JPS6340015A - Foundation pile for relieving negative frictional force - Google Patents
Foundation pile for relieving negative frictional forceInfo
- Publication number
- JPS6340015A JPS6340015A JP18231286A JP18231286A JPS6340015A JP S6340015 A JPS6340015 A JP S6340015A JP 18231286 A JP18231286 A JP 18231286A JP 18231286 A JP18231286 A JP 18231286A JP S6340015 A JPS6340015 A JP S6340015A
- Authority
- JP
- Japan
- Prior art keywords
- pile
- layer
- protective layer
- foundation pile
- inorganic filler
- 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.)
- Pending
Links
- 239000011241 protective layer Substances 0.000 claims abstract description 20
- 239000003190 viscoelastic substance Substances 0.000 claims abstract description 14
- 239000011256 inorganic filler Substances 0.000 claims abstract description 11
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 11
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 11
- 229940006076 viscoelastic substance Drugs 0.000 claims abstract description 7
- 239000012791 sliding layer Substances 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000011152 fibreglass Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims 1
- 239000004814 polyurethane Substances 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 abstract description 15
- 239000010410 layer Substances 0.000 abstract description 14
- 229910000831 Steel Inorganic materials 0.000 abstract description 11
- 239000010959 steel Substances 0.000 abstract description 11
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 7
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 230000032798 delamination Effects 0.000 abstract 1
- 239000011247 coating layer Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- -1 polytetramethylene Polymers 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 239000010426 asphalt Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000005056 polyisocyanate Substances 0.000 description 4
- 229920001228 polyisocyanate Polymers 0.000 description 4
- 229920005862 polyol Polymers 0.000 description 3
- 150000003077 polyols Chemical class 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000012237 artificial material Substances 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000921 polyethylene adipate Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
Description
【発明の詳細な説明】 −の１ 本発明は、負摩擦力軽減用基礎杭に関するものである。[Detailed description of the invention] -1 The present invention relates to a foundation pile for reducing negative frictional force.
従来少肢血
軟弱な地盤、例えば粘土層、泥炭層の上に建造物を構築
しなければならない場合、一般に垂直な基礎部材、例え
ばコンクリートまたは鋼管の基礎杭が適用される。BACKGROUND OF THE INVENTION When a building has to be constructed on soft ground, such as clay or peat, vertical foundation members, such as concrete or steel pipe foundation piles, are generally used.
これらの基礎部材の先端は支持層の上に置かれ、一方あ
る場合には、これに加えて建造物の重量の一部は軟弱な
土層によって支持されている。すなわち、土層が充分に
沈下圧密されていれば、基礎杭の周面摩擦力は先端の支
持力とともに建造物の重量すなわち荷重の吸収にあずか
るが、しかし地盤が沈下、圧密の過程にあり、杭の打設
後もこれが進行している場合、下方への周面摩擦力、す
なわち負の摩擦力が生じ、基礎杭の支持力を著しく低下
させるため杭の沈下もしくは座屈が誘発される。The tops of these foundation members rest on a support layer, while in some cases additionally part of the weight of the structure is supported by a soft soil layer. In other words, if the soil layer is sufficiently settled and consolidated, the circumferential frictional force of the foundation pile will absorb the weight of the building, or the load, together with the supporting force at the tip. However, if the ground is in the process of settling and consolidation, If this continues even after the pile has been driven, a downward circumferential frictional force, that is, a negative frictional force is generated, which significantly reduces the supporting capacity of the foundation pile and induces sinking or buckling of the pile.
従来、このような負の摩擦力を軽減するための基礎杭と
して例えば、基礎杭の外周面にビチューメンからなる被
覆層を塗布形成したもの（特公昭５６−４６０１２号）
、鋼管抗体の外周面にビチューメンのごとき粘弾性物質
からなるすべり層を形成し、さらにその表面に合成樹脂
のシートの外層波１を施した被覆層（実公昭５３−２１
８４１号および実公昭５６−４３５９７号）等が知られ
ている。Conventionally, as a foundation pile to reduce such negative frictional force, for example, a coating layer made of bitumen was applied to the outer peripheral surface of the foundation pile (Japanese Patent Publication No. 56-46012).
, a coating layer consisting of a slip layer made of a viscoelastic material such as bitumen is formed on the outer circumferential surface of a steel pipe body, and an outer layer 1 of a synthetic resin sheet is applied to the surface of the slip layer (Utility Model Publication No. 53-21).
No. 841 and Utility Model Publication No. 56-43597) are known.
へ■ く ４しよ゛と る。 占
しかしながら上記において、前者は、夏季保管時に粘弾
性物質が軟化して運搬が困難である、打込み時にすべり
層が剥離する、ぎらに土や石が食い込む等の欠点がある
。Let's go to 4. However, the former has drawbacks such as the viscoelastic material softening during summer storage and being difficult to transport, the sliding layer peeling off during driving, and soil and stones digging into the glaze.
後者は前者の欠点を改良したものであるが、工場生産時
の合成樹脂被覆層の硬化又は冷却固化時の収縮により被
ＷＬＮに凹凸が生じる、夏季屋外保管時に粘弾性物質が
軟化して合成樹脂被覆層に変形、クラック、剥離及びふ
くれ等が生じる等の欠点がある。The latter improves the drawbacks of the former, but the WLN to be covered has unevenness due to hardening of the synthetic resin coating layer during factory production or shrinkage during cooling and solidification, and the viscoelastic substance softens during outdoor storage in the summer, causing the synthetic resin to harden. There are drawbacks such as deformation, cracking, peeling, and blistering of the coating layer.
これらは軟化点が低く針入度が高い粘弾性物質を使用し
、かつ合成樹脂の厚みが薄い又は合成樹脂としてクロス
へラドダイにより押出被覆した熱可塑性樹脂を使用した
場合、顕著に認められる。These problems are noticeable when a viscoelastic substance with a low softening point and high penetration is used, and the synthetic resin is thin, or a thermoplastic resin extruded and coated with a cross-layer rad die is used as the synthetic resin.
。 占 ηン るための
本発明者らは上記欠点を解決するために鋭意研究を重ね
た結果、本発明を提供するに至ったものである。すなわ
ち、杭の外周面に粘弾性物質からなるすべり層を形成さ
せた後、さらに該すべり層の外周面に保護層を形成させ
た負摩擦力軽減用基礎杭において、該保護層がポリウレ
タン樹脂に線膨張係数０． Ｉ Ｘ １０−’／”Ｃ以
下の無機充填剤をポリウレタン樹脂に対して５〜２００
重量％配合したものであることを特徴とする負摩擦力軽
減用基礎杭である。. The present inventors have conducted extensive research to solve the above-mentioned drawbacks, and as a result, have come up with the present invention. That is, in a foundation pile for reducing negative friction, in which a sliding layer made of a viscoelastic substance is formed on the outer peripheral surface of the pile, and a protective layer is further formed on the outer peripheral surface of the sliding layer, the protective layer is made of polyurethane resin. Linear expansion coefficient 0. Inorganic filler of I
This is a foundation pile for reducing negative friction force, characterized in that it contains % by weight.
本発明の杭としては、例えば鋼管杭、Ｈ型鋼、■型鋼ま
たはコンクリート杭が挙げられるが、軟弱地盤で使用さ
れている基礎杭であれば、特に限定するものではない。The piles of the present invention include, for example, steel pipe piles, H-shaped steel, ■-shaped steel, and concrete piles, but are not particularly limited as long as they are foundation piles used on soft ground.
本発明のポリウレタン樹脂としては、水酸基を２１１Ｍ
以上有する化合物とイソシアネート基を２個以上有する
化合物を反応させて得たものが挙げられる。The polyurethane resin of the present invention has 211M hydroxyl groups.
Examples include those obtained by reacting a compound having the above with a compound having two or more isocyanate groups.
水酸基を２個以上有する化合物としては、ポリオキシア
ルキレンポリオール、ポリテトラメチレングリコールな
どのポリエーテルポリオール、ポリエチレンアジペート
、ポリブチレンアジペートなどのポリエステルポリオー
ル、ポリブタジェンポリオール、ヒマシ油などが挙げら
れる。Examples of compounds having two or more hydroxyl groups include polyoxyalkylene polyols, polyether polyols such as polytetramethylene glycol, polyester polyols such as polyethylene adipate and polybutylene adipate, polybutadiene polyols, and castor oil.
また、イソシアネート基を２個以上有する化合物として
は、トリレンジイソシアネート、ジフェニルメタンジイ
ソシアネート、ポリフェニレンポリメチレンポリイソシ
アネート、ヘキサメチレンジイソシアネート、キシリレ
ンジイソシアネートなどが挙げられる。Examples of the compound having two or more isocyanate groups include tolylene diisocyanate, diphenylmethane diisocyanate, polyphenylene polymethylene polyisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, and the like.
これらの水酸基を２個以上有する化合物とポリイソシア
ネート化合物からポリウレタン樹脂を得る場合、水酸基
を２個以上有する化合物の混合液とポリイソシアネート
化合物を混合すると同時に硬化させるホンショット法、
水酸基を２個以上有する化合物の一部とポリイソシアネ
ート化合物を予め反応させた液にさらに水酸基を２個以
上有する化合物を混合して硬化させるプレポリマー法等
があるが、本発明においては、いずれの方法でもかまわ
ない。When obtaining a polyurethane resin from a compound having two or more of these hydroxyl groups and a polyisocyanate compound, a hon-shot method in which a mixture of a compound having two or more hydroxyl groups and a polyisocyanate compound is mixed and simultaneously cured;
There is a prepolymer method in which a part of a compound having two or more hydroxyl groups and a polyisocyanate compound are reacted in advance, and a compound having two or more hydroxyl groups is further mixed and cured. It doesn't matter which method you use.
本発明の線膨張係数０． Ｉ Ｘ １０−４／℃以下の
無機充填剤としては、ケイ酸またはアルミナを主体とし
て化合物が挙げられ、具体的には天然物として、ケイ酸
を主体とするクレー類、ケイ酸アルミニウム、カオリン
クレー等が挙げられ、人工物としてガラス繊維を粉砕し
たもの、例えばチョツプドファイバーガラス、ミルドフ
ァイバーガラスが挙げられるが好ましくはファイバーガ
ラス等である。The linear expansion coefficient of the present invention is 0. Examples of inorganic fillers with an I Examples of the artificial material include crushed glass fibers, such as chopped fiber glass and milled fiber glass, but fiber glass is preferable.
本発明にかかる負摩擦力軽減用基礎杭としては、前記杭
の外周面に粘弾性物質（例えばアスファルト系粘弾性物
質等）からなるすべり層を形成させた後、さらに該すべ
り層の外周面に保護層として前記ポリウレタン樹脂に前
記線膨張係数０．１ Ｘ １０−４ ／ ”Ｃ以下の無
機充填剤を配合した配合物の保護層を形成させたものが
挙げられる。The foundation pile for reducing negative frictional force according to the present invention is provided by forming a sliding layer made of a viscoelastic material (for example, an asphalt-based viscoelastic material, etc.) on the outer peripheral surface of the pile, and then forming a sliding layer on the outer peripheral surface of the sliding layer. As the protective layer, a protective layer formed of a blend of the polyurethane resin and an inorganic filler having a coefficient of linear expansion of 0.1 x 10-4/''C or less may be used.
すべり層の外周面に保護層を形成させるために使用する
ポリウレタン樹脂と線膨張係数０． Ｉ Ｘ １０−４
／ ”Ｃ以下の無機充填剤の配合割合は、線膨張係数
０． Ｉ Ｘ １０−’／”Ｃ以下の無機充填剤がポリ
ウレタン樹脂に対して５〜２００重量％となる割合であ
る。The polyurethane resin used to form a protective layer on the outer peripheral surface of the sliding layer has a coefficient of linear expansion of 0. IX 10-4
The blending ratio of the inorganic filler having a coefficient of linear expansion of 0.I x 10-'/"C or less is 5 to 200% by weight of the polyurethane resin.
線膨張係数０．Ｉ Ｘ Ｌ Ｏ−４／”ｃ以下の無機充
填剤を配合する場合、微量の水分を含んでいたり弱塩基
性であるため、液の安定性から水酸基を２個以上有する
化合物に配合することが好ましい。Linear expansion coefficient 0. When blending an inorganic filler with an I preferable.
保護層の厚さは０．５龍〜５１が好ましい。The thickness of the protective layer is preferably 0.5 mm to 5 mm.
保護層の厚さが０．５ ａｍより薄い場合、基礎杭を段
積みしたときにすべり層が変形したり、吊下げたときに
保護層に切断がおこりやすく、また保護層の厚さが５ｆ
ｉより厚い場合、上記のような欠点はないが、経済性の
点から不利である。If the thickness of the protective layer is thinner than 0.5 am, the sliding layer may be deformed when the foundation piles are stacked, or the protective layer is likely to be cut when suspended.
If it is thicker than i, there will be no disadvantages as described above, but it will be disadvantageous from an economic point of view.
本発明においては、必要に応じて触媒、着色顔料、安定
剤などの添加剤を配合しても良い。In the present invention, additives such as catalysts, coloring pigments, and stabilizers may be added as necessary.
弁皿Ω豆果
本発明に従って得られる負摩擦力軽減用基礎杭は、保護
層がポリウレタン樹脂に線膨張係数０．１ｘｌＱ−４／
”ｃ以下の無機充填剤を配合した配合物よりなるため、
硬化時の保護層の収縮が少なく、さらにＨ型鋼、■型鋼
のような形状基礎杭に対するすべり層保護にも好ましく
、さらに夏季保管時の保護層に凹凸が生しない、粘弾性
物質が軟化して保護層に変形、クランク、剥＾）ｔ、ふ
くれ等が生じない、負摩擦力に対して優れたすべり性能
を有する等、優れた特徴を有するものである。The foundation pile for reducing negative friction force obtained according to the present invention has a protective layer made of polyurethane resin with a linear expansion coefficient of 0.1xlQ-4/
``Because it is made of a compound containing an inorganic filler of C or less,
The protective layer has little shrinkage during hardening, and is also suitable for protecting the sliding layer for shaped foundation piles such as H-shaped steel and ■-shaped steel.Furthermore, the protective layer does not become uneven when stored in the summer, and the viscoelastic material softens. It has excellent features such as no deformation, cranking, peeling, blistering, etc. in the protective layer, and excellent sliding performance against negative frictional forces.
次に本発明を実施例と比較例により具体的に示すが、本
発明の範囲はこれらの実施例に限定されるものではない
。EXAMPLES Next, the present invention will be specifically illustrated by Examples and Comparative Examples, but the scope of the present invention is not limited to these Examples.
実施例
外形１０００ｆｌ、長さ６ｍの鋼管杭に、軟化点６０℃
、針入度１００のアスファルト系粘弾性物質を厚さ３１
１に均一塗布して、すべり層を形成させた後、さらに該
すべり層の外周面に、ポリウレタン樹脂に線膨張係数０
．１ ｘ １０−’／”ｃ以下の無機充填剤を配合した
配合物で保護層を形成させ杭を得た。Exception type 1000fl, 6m long steel pipe pile, softening point 60℃
, asphalt-based viscoelastic material with a penetration degree of 100 and a thickness of 31
1 is uniformly applied to form a slipping layer, and then a polyurethane resin with a coefficient of linear expansion of 0 is coated on the outer peripheral surface of the slipping layer.
．． A protective layer was formed using a compound containing an inorganic filler of 1 x 10-'/''c or less to obtain a pile.
得られた杭について各種試験を行った。結果を第１表に
示す。Various tests were conducted on the obtained piles. The results are shown in Table 1.
（以下余白）
屋外曝露後の被５１層表面について、実施例１〜４では
変化が認められなかった。(Hereinafter, blank space) No change was observed in Examples 1 to 4 on the surface of the 51 layer to be coated after outdoor exposure.
比１Ｆ２例１では雨の降った翌日に晴天になって鋼管温
度が上昇したため、被覆層表面においてふくれの発生が
認められた。In Example 1 of Ratio 1F2, the weather became clear the day after it rained and the temperature of the steel pipe increased, so blistering was observed on the surface of the coating layer.
比較例２では粘弾性物質の流動により被覆層表面に凹凸
の変形が認められた。In Comparative Example 2, uneven deformation was observed on the surface of the coating layer due to the flow of the viscoelastic substance.
比較例３では粘弾性物質の軟化流動とポリエチレンの残
留応力で表面凹凸の発生が認められた。In Comparative Example 3, surface unevenness was observed due to softening flow of the viscoelastic material and residual stress of the polyethylene.
打込み併抜き後の被覆層表面について、実施例および比
較例３では被５１層表面に微小なすり傷があるだけで、
被覆層の破れやめくれは認められなかった。Regarding the surface of the coating layer after driving and punching, in Example and Comparative Example 3, there were only minute scratches on the surface of the 51 coated layer.
No tearing or blistering of the coating layer was observed.
比較例１では、ふくれ発生部が打込み中に破れた。In Comparative Example 1, the blistering portion was torn during driving.
比較例２では打込み中および引抜き中に端部から保護層
のめくれが認められた。In Comparative Example 2, peeling of the protective layer from the edges was observed during driving and drawing.
第１図は本発明の負摩擦力軽減用基礎杭の一部断面図で
ある。
■は杭、２はすべり層、３は保護層である。FIG. 1 is a partial sectional view of the foundation pile for reducing negative frictional force of the present invention. ■ is a pile, 2 is a sliding layer, and 3 is a protective layer.
Claims (2)
させた後、さらに該すべり層の外周面に保護層を形成さ
せた負摩擦力軽減用基礎杭において、該保護層が、ポリ
ウレタン樹脂に線膨張係数０．１×１０＾−＾４／℃以
下の無機充填剤をポリウレタン樹脂に対して５〜２００
重量％配合したものであることを特徴とする負摩擦力軽
減用基礎杭。(1) A foundation pile for reducing negative friction in which a sliding layer made of a viscoelastic substance is formed on the outer peripheral surface of the pile, and then a protective layer is further formed on the outer peripheral surface of the sliding layer, in which the protective layer is made of polyurethane. Add an inorganic filler with a linear expansion coefficient of 0.1 x 10^-^4/℃ or less to the polyurethane resin.
A foundation pile for reducing negative friction force, characterized in that it contains % by weight.
たはミルドファイバーガラスである特許請求の範囲第１
項記載の負摩擦力軽減用基礎杭。(2) Claim 1, wherein the inorganic filler is chopped fiber glass or milled fiber glass.
Foundation pile for reducing negative friction force as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18231286A JPS6340015A (en) | 1986-08-01 | 1986-08-01 | Foundation pile for relieving negative frictional force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18231286A JPS6340015A (en) | 1986-08-01 | 1986-08-01 | Foundation pile for relieving negative frictional force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6340015A true JPS6340015A (en) | 1988-02-20 |
Family
ID=16116098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18231286A Pending JPS6340015A (en) | 1986-08-01 | 1986-08-01 | Foundation pile for relieving negative frictional force |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6340015A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH041230U (en) * | 1990-04-19 | 1992-01-08 | ||
| JP2020122306A (en) * | 2019-01-30 | 2020-08-13 | 旭化成建材株式会社 | Burying method of steel pile |
| JP2020122305A (en) * | 2019-01-30 | 2020-08-13 | 旭化成建材株式会社 | Steel pile for supporting land structure and land structure |
-
1986
- 1986-08-01 JP JP18231286A patent/JPS6340015A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH041230U (en) * | 1990-04-19 | 1992-01-08 | ||
| JP2020122306A (en) * | 2019-01-30 | 2020-08-13 | 旭化成建材株式会社 | Burying method of steel pile |
| JP2020122305A (en) * | 2019-01-30 | 2020-08-13 | 旭化成建材株式会社 | Steel pile for supporting land structure and land structure |
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