CAJ | 학술논문

为了研究胀限与变单向压力和初始含水率、三向膨胀率与变单向压力和初始含水率的关系，用“膨胀土三向胀缩测试仪”对广西宁明灰白重塑膨胀土进行了三向等压(27 kPa)的情况下变单向压力(27~164 kPa)的膨胀增湿试验。对试验数据进行拟合、对比分析得出：胀限可与变单向压力的对数进行线性拟合，胀限由三向压力决定，与初始含水率无关；无论水平向压力还是竖直向压力，均会抑制该向的膨胀变形，该向膨胀可与该向压力的对数进行一次线性拟合；三向中任一向加压都会同时促进另外两向膨胀变形，该向压力越大，对另外两向膨胀变形的促进作用越大；相同压力条件下，三向膨胀率均与初始含水率呈一次线性负相关；当竖直向压力为水平向压力的2倍时，各向膨胀率与初始含水率关系曲线基本重合。
위료연구창한여변단향압력화초시함수솔、삼향팽창솔여변단향압력화초시함수솔적관계，용“팽창토삼향창축측시의”대엄서저명회백중소팽창토진행료삼향등압(27 kPa)적정황하변단향압력(27~164 kPa)적팽창증습시험。대시험수거진행의합、대비분석득출：창한가여변단향압력적대수진행선성의합，창한유삼향압력결정，여초시함수솔무관；무론수평향압력환시수직향압력，균회억제해향적팽창변형，해향팽창가여해향압력적대수진행일차선성의합；삼향중임일향가압도회동시촉진령외량향팽창변형，해향압력월대，대령외량향팽창변형적촉진작용월대；상동압력조건하，삼향팽창솔균여초시함수솔정일차선성부상관；당수직향압력위수평향압력적2배시，각향팽창솔여초시함수솔관계곡선기본중합。
In order to investigate the influence of varying unidirectional pressure and initial water content on the expansion limit and the three-directional swelling ratio, a hygral expansion test for the remolded gray expansive soil from Ningming, Guangxi under varying unidirectional pressure (27~164 kPa) was performed in the condition of equal pressure (27 kPa) in the three directions using the “three-directional swelling shrinkage tester for expansive soil”. Some results are obtained by fit-ting and analyzing the experimental data. The results indicate that the expansion limit is determined by the three-directional pressure, which is irrelevant to the initial water content. The raising of pres-sure in either direction will promote the expansion deformation in other directions, and the expansion deformation can be fitted linearly with the logarithm of the varying unidirectional pressure. The grea-ter the pressure is, the more promotion to the expansion deformation in other two directions will be. Under the same pressure, the three-directional expansion-rate and initial water content was negative-ly related. When the vertical pressure becomes 2 times of the horizontal pressure, the relation curves between the expansion rate and initial water content basically coincides.