JP2819902B2 - Liquefaction prevention structure in foundation ground - Google Patents
Liquefaction prevention structure in foundation groundInfo
- Publication number
- JP2819902B2 JP2819902B2 JP3332928A JP33292891A JP2819902B2 JP 2819902 B2 JP2819902 B2 JP 2819902B2 JP 3332928 A JP3332928 A JP 3332928A JP 33292891 A JP33292891 A JP 33292891A JP 2819902 B2 JP2819902 B2 JP 2819902B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- water
- liquefaction
- swellable
- foundation ground
- 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
- 230000002265 prevention Effects 0.000 title claims description 8
- 239000000835 fiber Substances 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- 230000004888 barrier function Effects 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000010276 construction Methods 0.000 claims description 12
- 239000003792 electrolyte Substances 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims 1
- 230000008961 swelling Effects 0.000 description 14
- 239000000499 gel Substances 0.000 description 11
- 239000006185 dispersion Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229920002972 Acrylic fiber Polymers 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000001879 gelation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000003900 soil pollution Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- -1 Na Cl Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920000247 superabsorbent polymer Polymers 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、液状化しやすい地盤中
に注入材を注入し、地震時にも安全な基礎地盤を築造し
てその液状化を未然に防止するとともに、土壌汚染等の
環境に対する影響が少ない基礎地盤における液状化防止
構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for injecting an injectable material into a liquefiable ground to prevent the liquefaction of the ground by constructing a safe foundation ground even in the event of an earthquake, The present invention relates to a structure for preventing liquefaction in a foundation ground having little influence.
【０００２】[0002]
【従来の技術】埋立て造成された地盤等の液状化しやす
い地盤では、地震時に地盤内に発生する過剰間隙水圧の
上昇により地盤が液状化して、基礎地盤としての支持力
が失われる。2. Description of the Related Art In a ground which is liable to be liquefied, such as a buried ground, the ground is liquefied due to an increase in excess pore water pressure generated in the ground during an earthquake, and the bearing capacity as a foundation ground is lost.
【０００３】このような問題に対する地盤改良のための
対策としては、セメント系や化学薬液系等の注入材によ
る地盤注入工法や、地下連続壁による格子状遮断壁工法
などがあり、地盤の透水性を減少させたり、あるいは地
盤強度自体を向上させようとするものである。[0003] As a countermeasure for improving the ground against such a problem, there are a ground injection method using an injection material such as a cement system or a chemical solution, and a grid-shaped cut-off wall method using an underground continuous wall. Or to improve the ground strength itself.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記の
ような従来の注入材を注入する地盤注入工法にあって
は、透水係数の大きい液状化しやすい地盤中に注入材を
注入することとなり、注入材が散逸したり、固化する前
に地盤中の水で希釈されてしまって注入材が固結しない
など、前記した所期の地盤改良の目的が果たされないば
かりでなく、特に化学薬液を使用した場合には、充分に
固化したとしても、化学薬液中の成分が注入した地盤中
に溶出，残留して土壌汚染を引き起こす恐れがあるとい
う問題点があった。However, in the above-mentioned conventional ground injection method for injecting an injection material, the injection material is injected into the ground having a large water permeability and easily liquefied. Is dissipated, and before the solidification is diluted with the water in the ground and the injected material does not solidify, such as not only the intended purpose of the ground improvement described above is not fulfilled, especially using a chemical solution In such a case, there is a problem that even if the solidification is sufficient, the components in the chemical solution may elute and remain in the injected ground and cause soil contamination.
【０００５】さらに、地下連続壁による格子状遮断壁工
法にあっては、掘削機との関連上、壁厚が過剰とならざ
るをえず、施工コストが極めて高くなるという問題点も
あった。[0005] Further, in the grid-shaped barrier wall construction method using an underground continuous wall, there has been a problem that the wall thickness has to be excessive due to the relation with the excavator, and the construction cost is extremely high.
【０００６】本発明は前記問題点に鑑みてなされたもの
であって、その目的は、地盤中に注入材を注入して、確
実にかつ経済的にその液状化を未然に防止するととも
に、土壌汚染等の環境に対する影響が少ない基礎地盤に
おける液状化防止構造を提供することにある。The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to inject an injection material into the ground to reliably and economically prevent the liquefaction thereof and to prevent the liquefaction. It is an object of the present invention to provide a structure for preventing liquefaction in the foundation ground, which has less influence on the environment such as pollution.
【０００７】[0007]
【課題を解決するための手段】前記目的を達成するた
め、本発明は、基礎地盤の液状化を防止するための液状
化防止構造であって、液状化しやすい地盤内に水膨潤性
繊維を水に分散させた注入材を注入することを特徴とす
る。In order to achieve the above object, the present invention provides a method for preventing liquefaction of a foundation ground.
A liquefaction- preventing structure, characterized by injecting an injecting material in which water-swellable fibers are dispersed in water into the ground that is easily liquefied.
【０００８】また、基礎地盤の液状化を防止するための
液状化防止構造であって、液状化しやすい地盤内に水膨
潤性繊維を水に分散させた注入材を遮断壁造成用鋼材を
介して格子状に注入することを特徴とする。[0008] Further, in order to prevent liquefaction of the foundation ground,
A liquefaction-preventing structure, characterized in that an injecting material in which water-swellable fibers are dispersed in water is injected into the ground that easily liquefies in a grid pattern through a steel material for forming a barrier wall.
【０００９】このとき、前記注入材には電解質を添加す
ると望ましい。At this time, it is desirable to add an electrolyte to the injection material.
【００１０】[0010]
【作用】前記の構成によれば、注入材としての水膨潤性
繊維を水に分散させた繊維分散液は、従来の注入材と同
様に地盤中に注入されると、これに含まれる水膨潤性繊
維が地盤中の水分を吸水して膨潤ゲル化する。その結
果、地盤の土砂粒子間が前記膨潤ゲル化した水膨潤性繊
維で目詰めされるとともに、繊維同士が絡み合って散逸
することなく連結し、地盤が強化される。According to the above construction, when a fiber dispersion obtained by dispersing water-swellable fibers serving as an injection material in water is injected into the ground in the same manner as a conventional injection material, the water swelling contained therein is The conductive fibers absorb water in the ground and swell and gel. As a result, the soil particles in the ground are filled with the water-swellable fibers that have been swollen and gelled, and the fibers are entangled and connected without dissipating, thereby strengthening the ground.
【００１１】また、水膨潤性繊維を水に分散させた注入
材を遮断壁造成用鋼材を介して地盤中に注入するので、
注入材としての水膨潤性繊維の繊維分散液は、地盤中に
打設された遮断壁造成用鋼材が抜出された隙間に注入さ
れ、これに含まれる水膨潤性繊維は周辺地盤中の水分を
吸水して膨潤ゲル化し地盤や地下水の流動を遮断するた
め、遮断壁造成用鋼材と置き換えた後は遮断壁として機
能する。[0011] Further, since the injection material in which the water-swellable fibers are dispersed in water is injected into the ground through the steel material for forming the barrier wall,
The fiber dispersion of the water-swellable fiber as an injecting material is injected into the gap from which the steel material for forming the barrier wall, which has been cast into the ground, is extracted, and the water-swellable fiber contained therein is filled with water in the surrounding ground. After it is replaced with steel for forming the barrier wall, it functions as a barrier wall because it absorbs water and swells and gels to block the ground and groundwater flow.
【００１２】また、水膨潤性繊維の繊維分散液に添加す
る電解質の量を増減することにより、前記水膨潤性繊維
が膨潤ゲル化し始めるまでの時間、すなわち膨潤ゲルタ
イムを調整することができる。この場合、電解質の濃度
を増すほど膨潤ゲルタイムは長くなる。Further, by increasing or decreasing the amount of the electrolyte to be added to the fiber dispersion of the water-swellable fiber, the time until the water-swellable fiber starts to swell, that is, the swelling gel time can be adjusted. In this case, the swelling gel time becomes longer as the concentration of the electrolyte increases.
【００１３】さらに、前記水膨潤性繊維は、残留汚染の
原因となるような物質を溶出しないので、土壌汚染等の
環境汚染を引き起こす恐れが少ない。Further, since the water-swellable fibers do not elute substances that cause residual pollution, they are less likely to cause environmental pollution such as soil pollution.
【００１４】[0014]
【実施例】以下、本発明の好適実施例を添付図面を用い
て詳細に説明する。図１は、本発明に係る基礎地盤にお
ける液状化防止構造の施工状況を示す斜視図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a construction state of a liquefaction prevention structure in a foundation ground according to the present invention.
【００１５】地盤改良を必要とする地盤Ｅに対して、通
常の地盤注入工法にしたがって、注入管を必要に応じて
配置，貫入させる。[0015] Injection pipes are arranged and penetrated into the ground E, which requires ground improvement, as necessary according to a normal ground injection method.
【００１６】水膨潤性繊維を水に分散させた繊維分散液
である注入材は、１ショット注入方式等により、前記注
入管を介して前記地盤Ｅの所定の位置に注入される。An injection material, which is a fiber dispersion obtained by dispersing water-swellable fibers in water, is injected into a predetermined position of the ground E through the injection pipe by a one-shot injection method or the like.
【００１７】水膨潤性繊維としては、例えば特公昭５８
−１０５０８号公報に開示されているように、アクリル
繊維からなる芯部を構成する内層と、内層を囲うように
配設されている高吸水性で吸水後膨潤するように加工処
理された外層とからなる二重構造の水膨潤性繊維などが
採用される。As the water-swellable fiber, for example, Japanese Patent Publication No. Sho 58
As disclosed in JP-A-10508, an inner layer constituting a core portion made of an acrylic fiber, and an outer layer disposed so as to surround the inner layer and having been subjected to swelling after water absorption with high water absorption. For example, a water-swellable fiber having a double structure consisting of
【００１８】この水膨潤性繊維は、芯となるアクリル繊
維の持つ繊維としての機能と外層が持つ高吸水性ポリマ
ーとしての機能との二つを併せ持つ複合機能素材であ
り、通常状態では短繊維状をなし、吸水によりゲル化し
て膨潤する。なお、土壌汚染の原因となる残留成分は含
まれておらず、生物に対しても安全である。The water-swellable fiber is a composite functional material having both the function of the core acrylic fiber as a fiber and the function of the outer layer as a superabsorbent polymer. And swells by gelling due to water absorption. It does not contain residual components that cause soil contamination, and is safe for living organisms.
【００１９】前記の構成からなる繊維分散液が地盤Ｅ中
に注入されると、水膨潤性繊維が水分を吸引し始め、膨
潤ゲル化する。また、このとき、前記水膨潤性繊維に含
まれているアクリル繊維で形成された芯部が周囲の土砂
粒子に絡み付き、土砂粒子間を目詰めして止水性を発揮
し、一種の遮水層を形成すると同時に、繊維の膨潤ゲル
化による体積膨脹によって圧密効果をも生じて、止水効
果に優れた基礎地盤Ｅ1 が形成される。また、前記のよ
うに、繊維の芯部同士が強固に連結して、繊維が地盤Ｅ
中に散逸することも防止される。When the fiber dispersion having the above-described structure is injected into the ground E, the water-swellable fibers begin to absorb moisture and swell and gel. Further, at this time, the core formed of the acrylic fiber contained in the water-swellable fiber is entangled with surrounding earth and sand particles, clogging between the earth and sand particles to exhibit water-blocking properties, and is a kind of water-blocking layer. simultaneously makes a, also occurs consolidation effect by the volume expansion due to swelling gelation of the fiber, foundation ground E 1 having excellent water stopping effect is formed. Further, as described above, the cores of the fibers are firmly connected to each other, and
Dissipation inside is also prevented.
【００２０】地盤Ｅに注入される以前の水分との接触に
よる膨潤ゲル化を防止し、地盤Ｅの内部で膨潤ゲル化を
進行させるためには、膨潤ゲルタイムを調整するための
電解質を添加しておけばよい。In order to prevent swelling gelation due to contact with water before being injected into the ground E and to promote swelling gelation inside the ground E, an electrolyte for adjusting a swelling gel time is added by adding an electrolyte. It is good.
【００２１】電解質としては、ＫＯＨ，ＮａＯＨ，Ｎａ
Ｃｌ，Ｎａ2 ＳＯ4 などがあり、これらのうち最も入手
が容易で安価で安全な素材を添加すればよい。電解質の
存在下では、水膨潤性繊維の吸水機能が抑制されて膨潤
しない。そして、地盤Ｅ中に注入され、土中水分と接触
することで前述の電解質が希釈，消失して順次膨潤ゲル
化を生ずるので、注入量や注入範囲などの施工条件を勘
案してその添加量を定めればよい。As the electrolyte, KOH, NaOH, Na
Cl, Na 2 SO 4 and the like. Of these, the most easily available, inexpensive and safe material may be added. In the presence of the electrolyte, the water-swellable fiber does not swell due to its reduced water-absorbing function. Then, the electrolyte is injected into the ground E and comes into contact with moisture in the soil, so that the above-mentioned electrolyte is diluted and disappears, thereby causing swelling and gelling in sequence. Should be determined.
【００２２】図２，図３は、本発明に係る液状化防止構
造の他の実施例の施工状況を示す。まず、改良区域にバ
イブローハンマーなどを用いて数枚の遮断壁造成用鋼材
１を隣接して連続的にまた直線的に打ち込む。この遮断
壁造成用鋼材１には、あらかじめパイプ５が一体に取り
付けられ、後述する引抜時にこのパイプ５を通じて注入
材４が注入される構成としている。2 and 3 show the construction of another embodiment of the liquefaction prevention structure according to the present invention. First, several steel sheets 1 for forming a barrier wall are driven continuously and linearly into the improved area using a vibratory hammer or the like. A pipe 5 is integrally attached to the barrier wall forming steel material 1 in advance, and an injection material 4 is injected through the pipe 5 at the time of drawing described later.
【００２３】次に、最初に打設された遮断壁造成用鋼材
２を引抜きながら、遮断壁造成用鋼材２の下端に生じる
空隙ｄにパイプ５を通じて貯留タンク６から送液ポンプ
７を介して注入材４を注入，充填する。引抜かれた遮断
壁造成用鋼材２は、最後に打設された遮断壁造成用鋼材
２の次に転用，打設される。この工程を反復して施工す
ることによって、連続遮断壁８が造成される。この遮断
壁８の厚さは１０ｃｍ程度であって、従来の地中連続壁
と比較してかなり薄いものである。Next, while pulling out the steel material 2 for constructing the barrier wall which has been cast first, it is injected from the storage tank 6 through the liquid supply pump 7 into the gap d formed at the lower end of the steel material 2 for construction of the barrier wall. Material 4 is injected and filled. The drawn-out barrier wall forming steel material 2 is diverted and driven next to the lastly mounted barrier wall forming steel material 2. By repeating this step, the continuous blocking wall 8 is formed. The thickness of the blocking wall 8 is about 10 cm, which is considerably thinner than a conventional underground continuous wall.
【００２４】本実施例にあっては、図２に示すように、
前記遮断壁８を互いに直交する複数の遮断壁８，８，…
によって形成される格子状に設けたので、一つの格子に
包囲される地盤は他の隣接する地盤と遮断壁８によって
縁切りされており、相互の地盤や地下水の流動の影響を
受けない基礎地盤Ｅ1 が形成される。In this embodiment, as shown in FIG.
A plurality of blocking walls 8, 8,.
The ground surrounded by one grid is cut off by the barrier wall 8 with the other adjacent ground, and the foundation ground E which is not affected by the mutual ground and the flow of groundwater. 1 is formed.
【００２５】本実施例に採用される水膨潤性繊維および
膨潤ゲル化調整用の電解質に関しては、前記第１実施例
で述べたのと同様である。The water-swellable fibers and the electrolyte for adjusting the swelling gelling employed in this embodiment are the same as those described in the first embodiment.
【００２６】なお、本実施例では、前記遮断壁造成用鋼
材２を格子状に配設したが、構造物の基礎部の形状や用
途、前記地盤Ｅの強度等に応じて適宜設計上の配慮に基
づいた配置（ハニカム状等）を採り得ることはいうまで
もない。In this embodiment, the steel material 2 for forming the barrier wall is arranged in a lattice shape. However, design considerations are appropriately made in accordance with the shape and use of the foundation of the structure, the strength of the ground E, and the like. It is needless to say that an arrangement (honeycomb shape or the like) based on the above can be adopted.
【００２７】[0027]
【発明の効果】以上実施例によって詳細に説明したよう
に、本発明に係る基礎地盤における液状化防止構造によ
れば、次の優れた効果を発揮する。As explained in detail in the above embodiments, the structure for preventing liquefaction in the foundation ground according to the present invention exhibits the following excellent effects.
【００２８】（１）注入材としての水膨潤性繊維を水に
分散させた繊維分散液は、従来の注入材と同様に液状化
しやすい地盤中に注入されると、地盤中の水分を吸水し
て膨潤ゲル化する。その結果、地盤の土砂粒子間が前記
膨潤ゲル化した水膨潤性繊維で目詰めされるとともに、
繊維同士が絡み合って散逸することなく強固に連結し
て、地盤の液状化が防止される。すなわち、注入材とし
ての水膨潤性繊維を水に分散させた繊維分散液は、液状
化しやすい地盤中に注入されると、水膨潤性繊維が地盤
中の水分を吸収して膨潤ゲル化し、これの芯部が周囲の
土粒子に絡み付いて、地盤の土粒子間が前記膨潤ゲル化
した水膨潤性繊維で目詰めされるとともに、膨潤ゲル化
する際に周囲の地盤の水分を積極的に捕足して体積膨張
による圧密効果も生じ、また繊維同士が絡み合って散逸
することなく強固に連結して、地盤の液状化が効果的に
防止される。 (1) A fiber dispersion obtained by dispersing water-swellable fibers as water as an injecting material into water, which is easily liquefied as in a conventional injecting material, absorbs water in the ground. To swell and gel. As a result, between the soil particles of the ground is clogged with the swellable gelled water swellable fibers,
The fibers are firmly connected without being entangled and dissipated, and liquefaction of the ground is prevented. In other words,
The fiber dispersion obtained by dispersing all the water-swellable fibers in water is liquid
Water swellable fibers are injected into the soil
It absorbs the water inside and swells and gels, and the core of this
Entangled with soil particles, the swelling gel between the soil particles on the ground
With water-swellable fibers and gelled swelling
Volumetric expansion by actively capturing moisture in the surrounding ground when
Causes a consolidation effect, and the fibers are entangled and dissipated
Liquefaction of the ground
Is prevented.
【００２９】（２）水膨潤性繊維を水に分散させた注入
材を遮断壁造成用鋼材を介して地盤中に注入するので、
注入材としての水膨潤性繊維の繊維分散液は、地盤中に
打設された遮断壁造成用鋼材が抜出された隙間に注入さ
れ、これに含まれる水膨潤性繊維は周辺地盤中の水分を
吸水して膨潤ゲル化し地盤や地下水の流動を遮断するた
め、遮断壁造成用鋼材と置き換えた後は遮断壁として機
能し、それぞれの遮断壁によって包囲される地盤同士を
縁切りして、地盤を強化し、液状化が防止される。(2) Since the injection material in which the water-swellable fiber is dispersed in water is injected into the ground through the steel material for forming the barrier wall,
The fiber dispersion of the water-swellable fiber as an injecting material is injected into the gap from which the steel material for forming the barrier wall, which has been cast into the ground, is extracted, and the water-swellable fiber contained therein is filled with water in the surrounding ground. After replacing the steel with a wall-forming steel material, it functions as a blocking wall, and cuts the ground surrounded by each blocking wall to cut off the ground. Strengthens and prevents liquefaction.
【００３０】（３）水膨潤性繊維の繊維分散液に添加す
る電解質の量を増減することにより、前記水膨潤性繊維
が膨潤ゲル化し始めるまでの時間、すなわち膨潤ゲルタ
イムを調整することができるので、施工規模に応じた膨
潤ゲルタイムを容易に設定できる。(3) By increasing or decreasing the amount of the electrolyte added to the fiber dispersion of the water-swellable fiber, the time until the water-swellable fiber starts to swell, that is, the swelling gel time can be adjusted. In addition, the swelling gel time according to the construction scale can be easily set.
【００３１】（４）水膨潤性繊維は残留汚染の原因とな
るような物質を溶出しないので、土壌汚染等の環境汚染
を引き起こす恐れが少ない。(4) Since the water-swellable fibers do not elute substances that cause residual pollution, they are less likely to cause environmental pollution such as soil pollution.
【図１】本発明に係る基礎地盤における液状化防止構造
の一実施例の施工状況を示す斜視図である。FIG. 1 is a perspective view showing a construction state of an embodiment of a liquefaction prevention structure in a foundation ground according to the present invention.
【図２】本発明に係る基礎地盤における液状化防止構造
の他の実施例の施工状況を示す斜視図である。FIG. 2 is a perspective view showing the construction state of another embodiment of the liquefaction prevention structure in the foundation ground according to the present invention.
【図３】同上施工断面図である。[Fig. 3] Fig. 3 is a sectional view of the construction.
１，５ 注入管 ２ 遮断壁造成用鋼材 Ｅ 地盤 Ｅ1 基礎地盤1,5 Injection pipe 2 Steel for construction of barrier wall E Ground E 1 Foundation ground
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−142119（ＪＰ，Ａ) 特開 平３−244711（ＪＰ，Ａ) 特公 昭58−10508（ＪＰ，Ｂ２) 増田房義著 「高分子新素材ＯｎｅＰ ｏｉｎｔ４ 高吸収性ポリマー」 第１ 版，共立出版，昭和62年11月15日発行, Ｐ．22−23 (58)調査した分野(Int.Cl.6，ＤＢ名) E02D 3/12 E02D 19/16────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-142119 (JP, A) JP-A-3-244711 (JP, A) JP-B-58-10508 (JP, B2) Fusayoshi Masuda “ New Polymer OnePoint 4 High Absorbent Polymer, 1st Edition, Kyoritsu Shuppan, published November 15, 1987, 22-23 (58) Field surveyed (Int. Cl. 6 , DB name) E02D 3/12 E02D 19/16
Claims (3)
化防止構造であって、液状化しやすい地盤内に水膨潤性
繊維を水に分散させた注入材を注入することを特徴とす
る基礎地盤における液状化防止構造。1. Liquid for preventing liquefaction of foundation ground
Prevention structure in a liquefaction prevention structure in the foundation ground, characterized in that injecting an injection material swellable fibers dispersed in water to liquefy easily in soil.
化防止構造であって、液状化しやすい地盤内に水膨潤性
繊維を水に分散させた注入材を遮断壁造成用鋼材を介し
て格子状に注入することを特徴とする基礎地盤における
液状化防止構造。2. A liquid for preventing liquefaction of the foundation ground.
A liquefaction prevention structure for a foundation ground, characterized by injecting a filler material in which water-swellable fibers are dispersed in water into a liquefiable ground in a grid-like manner through a steel material for forming a barrier wall. Construction.
徴とする請求項１または２に記載の基礎地盤における液
状化防止構造。3. The structure for preventing liquefaction in a foundation ground according to claim 1, wherein an electrolyte is added to the injection material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3332928A JP2819902B2 (en) | 1991-11-22 | 1991-11-22 | Liquefaction prevention structure in foundation ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3332928A JP2819902B2 (en) | 1991-11-22 | 1991-11-22 | Liquefaction prevention structure in foundation ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05140926A JPH05140926A (en) | 1993-06-08 |
| JP2819902B2 true JP2819902B2 (en) | 1998-11-05 |
Family
ID=18260384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3332928A Expired - Fee Related JP2819902B2 (en) | 1991-11-22 | 1991-11-22 | Liquefaction prevention structure in foundation ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2819902B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6925834B2 (en) * | 2017-03-27 | 2021-08-25 | 学校法人早稲田大学 | Ground freezing method |
| JP7112242B2 (en) * | 2018-05-02 | 2022-08-03 | 学校法人早稲田大学 | Impermeability and Permeability Restoration Method in the Ground |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA824754B (en) * | 1981-07-04 | 1984-02-29 | Sandoz Ltd | Organic compounds |
| JPH0739656B2 (en) * | 1990-02-23 | 1995-05-01 | 株式会社大林組 | Method of preventing ground subsidence by pulling out soil retaining members |
-
1991
- 1991-11-22 JP JP3332928A patent/JP2819902B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 増田房義著 「高分子新素材ＯｎｅＰｏｉｎｔ４ 高吸収性ポリマー」 第１版，共立出版，昭和６２年１１月１５日発行，Ｐ．２２−２３ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05140926A (en) | 1993-06-08 |
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