JP2005270786A5

JP2005270786A5 -

Info

Publication number: JP2005270786A5
Application number: JP2004087327A
Authority: JP
Filing date: 2004-03-24
Publication date: 2007-03-01
Anticipated expiration: 2024-03-24

Description

工場建物、作業建物等の既存建造物での作業を停止させたり、そこに設置した機器類等を移動させなくてもよいように、例えば図６に示す如く、建造物９１外の地上（地盤Ｌ上）より該建造物下の汚染土壌領域へ向け斜め井戸９２１（又は９２１’、９２２、９２２’等）を形成し、該井戸に汚染地下水等を流入させてこれを吸引排出する、という方法である。 For example, as shown in FIG. 6, the ground (ground surface) outside the building 91 may be used so that it is not necessary to stop work in existing buildings such as factory buildings and work buildings, or move equipment installed there. A slanted well 921 (or 921 ′ , 922 , 922 ′, etc.) is formed toward the contaminated soil region under the building from above (L), and contaminated groundwater or the like is introduced into the well and sucked out. It is.

地中には通常、地上に近い、地下水が飽和していない不飽和層と、その下の地下水が飽和した飽和層と、さらにその下の地下水を通し難い不透水層とがある。汚染物質含有地下水は該飽和層に溜まりやすいので、集水用水平井戸は、例えば、飽和層の底部又は飽和層と不透水層との境界領域に形成する場合を挙げることができる。また、復水用水平井戸は、例えば、不飽和層（例えばその底部）や不飽和層と飽和層の境界領域に形成する場合を挙げることができる。 In the ground, there are usually an unsaturated layer close to the ground where the groundwater is not saturated, a saturated layer where the groundwater is saturated below, and an impermeable layer where it is difficult to pass the groundwater below. Since pollutant-containing groundwater tends to accumulate in the saturated layer, the horizontal well for collecting water can be formed, for example, at the bottom of the saturated layer or at the boundary region between the saturated layer and the impermeable layer. Further, Fukumizuyo horizontal wells, for example, a case of forming the boundary region of the unsaturated layer (bottom of Tatoebaso) and unsaturated layer with saturated layer.

地上には浄化装置５を設置してある。浄化装置５は、本例では、汚染物質含有地下水を加熱するとともに曝気処理する加熱曝気部５１と、ここから上昇してくる気体から揮発性有機化合物を吸着除去して残り基体を大気中へ放出する活性炭吸着部５２とからなっている。なお、浄化装置はこれに限定されるものではなく、汚染物質の種類等において適当な浄化装置を選択採用することができる。 A purification device 5 is installed on the ground. In this example, the purification device 5 heats and aerates the pollutant-containing groundwater, and adsorbs and removes volatile organic compounds from the gas rising from here and releases the remaining substrate into the atmosphere. And an activated carbon adsorbing part 52 to be used. Note that the purification device is not limited to this, and an appropriate purification device can be selected and used for the type of contaminants.

集水導出装置４は、立坑１の底部に設置した水汲み上げ用のポンプＰ１、ポンプＰ１で汲み上げられてくる水を浄化装置５の加熱曝気部５１へ供給するポンプＰ２及びこれらを接続する配管４１からなっている。 Water collecting derivation device 4 is connected to the vertical shaft 1 pump P1 for pumping water placed on the bottom, the pump P2 and these supplies water coming pumped P1 to the heating aeration unit 51 of the purifier 5 pipe It consists of 41.

集水用水平井戸２は例えば次のようにして形成する。すなわち、掘削刃を有する掘削用シュー８１に接続した、排土用螺旋羽根８３を有する管形態の推進軸８２を掘進機Ｍ１で回転駆動しつつ地盤Ｌを掘り進んで行く。また、推進軸８２に外嵌した鞘管８を掘進機Ｍ１で掘削穴内に押し込んでいく。さらに鞘管８に外嵌した井戸管２を鞘管８の押し込みにともなって後方から押し込んでいく。この間、螺旋羽根８３で鞘管８内から排出されてくる土砂等は地上に配置したクレーン車７のクレーンで立坑１内に昇降させるバケット７１にて立坑外へ排出する。このようにして井戸管２を所定位置に到達させる。 The horizontal water collecting well 2 is formed as follows, for example. In other words, the ground shaft L is dug while the propulsion shaft 82 in the form of a tube having the earthing spiral blade 83 connected to the excavating shoe 81 having the excavating blade is rotationally driven by the excavator M1. Further, the sheath tube 8 fitted on the propulsion shaft 82 is pushed into the excavation hole by the excavator M1. Further, the well pipe 2 fitted around the sheath pipe 8 is pushed in from behind as the sheath pipe 8 is pushed. During this time, earth and sand discharged from the sheath pipe 8 by the spiral blade 83 is discharged to the outside of the shaft by a bucket 71 which is lifted and lowered into the shaft 1 by a crane of a crane truck 7 arranged on the ground. In this way, the well pipe 2 is made to reach a predetermined position.