CAJ | 학술논문

黄土的湿陷性是其重要的工程特性，常用一维压缩应力条件下的湿陷系数、自重湿陷系数和湿陷起始压力等指标定量评价。影响黄土湿陷性的因素较多，包括土的粒度、密度、湿度等基本物理性质指标，且各因素之间并非完全独立，存在一定相关性。采用因子分析法，通过对西安地铁4号线黄土高台地和宝鸡-兰州高速铁路隧道黄土塬湿陷性黄土场地地层物性质指标的统计分析和相关性分析，首先确定了相对独立的含水比（含水率与液限之比）和孔隙比3个物性指标反映的两个因子。然后，依据湿陷性黄土场地的试验资料，通过多元线性回归分析，分别得到了两个场地黄土的自重湿陷系数、湿陷起始压力以及压缩模量与含水比和孔隙比之间的相关关系。最后，比较分析了两个场地黄土自重湿陷系数、湿陷起始压力和压缩模量计算值与实测值，验证了利用因子分析法寻找影响黄土湿陷性的独立因子，建立黄土湿陷性参数与独立影响因子之间相关关系的合理性和准确性。针对两个地区两类地貌单元湿陷性黄土场地，建立的黄土湿陷性参数的相关关系具有快速、准确的评价黄土湿陷性和黄土地基湿陷变形的实际意义。
황토적습함성시기중요적공정특성，상용일유압축응력조건하적습함계수、자중습함계수화습함기시압력등지표정량평개。영향황토습함성적인소교다，포괄토적립도、밀도、습도등기본물이성질지표，차각인소지간병비완전독립，존재일정상관성。채용인자분석법，통과대서안지철4호선황토고태지화보계-란주고속철로수도황토원습함성황토장지지층물성질지표적통계분석화상관성분석，수선학정료상대독립적함수비（함수솔여액한지비）화공극비3개물성지표반영적량개인자。연후，의거습함성황토장지적시험자료，통과다원선성회귀분석，분별득도료량개장지황토적자중습함계수、습함기시압력이급압축모량여함수비화공극비지간적상관관계。최후，비교분석료량개장지황토자중습함계수、습함기시압력화압축모량계산치여실측치，험증료이용인자분석법심조영향황토습함성적독립인자，건립황토습함성삼수여독립영향인자지간상관관계적합이성화준학성。침대량개지구량류지모단원습함성황토장지，건립적황토습함성삼수적상관관계구유쾌속、준학적평개황토습함성화황토지기습함변형적실제의의。
Collapsibility is an important engineering characteristic of loess, which is indicated by the collapsibility coefficients, dead weight collapsibility coefficients and the initial collapse pressure under the condition of one-dimensional compression stress. There are many influencing factors of collapsible deformation characteristics such as grain size, density and moisture of soil. There is a certain correlation between the influencing factors which are not completely independent. Based on the physical indices statistical analysis and correlation analysis on the collapsible loess fields of loess high platform of Xi'an metro line No.4 and loess tableland of high-speed railway tunnel from Baoji to Lanzhou, the ratio of water content to the liquid limit, and the void ratio are determined to be the factors by the factor analysis method. The multiple linear regression analysis method is used to obtain the relationship between the dead weight collapsibility coefficients, the initial collapse pressure, the modulus of compressibility and the factors according to the test data of two collapsible loess fields. The deviation tests of calculated value and the measured value of the dead weight collapsibility coefficients, the initial collapse pressure and the modulus of compressibility are carried out. The rationality and the accuracy of determining the factors and establishing the relationship between the collapsible parameters and the independent influence factors are verified by the factor analysis method. The valuable significance of the rapid and accurate evaluation of collapsibility and the collapsible deformation of loess foundation is proved by setting up the correlativity of the collapsible parameters of loess in two types of topographic feature of two loess regions.