JPH0826538B2 - Sediment backfilling method - Google Patents
Sediment backfilling methodInfo
- Publication number
- JPH0826538B2 JPH0826538B2 JP62064046A JP6404687A JPH0826538B2 JP H0826538 B2 JPH0826538 B2 JP H0826538B2 JP 62064046 A JP62064046 A JP 62064046A JP 6404687 A JP6404687 A JP 6404687A JP H0826538 B2 JPH0826538 B2 JP H0826538B2
- Authority
- JP
- Japan
- Prior art keywords
- soil
- backfilling
- treated soil
- lightweight
- sand
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 18
- 239000013049 sediment Substances 0.000 title description 5
- 239000002689 soil Substances 0.000 claims description 68
- 239000000463 material Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000004576 sand Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 description 9
- 239000004568 cement Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 239000004088 foaming agent Substances 0.000 description 6
- 239000010802 sludge Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 3
- 239000003562 lightweight material Substances 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229920006328 Styrofoam Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、掘削工事等で発生した建設残土、有害物で
汚染された土壌あるいはヘドロ等の土砂を、水とセメン
ト系あるいは石灰系固化材および軽量粒子または泡と共
に、混合、均質分散させた軽量処理土を利用することに
よって、安全かつ有効に埋戻し、裏込、空洞充填等へ適
用する土砂埋戻し充填工法に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to construction residual soil generated during excavation work, soil contaminated with harmful substances, or sediment such as sludge, and water, cement-based or lime-based solidifying material. The present invention also relates to a backfilling method for earth and sand that is applied to backfilling, backfilling, cavity filling, etc., safely and effectively by using a lightweight treated soil that has been mixed and homogeneously dispersed with lightweight particles or bubbles.
＜従来の技術＞ 従来、埋戻し工法においては、掘削残土等を埋戻し材
としてそのまま利用できる土は、ごく一部の良質土砂に
限られ、大部分が山砂等を搬入し、それを締固めて使用
する方法が採られていた。近年、資源、環境等の諸事情
により、不良土砂を有効に使用する動きが見られるよう
になり、中でも、セメント系あるいは石灰系固化材と混
合し、埋戻し材として固化性をもたせた上で埋戻しを行
なう方法が徐々に多く採用されるようになってきてい
る。<Prior art> Conventionally, in the backfilling method, the soil that can be used as the backfill material, such as excavated soil, is limited to only a small portion of good quality sand, and most of it is loaded with mountain sand and tightened. The method of solidifying and using it was adopted. In recent years, due to various circumstances such as resources and the environment, there has been a movement to effectively use bad soil, and in particular, it is mixed with cement-based or lime-based solidifying material, and after being solidified as a backfill material. The method of backfilling has been gradually adopted more and more.
山砂等に置換する埋戻し方法、固化材を混合する埋戻
し方法のいずれも締固めを必要とする方法であり、締固
め状態が品質の良否に及ぼす影響が大きい。特に、埋設
管等の設置に伴なう埋戻しにおいては、埋設管等周辺部
の締固めが難しく、そこが弱点となり易い。交通荷重や
地震力が作用すると締固め不十分の部分が徐々に締まる
ことにより、表面においては不陸が発生し、平坦性が損
われることになる。また、その場合、埋設管等に過大な
応力が発生し易く、破損に連ながることにもなる。橋
台、擁壁等の裏込工法においても、同様のことが問題と
なっている。Both the backfilling method of replacing with sand and the like and the backfilling method of mixing with a solidifying material require compaction, and the compacted state has a great influence on the quality. In particular, in backfilling accompanying the installation of a buried pipe or the like, it is difficult to compact the peripheral portion of the buried pipe or the like, and this tends to be a weak point. When a traffic load or seismic force is applied, the insufficiently compacted portion is gradually tightened, causing unevenness on the surface and impairing the flatness. Further, in that case, excessive stress is likely to be generated in the buried pipe or the like, which leads to damage. The same problem occurs in the backfilling method for abutments and retaining walls.
埋戻し充填工法として、できるだけ地山の性状に近い
埋戻し充填土が均質な状態で施工形成される方法が希求
されている現状である。As a backfilling method, there is a demand for a method in which backfilling soil that is as close as possible to the nature of the ground is constructed and formed in a homogeneous state.
掘削土砂を固化材と混合して使用する方法には、水を
多量に添加し、処理土に流動性を付与し、充填性を良く
することによって均質な埋戻し充填土を施工形成する方
法も考えられるが、従来十分な混合ができないため、処
理土を埋戻し充填土として適当な強度にコントロールす
ることが困難であった。すなわち、処理土に高い流動性
と地山強度並みの圧縮強度１〜5kg/cm2の発現性を設定
しようとすると、水を多く添加することになり、そのた
めに、混合状態が悪くなって材料分離性の大きい処理土
になってしまう。そのために、処理土の圧縮強度を低く
設定すると、材料分離に伴うブリージングにより、埋設
管等の底辺部に空洞が生じたり、浅い部分の強度が低く
なってしまう。また、品質のバラツキも大きい。このよ
うなことから、従来は、材料分離および品質のバラツキ
を考慮し、それらを補うために、処理土の設定強度が、
埋戻し充填土用としては、必要以上に高い値を採用して
いた。固化材コストもそれだけ高くなっていた。As a method of mixing excavated soil with a solidifying material, a method of adding a large amount of water to impart fluidity to treated soil and improving fillability to form a uniform backfilled soil is also possible. It is considered possible, but it has been difficult to control the treated soil to an appropriate strength as a backfill soil because sufficient mixing has not been possible conventionally. That is, if it is attempted to set the treated soil to have a high fluidity and a compressive strength of 1 to 5 kg / cm 2 which is similar to the natural strength, a large amount of water will be added, and the mixed state will deteriorate and the material The treated soil has a large separation property. Therefore, if the compressive strength of the treated soil is set to be low, bleeding accompanying the material separation causes a cavity at the bottom of the buried pipe or the like, or the strength of the shallow portion becomes low. In addition, there are large variations in quality. Therefore, conventionally, in consideration of material separation and variation in quality, in order to supplement them, the set strength of the treated soil is
A higher value than necessary was used for backfilling soil. The cost of solidifying material was also higher.
＜発明が解決しようとする問題点＞ 本発明者らは、前記事情に鑑み、地山の性状に近い埋
戻し充填土を形成するために、高い品質の処理土を製造
し、施工に適用することを目的として鋭意検討を行なっ
た。<Problems to be Solved by the Invention> In view of the above circumstances, the present inventors produce high-quality treated soil and apply it to construction in order to form backfilled soil that is close to the nature of the ground. For that purpose, we have made earnest studies.
＜問題点を解決するための手段＞ その結果、特種のミキサーを使用して、土砂に水と固
化材と軽量材を混合撹拌することにより、上記問題点を
解決し得ることを見出し、かかる知見に基づいて本発明
を達成した。<Means for Solving Problems> As a result, it has been found that the above problems can be solved by mixing and stirring water, a solidifying material, and a lightweight material in earth and sand using a special kind of mixer, The present invention has been achieved based on
すなわち本発明は、往復回転式撹拌によって、土砂に
水と固化材および軽量粒子または気泡を混合撹拌するこ
とにより、高度の均質分散性および流動性、さらに材料
分離性の小さい地山強度相当の強度発現性を持たせた軽
量処理土を、短時間に製造供給し、該軽量処理土を用い
て転圧をすることなく、埋設管設置溝の埋戻し充填また
は擁壁、橋台等の裏込充填をすることを特徴とする土砂
埋戻し充填工法を提供するものである。That is, the present invention, by reciprocating rotary stirring, by mixing and stirring water and solidifying material and lightweight particles or bubbles in the earth and sand, high homogeneity dispersibility and fluidity, further the strength equivalent to the natural ground strength of small material separation property. Manufacture and supply of lightweight treated soil with expressive properties in a short period of time, and backfilling of buried pipe installation grooves or backfilling of retaining walls, abutments, etc. without rolling using the lightweight treated soil. The present invention provides a backfilling method for earth and sand, which is characterized by
本発明において、往復回転式撹拌とは、適当な形状の
撹拌翼を有する撹拌軸が一方回転でなく、例えば1/4回
転毎に反転し、撹拌効率を高めるものである。In the present invention, the reciprocating rotary stirring means that the stirring shaft having an appropriately shaped stirring blade does not rotate in one direction but is inverted every 1/4 rotation, for example, to enhance stirring efficiency.
本発明は、従来法の前記欠点を解消し、以下のような
特長を有する。The present invention solves the above-mentioned drawbacks of the conventional method and has the following features.
（イ） 土砂、水およびセメント系あるいは石灰系固化
材並びに軽量材から成る処理土が、高い流動性を持ち、
十分なポンプ圧送性および充填性を有する。(A) Treated soil composed of sediment, water, cement-based or lime-based solidifying material, and lightweight material has high fluidity,
It has sufficient pumpability and filling properties.
（ロ） 土砂および固化材並びに軽量材が高度に分散さ
れた状態にあり、強度発現性を地山強度程度に設定する
ために、多量の水を添加した場合でも、材料分離性が小
さく、品質のバラツキも小さい。(B) Sediment and solidification material and lightweight material are in a highly dispersed state, and even if a large amount of water is added in order to set the strength development to the level of natural strength, the material separation is small and the quality is high. Variation is small.
（ハ） 処理土が軽量化されているので、その単位体積
重量を大幅に低くすることができ、埋戻し充填土の土圧
を低減することができる。(C) Since the treated soil is lightened, the unit volume weight can be significantly reduced, and the earth pressure of the backfill soil can be reduced.
本発明の工法は、処理土の土砂が汚染土壌またはヘド
ロの場合も好適に施工することができる。汚染土壌およ
びヘドロの固化による有害物質の封じ込め処理は、セメ
ント系固化材等により、水和物成分中に有害物質を取り
込むことが主原理である。粒子が十分に分散されて始め
て処理が十分となる。よって本発明を適用した場合、処
理がほぼ完全になるとともに、固化材の使用量も従来方
法に比べて節約が可能になる。The construction method of the present invention can be suitably applied even when the treated soil is contaminated soil or sludge. The main principle of containment of harmful substances due to solidification of contaminated soil and sludge is to incorporate the harmful substances into the hydrate components by means of cement-based solidifying material or the like. The treatment is sufficient only when the particles are well dispersed. Therefore, when the present invention is applied, the treatment becomes almost complete and the amount of the solidifying material used can be saved as compared with the conventional method.
さらに、本発明では、前記施工方法において、発泡ス
チロール粒子、起泡剤、発泡剤等による気泡を混入して
処理土を軽量化することにより埋戻し充填土の土圧を低
減することができる。この場合、処理土の単位体積重量
を大幅に低くすることが可能になる。これにより、構造
物に作用する埋戻し充填土土圧が低く抑えられ、構造物
の安全性の増加、構造物の断面縮少によるコスト低下等
の効果が生じる。また、本発明工法においては交換後転
圧を行なわず、埋戻し充填による上載圧の増加を低く抑
えることができることから、圧密沈下が問題とされるよ
うな地盤においても、施工は可能となる。この場合、処
理土は、固化後も多くの独立空隙、気泡を含むことか
ら、軽量化されると共に高い断熱性を持つことになる。
この断熱性を利用して、処理土を住宅、工場、倉庫等建
築物の床下に充填し、床下からの熱の拡散を抑制し、保
温性を向上させることができる。さらに、この場合、室
内温度調整のためのエネルギーコストの低下が可能にな
る。Further, in the present invention, in the above-mentioned construction method, the soil pressure of the backfilled soil can be reduced by mixing the foamed polystyrene particles, the foaming agent, the foaming agent and the like to reduce the weight of the treated soil. In this case, the unit volume weight of the treated soil can be significantly reduced. As a result, the backfill soil pressure acting on the structure is suppressed to a low level, and the safety of the structure is increased and the cost is reduced due to the reduction in the cross section of the structure. Further, in the method of the present invention, since the compaction after replacement is not performed and the increase of the overloading pressure due to the backfilling can be suppressed to a low level, the construction can be performed even on the ground where consolidation settlement is a problem. In this case, since the treated soil contains many independent voids and bubbles even after being solidified, the treated soil is lightweight and has high heat insulating properties.
By utilizing this heat insulating property, it is possible to fill the treated soil under the floor of a building such as a house, a factory, a warehouse, suppress the diffusion of heat from under the floor, and improve the heat retention. Further, in this case, the energy cost for adjusting the indoor temperature can be reduced.
＜実施例＞ 次に、実施例により本発明をさらに具体的に図面に基
づいて説明する。<Examples> Next, the present invention will be described more specifically with reference to the drawings by Examples.
第１図に示すように、往復回転式撹拌機〔（株）島崎
製作所製「アジター」〕を使用して、容器３中で、掘削
土砂、水およびセメトン系固化材の１パッチ0.5m3の量
を、200サイクル／分にて３分間混合することによって
製造された処理土４をポンプにて圧送し、埋戻し充填を
行った。掘削土砂はロームのように高い粘性を有する土
も高度に分散され、多量の水を添加しているにも拘ら
ず、ブリージングもなく、配合の調整により、Ｐロート
を用いた流下時間を10〜20秒に、また、圧縮強度を材令
28日において１〜10kg/cm2の間で調節することができ
た。往復回転式撹拌機は、三角形断面の撹拌翼２を撹拌
軸１に取り付けた構造になっており、1/4回転毎に反転
する。粘着力の高い土も強力な上下乱流の発生により、
高度に分散される。As shown in FIG. 1, a reciprocating rotary stirrer [“Agitator” manufactured by Shimazaki Seisakusho Co., Ltd.] was used to deposit 0.5 m 3 of 1 patch of excavated soil, water, and cement-based solidifying material in container 3 . The treated soil 4 produced by mixing the amounts at 200 cycles / minute for 3 minutes was pumped under pressure to backfill. The excavated soil is highly viscous soil such as loam, which is highly dispersed. Even though a large amount of water is added, there is no breathing and the mixing time is adjusted by adjusting the composition to reduce the run-down time to 10 ~. In 20 seconds, the compressive strength
It could be adjusted between 1 and 10 kg / cm 2 in 28 days. The reciprocating rotary agitator has a structure in which an agitating blade 2 having a triangular cross section is attached to an agitating shaft 1 and is inverted every 1/4 rotation. Due to the generation of strong vertical turbulence in soil with high adhesive strength,
Highly distributed.
容器３において起泡剤、発泡剤、あらかじめ起泡剤を
用いて製造した泡および発泡スチロール粒子等を、土
砂、セメント系固化材および水の混合物のなかに投入
し、さらに混合撹拌することにより、均質な軽量化処理
土４′を製造した。土としてロームを使用し、単位体積
重量1.0g/cm3、Ｐロート流下時間15秒、材令28日におけ
る圧縮強度1.0kg/cm2の軽量化処理土４′が起泡剤を利
用して製造された。有害土壌あるいはヘドロも高度に分
散され、また有害物質が封じ込められることから、均質
度の高い、さらに安全性の高い処理土４″が前記方法に
より製造される。In a container 3, a foaming agent, a foaming agent, foam produced using a foaming agent in advance, styrofoam particles, and the like are put into a mixture of earth and sand, a cement-based solidifying material, and water, and further mixed and stirred to obtain a homogeneous mixture. A lightweight soil 4'was manufactured. Using soil as loam, the unit volume weight 1.0g / cm 3 , P funnel flow time 15 seconds, compressive strength 1.0kg / cm 2 at the age of 28 days The lightweight treated soil 4'uses a foaming agent. manufactured. Since the harmful soil or sludge is highly dispersed and the harmful substances are contained, the treated soil 4 ″ having high homogeneity and high safety is produced by the above method.
第２図は、処理土４あるいは軽量化処理土４′を埋設
管５の回りに埋戻し充填した場合を示す。また、第３図
は、処理土４あるいは軽量化処理土４′を擁壁６の裏込
として充填した場合を示す。処理土４および軽量化処理
土４′は、バイブレータを使わなくても、充填性が良い
ことから、埋設管５底部等の狭いところへも十分に行き
渡り、欠陥のない、均質な埋度し充填が行えた。埋設管
５または擁壁６には、不均質な埋戻しを原因とする過大
な応力の発生も見られなかった。軽量化処理土４′を使
用した場合、埋設管５および擁壁６に作用する土圧がか
なり低下し、発生する応力も低く抑えられた。処理土４
および軽量化処理土４′の材令28日における圧縮強度
は、地山強度並みということで2kg/cm2としたが、交通
開放後も表面に不陸が発生することもなかった。また、
人力によるスコップを用いた再掘削も容易であった。FIG. 2 shows a case where the treated soil 4 or the weight-reduced treated soil 4 ′ is backfilled around the buried pipe 5. Further, FIG. 3 shows a case where the treated soil 4 or the weight-reduced treated soil 4 ′ is filled as the backfill of the retaining wall 6. The treated soil 4 and the lightweight treated soil 4'have a good filling property without using a vibrator, so that the treated soil 4 and the weight-reduced soil 4'can sufficiently spread to a narrow place such as the bottom of the buried pipe 5 and have a uniform filling with no defects. Was done. Neither the buried pipe 5 nor the retaining wall 6 was found to have excessive stress due to non-uniform backfilling. When the weight-reduced soil 4'is used, the earth pressure acting on the buried pipe 5 and the retaining wall 6 is considerably reduced, and the generated stress is also kept low. Treated soil 4
Compressive strength at wood age 28 days and weight treated soil 4 'is set to 2 kg / cm 2 in that the natural ground strength comparable, after transportation open Furiku also on the surface did not also occur. Also,
Re-excavation using a manual scoop was also easy.
＜発明の効果＞ 本発明工法によれば、前述したように、掘削工事等で
発生した建設残土、有害物で汚染された土壌あるいはヘ
ドロ等の土砂を、安全かつ有効に、埋戻し、裏込、空洞
充填等に適用することができる。<Effects of the Invention> According to the method of the present invention, as described above, the construction surplus soil, soil contaminated with harmful substances, or sediment such as sludge generated in excavation work can be backfilled and backfilled safely and effectively. It can be applied to cavity filling, etc.
添付図面は、本発明工法の一例を示す説明図で、第１図
は、往復回転式撹拌機により処理土を製造する状態を示
す。第２図は、処理土の埋設管設置溝への埋戻し充填の
状態、第３図は、処理土の擁壁裏込部への充填の状態を
それぞれ示す。 １……往復回転式撹拌機の撹拌軸、２……同撹拌機の撹
拌翼、３……容器、４……掘削土の処理土、４′……軽
量化処理土、４″……有害土壌あるいはヘドロの処理
土、５……埋設管、６……擁壁、The attached drawings are explanatory views showing an example of the method of the present invention, and FIG. 1 shows a state in which treated soil is produced by a reciprocating rotary agitator. FIG. 2 shows the state of backfilling of the treated soil into the buried pipe installation groove, and FIG. 3 shows the state of backfilling of the treated soil into the back wall of the retaining wall. 1 ... Reciprocating rotary stirrer stirring shaft, 2 ... Stirrer stirring blade, 3 ... Vessel, 4 ... Treated soil for excavated soil, 4 '... Treated soil for reducing weight, 4 "... Harmful Soil or sludge treated soil, 5 ... buried pipe, 6 ... retaining wall,
Claims (1)
材および軽量粒子または気泡を混合攪拌することによ
り、高度の均質分散性および流動性、さらに材料分離性
の小さい地山強度相当の強度発現性を持たせた軽量処理
土を、短時間に製造供給し、該軽量処理土を用いて転圧
をすることなく、埋設管設置溝の埋戻し充填または擁
壁、橋台等の裏込充填をすることを特徴とする土砂埋戻
し充填工法。1. A reciprocating rotary agitator is used to mix and agitate water with a solidifying material and light weight particles or bubbles in earth and sand to obtain a high homogeneity dispersibility and fluidity, and a strength equivalent to the natural ground strength with a small material separation property. Manufacture and supply of lightweight treated soil with expressive properties in a short period of time, and backfilling of buried pipe installation grooves or backfilling of retaining walls, abutments, etc. without rolling using the lightweight treated soil. A method of backfilling with earth and sand that is characterized by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62064046A JPH0826538B2 (en) | 1987-03-20 | 1987-03-20 | Sediment backfilling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62064046A JPH0826538B2 (en) | 1987-03-20 | 1987-03-20 | Sediment backfilling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63233115A JPS63233115A (en) | 1988-09-28 |
| JPH0826538B2 true JPH0826538B2 (en) | 1996-03-13 |
Family
ID=13246768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62064046A Expired - Fee Related JPH0826538B2 (en) | 1987-03-20 | 1987-03-20 | Sediment backfilling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0826538B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01312118A (en) * | 1988-06-11 | 1989-12-15 | Mitsubishi Mining & Cement Co Ltd | Strength-applied backfilled material and backfilling construction with its material |
| JP2831441B2 (en) * | 1990-06-19 | 1998-12-02 | 住友大阪セメント株式会社 | Stabilized soil and construction method using stabilized soil |
| JP2573898B2 (en) * | 1992-04-24 | 1997-01-22 | 株式会社双葉工務店 | Light weight stabilization method for soft ground and light weight stabilization structure for soft ground |
| JP2742862B2 (en) * | 1993-04-30 | 1998-04-22 | 利根地下技術株式会社 | Low-rise building foundation ground improvement method |
| JP4692701B2 (en) * | 2001-01-17 | 2011-06-01 | 常太郎 岩淵 | Compaction method |
| KR100451093B1 (en) * | 2001-03-09 | 2004-10-02 | 보경산업개발 주식회사 | Lightweight fill materials using waste styrofoam beads |
| KR100467860B1 (en) * | 2001-12-20 | 2005-01-24 | 주성건설 합자회사 | retaining wall system using changeable drain system |
| KR100451092B1 (en) * | 2003-10-17 | 2004-10-06 | 보경산업개발 주식회사 | Lightweight fill method applying lightweight fill materials using waste styrofoam beads |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS505973U (en) * | 1973-05-11 | 1975-01-22 | ||
| JPS582284B2 (en) * | 1976-04-23 | 1983-01-14 | 株式会社熊谷組 | How to improve sludge ground |
| JPS6049734B2 (en) * | 1980-12-26 | 1985-11-05 | 守雄 屋敷 | How to form a basement |
| JPS57108321A (en) * | 1980-12-26 | 1982-07-06 | Morio Yashiki | Construction of foundation for building and structure |
-
1987
- 1987-03-20 JP JP62064046A patent/JPH0826538B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63233115A (en) | 1988-09-28 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |