by removing the lower part of the pillar (B) on the obliquely collapsing side and collapsing the pillars (A) and (C) as fulcrums, the directionality can be predetermined. You can collapse in the direction of (Y).
更に、倒壊の支点となる柱(A)，(C)の脚部に、斜め倒壊
方向(Y)と平行に補強材２を設けて柱(A)，(C)と溶接
し、接合個所より下部に於いて柱(A)，(C)を切断してい
るので倒壊時(A)，(C)に座屈を生じることがなく、ま
た、２本の柱が同時に傾動することになり、倒壊方向性
の信頼度が大きく向上するものである。Furthermore, the reinforcements 2 are provided in parallel with the diagonal collapse direction (Y) on the legs of the pillars (A) and (C), which are the fulcrum of collapse, and welded to the pillars (A) and (C). Since the columns (A) and (C) are cut at the bottom, buckling does not occur at the time of collapse (A) and (C), and the two columns will tilt simultaneously. The reliability of the collapse direction is greatly improved.
上記の実施例は、本発明の最良の工法を示したものであ
るが、例えば、倒壊の起動力として、柱(D)の押し上げ
に加えて、ワイヤーロープ等で引っ張ることを付加して
も良い。更に、柱(A)，(C)に接合する補強材２は必要に
応じて施すものである。The above embodiment shows the best construction method of the present invention, but for example, as a starting force for collapse, in addition to pushing up the pillar (D), pulling with a wire rope or the like may be added. . Further, the reinforcing material 2 joined to the columns (A) and (C) is provided as needed.
尚、上記説明では、構造物として煙突の倒壊を示した
が、煙突の倒壊に限定されることなく、その他の構造物
〔例えば、高架水槽（第８図）・鉄塔・架台等〕の場合
にも本発明の工法が適用出来ることは言うまでもない。In the above description, the collapse of the chimney was shown as the structure, but the structure is not limited to the collapse of the chimney, and in the case of other structures (for example, elevated water tank (Fig. 8), steel tower, pedestal, etc.) Needless to say, the method of the present invention can be applied.
以上の如く本発明によれば、４本の柱で支持された構造
物を安全、且つ経済的で短工期に、しかも、方向性良く
倒壊出来るものである。As described above, according to the present invention, a structure supported by four pillars can be collapsed safely, economically, in a short construction period, and with good directionality.
【図面の簡単な説明】 図面は本発明の実施例を示したものであるが、第１図は
４本柱で支持された煙突の立面図、第２図は倒壊方向を
示す平面図、第３図は本発明工法の、実施状況の説明
図、第４図及び第５図は補強材の取り付け及び、柱切断
を示す断面図と立面図、第６図は煙突の切断を示す立面
図、第７図は柱(D)の下部に設けたジャッキの立面図、
第８図(イ)，(ロ)は高架水槽及びその倒壊方向を示す立面
図と平面図である。 (A)，(B)，(C)，(D)……柱、(E)……煙突 ２……補強材、５……押し上げ力受け部材 ６……ジャッキ、７……柱(B)の撤去部 ８，１０，１２……切断部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. FIG. 1 is an elevation view of a chimney supported by four pillars, and FIG. 2 is a plan view showing the collapse direction. FIG. 3 is an explanatory view of an implementation state of the method of the present invention, FIGS. 4 and 5 are sectional views and elevation views showing attachment of a reinforcing material and pillar cutting, and FIG. 6 is a standing view showing cutting of a chimney. Fig. 7 is an elevational view of the jack installed at the bottom of the pillar (D).
8 (a) and 8 (b) are an elevation view and a plan view showing the elevated water tank and its collapse direction. (A), (B), (C), (D) …… Column, (E) …… Chimney 2 …… Reinforcement material, 5 …… Pushing force receiving member 6 …… Jack, 7 …… Column (B) Removal part 8, 10, 12 ... Cutting part
Claims (2)
の下部を切断すること、 他方の対角線上の２本の柱のうち、１本の柱の脚部を撤
去し、他の１本の柱の下部を切断すること、 を、任意の順序で行い、 上記倒壊の支点となる２本の柱を支点として、脚部を撤
去した柱の方向へ倒壊させること、 よりなる、４本柱で支持された構造物の倒壊工法。1. In a structure supported by four pillars, the lower part of two pillars, which are fulcrums of collapse on one diagonal in a plan view, are cut off, and two on the other diagonal. Of the pillars, remove the leg of one pillar and cut the bottom of the other pillar in any order, and use the two pillars that are the fulcrum of the collapse as the fulcrum. The method of collapsing a structure supported by four pillars consists of collapsing the legs in the direction of the pillar.
材を接合する特許請求の範囲第(1)項記載の４本柱で支
持された構造物の倒壊工法。2. A method for collapsing a structure supported by four pillars according to claim (1), wherein a reinforcing material is joined to the lower portions of the two pillars which are the fulcrums of collapse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15760486A JPH0633684B2 (en) | 1986-07-04 | 1986-07-04 | Method of collapsing structures supported by four columns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15760486A JPH0633684B2 (en) | 1986-07-04 | 1986-07-04 | Method of collapsing structures supported by four columns |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6314962A JPS6314962A (en) | 1988-01-22 |
| JPH0633684B2 true JPH0633684B2 (en) | 1994-05-02 |
Family
ID=15653355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15760486A Expired - Lifetime JPH0633684B2 (en) | 1986-07-04 | 1986-07-04 | Method of collapsing structures supported by four columns |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0633684B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0427375Y2 (en) * | 1986-03-13 | 1992-07-01 | ||
| JP4790357B2 (en) * | 2005-09-21 | 2011-10-12 | ベステラ株式会社 | Depressing method of regenerative furnace of hot stove |
| JP4828314B2 (en) * | 2006-06-09 | 2011-11-30 | ベステラ株式会社 | Method of defeating steel tower supported chimney structure |
-
1986
- 1986-07-04 JP JP15760486A patent/JPH0633684B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6314962A (en) | 1988-01-22 |
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