JP2009235809A - Construction method for dismantlement and removal of underground structure having foundation pile - Google Patents

Construction method for dismantlement and removal of underground structure having foundation pile Download PDF

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JP2009235809A
JP2009235809A JP2008084436A JP2008084436A JP2009235809A JP 2009235809 A JP2009235809 A JP 2009235809A JP 2008084436 A JP2008084436 A JP 2008084436A JP 2008084436 A JP2008084436 A JP 2008084436A JP 2009235809 A JP2009235809 A JP 2009235809A
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underground
ground
removal
adjacent
walls
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Shigeru Tokorosaki
茂 所崎
Yoshio Matsumoto
吉夫 松本
Junichi Yamazaki
淳一 山崎
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Sanshin Corp
三信建設工業株式会社
Kanto Kiso Kogyo Kk
関東基礎工業株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method for the dismantlement and removal of underground structures having foundation piles and can safely and reliably dismantle and safely remove an underground structure having foundation piles constructed adjacently to adjacent land without having to use earth retainers such as sheet piles. <P>SOLUTION: The construction method for the dismantlement and removal of underground structures having foundation piles includes a first process for arranging in a planar form and boring a plurality of boreholes passed through a wall, which constitutes a shell part of an underground structure facing the boundary of adjacent land, downward below the ground of the adjacent land, installing a removal ground anchor or ground reinforced earth etc. to each borehole to apply earth retaining supports, and fixing the wall to the ground of the adjacent land; a second process for forming a hollow space by dismantling and removing inside underground structures such as inside slabs, inside columns, partition walls, pressure-resistant plates, etc. except the wall constituting the shell part or walls and columns; a third process for removing foundation piles of the underground structure and backfilling their remains of removal; and a fourth process for sequentially backfilling hollow spaces corresponding to removed parts with earth and sand each time the wall or the walls and the columns are sequentially cut and removed from their lower parts. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

隣地に隣接して建造されている基礎杭を有する地下構造物を、解体して完全に撤去する基礎杭を有する地下構造物の解体撤去工法に関する。   The present invention relates to a method for dismantling and removing an underground structure having a foundation pile that dismantles and completely removes an underground structure having a foundation pile that is built adjacent to the adjacent land.
地下構造物の解体撤去に関する工法として、特開平7−18881号公報には地下躯体の各階スラブの一部に開口部を形成し、次いで、開口部を介してブレーカーを最下層部分の耐圧板上に搬入し、次いで耐圧板と地下二階のスラブとを順次ブレーカーで解体作業を行いつつ解体箇所の埋め戻しを行い、その後、ブレーカーを開口部を介して埋め戻した土の上に搬送する工程と、ブレーカーでスラブに対して解体作業を行いつつ解体箇所を埋め戻しする工程とを、上階に向かって順次繰り返して行う、地下躯体の解体方法が開示されている。
従来の解体工法では、一階のスラブから下階のスラブへ順次解体していくので、解体作業中、周囲の地盤から外周壁に加わる土圧を相殺するため外周壁を支持する支保工を構築しなければならず、耐圧盤まで解体して埋め戻す際には前記支保工を順次取り外していく必要があったのを、上記発明の地下躯体の解体方法では、耐圧盤から順次上階に向けてスラブを解体しながら埋め戻しを行っていくので、上階のスラブが外周壁に加わる周辺地盤からの土圧を支えるので支保工の設置と取り外しの作業がなくなり、工期の短縮及び経済性の向上が図れ、また一階のスラブが屋根となるので荒天時解体作業現場に影響を及ぼさないメリットがあり、さらには上階のスラブによって解体時の騒音が外部に漏れ出るのを軽減させ、塵埃が外部へ出ることはないとしている。
しかしその反面、閉ざされた空間での解体作業となるため作業員に対する粉塵の影響が心配され、その処理や解体物の外部への搬出が容易でないという問題がある。
また、該公報では外周壁を撤去する方法に触れておらず、同公報の図5には埋め戻された土中に外周壁が残されている図が示されており、地下構造物の完全な撤去については疑問が残る。さらに基礎杭の撤去に関する記述はない。
特開平7−18881号公報
As a method for dismantling and removing the underground structure, Japanese Patent Application Laid-Open No. 7-18881 discloses that an opening is formed in a part of each floor slab of the underground frame, and then the breaker is placed on the pressure plate of the lowermost layer through the opening. And then backfilling the dismantling part while sequentially disassembling the pressure plate and the second floor slab with a breaker, and then transporting the breaker over the backfilled soil through the opening; In addition, there is disclosed a method for dismantling an underground building, in which a step of backfilling a dismantling part while performing dismantling work on a slab with a breaker is sequentially repeated toward the upper floor.
In the conventional demolition method, the slabs on the first floor are disassembled sequentially from the slab on the lower floor, so a support work that supports the outer peripheral wall is constructed during the demolition work to offset the earth pressure applied from the surrounding ground to the outer peripheral wall. However, when dismantling up to the pressure platen and backfilling, it was necessary to remove the support works sequentially. As the slab is backfilled while dismantling, the slab on the upper floor supports earth pressure from the surrounding ground applied to the outer peripheral wall, eliminating the work of installing and removing the support work, shortening the work period and reducing economic efficiency The slab on the first floor can be used as a roof, which has the advantage of not affecting the site of dismantling work in stormy weather.Furthermore, the slab on the upper floor reduces the leakage of noise during dismantling to the outside. Go out It is not.
However, on the other hand, since the dismantling work is performed in a closed space, there is a concern about the influence of dust on workers, and there is a problem that it is not easy to carry out the processing or dismantling the dismantled object.
Further, the publication does not mention a method of removing the outer peripheral wall, and FIG. 5 of the same publication shows a diagram in which the outer peripheral wall is left in the backfilled soil. The question remains about the removal. Furthermore, there is no description regarding the removal of foundation piles.
Japanese Patent Laid-Open No. 7-18881
また、基礎杭の撤去に関しては多くの発明、考案がなされているが、隣地地盤の崩落を防止しつつ基礎杭を有する地下構造物を解体し、基礎杭を含むすべてを撤去する工法についての発明、考案は見られない。   In addition, many inventions and devices have been devised regarding the removal of foundation piles, but inventions related to the construction method of dismantling underground structures with foundation piles and removing everything including foundation piles while preventing collapse of the adjacent ground. The idea is not seen.
本発明は、上記背景技術に鑑み、隣地に隣接して建造されている基礎杭を有する地下構造物を、隣地の崩壊を伴うことなく安全確実に解体し、基礎杭をも含めて完全に撤去できる地下構造物の解体撤去工法を提供することを課題としたものである。   In view of the above-mentioned background art, the present invention safely and securely dismantles an underground structure having a foundation pile that is built adjacent to the adjacent land without causing collapse of the adjacent land, and completely removes the foundation pile including the foundation pile. It is an object to provide a method for dismantling and removing underground structures.
本発明者等は上記課題を下記の手段によって解決した。
(1)隣地と隣接して建造されている基礎杭を有する地下構造物の解体撤去工法であって、
前記地下構造物の撤去によって隣地が崩落するのを防止するため、解体撤去に先駆けて、地下構造物の隣地境界に面した地下構造物の壁を貫通し隣地地盤の斜め下方に向かうボーリング孔を面状に複数個並べて穿設し、前記各ボーリング孔にグランドアンカー又は地山補強土等を設置して山留め支保工を施し、前記隣地境界に面した壁を隣地地盤に固着する第1工程と、
前記隣地境界に面した外殻部を構成する壁、又は壁及び柱を残して、内側のスラブや柱、仕切壁、耐圧板等の内側地下構造物を解体撤去して中空スペースとする第2工程と、
前記地下構造物の基礎固めのために打ち込まれていた基礎杭を撤去し、基礎杭撤去後の杭跡を埋め戻す第3工程と、
前記隣地境界に面した外殻部を構成する壁、又は壁及び柱を下部から順次切断して撤去し、前記壁、又は壁及び柱が下部から撤去されるごとに、撤去された部分に対応する中空スペースに土砂を埋め戻す作業を繰り返し行う第4工程と、
でなることを特徴とする基礎杭を有する地下構造物の解体撤去工法。
(2)前記地下構造物の隣地境界に面した外殻部を構成する壁を隣地地盤に固着するグランドアンカー又は地山補強土等を設置して山留め支保工を施す複数個のボーリング孔が、前記外殻部を構成する壁、又は壁と柱を下方から切断して撤去する際、壁又は壁及び柱の切断部分の撤去によって隣地地盤が崩落しないよう、隣地地盤の状態に対応した上下間隔、及び深さで穿設されてなることを特徴とする前項(1)に記載の基礎杭を有する地下構造物の解体撤去工法。
The present inventors have solved the above problems by the following means.
(1) A demolition removal method for an underground structure having a foundation pile built adjacent to the adjacent land,
In order to prevent the adjacent land from collapsing due to the removal of the underground structure, prior to the dismantling and removal, a borehole that penetrates the wall of the underground structure facing the boundary of the adjacent structure of the underground structure and goes diagonally below the adjacent ground. A plurality of holes arranged side by side in a plane, a ground anchor or a ground-reinforced soil is installed in each of the boreholes, and a mountain retaining support is applied, and a wall facing the boundary of the adjacent land is fixed to the adjacent ground; ,
A second part is a hollow space formed by dismantling and removing inner underground structures such as inner slabs, pillars, partition walls, pressure plates, etc., leaving walls or walls and pillars constituting the outer shell part facing the border of the adjacent land. Process,
A third step of removing the foundation piles that have been driven to solidify the foundation of the underground structure, and backfilling the pile marks after the foundation pile removal;
Each time the wall or wall and pillar constituting the outer shell part facing the border of the adjacent land is cut and removed sequentially from the lower part, each time the wall or wall and pillar is removed from the lower part, it corresponds to the removed part A fourth step of repeatedly refilling earth and sand in the hollow space
Deconstruction and removal method for underground structures with foundation piles.
(2) A plurality of boring holes for installing a ground anchor or a natural ground reinforcing soil for fixing a wall constituting an outer shell portion facing the boundary of the adjacent ground of the underground structure to the adjacent ground and performing a mountain retaining support, The vertical gap corresponding to the state of the adjacent ground so that the adjacent ground will not collapse due to the removal of the wall or the cut part of the wall and pillar when the wall or the wall and the pillar constituting the outer shell part are cut and removed from below. The method for dismantling and removing an underground structure having a foundation pile according to the preceding item (1), characterized by being drilled at a depth.
本発明によれば、下記の効果が期待できる。
〈1〉隣地と隣接して建造されている地下構造物の解体撤去の第1工程において、地下構造物の隣地境界に面した外殻部を構成する壁を貫通して隣地の地盤下方に向かうボーリング孔を面状に複数個並べて穿設し、各ボーリング孔にグランドアンカー又は地山補強土等を設置して山留め支保工を施し、前記壁を隣地の地盤に固着するので、前記隣地境界に面した外殻部を構成する壁、又は壁及び柱を残して、内側のスラブや柱、仕切壁、耐圧板、内側基礎等の内側地下構造物を解体撤去する第2工程と、第2工程によって内側地下構造物が撤去されて中空となったスペースでの基礎杭の撤去と撤去後の杭跡を埋め戻す第3工程とが、隣地地盤崩落の危惧なく安全、確実に実施できる。
〈2〉基礎杭撤去後、第4工程において前記隣地境界に面した外殻部を構成する壁、又は壁及び柱を下部から順次切断して撤去し、前記壁、又は壁及び柱を下部から撤去するごとに、撤去された部分に対応する中空スペースに土砂を埋め戻す作業を繰り返し行うので、前記壁、又は壁及び柱の撤去途中において隣地地盤が崩落するのを防止しつつ、かつ外殻部を構成する壁、又は壁及び柱のすべてが撤去された時点で、基礎杭跡を含む地下構造物の撤去跡が完全に埋め戻された状態となるので、安全で効率的な解体撤去工法が提供できる。
〈3〉前記地下構造物の隣地境界に面した外殻部を構成する壁を隣地地盤に固着するグランドアンカー又は地山補強土等を設置して山留め支保工を施す複数個のボーリング孔が、前記外殻部を構成する壁、又は壁と柱を下方から切断して撤去する際、壁又は壁及び柱の切断部分の撤去によって隣地地盤が崩落しないよう、隣地地盤の状態に対応した上下間隔、及び深さで穿設されているので、外殻部を構成する壁、又は壁及び柱の撤去が、隣地の崩落を招くことなく安全にできる。
According to the present invention, the following effects can be expected.
<1> In the first step of dismantling and removing the underground structure built adjacent to the adjacent land, it passes through the wall that forms the outer shell facing the adjacent boundary of the underground structure and heads downward in the ground of the adjacent land A plurality of boring holes are drilled side by side, and ground anchors or ground reinforcement soil is installed in each boring hole, and the support is fixed to the ground, and the wall is fixed to the ground of the adjacent land. Second and second steps of dismantling and removing inner underground structures such as inner slabs and columns, partition walls, pressure plates, inner foundations, etc., leaving the walls or walls and columns that make up the facing outer shell part Therefore, the removal of the foundation pile in the space where the inner underground structure has been removed and the third step of refilling the pile mark after removal can be safely and reliably carried out without fear of the collapse of the adjacent ground.
<2> After the foundation pile is removed, in the fourth step, the walls or walls and pillars constituting the outer shell facing the adjacent land boundary are sequentially cut from the lower part and removed, and the walls or walls and pillars are removed from the lower part. Each time it is removed, the work of refilling the earth and sand in the hollow space corresponding to the removed part is repeated, so that the adjacent ground can be prevented from collapsing during the removal of the wall or wall and column, and the outer shell. When all of the walls or walls and pillars that make up the part are removed, the removal of the underground structure including the foundation pile remains completely backfilled, so a safe and efficient demolition removal method Can be provided.
<3> A plurality of boring holes for installing a ground anchor or a ground reinforcement soil to fix the wall constituting the outer shell portion facing the boundary of the adjacent ground of the underground structure to the ground, and applying a mountain retaining support, The vertical gap corresponding to the state of the adjacent ground so that the adjacent ground will not collapse due to the removal of the wall or the cut part of the wall and pillar when the wall or the wall and the pillar constituting the outer shell part are cut and removed from below. Since it is drilled at a depth, it is possible to safely remove the walls or walls and pillars constituting the outer shell without causing collapse of the adjacent land.
本発明を実施するための最良の形態について、図1−1、図1−2に示す基礎杭を有する地下構造物の解体撤去工法の工程説明図に基づいて説明する。
図において1は地下構造物、2は柱、3は壁、3a、3bは切断撤去された壁の位置、4は梁、5は地中梁、6、6’はスラブ、7は耐圧板、8は基礎杭、10はグランドアンカー又は山留め支保工、Gは地盤、GLは地表面を示す。
BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described based on the process explanatory diagram of the dismantling and removing method for the underground structure having the foundation pile shown in FIGS. 1-1 and 1-2.
In the figure, 1 is an underground structure, 2 is a pillar, 3 is a wall, 3a and 3b are cut and removed wall positions, 4 is a beam, 5 is an underground beam, 6 and 6 'are slabs, 7 is a pressure plate, 8 is a foundation pile, 10 is a ground anchor or a mountain retaining support, G is the ground, and GL is the ground surface.
本発明の基礎杭を有する地下構造物の解体撤去工法は、図1−1(a)の地下構造物の断面図に示すように、解体しようとする地下構造物1が隣地境界線に極めて近い位置に建造されていて、前記地下構造物1の解体撤去に際して隣地の地盤Gが崩落するのを防止するための矢板やシートパイルなどの山留めを施す余地がない場合でも、隣地地盤Gに影響を及ぼすことなく安全確実にに地下構造物1のすべてを完全に解体撤去できることを特徴とするものであって、
前記地下構造物1の解体撤去に先駆けて、地下構造物1の隣地境界に面した壁3を貫通し隣地地盤Gの斜め下方に向かうボーリング孔を面状に複数個並べて穿設し、前記各ボーリング孔にグランドアンカー又は地山補強土10を設置して山留め支保工を施し、前記隣地境界に面した壁3を隣地地盤Gに固着する第1工程と、
前記隣地境界に面した外殻部を構成する壁3、又は壁3及び柱2を残して、内側のスラブ6、6’や柱、仕切壁、耐圧板7等の内側地下構造物を解体撤去して中空スペースとする第2工程と、
前記地下構造物1の基礎固めのために打ち込まれていた基礎杭8を撤去し、基礎杭8撤去後の杭跡を埋め戻す第3工程と、
前記隣地境界に面した外殻部を構成する壁3、又は壁3及び柱2を下部から順次切断して撤去し、前記壁3、又は壁3及び柱2が下部から撤去されるごとに、撤去された部分に対応する中空スペースに土砂を埋め戻す作業を繰り返し行う第4工程とで構成されている。
As shown in the cross-sectional view of the underground structure in FIG. 1-1 (a), the underground structure 1 to be demolished is extremely close to the adjacent boundary line. Even if there is no room to mount a pile such as a sheet pile or a sheet pile to prevent the ground G of the adjacent ground from collapsing when the underground structure 1 is dismantled and removed, the adjacent ground G is affected. It is characterized by being able to completely dismantle and remove all of the underground structure 1 safely and reliably without affecting,
Prior to dismantling and removal of the underground structure 1, a plurality of boring holes that penetrate the wall 3 facing the boundary of the adjacent ground of the underground structure 1 and go diagonally below the adjacent ground G are formed side by side, A first step of installing a ground anchor or a ground reinforcement soil 10 in the borehole and applying a retaining support to fix the wall 3 facing the boundary of the adjacent ground to the adjacent ground G;
Inner underground structures such as inner slabs 6, 6 ', pillars, partition walls, pressure plate 7, etc. are dismantled, leaving the wall 3 or the wall 3 and the pillar 2 constituting the outer shell facing the adjacent land boundary. And a second step for forming a hollow space,
A third step of removing the foundation pile 8 that has been driven for foundation consolidation of the underground structure 1 and refilling the pile marks after the foundation pile 8 removal;
Each time the wall 3 or the wall 3 and the pillar 2 constituting the outer shell part facing the adjacent land boundary are sequentially cut from the lower part and removed, the wall 3 or the wall 3 and the pillar 2 are removed from the lower part, It is comprised with the 4th process which repeats the operation | work which backfills earth and sand in the hollow space corresponding to the removed part.
図1−1(a)は、地下構造物1の解体撤去に先駆けて、隣地境界に面した外殻部を構成する壁3を貫通して隣地の地盤Gの下方に向かうボーリング孔を面状に複数個並べて穿設し、各ボーリング孔にグランドアンカー又は地山補強土10を設置して山留め支保工を施し、前記壁3を隣地の地盤Gに固着する第1工程の途中の状態を示した断面図である。   FIG. 1-1 (a) is a plan view of a boring hole penetrating through the wall 3 constituting the outer shell facing the boundary of the adjacent land and going downward to the ground G of the adjacent land prior to dismantling and removal of the underground structure 1. A state in the middle of the first step is shown in which a plurality of holes are arranged side by side, ground anchors or ground reinforcement soil 10 is installed in each boring hole, and a retaining support is applied, and the wall 3 is fixed to the ground G of the adjacent ground. FIG.
そして、図1−1(b)は、隣地境界に面した外殻部を構成する壁3、又は壁3及び柱2と耐圧盤7とを残して、内側のスラブ6、6’や柱、仕切壁、耐圧板7等の内側構造体が解体撤去されて中空スペースとなった第2工程終了時の地下構造物1の状態を示す断面図である。図1−1(b)に見られるように、地下に配設されたスラブ6’が撤去された後、その下部にあった壁3にもボーリング孔を穿ち、該ボーリング孔にグランドアンカー又は地山補強土10を設置して山留め支保工を施し、前記壁3を隣地地盤Gに固着し、耐圧板7を撤去して基礎杭8を撤去する際に隣地地盤Gの地圧によって、前記壁3が内側に押されて崩壊し、隣地地盤Gの下部が崩落するのを防止している。   And FIG. 1-1 (b) leaves the wall 3 which comprises the outer shell part which faced the adjacent land boundary, or the wall 3 and the pillar 2, and the pressure | voltage resistant board 7, inner slab 6, 6 'and a pillar, It is sectional drawing which shows the state of the underground structure 1 at the time of completion | finish of the 2nd process which inner structures, such as a partition wall and the pressure | voltage resistant board 7, were dismantled and removed and became a hollow space. As can be seen in FIG. 1-1 (b), after the slab 6 'disposed in the basement is removed, a hole 3 is also drilled in the wall 3 located under the slab 6', and a ground anchor or a ground is formed in the bore hole. The mountain reinforcement soil 10 is installed and a mountain retaining support is applied, the wall 3 is fixed to the adjacent ground G, the pressure plate 7 is removed and the foundation pile 8 is removed, the ground pressure of the adjacent ground G causes the wall 3 is pushed inward and collapses, and the lower part of the adjacent ground G is prevented from collapsing.
図1−2(c)は、第2工程によって内側のスラブ6、6’や柱、仕切壁、耐圧板7等の内側地下構造物が撤去されて中空になったスペースで前記地下構造物1の基礎固めのために打ち込まれていた基礎杭8を撤去し、基礎杭8撤去後の杭跡を埋め戻す第3工程施工途中の状態を示した断面図である。
地下構造物の外殻部を構成する壁3が、隣地地盤Gにグランドアンカー又は地山補強土10の山留め支保工によって固着されているので、隣地地盤Gの崩落の恐れがなく、内側地下構造物が撤去された中空スペースでの基礎杭8の撤去作業が安全に安心して実施できる。
FIG. 1-2 (c) shows the above-described underground structure 1 in a space where the inner slabs 6 and 6 ′, the pillars, the partition walls, the pressure plate 7 and the like are removed and hollowed by the second step. It is sectional drawing which showed the state in the middle of 3rd process construction which removes the foundation pile 8 which was driven in for the foundation hardening of this, and refills the pile trace after foundation pile 8 removal.
Since the wall 3 constituting the outer shell of the underground structure is fixed to the adjacent ground G by a ground anchor or a retaining support for the ground reinforcing soil 10, there is no risk of the adjacent ground G collapsing, and the inner underground structure The removal work of the foundation pile 8 in the hollow space from which the object has been removed can be carried out safely and securely.
図1−2(d)は、撤去し残された外殻部を構成する壁3、又は壁3及び柱2を下部から順次切断して撤去し、前記切断された壁3、又は壁3及び柱2が下部から撤去されるごとに、撤去部分に対応した内空スペースに土砂を埋め戻す作業を繰り返し行う第4工程を説明する断面図である。
同図に見られるように前記外殻部を構成する壁3を、隣地の地盤Gに固着した最下段のグランドアンカー又は地山補強土10を設置して山留め支保工を施した部分の下で切断して撤去し、切断撤去された壁の位置3aに対応した中空スペース(図に埋め戻し1段目として表示)を土砂で埋め戻し、次いで最下段のグランドアンカー又は地山補強土10を撤去した後、前記壁3、又は壁3及び柱2をその上に埋設されたグランドアンカー又は地山補強土10の下で切断撤去し、切断撤去された壁の位置3bに対応する中空スペース(図に埋め戻し2段目として表示)を土砂で埋め戻す作業を、外殻部を構成する壁3、又は壁3及び柱2が完全に撤去されるまで繰り返すので、隣地地盤Gの崩落が防止でき、かつ基礎杭跡を含む地下構造物1がすべて撤去された時点で地下構造物1の撤去跡も完全に埋め戻された状態となる。
したがって、本発明によって基礎杭を有する地下構造物1の完全な解体撤去が、安全かつ効率的に実施できる工法が提供できる。
Fig. 1-2 (d) shows that the wall 3 or the wall 3 and the pillar 2 constituting the outer shell part removed and removed are sequentially cut from the lower part and removed, and the cut wall 3 or the wall 3 and It is sectional drawing explaining the 4th process which repeats the operation | work which backfills earth and sand in the inner space corresponding to a removal part, whenever the pillar 2 is removed from the lower part.
As shown in the figure, the wall 3 constituting the outer shell portion is placed under the portion where the bottom ground anchor anchored to the ground G of the adjacent land or the ground reinforcement soil 10 is installed and the mountain retaining support is applied. After cutting and removing, the hollow space corresponding to the position 3a of the cut and removed wall (shown as the first backfill in the figure) is backfilled with earth and sand, and then the bottom ground anchor or ground reinforcement soil 10 is removed. After that, the wall 3 or the wall 3 and the pillar 2 are cut and removed under a ground anchor or ground reinforcement soil 10 embedded thereon, and a hollow space corresponding to the position 3b of the cut and removed wall (see FIG. Since the wall 3 or the wall 3 and the pillar 2 constituting the outer shell are completely removed, the collapse of the adjacent ground G can be prevented. And underground structure 1 including foundation pile remains A state of removal traces were also completely backfilled underground structure 1 when it is removed Te.
Therefore, the construction method which can implement the complete demolition removal of the underground structure 1 which has a foundation pile safely and efficiently by this invention can be provided.
本発明の基礎杭を有する地下構造物の解体撤去工法の工程説明図Process explanatory drawing of dismantling removal method of underground structure having foundation pile of the present invention 本発明の基礎杭を有する地下構造物の解体撤去工法の工程説明図Process explanatory drawing of dismantling removal method of underground structure having foundation pile of the present invention
符号の説明Explanation of symbols
1:地下構造物
2:柱
3:壁
3a、3b:切断撤去された壁の位置
4:梁
5:地中梁
6、6:スラブ
7:耐圧板
8:基礎杭
10:グランドアンカー又は地山補強土
G:地盤
GL:地表面
1: Underground structure 2: Column 3: Wall 3a, 3b: Position of the wall that has been cut and removed 4: Beam 5: Underground beam 6, 6: Slab 7: Pressure plate 8: Foundation pile 10: Ground anchor or natural ground Reinforced soil G: Ground GL: Ground surface

Claims (2)

  1. 隣地と隣接して建造されている基礎杭を有する地下構造物の解体撤去工法であって、
    前記地下構造物の撤去によって隣地が崩落するのを防止するため、解体撤去に先駆けて、地下構造物の隣地境界に面した地下構造物の壁を貫通し隣地地盤の斜め下方に向かうボーリング孔を面状に複数個並べて穿設し、前記各ボーリング孔にグランドアンカー又は地山補強土等を設置して山留め支保工を施し、前記隣地境界に面した壁を隣地地盤に固着する第1工程と、
    前記隣地境界に面した外殻部を構成する壁、又は壁及び柱を残して、内側のスラブや柱、仕切壁、耐圧板等の内側地下構造物を解体撤去して中空スペースとする第2工程と、
    前記地下構造物の基礎固めのために打ち込まれていた基礎杭を撤去し、基礎杭撤去後の杭跡を埋め戻す第3工程と、
    前記隣地境界に面した外殻部を構成する壁、又は壁及び柱を下部から順次切断して撤去するとともに、前記壁、又は壁及び柱を撤去するごとに、撤去した部分に対応する中空スペースに土砂を埋め戻す第4工程と、
    でなることを特徴とする基礎杭を有する地下構造物の解体撤去工法。
    It is a demolition removal method of an underground structure having a foundation pile built adjacent to the adjacent land,
    In order to prevent the adjacent land from collapsing due to the removal of the underground structure, prior to the dismantling and removal, a borehole that penetrates the wall of the underground structure facing the boundary of the adjacent structure of the underground structure and goes diagonally below the adjacent ground. A plurality of holes arranged side by side in a plane, a ground anchor or a ground-reinforced soil is installed in each of the boreholes, and a mountain retaining support is applied, and a wall facing the boundary of the adjacent land is fixed to the adjacent ground; ,
    A second part is a hollow space formed by dismantling and removing inner underground structures such as inner slabs, pillars, partition walls, pressure plates, etc., leaving walls or walls and pillars constituting the outer shell part facing the border of the adjacent land. Process,
    A third step of removing the foundation piles that have been driven to solidify the foundation of the underground structure, and backfilling the pile marks after the foundation pile removal;
    A hollow space corresponding to the removed part each time the wall or wall and pillar is removed by sequentially cutting and removing the wall or wall and pillar constituting the outer shell part facing the border of the adjacent land from the lower part. The fourth step of backfilling earth and sand,
    Deconstruction and removal method for underground structures with foundation piles.
  2. 前記地下構造物の隣地境界に面した外殻部を構成する壁を隣地地盤に固着するグランドアンカー又は地山補強土等を設置して山留め支保工を施す複数個のボーリング孔が、前記外殻部を構成する壁、又は壁と柱を下方から切断して撤去する際、壁又は壁及び柱の切断部分の撤去によって隣地地盤が崩落しないよう、隣地地盤の状態に対応した上下間隔、及び深さで穿設されてなることを特徴とする請求項1に記載の基礎杭を有する地下構造物の解体撤去工法。
    A plurality of boring holes for installing a ground anchor or a ground reinforcing soil or the like for fixing a wall constituting the outer shell portion facing the boundary of the adjacent ground of the underground structure to the adjacent ground, When cutting and removing the walls or walls and pillars that make up the section from below, the vertical distance and depth corresponding to the condition of the neighboring ground should be kept so that the neighboring ground will not collapse due to the removal of the cut parts of the walls or walls and pillars. The method for dismantling and removing an underground structure having a foundation pile according to claim 1, wherein the structure is drilled.
JP2008084436A 2008-03-27 2008-03-27 Construction method for dismantlement and removal of underground structure having foundation pile Pending JP2009235809A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102733419A (en) * 2012-04-01 2012-10-17 中国水电顾问集团贵阳勘测设计研究院 Supporting structure of underground plant floor slab and construction method
KR101481073B1 (en) 2014-03-17 2015-01-13 주식회사 승일토건 Method for removing underground structure
CN110374191A (en) * 2019-07-31 2019-10-25 同济大学建筑设计研究院(集团)有限公司 A kind of outer wall of basement component and its construction method with protective function
CN111139869A (en) * 2020-01-22 2020-05-12 江苏科技大学 Excavation type high-waterproof comprehensive pipe gallery structure and construction method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102733419A (en) * 2012-04-01 2012-10-17 中国水电顾问集团贵阳勘测设计研究院 Supporting structure of underground plant floor slab and construction method
KR101481073B1 (en) 2014-03-17 2015-01-13 주식회사 승일토건 Method for removing underground structure
CN110374191A (en) * 2019-07-31 2019-10-25 同济大学建筑设计研究院(集团)有限公司 A kind of outer wall of basement component and its construction method with protective function
CN111139869A (en) * 2020-01-22 2020-05-12 江苏科技大学 Excavation type high-waterproof comprehensive pipe gallery structure and construction method thereof

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