CAJ | 학술논문

针对合肥肥东地区非饱和地基土，利用非饱和土固结仪进行控制基质吸力和初始含水率的蠕变试验。研究结果表明：不同基质吸力条件下，非饱和土的变形随时间的变化大致可以分为2个阶段，同时基质吸力的存在对土体具有一定的硬化作用；含水率的增加会同时引起回弹变形和压缩变形，对于研究区的非饱和地基土，其回弹变形大于压缩变形；在不同初始含水率和不同竖向应力作用下，研究区非饱和地基土的蠕变变性特性很小，且24 h 等时线都可以近似用3个直线段表达。
침대합비비동지구비포화지기토，이용비포화토고결의진행공제기질흡력화초시함수솔적연변시험。연구결과표명：불동기질흡력조건하，비포화토적변형수시간적변화대치가이분위2개계단，동시기질흡력적존재대토체구유일정적경화작용；함수솔적증가회동시인기회탄변형화압축변형，대우연구구적비포화지기토，기회탄변형대우압축변형；재불동초시함수솔화불동수향응력작용하，연구구비포화지기토적연변변성특성흔소，차24 h 등시선도가이근사용3개직선단표체。
The creep tests were conducted by using the unsaturated soil consolidation apparatus in the considera-tion of matric suction and initial water content for the unsaturated foundation soil in Feidong area of Hefei region. The results show that the curve between deformation and time can be divided into two stages under the control of matric suction,and the matric suction has certain hardening effect for unsaturated soil.For the studied soil,the increase of water content may leads to the spring back deformation and compression deformation,and the spring back deformation is greater than the compression deformation.The creep degeneration characteristic of unsaturat-ed soil in the study area is small,and the 24 h isochron can be approximately expressed in three straight segment with different initial water content and vertical stress.