CAJ | 학술논문

采用室内物理模型试验对多种类型土工格栅与膨胀岩相互作用条件下的土体变形特性进行研究.研究表明,在吸湿条件下,膨胀岩产生明显的膨胀变形,土体产生张拉性裂缝而破坏.铺设土工格栅后,可以使膨胀岩的侧向变形明显减小,但对土体垂直沉降的影响不大.同时,格栅可以有效抑制裂缝的发生和发展,并改变了膨胀岩膨胀变形发展的模式和规律,更重要的是,土工格栅对土体吸湿后水分的运移过程也产生了明显的影响,表现为在一维入渗条件下,格栅加筋使得水分更难以向土体内入渗,浅层含水量开始变化以及稳定的时间都远远大于未加筋土,土体内含水量场的分布与未加筋土完全不同.
채용실내물리모형시험대다충류형토공격책여팽창암상호작용조건하적토체변형특성진행연구.연구표명,재흡습조건하,팽창암산생명현적팽창변형,토체산생장랍성렬봉이파배.포설토공격책후,가이사팽창암적측향변형명현감소,단대토체수직침강적영향불대.동시,격책가이유효억제렬봉적발생화발전,병개변료팽창암팽창변형발전적모식화규률,경중요적시,토공격책대토체흡습후수분적운이과정야산생료명현적영향,표현위재일유입삼조건하,격책가근사득수분경난이향토체내입삼,천층함수량개시변화이급은정적시간도원원대우미가근토,토체내함수량장적분포여미가근토완전불동.
Physical model tests are made to study the deformation characteristics of several geogrid-reinforced expansive rocks due to moisture absorption. Research result indicates that obvious expansion deformation takes place in expansive rock under the condition of moisture absorption, which causes soil mass to be damaged due to tensile crack. Geogrids embedded make it possible to obviously decrease the lateral deformation of expansive rock, but have little influence on the vertical settlement of soil. At the same time, geogrids can effectively restrain the occurrence and development of cracks, and alter the development law of expansion deformation of expansive rock. More importantly, geogrids exert significant effect on the transport process of moisture content. This shows that under the condition of one-dimensional infiltration, geogrid-reinforcement makes moisture content more difficultly to infiltrate toward soil mass, the time when moisture content in shallow layer begins to change and keeps stable is longer than unreinforced soil, distribution of moisture content field within reinforced-soil is completely different from that within unreinforced soil.