CAJ | 학술논문

以南水北调中线工程淅川段的膨胀土为研究对象，分别采用水泥和石灰对膨胀土进行改良，其掺量分别为2％、4％和6％，在分别养护7 d和28 d条件下，进行直剪试验，研究水泥和石灰掺量对改良膨胀土抗剪强度的影响。研究表明：水泥和石灰均能有效地抑制膨胀土的膨胀性，并且随着掺量的提高、养护时间的加长，改性膨胀土的抗剪强度、黏聚力和摩擦角进一步得到提高；水泥相对于石灰对膨胀土抗剪强度影响更大。
이남수북조중선공정석천단적팽창토위연구대상，분별채용수니화석회대팽창토진행개량，기참량분별위2％、4％화6％，재분별양호7 d화28 d조건하，진행직전시험，연구수니화석회참량대개량팽창토항전강도적영향。연구표명：수니화석회균능유효지억제팽창토적팽창성，병차수착참량적제고、양호시간적가장，개성팽창토적항전강도、점취력화마찰각진일보득도제고；수니상대우석회대팽창토항전강도영향경대。
Taking the expansive soil from the Middle Route of South-to-North Water Transfer Project in Xichuan section of Henan Prov-ince as a research object,it used cement and lime to improve the expansive soil respectively and studied the change law of shear strength. It also studied on the improved expansive soil through direct shear test under the conditions of curing 7 d and 28 d with addition amounts 2%, 4% and 6% of cement and lime respectively. The study shows that cement and lime can restrain the expansion of expansive soil effectively, and with the increase of amount of adding amounts and the curing time,the shear strength,the cohesion c and friction angle φ of the im-proved expansive soil are improved. Under the same condition,the cement has more influence relatively on expansive soil shear strength.