JP2011169088A - Method for stripping mortar or the like - Google Patents

Method for stripping mortar or the like Download PDF

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Publication number
JP2011169088A
JP2011169088A JP2010048345A JP2010048345A JP2011169088A JP 2011169088 A JP2011169088 A JP 2011169088A JP 2010048345 A JP2010048345 A JP 2010048345A JP 2010048345 A JP2010048345 A JP 2010048345A JP 2011169088 A JP2011169088 A JP 2011169088A
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Prior art keywords
extension
mortar
slit
existing mortar
mandrel
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JP2010048345A
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Japanese (ja)
Inventor
Tokuji Shinohara
徳治 篠原
Tomonori Shinohara
友徳 篠原
Hidesuke Yahata
秀介 矢幡
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FIT Co Ltd Japan
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FIT Co Ltd Japan
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Priority to JP2010048345A priority Critical patent/JP2011169088A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To overcome a problem wherein removal of existing mortar or the like in external-internal wall repair reinforcing work is conventionally performed by a chipping method which leads to a situation where vibration, noise and dust caused by striking and breaking causing almost work environment pollution to inhabitants and the neighborhood, with inevitable construction stop while people allowed to stay or live. <P>SOLUTION: The method for stripping mortar or the like is carried out by slitting, and stripping the existing mortar or the like in a portion surrounded by slits without striking. The occurrence of vibration, noise and dust can thereby be suppressed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、既存モルタル等のハツリを低振動低騒音少粉塵とした剥離工法に関する。  The present invention relates to a peeling method in which a chip such as an existing mortar is made with low vibration, low noise and low dust.

リニューアル、リフォーム或いは耐震補強において居ながら即ち住まいながらの工事に要求されるのが低振動、低騒音、無粉塵工法であるが、外壁又は内壁補修補強における既存モルタル、表面コンクリート(既存モルタル等と記載)の剥離は従来ハツリ工法で行われている。  Low-vibration, low-noise, and dust-free construction methods are required for renovation, renovation, or seismic reinforcement while living or living, but existing mortar and surface concrete (existing mortar, etc.) for external wall or inner wall repair reinforcement ) Is conventionally peeled off by a chiseling method.

従来のハツリ工法は、電動、空圧、油圧工具の何れも工具先端の刃先部分で既存モルタル等を打撃することにより既存モルタル等を剥離している。  In the conventional chiseling method, the existing mortar is peeled off by hitting the existing mortar or the like at the cutting edge portion of the tool tip in any of electric, pneumatic and hydraulic tools.

従来のハツリ工法は既存モルタル等をハンマリングして打ち壊しているので、その打撃音が住居人及び近隣に振動、騒音が耳障りとなり、更に打撃剥離する際に生じる粉塵も環境負荷を生じさせている。  The conventional chiseling method is hammering and destroying existing mortars, so that the sound of the impact is damaging to the residents and the neighborhood, and the dust generated when the impact is peeled off also creates an environmental impact. .

本発明は、このような従来工法が有している振動、騒音を極小にし、粉塵発生も極力抑えることを目的とした工法である。  The present invention is a method for minimizing the vibration and noise that such a conventional method has and for suppressing dust generation as much as possible.

本発明は上記目的を達成するために、スリットを入れる第一工程、スリットで囲まれた内側部分に拡張子挿入孔を明ける第二工程、明けられた孔に拡張子を挿入拡開し既存モルタル等を剥離する第三工程を有する工法である。  In order to achieve the above object, the present invention provides a first step for slitting, a second step for opening an extension insertion hole in the inner portion surrounded by the slit, and inserting and expanding the extension into the opened hole to expand the existing mortar. It is a construction method having a third step of peeling off the like.

第一工程は既存モルタル等の剥離する部分に四角形、格子状又円形状に、剥離する厚み相当の深さに切り込みスリットを入れる。四角形又は格子状スリットを入れる工具は回転式のブレードを持つ切削工具で集塵式タイプの使用が好ましい。円形スリットは打撃をしない回転だけのコアドリルを使用する。環境に優しいことを加味すればコアドリル刃先に一般的に使用されている冷却用水ではなく冷却用泡の使用が最適である。このスリットは第三工程で拡張子が既存モルタル等を剥離する際の範囲、大きさを決めるものである。拡張子の拡開が横方向即ち拡開方向に既存モルタル等に亀裂を生じさせる力の及ぶ範囲と、剥離された既存モルタル等の塊を作業者が高所作業で持ち運べる大きさを鑑みてスリットの墨出しを行う。  In the first step, a slit is formed in a part corresponding to the thickness to be peeled into a square, a lattice or a circle in the part to be peeled off such as existing mortar. It is preferable to use a dust collection type tool as a cutting tool having a rotary blade as a tool for inserting a square or lattice slit. The circular slit uses a core drill that only rotates and does not strike. Considering that it is environmentally friendly, it is best to use cooling foam instead of the cooling water generally used for the core drill cutting edge. This slit determines the range and size when the extension peels off the existing mortar in the third step. Slit in consideration of the extent to which the extension of the extension causes a crack in the existing mortar in the horizontal direction, that is, in the expanding direction, and the size that allows the operator to carry the lump of the existing mortar that has been peeled off at high altitude work The ink is drawn out.

第二工程はスリットで区切られたほぼ中央部に第三工程で挿入される拡張子挿入孔明けをする。孔深さはスリットの深さと同程度か若干深め、孔径は拡張子挿入相応とする。孔明け工具は打撃をしない回転だけのコアドリルが好ましく且つ環境に優しいことを加味すればコアドリル刃先に一般的に使用されている冷却用水ではなく冷却用泡の使用が最適である。  In the second step, an extension insertion hole to be inserted in the third step is formed in a substantially central portion delimited by the slit. The hole depth is about the same as or slightly deeper than the slit depth, and the hole diameter is appropriate for the extension insertion. For the drilling tool, it is preferable to use a cooling bubble instead of the cooling water generally used for the core drill cutting edge, considering that a core drill with no rotation is preferable and environmentally friendly.

第三工程は第二工程で明けられた孔に拡張子を挿入拡開し既存モルタル等に横断面向に亀裂を生じさせスリット範囲内で破断させ、スリット範囲内で破断された既存モルタル等の塊を取り除く。拡張子は心棒押出工具の先端に装着され心棒押出工具のピストン運動により押し出される心棒により拡開される。拡張子の拡開により横方向の力を受けた既存モルタル等の塊をより取り除き易くするには、拡張子が拡開した状態で既存モルタル等の塊を心棒押出工具方向即ち剥離方向に持ち上げる作用が働く構成とする。この動きは心棒を拡張子から若干突出させる構成とすることにより得られる。心棒押出工具は電動、空圧、油圧又はそれらの組み合わせの種類を問わない。  The third step inserts and expands the extension in the hole opened in the second step, cracks the existing mortar etc. in the cross-sectional direction, breaks it within the slit range, and blocks the existing mortar etc. broken within the slit range Remove. The extension is expanded by a mandrel that is attached to the tip of the mandrel extrusion tool and pushed out by the piston movement of the mandrel extrusion tool. To make it easier to remove lumps such as existing mortar that have been subjected to lateral force due to the extension of the extension, the action of lifting the mortar lumps such as the existing mortar in the direction of the mandrel extrusion tool, that is, the peeling direction, with the extension expanded Is configured to work. This movement is obtained by making the mandrel slightly protrude from the extension. The mandrel extrusion tool may be of electric, pneumatic, hydraulic, or a combination thereof.

上述したように本発明のモルタル等剥離工法は打撃による既存モルタル等のハツリを行わないので振動、騒音が皆無に等しい。  As described above, the mortar peeling method according to the present invention does not cause crushing of existing mortar or the like due to impact, and thus vibration and noise are completely absent.

また、ハツリ粉塵対策等は必要なく環境に優しい工法である。  In addition, there is no need for measures against chip dust, and this is an environmentally friendly method.

更に、第一工程でスリットを設けるので剥離される塊の大きさは、高所作業壁面でも作業者が持ち運べる程度の大きさにすることが出来、安全工法である。  Furthermore, since the slit is provided in the first step, the size of the lump to be peeled can be made large enough to be carried by the operator even on the work wall at a high place, which is a safety method.

本発明の概要断面図 (1)は第一工程 (2)は第二工程 (3−1)、(3−2)は第三工程 (3−3)モルタル持ち上げ構成作用Outline sectional view of the present invention (1) is the first step (2) is the second step (3-1), (3-2) is the third step (3-3) mortar lifting configuration action 本発明の実施例を示すスリット、拡張子挿入孔位置図Position of slit and extension insertion hole showing an embodiment of the present invention 本発明の実施例を示す拡張子、心棒部分図Extension, mandrel partial view showing an embodiment of the present invention は図3におけるA−A線断面図Is a sectional view taken along line AA in FIG. は本発明の別の実施例を示す拡張子、心棒部分図Is an extension, mandrel partial view showing another embodiment of the present invention は図5におけるB−B断面図Is a BB cross-sectional view in FIG.

以下、本発明の実施の形態を図1に基づいて説明する。  Hereinafter, an embodiment of the present invention will be described with reference to FIG.

第一工程:図1−(1)に示され、既存モルタル等を剥離する厚みまでスリット1を入れる。  First step: As shown in FIG. 1- (1), the slit 1 is inserted to a thickness to peel off the existing mortar and the like.

第二工程:図1−(2)に示され、スリットで囲まれた中心部に拡張子挿入孔2を明ける。孔深さはスリットの深さと同程度か若干深めする。  Second step: As shown in FIG. 1- (2), the extension insertion hole 2 is opened at the center surrounded by the slit. The hole depth should be the same as or slightly deeper than the slit depth.

第三工程:図1−(3)に示され、
図1−(3−1)拡張子挿入孔2に心棒押出工具先端5に装着された拡張子3を挿入
図1−(3−2)拡張子3を心棒押出工具により心棒4を押し出し拡張子3を拡開させ既存モルタルを剥離する。
Third step: as shown in FIG. 1- (3)
Fig. 1- (3-1) Insert extension 3 attached to the tip 5 of the mandrel extrusion tool into the extension insertion hole 2 3 is expanded and the existing mortar is peeled off.

コンクリート造でモルタルが30mm打設されている外壁からモルタルを30mm剥離する実施例を図に基づいて説明する。  An example in which mortar is peeled off by 30 mm from an outer wall made of concrete and mortar placed by 30 mm will be described with reference to the drawings.

第一工程:図2に示される格子状にスリット1を入れる。集塵袋付電動カッター工具を用い、スリット深さは30mmとする。実際の現場ではモルタル厚が一定でないことが多いので既存コンクリートに若干切り込まれる程度までスリットを入れることとする。スリット幅は切削ブレードの厚みで2mm程度であるが、既存外壁のモルタルを剥がさない部分との境目はスリット幅をほぼ2倍に拡げて第三工程での横方向破断が影響されないで剥離されるようにすることが好ましい。  1st process: The slit 1 is put in the grid | lattice form shown by FIG. An electric cutter tool with a dust bag is used, and the slit depth is 30 mm. In actual sites, the mortar thickness is often not constant, so slits are made to the extent that they are slightly cut into existing concrete. Although the slit width is about 2 mm in terms of the thickness of the cutting blade, the boundary between the existing outer wall and the part where the mortar is not peeled is peeled off without being affected by the lateral fracture in the third step by expanding the slit width almost twice. It is preferable to do so.

第二工程:図2に示される格子状のスリット位置の各四角形の中心部にコアドリルで拡張子挿入孔2を明ける。孔径は25mm、深さはスリット1の深さより若干深めとしプラス3〜5mm程度とする。孔明け工具は打撃作用の無い回転式コアドリルを使用する。更にコアドリル刃先の冷却は水に替えて泡を使用した。泡は騒音の低減、粉塵飛散防止、作業環境クリーン性のアップ等メリットは多大である。  2nd process: The extension insertion hole 2 is opened with a core drill in the center part of each square of the grid | lattice-like slit position shown by FIG. The hole diameter is 25 mm and the depth is slightly deeper than the depth of the slit 1 and is about 3 to 5 mm plus. The drilling tool uses a rotary core drill with no striking action. Furthermore, the core drill blade edge was cooled by using foam instead of water. Bubbles have significant advantages such as noise reduction, dust scattering prevention, and improved work environment cleanliness.

第三工程:拡張子挿入孔2に拡張子3を挿入する。拡張子3の外径は挿入孔2の内径にほぼ等しい。心棒押出工具を作動させ心棒4を押し出し拡張子3を拡開させる。心棒押出工具は電動+油圧組み合わせのハイブリッド工具を用い、拡張子は図3,図4に示される形状とする。拡張子3の拡開によりスリット1で囲まれた既存モルタルに拡開部位に応じた横方向に亀裂が入りコンクリートとモルタルのほぼ界面で断面破断する。
既存モルタル塊を取り除きやすくするために、心棒4を拡張子3から突出させて更にコンクリート壁方向に若干進ませる構成、図1(3−3)に示される、とし、破断された既存モルタル塊を浮き上がらせ、取り除く。
Third step: The extension 3 is inserted into the extension insertion hole 2. The outer diameter of the extension 3 is substantially equal to the inner diameter of the insertion hole 2. The mandrel pushing tool is actuated to push out the mandrel 4 and expand the extension 3. The mandrel extrusion tool uses a hybrid tool of electric / hydraulic combination, and the extension is the shape shown in FIGS. Due to the extension of the extension 3, the existing mortar surrounded by the slit 1 is cracked in the lateral direction according to the extension site, and the cross section is broken at the almost interface between the concrete and the mortar.
In order to make it easy to remove the existing mortar mass, a configuration in which the mandrel 4 protrudes from the extension 3 and further advances in the direction of the concrete wall as shown in FIG. 1 (3-3). Lift and remove.

本実施例では、スリット1を格子状としたが丸形状等現場に応じた形があり、第二工程のコアドリルも泡に限定されるものではなく、第三工程の工具も種類を限定するものではない。更に、拡張子1と心棒3の形状も図5、図6に示されるように心棒3の先端が太径で4つ割りである等の組み合わせも有効である。  In this embodiment, the slit 1 is a lattice shape, but there are shapes such as a round shape according to the site, the core drill in the second step is not limited to foam, and the tool in the third step is also limited in type. is not. Further, the extension 1 and the shape of the mandrel 3 are also effective in combinations such as the tip of the mandrel 3 having a large diameter divided into four as shown in FIGS.

通常コンクリート造の建物は仕上材としてタイル、塗装等が施されているが、本発明の実施形態では、それら仕上材の上からスリットを入れ、孔明けをすることができる。  Normally, a building made of concrete is tiled, painted, or the like as a finishing material, but in the embodiment of the present invention, a slit can be made from above the finishing material to make a hole.

1 スリット
2 拡張子挿入孔
3 拡張子
4 心棒
1 Slit 2 Extension insertion hole 3 Extension 4 Mandrel

Claims (3)

既存モルタル等にスリットを入れる第一工程、スリットで囲まれた内側部分に拡張子挿入孔明けをする第二工程、明けられた孔に拡張子を挿入し拡開させ剥離する第三工程からなる既存モルタル等剥離工法It consists of a first step of slitting an existing mortar, etc., a second step of opening an extension insertion hole in the inner part surrounded by the slit, and a third step of inserting and expanding the extension into the opened hole and peeling it off. Existing mortar stripping method 拡張子挿入孔に心棒押出拡開型拡張子を挿入し拡開させ剥離する第三工程からなる請求項1記載の既存モルタル等剥離工法The existing mortar peeling method according to claim 1, comprising a third step of inserting and expanding a mandrel extrusion expansion extension into the extension insertion hole, and then spreading and exfoliating. 第三工程内で、拡張子から心棒を突出させて既存モルタル等を浮き上がらせる構成からなる請求項2記載の既存モルタル等剥離工法The existing mortar etc. peeling method according to claim 2, wherein the existing mortar etc. is lifted by projecting a mandrel from the extension in the third step.
JP2010048345A 2010-02-16 2010-02-16 Method for stripping mortar or the like Pending JP2011169088A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021031848A (en) * 2019-08-14 2021-03-01 株式会社竹中工務店 Peeling method of tile material
JP2021046699A (en) * 2019-09-18 2021-03-25 日本総合住生活株式会社 Crushing method for waterproof presser layer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021031848A (en) * 2019-08-14 2021-03-01 株式会社竹中工務店 Peeling method of tile material
JP7291571B2 (en) 2019-08-14 2023-06-15 株式会社竹中工務店 Tile stripping method
JP2021046699A (en) * 2019-09-18 2021-03-25 日本総合住生活株式会社 Crushing method for waterproof presser layer
JP7325279B2 (en) 2019-09-18 2023-08-14 日本総合住生活株式会社 Method of crushing the waterproof holding layer

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