JPH02120477A - Technique of remodeling chimney already constituted - Google Patents
Technique of remodeling chimney already constitutedInfo
- Publication number
- JPH02120477A JPH02120477A JP27317888A JP27317888A JPH02120477A JP H02120477 A JPH02120477 A JP H02120477A JP 27317888 A JP27317888 A JP 27317888A JP 27317888 A JP27317888 A JP 27317888A JP H02120477 A JPH02120477 A JP H02120477A
- Authority
- JP
- Japan
- Prior art keywords
- chimney
- existing chimney
- inner cylinder
- existing
- internal cylinder
- 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
- 238000000034 method Methods 0.000 title claims description 19
- 238000007634 remodeling Methods 0.000 title claims description 8
- 230000007797 corrosion Effects 0.000 claims abstract description 15
- 238000005260 corrosion Methods 0.000 claims abstract description 15
- 238000010276 construction Methods 0.000 claims abstract description 8
- 239000007769 metal material Substances 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 230000004048 modification Effects 0.000 claims description 7
- 238000012986 modification Methods 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 abstract 1
- 239000004567 concrete Substances 0.000 description 18
- 239000000463 material Substances 0.000 description 13
- 230000006866 deterioration Effects 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 239000002585 base Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000008439 repair process Effects 0.000 description 5
- 230000035515 penetration Effects 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000011433 polymer cement mortar Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009418 renovation Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 244000145845 chattering Species 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- WYROLENTHWJFLR-ACLDMZEESA-N queuine Chemical compound C1=2C(=O)NC(N)=NC=2NC=C1CN[C@H]1C=C[C@H](O)[C@@H]1O WYROLENTHWJFLR-ACLDMZEESA-N 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は既設煙突、特に鉄筋コンクリートあるいは鋼板
製の既設煙突の改造工法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for remodeling an existing chimney, particularly an existing chimney made of reinforced concrete or steel plate.
［従来の技術］
般に、鉄筋コンクリート造＜ ＩＩ Ｃ）あるいは鋼板
製の煙突では、筒体内壁にう・ｒニングを施しており、
ライニング形式としては耐火しンガ、耐酸し・ンガある
いは抗火石を積み七けたブロック積み−１げ構造とする
場合と、吹き付けによってガナ（ｈやキャスタブルを何
首させる場合笠がある。[Prior Art] In general, in chimneys made of reinforced concrete or steel plates, the inner wall of the cylinder is provided with linings.
Lining types include fireproof linings, acid resistant linings, or fireproof stones stacked in a seven-layer block structure, and linings made of sprayed ganas (h) or castable stones.
ところで、煙突の稼動が長期に及ぶと、自然発生的な経
年劣化により煙突のライニング部分及びｔ１′７ｉ体部
分に傷みが生じる２、すなわち、これらの傷みは地震、
風、排ガス、温度応力、塩害、アルカ」骨材反応、ｆｖ
ｌ、浸等の外的要因に起因するものであり、煙突のライ
ニング部分及び筒体部分にその；）１？が見られ、また
湿式排脱装置や燃料転換に伴う煙突排ガス温度の低Ｆや
腐食性排ガスの通煙等使用条件に起因するものであって
、煙突のライニング部分にその影響が見られる。By the way, when a chimney is operated for a long period of time, natural deterioration over time causes damage to the lining and body of the chimney.
Wind, exhaust gas, temperature stress, salt damage, alkali reaction, fv
This is caused by external factors such as immersion, and the lining and cylinder part of the chimney are affected;)1? This is also due to usage conditions such as the low F temperature of the chimney exhaust gas associated with the wet exhaust system and fuel conversion, and the passage of corrosive exhaust gas, and its effects can be seen on the lining of the chimney.
具体的に云えば、°煙突のライニング部では、摩耗や欠
けによる所要ライニング厚の不足、ブロック積みｌ二げ
工法における目地材の消失、地震や風によるライニング
材のわれ、欠け、剥落、温度応力によるライニング材の
われ、欠け、酸の浸透によるライニング押え鉄筋の発錆
及びライニング材の表面剥落、酸の浸透による１：′ｌ
地材の劣化、酸露点腐金によろうイニング材の腐食、劣
化、剥落、腐資性排ガスによるライニング材の腐食、劣
化、￥り落等である。また、煙突のコンクリート部では
、コンクリートの中性化、地震や風によるコンクリート
の表面剥落、折損、排ガスによるコンク）−４の腐食、
劣化、剥落、温度応力によるコンクリートのびびわね、
塩分浸透による鉄筋の発錆、：〕シクリートのびびねれ
及び剥落、アルカリ骨材反応によるコンクリートのひび
われ及び剥落、酸の浸透による内面の腐食、劣化、剥落
１等である。Specifically, in the lining of a chimney, the required lining thickness is insufficient due to wear and chipping, the loss of joint material in the block stacking method, cracking, chipping, and peeling of the lining material due to earthquakes and wind, and temperature stress. cracking and chipping of the lining material, rusting of the lining reinforcing bars due to acid penetration, and surface peeling of the lining material, 1:'l due to acid penetration.
These include deterioration of the base material, corrosion, deterioration, and flaking of the brazing material due to acid dew point corrosion, and corrosion, deterioration, and flaking of the lining material due to corrosive exhaust gas. In addition, in the concrete part of the chimney, carbonation of concrete, surface peeling and breakage of concrete due to earthquakes and wind, corrosion of concrete due to exhaust gas (4),
Concrete cracks due to deterioration, flaking, and temperature stress,
Rust of reinforcing bars due to salt penetration: Chattering and flaking of ciclete, cracking and flaking of concrete due to alkali aggregate reaction, corrosion, deterioration, and flaking of the inner surface due to acid penetration, etc.
なお、煙突内」二部はど排ガスが冷却されて酸性トレー
ンが生じ易く、したがって浸食による傷みが（］二じ易
くなり、特に、超高層煙突では排ガスの冷却期間が長い
ため、排ガスが湯冷され易くなって煙突り部の傷みも激
しくなる傾向にある。In addition, in the two parts of the chimney, the exhaust gas is likely to be cooled and acidic trains are formed, which makes it more likely to be damaged by erosion.Especially in high-rise chimneys, the cooling period for the exhaust gas is long, so the exhaust gas is cooled by hot water. Chimneys tend to become more susceptible to damage and damage to the chimney becomes more severe.
そして、ＲＣ煙突のライニング部分及びコンクリート部
分が傷むと、その補修が必要となるが、＾１１修又は改
修（改造）方法としては１次のようなものがある。If the lining and concrete parts of the RC chimney are damaged, they will need to be repaired, but there are 11 repair or modification (modification) methods as follows.
まず、煙突のライニング部において、ブロック系ライニ
ング材の場合には、既設ブロックを撤去した後、新しい
ブロックを１ｊ′！上げる。また吹き付は系ライニング
材の場合には、既設ライニングを’＋’而又は全面撤去
してから吹き替える。First, in the case of block-based lining material for the lining part of the chimney, remove the existing block and then install a new block 1j'! increase. In addition, in the case of spray-based lining materials, the existing lining must be completely removed or the existing lining must be completely removed.
次に煙突のコンクリート部において、ひびわね補修につ
いては、有機系材料を用いて補修する場合のｌ゛法には
、注入工法（ひびわれ部にエポキシ樹脂注入）、充填に
法（ひびわれ部を【Ｊカット又はＶカット後シーリング
材充填）、塗（ｆ’ｉ ’Ｊ′、法（ひびわれ表面に弾
性エポキシ樹脂塗布）があり、 ＋ｉｊｊ磯系祠料を用
いて補修する場合にはこて塗り工法（びびわれｙｅｓ
ＩＪカットを又は■カット後ポリマーセメントモルタル
をごて塗り）がある。またコンクリートのひびわれが鉄
筋位置まで達している場合やコンクリートが中性化（場
合によっては酸性化）している場合には、コンクリート
を鉄筋位１６まで研り、ケレンを？ｊなった後、鉄筋に
防錆材（・般錆１１−め塗料、イ１機ｒ！！料、ポリマ
ーセメントモルタル′７７）を塗布する。またコンクリ
ート表面に浸透性の高い（イ料を塗布して鉄筋のアルカ
リ性の回復を、０図したＪ−法もある。Next, regarding the repair of cracks in the concrete part of a chimney, there are two methods for repairing cracks using organic materials: the injection method (injecting epoxy resin into the cracks), the filling method (filling the cracks with Filling with sealant after J-cut or V-cut), coating method (applying elastic epoxy resin to the cracked surface), and trowel coating method when repairing using +ijj iso-based abrasive material. (I'm scared yes
There is an IJ cut or ■ After the cut, apply polymer cement mortar with a trowel). Also, if cracks in the concrete reach the reinforcing bars or if the concrete has become neutral (or acidic in some cases), grind the concrete to the reinforcing bar level 16 and clean it. After this, apply a rust preventive material to the reinforcing bars (general rust paint, paint, polymer cement mortar '77). There is also the J-method, which restores the alkalinity of reinforcing bars by applying a highly permeable paint to the concrete surface.
なお、コンクリートの劣化及び損傷が広範囲に発’ｔ”
、 Ｌ、通常の補修のみでは構造耐力の回復に疑問があ
る場合、また、：］ンクリートの部分剥落が著しい場合
などには鉄板や鋼製リングをコンクリートに巻き付けて
補強する。Furthermore, concrete deterioration and damage occurred over a wide area.
, L. If there is any doubt that the structural strength will be restored with normal repairs, or if parts of the concrete are severely peeled off, wrap iron plates or steel rings around the concrete to reinforce it.
［発明が解決しようとする課題］
しかしながら１．Ｌ記従来の改造方法では、いずれも１
？０煙突等の改修原因の要因に対する根本的な対策がな
されるとは云い得す、いずれ同様なさらに大規模な改修
［事を繰り返して行なわなければならない。[Problems to be solved by the invention] However, 1. In the conventional modification method, all 1
? Although it can be said that fundamental measures are taken to address the causes of renovations such as chimneys, similar larger-scale renovations will eventually have to be repeated.
また、１″、記各種の１法を１試みてもコンクリートの
剛性を高めることができず、耐ｉ５強度が不足していて
人きな地震が起こると煙突の倒壊°［故が発生する専の
問題がある。In addition, even if one of the various methods described in 1. There is a problem.
さらに、そもそも煙突設計強度ヒの問題もある９例えば
、第６図に図示するよう番こ、煙突の高さと曲げモーメ
ントとの関係に関する建築基準法が改＋ｌＥされたとい
う経緯があり、１１」設計基準（昭和２；３年施行）に
よる基準は新設置Ｎ基準（昭和５６年施行）に比べ、煙
突の中・を部の設計基準（ｔｌ’ｊが緩くなっており、
逆に云えば新建築基準法の）１つが煙突の中・１一部で
従前よりきつい基準値を採用しているものである。これ
は、近時、大地震の際に煙突が−Ｌ一部、それも１１部
から１／３位で折損−・１−る°１１故が相次いだため
、設置Ｃ１基へ畦値の見直しがなされた結果である。し
たがって、古い基Ｑ （＋＋’ｉで建築された煙突では
、たとえその補修を実施したとしても、而・１震強度に
問題を抱えているという欠点がある。Furthermore, there is also the problem of poor chimney design strength9.For example, as shown in Figure 6, the Building Standards Act regarding the relationship between chimney height and bending moment has been amended, and 11" Compared to the new installation N standards (enforced in 1982), the standards based on the standards (enacted in 1932) have looser design standards (tl'j) for the inside and outside of chimneys.
Conversely, one of the new Building Standards Laws has adopted stricter standard values for some chimneys than before. This is because recently, during a large earthquake, there were a number of accidents in which part of the chimney L was broken at about 1/3 of the 11th part. This is the result of what was done. Therefore, even if the chimneys built in the old base Q (++'i) are repaired, they still have the disadvantage of having a problem with their one-seismic strength.
本発明は上記従来技術の欠点を解決するものであり、煙
突の耐食゛、耐熱、耐震強度を増大せしめ、Ｊ−費が安
く、保守管理も簡単な煙突に改造する［−法を提供する
ことを目的とする。The present invention solves the above-mentioned drawbacks of the prior art, and provides a method for improving the corrosion resistance, heat resistance, and seismic strength of a chimney, and remodeling the chimney into a chimney that is inexpensive and easy to maintain. With the goal.
［課題を解決するためのｆ段］゛
本発明の既設煙突の改造工法は、鉄筋コンクリ−ト叉は
鋼板からなる既設煙突の上部部位を切除し、該既設煙突
の基部内側のベース−Ｌに耐食性金属材からなる筒体ブ
ロックを固設し、かつ既設煙突内に複数個の筒体ブロッ
クを連結しながら積みｌ−ばて既設煙突の頂部より突出
させることにより内筒な形成するとともに、内筒の外壁
と既設煙突の内壁との間に内筒な既設煙突に支持する支
持部＋イを配設し、かつ、内筒のＪ！部に煙路口を接続
することを特徴とする。なお、内筒の既設煙突のｒｎ都
よりの突出長は少なくとも既設煙突の切除した良さにす
ることが望ましく、さらに、切除した既設煙突の１１１
部に、既設煙突の内壁と内筒の外壁との間に生じる隙間
を覆うカバーを配設する工程を加えることが好ましい、
［実 施 例］
以下、本発明を図面に基つき実施例をもって説！１１す
る。[Step F to solve the problem] ゛The method for remodeling an existing chimney of the present invention is to remove the upper part of the existing chimney made of reinforced concrete or steel plate, and attach it to the base L inside the base of the existing chimney. A cylindrical block made of a corrosion-resistant metal material is fixed, and a plurality of cylindrical blocks are connected and stacked inside an existing chimney to protrude from the top of the existing chimney, thereby forming an inner cylinder. A support part + A for supporting the existing chimney, which is an inner cylinder, is arranged between the outer wall of the cylinder and the inner wall of the existing chimney, and the J! It is characterized by connecting a flue outlet to the part. In addition, it is desirable that the protrusion length of the inner cylinder from the RN capital of the existing chimney is at least as long as the length of the existing chimney that was removed, and furthermore,
It is preferable to add a step of installing a cover to cover the gap that occurs between the inner wall of the existing chimney and the outer wall of the inner cylinder. ! 11.
第１図は１本発明の工法により改造した煙突を小ずもの
であり１図において、１は鉄筋コンクリート造の既設煙
突であり、２は耐食性金属材からなる内筒、３は煙路［
１，４は支持材、５はカバーである。ＩＯは大地、１１
は基礎（ベース）を小す５
本発明工法では概略、既設煙突１の上部を所定の・Ｙ法
だけ切除して煙突１の高さを低くするＬ稈と、既設煙突
１内の内筒２を構築する工程、あるいはそれに付随する
−し程、すなわち内筒２に煙路１Ｍ３を接続したり、支
持材４やカバー５を取付けるＩ５程笠を含む。Figure 1 shows a chimney remodeled using the construction method of the present invention. In Figure 1, 1 is an existing chimney made of reinforced concrete, 2 is an inner cylinder made of corrosion-resistant metal, and 3 is a flue.
1 and 4 are supporting members, and 5 is a cover. IO is the earth, 11
In general, the construction method of the present invention reduces the height of the chimney 1 by cutting off the upper part of the existing chimney 1 in a predetermined Y direction to reduce the height of the chimney 1, and the inner cylinder 2 inside the existing chimney 1. The process of constructing or the steps associated therewith, that is, connecting the flue 1M3 to the inner cylinder 2 and attaching the support member 4 and the cover 5, includes the step I5.
以下、順に説明すると２改造の対象となる既設煙突１は
その躯体コンクリート１△の内壁にライニング材＋ １
３が施されており、改造前にあっては、第１図の鎖線が
示す高さを何するものである。本発明ＩＬ法では、まず
既設煙突玉の上部を破壊し切除するものである。この場
合、鎖線で示す除去部分の・↑法１．１よ、当初の高さ
の１７４ないし１／′３程度のものとするのがよい１．
すなわち、既設煙突の１は内筒２を支持するために利用
するので、寸法ｌ、が長すぎ残った部分の高さが低いと
支持しにくくなり、また−１法１．が短かすぎると、後
述するような理由から耐震強度の点であまり改１９され
ない。To explain in order below, the existing chimney 1 that is subject to modification 2 has lining material + 1 on the inner wall of its concrete frame 1△.
3 has been applied, and what is the height shown by the chain line in Fig. 1 before modification? In the IL method of the present invention, the upper part of the existing chimney is first destroyed and removed. In this case, the height of the removed portion shown by the chain line should be approximately 174 to 1/'3 of the original height according to Method 1.1.
That is, since the existing chimney 1 is used to support the inner cylinder 2, if the dimension 1 is too long and the height of the remaining part is low, it will be difficult to support it. If the length is too short, the seismic strength will not be improved much for reasons explained below.
既設煙突１のＬ部部位を切除した後に、既設煙突１の内
側に垂直に立てて別個に煙道を構築する１、これは第２
図に示すよ′）に、上部の除去工事を終えた既設煙突１
の頂部１ａの内径より小さい外径で、 一定の長さを有
する耐食性金属材からなる筒体ブロック６をクレーン１
２で吊り１−げ、既設煙突Ｉのｒａ部１ａの排煙［］１
ｂより煙突１内に入れ、煙突１の基部ＩＣから順に連結
しながら積み１−げ 本の内筒２に形成するものである
。After removing the L portion of the existing chimney 1, a separate flue is constructed by standing vertically inside the existing chimney 1. This is the second chimney.
As shown in the figure'), the existing chimney 1 after the upper part removal work has been completed.
A cylindrical block 6 made of a corrosion-resistant metal material having an outer diameter smaller than the inner diameter of the top portion 1a and a certain length is mounted on the crane 1.
Suspend the smoke from the ra part 1a of the existing chimney I by hanging it with 2 []1
It is inserted into the chimney 1 from b and is connected in order from the base IC of the chimney 1 to form the inner cylinder 2 of the pile.
１ｉ−１食性金属材としてはステンレス材が適当であり
、ステンレス鋼板からなる筒体ブロック６の最ト部のも
のには、第３図のように底板７を設け。1i-1 Stainless steel is suitable as the edible metal material, and the topmost part of the cylindrical block 6 made of a stainless steel plate is provided with a bottom plate 7 as shown in FIG.
こねをベースＩ １１．にアンカーボルト８にてｔ、’
賃＋定する１、そして、筒体ブロック６は複数個を端面
を突き当て、円周溶接して樽ぎ足して少なくとも既設煙
突１の当初の高さに相当する高さまで積み一］−げる。Knead base I 11. At anchor bolt 8, t,'
Then, a plurality of cylindrical blocks 6 are brought together with their end faces pressed together, welded circumferentially, and added to the barrels to a height that is at least equivalent to the original height of the existing chimney 1. .
ずなわち、既設煙突１の１一部切除寸法Ｉ６たけ内筒２
を既設煙突１の頂部１ａのＬ方へ突出させるものである
４、第１図の場合は改造＋３ｉｉ後で煙突の高さは変わ
らないが、適宜内筒２の高さを変えて煙突高さを調整す
ることとしてもよい。In other words, 1 part of the existing chimney 1 has been removed with dimensions I6 and inner cylinder 2.
4. In the case of Figure 1, the height of the chimney will not change after modification + 3ii, but the height of the inner cylinder 2 will be changed as appropriate to increase the height of the chimney. It is also possible to adjust the
なお、内筒２を構成する？ＸＩ数個の筒体ブロック６は
それらが全部間 長さである必要はなく、長さの異なる
ものを組み合わせてもよい。In addition, what constitutes the inner cylinder 2? The several cylindrical blocks 6 do not have to all have the same length, and blocks of different lengths may be combined.
また、内筒２のＦ部には煙路口３を接続する。Furthermore, a flue outlet 3 is connected to the F section of the inner cylinder 2.
４は内筒２を煙突１で支持するための支持部材であって
、内筒２の円周方向に等間隔で複数個設け、かつ、これ
を高さ方向の複数箇所に設ける。Reference numeral 4 denotes a support member for supporting the inner cylinder 2 on the chimney 1, and a plurality of support members are provided at equal intervals in the circumferential direction of the inner cylinder 2, and at a plurality of locations in the height direction.
支持子イ部４は内筒２と同様に耐食性金属材からなり、
内筒２の外周に溶接により配設する。支持部（１４の先
端は煙突１の内壁に摺動６丁能に突き当てたり、若（二
の隙間９をあけておき（第４図）、内筒２の熱伸縮に対
応できるようにしである。なお、支持部材４は内筒２を
構築する過程で適所に設けていく。The support part 4 is made of a corrosion-resistant metal material like the inner cylinder 2,
It is arranged on the outer periphery of the inner cylinder 2 by welding. The tip of the support part (14) should be placed in a sliding position against the inner wall of the chimney 1, or the tip of the support part (14) should be pressed against the inner wall of the chimney 1 with a gap 9 (see Fig. 4) to accommodate the thermal expansion and contraction of the inner cylinder 2. Note that the support member 4 is provided at an appropriate location during the process of constructing the inner cylinder 2.
５はカバーであって、煙突ｌのｒｎ部１ａで煙突１の内
壁と内筒２の外壁との間に（Ｊ−しる隙間１３をｌ、／
ｊから覆い煙突１内に山水等の侵入を防＋、ｈするもの
である。カバー５も耐食性金属材等とすることが好まし
く２内筒２側に溶接で取付ける（第５図）。Reference numeral 5 denotes a cover, which has a gap 13 between the inner wall of the chimney 1 and the outer wall of the inner cylinder 2 at the rn part 1a of the chimney l (J-).
This is to prevent water from entering the chimney 1 by covering it from j to h. The cover 5 is also preferably made of a corrosion-resistant metal material and is attached to the inner cylinder 2 side by welding (Fig. 5).
ここで、本発明工法で改造した既設煙突と改造＋ｉｉ＋
のものとの地震時応力について述べると、第６図におい
て、煙突高さと曲げモーメントとの関係に関し、△は改
造ｔｉｌの地震＋＋１４ ｙｌ−・力（新基準）、Ｂは
改造前の地震応力（旧基準）、Ｃは改造後の池）、°４
時応力なボすものである。ここで示すように、煙突Ｉの
−に部を除去することで、煙突１の地震時応力が小さく
なり、耐震強度が増大することがわかる。また、本発明
工法による改造で、新基’？、 （ｌｌ’＋１３を１分
に満たし、地震に対し大きな補強がなさＪすることもわ
かる１゜
なお、ｔｙ突ｒｎ部の排煙「１の径が大きいほど、圧ｔ
ｉ１か少なくなって排煙能力がアップする。 ・方でＩ
Ｃ煙突では構造」−高さ方向に先細り形状を呈してい
るー したがって適当な長さだけ煙突のＬ部を除去−４
゛れば、煙突頂部の排煙Ｉ−１の内径は以１１勺より大
きくなる。このため、その内側に内筒２を通しても従来
より大きな１」径の煙突に１１Ｘ４−けることができ、
この点で排煙能力増大になる。。Here, the existing chimney modified using the construction method of the present invention and the modified +ii+
Regarding the stress during earthquakes, in Figure 6, regarding the relationship between chimney height and bending moment, △ is the earthquake + + 14 yl- force (new standard) for the modified til, and B is the earthquake stress before the modification ( old standard), C is the pond after remodeling), °4
It's a stressful time. As shown here, it can be seen that by removing the - portion of the chimney I, the stress during an earthquake in the chimney 1 is reduced and the seismic strength is increased. In addition, by remodeling using the construction method of the present invention, a new base'? , (ll'+13 is filled in 1 minute, and it can be seen that there is no major reinforcement against earthquakes.
i1 decreases and smoke evacuation ability increases.・In the direction I
In the case of chimney C, the structure is tapered in the height direction.Therefore, remove the L part of the chimney by an appropriate length-4
If so, the inner diameter of the smoke exhaust I-1 at the top of the chimney will be larger than 11 mm. For this reason, even if the inner cylinder 2 is inserted inside it, it is possible to fit into a chimney with a diameter of 1", which is larger than the conventional one.
At this point, the smoke evacuation capacity will be increased. .
前述の実施例では鉄筋コンクリート造の既設煙突につい
て説明したが、本発明工法は鋼板製の既設煙突について
も同様に実施することもできる。。In the above-mentioned embodiment, an existing chimney made of reinforced concrete was explained, but the construction method of the present invention can also be applied to an existing chimney made of steel plate. .
１作 用コ
本発明のＬ法では、既設煙突の１一部部位を切除−・す
ることにより２該既設煙突は、その１ｌｉｌ震応力が少
なくなるよう改ρされる。この１１部部位を切除した既
設煙突は内筒な支持するために利用できる。また、既設
煙突の上部部位は切除されるが、内筒がその既設煙突の
頂ＨＸｆＳより上方へ突出するので、煙突の高さについ
ては切除した分を補うことができる。さらに、内筒は耐
食性金属材からなり、酸性ドレーンによって侵食されず
、耐熱性もよい。1. Effect: In the L method of the present invention, by cutting out a part of the existing chimney, the existing chimney is modified so that its 1 lil seismic stress is reduced. The existing chimney with 11 parts cut out can be used for internal support. Furthermore, although the upper part of the existing chimney is removed, the inner cylinder protrudes above the top HXfS of the existing chimney, so the height of the chimney can be compensated for by the amount removed. Furthermore, the inner cylinder is made of a corrosion-resistant metal material, is not corroded by acid drain, and has good heat resistance.
［発明の効果］
以１−述べたように、本発明に法によれば、従来１法に
見られるような間に合わせの政修と異なり、既設煙突を
耐震性や耐食性あるいは耐熱性に優れた！１４造に根本
から生まれ変らせることができ、へｉ検、管理も容易で
ある。[Effects of the Invention] As described in 1-1, according to the law of the present invention, unlike the makeshift government repairs seen in the conventional law 1, it is possible to improve existing chimneys with superior earthquake resistance, corrosion resistance, or heat resistance. ! It can be fundamentally reborn into a 14-story structure, and is easy to inspect and manage.
また、従来４′、法に見られるような、煙突のコンクリ
ート部分及びライニング材部分にそれぞれ面倒な改修上
′ｌ−を行なうものと異なり、既設煙突の」゛部部位を
切除し、既設煙突内に内心７１を配設すればよいから［
−事が比較的筒ｒ１５．で短期間ででき工費も安くなる
等の効果も奏することができる。In addition, unlike the conventional method of repairing the concrete part and the lining material part of the chimney as seen in the 4' Act, which requires troublesome repairs to the concrete part and lining material part of the chimney, it is possible to cut out the part of the existing chimney and install it inside the existing chimney. All you have to do is place 71 inside [
- Things are relatively cylindrical R15. It can be done in a short period of time and has the advantage of reducing construction costs.
第１図は本発明上法て施１［シた煙突の１−Ｅ面断面図
、第２図は本発明１−法の説明図、第３図ないし第５図
は１本分説明図、第６図は煙突の地震時応力に関するグ
ラフである。
〜既設煙突
２〜内筒
３〜煙路１−」
４〜 メリミ持ト、１
５〜カバー
６〜筒体ブロック
１１〜へ−スFig. 1 is a 1-E cross-sectional view of a chimney stack according to the present invention, Fig. 2 is an explanatory diagram of the method of the present invention 1, Figs. Figure 6 is a graph regarding the stress of the chimney during an earthquake. ~ Existing chimney 2 ~ Inner cylinder 3 ~ Flue duct 1 -'' 4 ~ Merimi holder, 1 5 ~ Cover 6 ~ Cylinder block 11 ~ Head
Claims (3)
部部位を切除し、該既設煙突の基部内側のベースをに耐
食性金属材からなる筒体ブロックを固設し、かつ既設煙
突内に複数個の筒体ブロックを連結しながら積み上げて
既設煙突の頂部より突出させることにより内筒を形成す
るとともに、内筒の外壁と既設煙突の内壁との間に内筒
を既設煙突に支持する支持部材を配設し、かつ、内筒の
基部に煙路口を接続することを特徴とする既設煙突の改
造工法。(1) The upper part of the existing chimney made of reinforced concrete or steel plate is removed, a cylindrical block made of corrosion-resistant metal material is fixed to the base inside the base of the existing chimney, and multiple cylindrical blocks are installed inside the existing chimney. An inner cylinder is formed by stacking the blocks while connecting them and protruding from the top of the existing chimney, and a support member is placed between the outer wall of the inner cylinder and the inner wall of the existing chimney to support the inner cylinder to the existing chimney. , and a method for remodeling an existing chimney, characterized by connecting the flue opening to the base of the inner cylinder.
とも既設煙突の切除した長さにする請求項１に記載の既
設煙突の改造工法。(2) The method for remodeling an existing chimney according to claim 1, wherein the length of the inner cylinder protruding from the top of the existing chimney is at least the length of the existing chimney removed.
内壁と内筒の外壁との間に生じる隙間を覆うカバーを配
設する請求項１又は２のいずれかに記載の既設煙突の改
造工法。(3) Modification of an existing chimney according to claim 1 or 2, further comprising disposing a cover on the top of the excised existing chimney to cover a gap created between the inner wall of the existing chimney and the outer wall of the inner cylinder. Construction method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27317888A JPH083291B2 (en) | 1988-10-31 | 1988-10-31 | Reconstruction method of existing chimney |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27317888A JPH083291B2 (en) | 1988-10-31 | 1988-10-31 | Reconstruction method of existing chimney |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02120477A true JPH02120477A (en) | 1990-05-08 |
| JPH083291B2 JPH083291B2 (en) | 1996-01-17 |
Family
ID=17524187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27317888A Expired - Lifetime JPH083291B2 (en) | 1988-10-31 | 1988-10-31 | Reconstruction method of existing chimney |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH083291B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008032309A (en) * | 2006-07-28 | 2008-02-14 | Tokyo Electric Power Co Inc:The | Protecting method and protecting structure of steel chimney cylinder lining material |
| JP2011075146A (en) * | 2009-09-29 | 2011-04-14 | Jfe Steel Corp | Method of renewing steel chimney |
| JP2013163905A (en) * | 2012-02-10 | 2013-08-22 | Mitsubishi Heavy Ind Ltd | Construction method for lining |
| CN104863410A (en) * | 2015-05-21 | 2015-08-26 | 华电电力科学研究院 | Glass steel anti-corrosion chimney |
| CN107023212A (en) * | 2017-04-19 | 2017-08-08 | 中机国能电力工程有限公司 | A kind of corrosion-resistant, antidetonation free-standing steel chimney |
| CN109653525A (en) * | 2018-12-18 | 2019-04-19 | 宁波市镇海怡福莱文化创意有限公司 | The recycling of discarded chimney |
-
1988
- 1988-10-31 JP JP27317888A patent/JPH083291B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008032309A (en) * | 2006-07-28 | 2008-02-14 | Tokyo Electric Power Co Inc:The | Protecting method and protecting structure of steel chimney cylinder lining material |
| JP2011075146A (en) * | 2009-09-29 | 2011-04-14 | Jfe Steel Corp | Method of renewing steel chimney |
| JP2013163905A (en) * | 2012-02-10 | 2013-08-22 | Mitsubishi Heavy Ind Ltd | Construction method for lining |
| CN104863410A (en) * | 2015-05-21 | 2015-08-26 | 华电电力科学研究院 | Glass steel anti-corrosion chimney |
| CN107023212A (en) * | 2017-04-19 | 2017-08-08 | 中机国能电力工程有限公司 | A kind of corrosion-resistant, antidetonation free-standing steel chimney |
| CN109653525A (en) * | 2018-12-18 | 2019-04-19 | 宁波市镇海怡福莱文化创意有限公司 | The recycling of discarded chimney |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH083291B2 (en) | 1996-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gerwick Jr | Construction of prestressed concrete structures | |
| CN106801517B (en) | External reinforcing and reinforcing method for school shed with prefabricated porous plate brick mixed structure | |
| CN111765768B (en) | Refractory material masonry construction method for ignition holding furnace of sintering machine in sintering plant | |
| JPH02120477A (en) | Technique of remodeling chimney already constituted | |
| CN113585351A (en) | Soil covering plane settlement post-cast strip prefabrication advanced reverse order closed construction method | |
| JP5172519B2 (en) | Support for formwork retention | |
| CN107916797B (en) | Construction method for improving bearing performance of old building | |
| CN106968428A (en) | A kind of recoverable version outrigger encorbelment steelframe anchor bolts assemblies and for cantilever steel girder fix construction method | |
| JP2002266503A (en) | Method for repairing and reinforcing steel structural material for existing building structure and structure | |
| US10538383B2 (en) | Protection system for sulfur storage apparatus | |
| CN215760654U (en) | Exposed reinforcement repairing structure for building | |
| AU2021102932A4 (en) | Novel unbonded annular anchor prestressed concrete lining and construction method thereof | |
| CN112412085B (en) | Prestress reinforcing method for repairing expansion drum of box type steel column wall plate | |
| KR100394780B1 (en) | A Repair ethod and Repair tructure of Bridge Pier Mould Construction | |
| JP3875601B2 (en) | Repair method for salt damage to concrete structures | |
| CN104213515B (en) | The method repairing corrugated steel embedded structure with steel fibrous shotcrete | |
| CN112096156A (en) | Reinforced concrete silo, protection method for silo wall of silo and material storage station | |
| CN112302035A (en) | Prefabricated hollow steel pipe concrete supporting member, inner supporting system and construction method | |
| RU2651871C1 (en) | Method of repairing reinforced concrete chimney and device for its implementation | |
| CN220686520U (en) | Waterproof construction is exempted from to wear by roofing slag layer blast pipe | |
| CN111677316A (en) | Construction method for structure reinforcement | |
| JP4315586B2 (en) | Repair method for floating structures | |
| CN113718703B (en) | Assembled deformation self-adaptive wave wall combined structure and construction method thereof | |
| JPH11166398A (en) | Repairing method of covered conduit | |
| CN109667376B (en) | Novel superposed floor system suitable for H-shaped steel beam of steel structure and construction method thereof |