CAJ | 학술논문

为了研究乌兰布和沙漠风积沙的工程性质和其作为坝壳填筑料的可行性，通过室内土工试验、现场原位测试，以及现场碾压试验，对风积沙的物理化学性质、力学性质、静力和动力三轴特性、渗透性、击实特征和压实性能进行了试验研究。结果表明：风积沙颗粒组成以细沙粒为主，粉黏粒含量很低，颗粒均匀，属级配不良沙；在风积沙堆积厚度较大的区域，表层呈松散至中密状，下部一般能达到中密至密实状；风积沙击实曲线具有双峰，即在最小含水率和最优含水率条件下均可得到相对较大的干密度；按照最佳碾压组合方式现场碾压后，风积沙相对密度可达0．76，碾压后含泥量小于8％，内摩擦角大于30°，渗透系数大于1×10-3 cm/s；对于工程级别相对较低的挡水建筑物，或者是地震烈度较低的区域，风积沙作为浸润线以下的坝壳填筑料是可行的。
위료연구오란포화사막풍적사적공정성질화기작위패각전축료적가행성，통과실내토공시험、현장원위측시，이급현장년압시험，대풍적사적물이화학성질、역학성질、정력화동력삼축특성、삼투성、격실특정화압실성능진행료시험연구。결과표명：풍적사과립조성이세사립위주，분점립함량흔저，과립균균，속급배불량사；재풍적사퇴적후도교대적구역，표층정송산지중밀상，하부일반능체도중밀지밀실상；풍적사격실곡선구유쌍봉，즉재최소함수솔화최우함수솔조건하균가득도상대교대적간밀도；안조최가년압조합방식현장년압후，풍적사상대밀도가체0．76，년압후함니량소우8％，내마찰각대우30°，삼투계수대우1×10-3 cm/s；대우공정급별상대교저적당수건축물，혹자시지진열도교저적구역，풍적사작위침윤선이하적패각전축료시가행적。
In order to investigate engineering properties and behavior of aeolian sand in Desert Wulanbuhe to be used as embankment material,such as physical and chemical properties,mechanical property,static and dynamic triaxial properties,permeability,compaction characteristics and com-pacting effect,a series of laboratory tests,field tests and large-scale testing compaction were performed. The results indicate that the aeolian sand is mainly composed of fine sand with minor silt and clay,homogenous,falls into SP (Poorly graded Sand),loose to slightly dense at the top and medium dense to dense at the lower. Double-peak curve is obtained in compaction tests,which indicates that a maximum value of dry density can be obtained at lower and optimum moisture contents. The results of testing compaction by optimum combination methods show that the aeolian sand has relative density up to 0. 76,silt and clay particles of less than 8% after compacting,internal friction angle of more than 30° and permeability coefficient of more than 1 × 10 -3 cm/s. Thus for lower grade dam structure and seismically stable region with lower intensity,aeolian sand can be used as soakage embankment material of dam.