Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental Study on Ionic Soil Stabilizer Keeping the Hole Diameter of Clay Stratum in HDD
In Horizontal Directional Drilling (HDD), the hole diameter of clay stratum usually shrinks because of the swell or expansion of the montmorillonite, the kaolin and the illite. In order to control the swelling or expansive phenomenon which leads to the shrinkage hole during drilling in the clay stratum, a new kind of Ionic Soil Stabilizer(ISS) was used to treat the clay slurry and the expensive soils on the wall of hole. The Atterberg limits test, the shrinkage test, the free swell test, the zeta potential and the cation-exchange capacity test of the clay before and after treatment with ISS were carried out. The results show that the plastic index lowers, the shrinkage limit reduces, the free swell falls, the zeta potential and cation-exchange capacity decrease in the clay after treatment by the ISS. The mechanism is that the clay soil is treated by the ISS, which can replace the exchangeable cation of clay particle surface, change the structure of pair-electricity layers of clay particle surface, decrease the thickness of adsorbed water, reduce the cation-exchange capacity, and transfer the hydrophilic clay soil to the hydrophobic by the function of physics and chemistry so as to reduce the shrinkage hole in the clay stratum.
Experimental Study on Ionic Soil Stabilizer Keeping the Hole Diameter of Clay Stratum in HDD
In Horizontal Directional Drilling (HDD), the hole diameter of clay stratum usually shrinks because of the swell or expansion of the montmorillonite, the kaolin and the illite. In order to control the swelling or expansive phenomenon which leads to the shrinkage hole during drilling in the clay stratum, a new kind of Ionic Soil Stabilizer(ISS) was used to treat the clay slurry and the expensive soils on the wall of hole. The Atterberg limits test, the shrinkage test, the free swell test, the zeta potential and the cation-exchange capacity test of the clay before and after treatment with ISS were carried out. The results show that the plastic index lowers, the shrinkage limit reduces, the free swell falls, the zeta potential and cation-exchange capacity decrease in the clay after treatment by the ISS. The mechanism is that the clay soil is treated by the ISS, which can replace the exchangeable cation of clay particle surface, change the structure of pair-electricity layers of clay particle surface, decrease the thickness of adsorbed water, reduce the cation-exchange capacity, and transfer the hydrophilic clay soil to the hydrophobic by the function of physics and chemistry so as to reduce the shrinkage hole in the clay stratum.
Experimental Study on Ionic Soil Stabilizer Keeping the Hole Diameter of Clay Stratum in HDD
Cui, D. S. (Autor:in) / Xiang, W. (Autor:in) / Chen, Q. (Autor:in)
International Conference on Pipelines and Trenchless Technology 2011 ; 2011 ; Beijing, China
ICPTT 2011 ; 725-732
07.10.2011
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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