KR860002141B1 - Method for reinforcing weaken grounds - Google Patents
Method for reinforcing weaken grounds Download PDFInfo
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- KR860002141B1 KR860002141B1 KR1019840008557A KR840008557A KR860002141B1 KR 860002141 B1 KR860002141 B1 KR 860002141B1 KR 1019840008557 A KR1019840008557 A KR 1019840008557A KR 840008557 A KR840008557 A KR 840008557A KR 860002141 B1 KR860002141 B1 KR 860002141B1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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Abstract
Description
본 발명은 토양 지반경화처리에 관한 것으로서, 더욱 상세하게는 도로의 로상, 로반공 등의 시공과 같은 토양 지반경화처리에 있어서 스테아르산염, 수산화나트륨, 실리카 및 트리폴리인산염의 혼합물을 토양안정제로 사용함으로써 물의 침투에 의한 강도의 저하를 방지하고 향상된 지지력을 유지시키는 개선된 지반경화안정처리공법에 관한 것이다.The present invention relates to soil ground hardening treatment, and more particularly, by using a mixture of stearate, sodium hydroxide, silica and tripolyphosphate as soil stabilizer in soil ground hardening treatment such as road furnace, rovan hole construction and the like. The present invention relates to an improved ground hardening treatment method which prevents the decrease in strength due to the penetration of water and maintains the improved bearing capacity.
종래에 있어서는 토양에 조입제를 사용하거나 시멘트를 보강충전제로 사용하여 지방경화처리를 하였으나, 방수성이 거의없고 토양 입자가 원래의 상태 그대로 혼입된 상태이므로 시공후 안정성이 없으며, 기온의 차이에 의해 균열이 발생되거나 특히 동절기에는 동해가 심한 등의 결점이 있었다.In the past, fat curing was carried out by using an additive in the soil or cement as a reinforcing filler. However, since there is almost no waterproofness and the soil particles are mixed as they are, there is no stability after construction. Or defects such as severe East Sea during the winter season.
점토질, 점토성 사질, 특히 유기질, 이토질 등의 미립자 토양의 경우에는, 그 자체가 물을 많이 흡수한 상태이므로 안정된 지반을 형성시키기에 상당한 어려움이 있었다.In the case of particulate soils such as clay, clay sand, and especially organic and soil soils, since they themselves have absorbed a lot of water, there have been considerable difficulties in forming stable ground.
본 발명은 상기와 같은 종래 공법의 단점을 제거하고 토양의 응결을 단시간내에 촉진시킴으로써 신속한 지반안정화를 꾀하며, 압축강도가 크고 동해가 거의 없는 안정지반을 조성하고, 미립자 실트질, 유기질, 점토질 특히 이토질과 같은 연약토양에도 안정처리가 가능한 지반경화 안정처리공법을 제공하고자 함을 목적으로 한다.The present invention seeks to stabilize the ground quickly by eliminating the disadvantages of the conventional method as described above and to promote the condensation of the soil within a short time, and to form a stable ground with a large compressive strength and hardly any sea damage, and fine particles silt, organic matter, clay quality The purpose of this study is to provide a ground hardening stable treatment method that can be stabilized even on soft soil such as quality.
본 발명의 공법을 상술하면 하기와 같다.The method of the present invention will be described in detail below.
즉, 지반조성의 안정화를 위하여 토양에 대한 보강충전제로서 시멘트와 14∼16%의 산화규소, 5∼6%의 산화철, 51∼53%의 산화칼슘, 10∼11%의 산화알미늄, 5∼6%의 황산 5∼6%의 산화마그네슘, 1∼1.6%의 리그닌 슬폰산염(lignin sulfonate)의 조성물을 사용하여 지반경화 안정처리를 시공함에 있어서, 상기 조성물(분말형태)에 0.5∼1.2%의 스테아르산염, 0.4∼1.1%의 수산화나트륨 1.1∼2.4%의 실리카와 트리폴리인산염을 더욱 첨가한 토양안정조성물 3∼5중량%(시멘트중량 기준)을 시멘트에 혼합하고, 토양의 함수량을 조절한 후, 토양에 혼합하고 가압 고결시킨다. 시공후 고결효력을 충분히 나타내도록 하기 위해서 기온은 약 5∼40℃가 바람직하며, 0℃ 이하에서는 효과가 저하되므로 유의하여야 한다, 본 발명의 조성물은 함수량이 다량일 때에는 처리할 토양에 대한 혼합비를 증가시켜 혼합교반하여 자연상태로 방치하여 고화되도록 하며, 수중의 지반처리에 있어서도 상기와 같은 고화방법을 사용하여 고결시킨다.In other words, cement and 14 to 16% silicon oxide, 5 to 6% iron oxide, 51 to 53% calcium oxide, 10 to 11% aluminum oxide, 5 to 6 0.5 to 1.2% of stearic acid in the composition (powder form) when the ground hardening treatment is performed using a composition of 5% to 6% of sulfuric acid, 5% to 6% magnesium oxide, and 1% to 1.6% lignin sulfonate. Soil, 3 to 5% by weight (based on cement weight) of soil stabilizer added with 0.4 to 1.1% sodium hydroxide and 1.1 to 2.4% silica and tripolyphosphate were added to the cement, and the soil water content was adjusted. Mix and press solidify. The temperature is preferably about 5 to 40 ℃ in order to sufficiently exhibit high fixing effect after construction, it should be noted that the effect is lowered below 0 ℃, the composition of the present invention when the water content is a large amount of mixing ratio to the soil to be treated The mixture is stirred to be left in a natural state by mixing and solidified. In the ground treatment in water, it is solidified using the same solidification method as described above.
한편, 본 조성물에 있어서, 리그닌 술폰산염은 시멘트입자를 흡착막으로 둘러싸서 소수성으로 만듦으로써 응집성을 강화시켜 점토 등의 미립자를 응집시키는 것이며, 스테아르산염은 일정시간이 지나면 급격히 강도를 증가시켜 고결시키는 역할을 하고, 실리카는 시멘트립자와 토양입자간의 상호 흡착을 증대시켜 안정화 경화를 가능하게 한다. 또한, 트리폴리산염은 응집상태의 자연토에 분산효과를 강화시키므로 자연토중에 본 조성물을 균일하게 분산시켜 응결고화시키는 효과가 있고, 수산화나트륨은 경화를 가일층 촉진시킴으로써 리그닌 술폰산염 등에 의한 지연효과를 보완시켜 준다.On the other hand, in the present composition, lignin sulfonate encapsulates the cement particles in an adsorbent membrane to make them hydrophobic to enhance cohesion and to agglomerate fine particles such as clay, and stearate rapidly increases strength and solidifies after a certain time. In addition, silica increases the mutual adsorption between the cement particles and the soil particles, thereby enabling stable curing. In addition, since the tripolylate enhances the dispersing effect on the natural soil in agglomerated state, it has the effect of uniformly dispersing the composition in the natural soil to solidify it, and sodium hydroxide further promotes hardening to compensate for the delay effect by lignin sulfonate. Let it be.
본 발명의 조성물은 시멘트입자의 표면을 활성화시켜 강력히 기포를 발생시키고, 흙의 미세입자(0.001mm이하)를 흡착하여 응결을 강화시키며, 수화반응이 진행됨에 따라 표면적이 약 1,000배 이상 증가하여 지반내에 골고루 분포된다.The composition of the present invention activates the surface of the cement particles to generate bubbles strongly, adsorb fine particles of soil (0.001mm or less) to strengthen the condensation, and as the hydration reaction proceeds the surface area increases by about 1,000 times or more Evenly distributed within.
지반경화에 있어서 본 조성물을 사용함으로써 초기 응결은 신속히 달성되고 완전한 고결은 서서히 이루어져 개선된 강도를 유지할 수 있는데, 이는 전술한 스테아르산염의 특성으로 부터 유도되는 장점이다.By using this composition in ground hardening, initial condensation can be achieved quickly and complete solidification can be achieved slowly to maintain improved strength, which is an advantage derived from the properties of the stearates described above.
또한, 시멘트의 경우에는 습윤 양생을 시키기 위해 증발을 방지할 필요가 있으나, 본 시공법에 있어서는 보수성(保水性)이 높은 성분의 함유로 인하여 공기와 접촉되어도 무방하다. 따라서, 응결 경화작용의 특성에 있어서 본 발명에 의하면 응결시에 종래의 시멘트에서와 같은 수축 또는 균열이 발생하지 않으며, 건조밀도가 높기 때문에 동결 및 해빙 등의 기상조건에 대한 내성(耐性)이 강하여 동절기에 동해를 방지할 수 있고, 수축현상이 거의 없는 안정성과 방수성을 가질 뿐만 아니라, 0.001mm 이하의 유기질, 이토질의 미립자토질도 용이하게 고화시킬 수 있으며, 또한 함수량이 많은 토질의 경우에도 경화가 가능하므로 수중의 이토질 및 기타 함수량이 큰 토질의 경우에는 함수량을 측정하여 그에 따라 혼합비를 증가하여 수중교반하여 침전시키면 충분한 고화효과를 나타낸다. 기온은 5℃ 이상, 바람직하게는 5∼40℃를 준수하여야 하는데, 0℃이하에서는 토질경화가 지연되므로 고화공법을 고려하여야 하기 때문이다. 즉, 본 발명은 0℃이하인 경우 이외에는 어떠한 토질에도 적용할 수 있는 장점을 가지고 있다.In addition, in the case of cement, it is necessary to prevent evaporation in order to achieve wet curing, but in this construction method, it may be in contact with air due to the inclusion of a high water retention component. Therefore, in the characteristics of the condensation hardening effect, according to the present invention, condensation or cracking does not occur at the time of condensation, and since the dry density is high, it is resistant to weather conditions such as freezing and thawing. It can prevent the winter sea in winter, have stability and waterproofness with almost no shrinkage phenomenon, and can easily solidify organic and soil fine particles of less than 0.001mm, and harden even in soils with high water content. Therefore, in the case of soils with high soil content and other water contents, the water content is measured and the mixing ratio is increased accordingly, and the mixture is stirred in water to give sufficient solidification effect. The air temperature should comply with more than 5 ℃, preferably 5 ~ 40 ℃, because the soil curing is delayed below 0 ℃ because the solidification method should be considered. That is, the present invention has an advantage that can be applied to any soil except the case below 0 ℃.
이하, 본 발명의 효과를 실시예에 의해 구체적으로 설명하기로 한다.Hereinafter, the effects of the present invention will be described in detail by way of examples.
[실시예]EXAMPLE
지반조성을 위하여 토양에 보강충전제로서 시멘트를 사용하여 지반경화처리를 시공함에 있어서, 144g의 시멘트에 4.32g의 상술한 본 발명의 토양안정조성물을 혼합한 후, 토양의 함수량을 조절하고, 토양 1,800g에 혼합하여 가압, 고결시켜서 강연성의 두께 15㎝의 지반(로반) 1㎥를 형성시켰다.In the construction of the ground hardening treatment using cement as a reinforcing filler in soil for soil composition, after mixing 4.32 g of the soil stabilizer composition of the present invention described above with 144 g of cement, the water content of the soil is adjusted, and the soil 1,800 g. 1 m 3 of ground (roban) with a thickness of 15 cm was formed.
상기와 같이 처리한 본 발명의 시공법에 따른 지반과 종래의 시공법에 따른 지반을 비교한 결과를 표 1에 요약하였다.Table 1 summarizes the results of comparing the ground according to the construction method of the present invention treated as described above with the ground according to the conventional construction method.
[표 1]TABLE 1
표 1로 부터 알 수 있둣이, 본 발명의 공법에 의해 처리한 토양의 압축강도는 종래의 경우에 비하여 약 2배 이상임을 알 수 있다.As can be seen from Table 1, it can be seen that the compressive strength of the soil treated by the method of the present invention is about 2 times or more as compared with the conventional case.
또한, 본 발명의 공법, 종래의 소일시멘트 공법 및 종래의 콘크리트 공법에 의하여 처리 가능한 토양의 범위를 비교하여 도표화하면 표 2와 같다(표중의 빗금부분은 처리가능한 범위를 나타낸다).In addition, it is shown in Table 2 by comparing the range of the soil that can be treated by the method of the present invention, the conventional soil cement method and the conventional concrete method (the hatched portion in the table indicates the range that can be treated).
상기 도표로 부터 알 수 있듯이, 본 공법은 콘크리트나 소일시멘트 공법으로는 처리가 거의 불가능한 입경 0 001mm 이하의 실트, 점토 및 유기질 토양의 안정처리에도 적용될 수 있다.As can be seen from the above diagram, the present method can be applied to the stable treatment of silt, clay and organic soils with particle diameters of 0 001 mm or less, which are almost impossible to be treated by concrete or soil cement methods.
상술한 바와 같은 본 공법의 장점을 종합하면 다음과 같다.The advantages of the present method as described above are summarized as follows.
첫째, 현지 반토의 사용이 가능하므로 시공이 용이하고 경제적이다.First, construction is easy and economical because local alumina can be used.
둘째, 양생이 거의 필요하지 않고 방수성이 우수하다.Secondly, curing is hardly needed and the waterproofness is excellent.
세째, 압축강도가 극히 우수한 안정성 지반을 형성시킨다.Third, it forms a stable ground with extremely high compressive strength.
네째, 수축 균열이 거의 발생하지 않는다.Fourth, shrinkage cracking hardly occurs.
다섯째, 실트, 점토, 유기질 토양과 같은 미립자 토양의 연약지반도 처리 가능하다.Fifth, soft soils of particulate soil such as silt, clay and organic soils can be treated.
여섯째, 5℃ 이상의 기온에서는 어떠한 토질도 고화를 촉진한다.Sixth, at temperatures above 5 ° C, any soil promotes solidification.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2006075862A1 (en) * | 2005-01-12 | 2006-07-20 | Sung Ryong Ko | Method of construction for stabilization of ground |
KR101341103B1 (en) * | 2011-12-06 | 2013-12-12 | 이창훈 | Composition for Ground Hardening And Ground Mortar Including the Same |
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KR100298758B1 (en) * | 1998-10-26 | 2001-09-06 | 고준영 | A method for hardening at reclaiming wastes |
KR100436120B1 (en) * | 2001-12-05 | 2004-06-14 | 유성권 | High speed hardening cement composition |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2006075862A1 (en) * | 2005-01-12 | 2006-07-20 | Sung Ryong Ko | Method of construction for stabilization of ground |
KR101341103B1 (en) * | 2011-12-06 | 2013-12-12 | 이창훈 | Composition for Ground Hardening And Ground Mortar Including the Same |
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