CAJ | 학술논문

软土普遍具有结构性与流变特性.以天津滨海新区吹填场地有一定结构性的吹填软土为研究对象,通过三轴流变试验仪,开展了排水条件以及结构性对其流变特性影响的研究.试验结果表明,排水条件对流变有明显影响.不排水时,流变变形大;排水时,虽然总变形量大,但固结变形占较大比例,流变变形比例小,实际工程实践中可通过增加土体的排水条件减少流变的影响.结构性对土体流变的影响主要体现在所受外部荷载与结构屈服应力大小之间的关系.当外荷载小结构屈服应力时,流变变形小;当外荷载大结构屈服应力时,伴随着土结构的破坏,流变变形明显增大,但还是小同条件下无结构性的重塑土.
연토보편구유결구성여류변특성.이천진빈해신구취전장지유일정결구성적취전연토위연구대상,통과삼축류변시험의,개전료배수조건이급결구성대기류변특성영향적연구.시험결과표명,배수조건대류변유명현영향.불배수시,류변변형대;배수시,수연총변형량대,단고결변형점교대비례,류변변형비례소,실제공정실천중가통과증가토체적배수조건감소류변적영향.결구성대토체류변적영향주요체현재소수외부하재여결구굴복응력대소지간적관계.당외하재소결구굴복응력시,류변변형소;당외하재대결구굴복응력시,반수착토결구적파배,류변변형명현증대,단환시소동조건하무결구성적중소토.
Soft soil has structural and rheological characteristics usually. Through three triaxial rheological test, the paper studied the rheological properties effected by drainage conditions and structure on the basis of structural soft dredger fill in Tianjin Binhai new area. The results showed that the drainage conditions do have an obvious effect on rheological characteristics. Under conditions without drainage, rheological deformation is obvious; on the con-trary, although the total amount of deformation is huge, rheological deformation has a small proportion, so we can reduce the rheological effect by improving the drainage conditions of soil in engineering practice. Effect of struc-ture on rheology mainly reflected the relationship between the external load and the structure yield stress. When the external load is less than the yield stress, the rheological deformation is small; on the contrary situation, rheological deformation will increase significantly accompanied by the damage of soil structure, but it is still smaller than un-structured remodeling soil under the same conditions.