JPS626027A - Chipping for shaped steel face in underground wall construction work - Google Patents

Abstract

PURPOSE:To easily break and remove the inside concrete of shape steel by a method in which the flat-type chisel of a rock drill provided to a power shovel is driven to the surface of the shape steel of the outer wall of an underground wall, and the rock drill is pushed down under its own weight. CONSTITUTION:A flat chisel 42 is attached to a rock drill 41 provided to construction machine, e.g., power shovel. The rock drill 41 is operated to drive the chisel 42 to the surface of a shape steel 21 in the outer wall formed by underground wall construction work. When the construction machine is put into inoperative condition, the weights of the drill 41 and the boom of the construction machine act on the chisel 42, and the surface concrete of H-shape steel 21 is broken by the chisel 42 while being lowered. Chipping operation for the inside concrete of the shape steel of the underground wall can thus be performed with good efficiency.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、地中壁構築工法に関し、特に壁体に埋設され
た型鋼の表面のはつり作業を効率化したはつり方法に関
する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an underground wall construction method, and more particularly to a chisel method that streamlines the chisel work of the surface of a shaped steel buried in a wall.

従来の技術 地下構造物の建設にあたり、とくに湿潤な地盤において
は、一般に止水壁体及び土留壁体としての地中壁が構築
される。地中壁４１！Ｉ築工法は種々であるが、例えば
第４図に示す工法が知られている。BACKGROUND OF THE INVENTION When constructing an underground structure, especially in humid ground, underground walls are generally constructed as water-stop walls and earth-retaining walls. Underground wall 41! Although there are various construction methods, for example, the construction method shown in FIG. 4 is known.

先ず、オーガ（図示せず）を用いて地盤を所定深さまで
削孔し、該削孔内にオーガの中空孔を介してセメント、
砂、砂利等の混合物を注入しつつオーガを引上げ、抗１
１を形成する。上記作業を繰り返して杭１１〜１７を連
設し、所定の杭例えばひとつ置きの杭１１，１３．１５
．１７にＨ型鋼２１〜２４等を埋設して外壁体１となす
（第４図（ａ））。図示の簡略化のため、第４図（ａ　
）には外壁体１の一部のみを示しであるが、該壁体１は
例えば平面視矩形状の空間を画成するように該矩形の周
辺に沿って配設される（以下、図示部分についてのみ説
明する。）。次いで、外壁体１で画成された空間内の土
砂３を掘削し外部へ排除した後、外壁体１の型鋼埋設部
の一側すなわち杭の内側周縁部１１ａ、”１３ａ、１５
ａ、１７ａを、少なくともＨ型鋼２１〜２４の外面が露
出するまではつる（第４図（ｂ））。次に、露出したＨ
型鋼２１〜２４の面に鉄筋３１を溶接等により結合し、
セメントミルク、砂、砂利等の混合物３２を入れ内壁体
２３とする。First, a hole is drilled in the ground to a predetermined depth using an auger (not shown), and cement and cement are poured into the hole through the hollow hole of the auger.
Pull up the auger while injecting a mixture of sand, gravel, etc.
form 1. By repeating the above operations, piles 11 to 17 are installed in a row, and the specified piles, for example, every other pile 11, 13, 15
．． H-shaped steels 21 to 24, etc. are buried in 17 to form the outer wall 1 (FIG. 4(a)). For simplicity of illustration, Figure 4 (a
Although only a part of the outer wall 1 is shown in ), the wall 1 is arranged along the periphery of the rectangle so as to define, for example, a rectangular space in plan view (hereinafter, the illustrated portion will be referred to as ). Next, after excavating the earth and sand 3 in the space defined by the outer wall 1 and removing it to the outside, one side of the section where the shaped steel is buried in the outer wall 1, that is, the inner peripheral edge of the pile 11a, ``13a, 15
a, 17a until at least the outer surfaces of the H-shaped steels 21 to 24 are exposed (FIG. 4(b)). Next, the exposed H
Reinforcing bars 31 are connected to the surfaces of the shaped steels 21 to 24 by welding or the like,
A mixture 32 of cement milk, sand, gravel, etc. is put in to form the inner wall body 23.

上記工法によれば、Ｈ型鋼に鉄筋を溶接するために、Ｈ
型鋼の内側表面をはつる作業を行う必要がある。従来、
このはつり作業をハンドハンマ等を用いて人力で行って
おり、作業能率１作業コスト、作業環境等の種々の面で
問題があり、又、パワーショベル等に装着したパケット
の爪部ではつり作業を行う場合もあるが、外壁体１のコ
ンクリート部にひびを生じさせることがあり、止水性を
損う問題があった。According to the above method, in order to weld reinforcing bars to H-shaped steel, H
It is necessary to chisel the inner surface of the shaped steel. Conventionally,
This chiseling work is done manually using a hand hammer, etc., and there are various problems in terms of work efficiency, work cost, work environment, etc., and the claw part of the packet attached to a power shovel etc. cannot be used for lifting work. Although this may be done in some cases, it may cause cracks in the concrete portion of the outer wall 1, resulting in the problem of impairing water-stopping properties.

発明が解決しようとする問題点 本発明は、地中壁構築工法によって互いに連設される壁
体の型鋼内側表面のはつり作業の効率を向上でき、はつ
り面の仕上りが良く、作業時の騒音が少なく、作業コス
トも低床なはつり方法を提供することを目的とする。Problems to be Solved by the Invention The present invention can improve the efficiency of chiseling work on the inner surface of shaped steel of wall bodies that are connected to each other by the underground wall construction method, and can improve the finish of the chiseled surface and reduce noise during work. The purpose of the present invention is to provide a method for chiseling that requires less work and has a lower work cost.

問題点を解決するための手段 地中壁構築工法において、パワーショベル等の建設機械
に装備されたさく岩機に装着した平形のタガネを、外壁
体の型鋼の表面まで打込み、次いで、前記さく岩機をそ
の自重で垂下運動させて前記外壁体の型鋼の内側表面の
コンクリートを破壊除去する構成より成る 作　　用 パワーショベル等の建設機械に装着されたさく岩機に平
形のタガネを装着し、該タガネを外壁体の型鋼埋設部の
型鋼側表面に打ち込み、打撃力を加えると、該−側周縁
部を成すセメント混合固化物が徐々に破壊されて行き、
外壁体に埋設された型鋼の内側外面が露出するに至る。Means for Solving the Problems In the underground wall construction method, a flat chisel attached to a rock drill installed on a construction machine such as a power shovel is driven up to the surface of the shaped steel of the external wall body, and then the rock drill is A flat chisel is attached to a rock drill attached to a construction machine such as a power shovel, and the concrete on the inner surface of the shaped steel of the outer wall body is destroyed and removed by making the machine hang down under its own weight. When a chisel is driven into the mold steel side surface of the mold steel buried part of the outer wall body and a striking force is applied, the cement mixture solidified material forming the negative side peripheral edge is gradually destroyed.
The inner and outer surfaces of the shaped steel embedded in the outer wall are exposed.

次に、打撃操作を停止すると共にパワーショベル等の建
設機械を非作動化してさく岩機等の機械の自重で垂下す
るにまかせると、自重によるさく岩機等の機械のの垂下
運動に伴う押圧力が、型鋼埋設部の一側周縁部を成すコ
ンクリートに加わり、これを破壊する。この作業を繰「
すと、型鋼の各々の一側面全体が露出し、はつり作業が
完了する。Next, if you stop the impact operation and deactivate the construction machine such as a power shovel and allow it to sag due to its own weight, it will be possible to avoid the pressure caused by the drooping movement of the machine such as a rock drill due to its own weight. Pressure is applied to the concrete forming the peripheral edge of one side of the buried part of the shaped steel, destroying it. Repeat this process.
Then, one entire side of each of the steel shapes is exposed and the chisel operation is completed.

実施例 第１゛図及び第２図は本発明の一実施例に係るはつり方
法を示し、図中１は外壁体で、第４図に基づく上述の説
明のようにして構築される。４０は建設機械例えばパワ
ーショベルで、土砂を掘削排除した外壁体１の内側空間
４内に配備され、第３図に示す平形のタガネ４２を装着
したさく岩ＦＭ４１を搭載している。Embodiment FIGS. 1 and 2 show a chisel method according to an embodiment of the present invention, in which reference numeral 1 denotes an outer wall body, which is constructed as described above based on FIG. 4. 40 is a construction machine such as a power shovel, which is installed in the inner space 4 of the outer wall 1 from which earth and sand has been excavated and removed, and is equipped with a rock drilling FM 41 equipped with a flat chisel 42 shown in FIG.

外壁体１のはつり作業にあたり、先ず、パワーショベル
４０を駆動してタガネ４２を外壁体１の型鋼埋設部例え
ば型鋼としてのＨ型鋼２１が埋設されている部分に向け
、当該部分の一側周縁部１１８の最上部にタガネ４２を
打込む。次いで、さく岩機４１を駆動してタガネ４２に
より該−側周縁部１１ａに略垂直に打撃力を加え、当該
部分のコンクリートを徐々に水平方向に破壊して行く。To chisel the outer wall 1, first drive the power shovel 40 and point the chisel 42 at the part of the outer wall 1 where the shaped steel is buried, for example, the part where the H-shaped steel 21 as the shaped steel is buried, and cut the edge of one side of the part. Drive the chisel 42 into the top of 118. Next, the rock drill 41 is driven to apply a striking force substantially perpendicularly to the minus side peripheral edge portion 11a using the chisel 42, thereby gradually destroying the concrete in that portion in the horizontal direction.

この打撃操作はＨ型鋼２１の一側外面２１ａが露出する
まで継続される。外面２１ａが露出しだならば、さく岩
機４１の駆動を停止し打撃操作を終了し、パワーショベ
ル４ｏを非作動化してさく岩機４１の高さ位置を維持す
る支持力を消滅させ、さく岩機４１さらにはパワーショ
ベルのアームやパワーショベル自体の自重全印加して垂
下するにまかせるようにする。この結果、さく岩機４１
及びショベル４０のブーム等の相当な重量がタガネ４２
を介してＨ／８！鋼２１の表面の周縁部１１ａのコンク
リート部に加わり、タガネ４２の先端がＨ型ｗＩ２１の
外面２１ａに当接した状態でさく岩機４１が垂下して行
きコンクリート部を破壊しはつっていく（第２図参照）
。この垂下運動は周縁部１１ａの最上部から最下部に亘
るコンクリート部を破壊させる。その結果、杭１１の周
縁部１１ａは、略タガネ４２の幅寸法でＨ型鋼２１の外
面が露出するように破壊される。This striking operation is continued until one side outer surface 21a of the H-shaped steel 21 is exposed. When the outer surface 21a is exposed, the drive of the rock drill 41 is stopped, the striking operation is finished, the power shovel 4o is deactivated, the supporting force that maintains the height position of the rock drill 41 is eliminated, and the rock drill 41 is stopped. The entire weight of the rock machine 41, the arm of the power shovel, and the power shovel itself is applied to the rock machine 41 so as to allow it to sag. As a result, rock drill 41
The considerable weight of the boom of the excavator 40, etc.
via H/8! The rock drill 41 joins the concrete part of the peripheral edge 11a of the surface of the steel 21, and with the tip of the chisel 42 in contact with the outer surface 21a of the H-shaped wI 21, the rock drill 41 hangs down and breaks the concrete part ( (See Figure 2)
. This drooping movement destroys the concrete portion from the top to the bottom of the peripheral edge 11a. As a result, the peripheral edge 11a of the pile 11 is destroyed so that the outer surface of the H-shaped steel 21 is exposed at approximately the width dimension of the chisel 42.

そして、Ｈ型！１１２１の外面２１ａ全体が十分に露出
するまでタガネ４２の打込み位置を外壁体１に沿って移
動しつつ上記作業を繰返し、Ｈ型ｕ４２１の埋設部につ
いてのはつり作業を終える。更に、Ｈ型鋼２２〜２４及
′び図示を省略したＨ型鋼を埋設した部分につき同様に
作業し、外壁体１全体のはつり作業を完了する。And H type! The above operation is repeated while moving the driving position of the chisel 42 along the outer wall 1 until the entire outer surface 21a of the H-shaped U421 is fully exposed, and the chisel operation for the buried portion of the H-shaped u421 is completed. Furthermore, the same work is carried out on the H-shaped steels 22 to 24' and the buried portions of the H-shaped steels (not shown), thereby completing the chiseling work of the entire outer wall 1.

はつり作業完了後は、第４図を参照して説明したように
、Ｈ型鋼２１〜２４等の露出面に鉄筋３１等を溶接して
内壁体２を外壁体１に連設し、地中壁の構築を終える。After the chiseling work is completed, as explained with reference to Fig. 4, the reinforcing bars 31, etc. are welded to the exposed surfaces of the H-shaped steels 21 to 24, etc., and the inner wall 2 is connected to the outer wall 1, and the underground wall is Finish building the.

なお、タガネの構造を第３図に示すように、タガネの先
端４３の向きがタガネの軸線に対し偏向させたタガネ４
２′を用いて、タガネ４２′の先端４３の向きが下方向
になるようさく岩機に取り付ければ、タガネ４２′の先
端４３がＨ型鋼とコンクリート間に挿入しやすくなりよ
りはつり作業が楽に行なえるようになる。As shown in FIG. 3, the structure of the chisel is a chisel 4 in which the direction of the tip 43 of the chisel is deflected with respect to the axis of the chisel.
If the tip 43 of the chisel 42' is attached to the rock drill with the tip 43 facing downward, the tip 43 of the chisel 42' can be easily inserted between the H-shaped steel and the concrete, making chisel work easier. Become so.

発明の効果 地中壁構築工法において、パワーショベル等の建設機械
に装備されたさく岩機に装着した平形のタガネにて壁体
の型鋼埋設部の内側周縁部を打撃して型鋼外面を露出さ
せた後、さく岩機等の機械の自重で垂下運動させて前記
内側周縁部を破壊除去することにより壁体のはつり作業
を行うようにしたので、はつり作業の効率を向上でき、
はつり面の仕上りが良く、騒音を抑制でき、作業コスト
も低部にできる。Effects of the Invention In an underground wall construction method, a flat chisel attached to a rock drill installed on a construction machine such as a power shovel is used to strike the inner peripheral edge of the buried section of the shaped steel in the wall to expose the outer surface of the shaped steel. After that, the wall is chiseled by using a machine such as a rock drill to make a drooping motion under its own weight to destroy and remove the inner peripheral edge, thereby improving the efficiency of the chisel work.
The cutting surface has a good finish, suppresses noise, and reduces work costs.

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

第１図は、本発明の一実施例によるはつり作業を示す一
部断面部分概略側面図、第２図は同実施例を示す一部断
面部分斜視図、第３図は本発明に使用するタガネの他の
実施例の要部拡大図、及び第４図（ａ　）〜（Ｃ）は本
発明が適用される地中壁構築工法を例示する部分平面断
面図である。 １・・・外壁体、２・・・内壁体、１１〜１７・・・杭
、１１ａ、１３ａ、１５ａ、１７ａ・・・周縁部、２１
〜２４・・・Ｈ型鋼、４０・・・パワーショベル、４１
・・・さく若殿、４２．４２’　・・・平形のタガネ。 特許出願人　　株式会社　多　川　工　業第１図　　　
上 第３図 第４図FIG. 1 is a partially cross-sectional partial schematic side view showing a chisel operation according to an embodiment of the present invention, FIG. 2 is a partially cross-sectional partial perspective view showing the same embodiment, and FIG. 3 is a chisel used in the present invention. An enlarged view of the main part of another embodiment, and FIGS. 4(a) to 4(C) are partial plan sectional views illustrating an underground wall construction method to which the present invention is applied. DESCRIPTION OF SYMBOLS 1... External wall body, 2... Inner wall body, 11-17... Pile, 11a, 13a, 15a, 17a... Peripheral part, 21
~24...H-shaped steel, 40...Power shovel, 41
...Sakuwakadono, 42.42' ...Flat-shaped chisel. Patent applicant Tagawa Kogyo Co., Ltd. Figure 1
Above Figure 3 Figure 4

Claims (2)

【特許請求の範囲】[Claims] （１）地中壁構築工法において、パワーショベル等の建
設機械に装備されたさく岩機に装着した平形のタガネを
、前記地中壁構築工法で作成された外壁体の型鋼の表面
まで打込み、次いで前記さく岩機等の機械の自重で垂下
運動させて前記外壁体の型鋼の内側表面コンクリートを
破壊除去するようにした地中壁構築工法における型鋼面
はつり方法。(1) In the underground wall construction method, a flat chisel attached to a rock drill installed on a construction machine such as a power shovel is driven up to the surface of the shaped steel of the external wall body created by the underground wall construction method, A method for removing a form steel surface in an underground wall construction method, wherein the inner surface concrete of the form steel of the external wall body is destroyed and removed by making the machine, such as the rock drill, move downward under its own weight. （２）前記平形のタガネの先端の向きは該タガネの軸線
方向に対し偏向している特許請求の範囲第１項記載の地
中壁構築工法における型鋼面はつり方法。(2) The method for chisel-shaped steel surface in the underground wall construction method according to claim 1, wherein the tip of the flat chisel is deviated from the axial direction of the chisel.