路基工程
路基工程
로기공정
SUBGRADE ENGINEERING
2011年
4期
31-33,36
,共4页
戈壁土%粗粒土%高速铁路路基%填料颗粒组成%含水率
戈壁土%粗粒土%高速鐵路路基%填料顆粒組成%含水率
과벽토%조립토%고속철로로기%전료과립조성%함수솔
desert soil%coarse-grained soil%high-speed railway subgrade%filling composition%water content
通过兰新高速铁路第二双线路基试验段戈壁土现场填筑试验及室内土工试验,研究了戈壁土的颗粒组成、颗粒级配、粗颗粒含量P5、细颗粒含量、含水率控制对压实效果的影响。结果表明,对于高速铁路路基填料,其不均匀系数：基床以下路堤Cu≥15、基床底层Cu≥20为宜;随着填料中粗料含量P5的增大,填料的干密度增大,当粗料含量在70%左右时达最大;含水率大小对粗粒土的压实效果的影响,主要由填料中细粒含量（d≤0.075 mm）的多少而定。
通過蘭新高速鐵路第二雙線路基試驗段戈壁土現場填築試驗及室內土工試驗,研究瞭戈壁土的顆粒組成、顆粒級配、粗顆粒含量P5、細顆粒含量、含水率控製對壓實效果的影響。結果錶明,對于高速鐵路路基填料,其不均勻繫數：基床以下路隄Cu≥15、基床底層Cu≥20為宜;隨著填料中粗料含量P5的增大,填料的榦密度增大,噹粗料含量在70%左右時達最大;含水率大小對粗粒土的壓實效果的影響,主要由填料中細粒含量（d≤0.075 mm）的多少而定。
통과란신고속철로제이쌍선로기시험단과벽토현장전축시험급실내토공시험,연구료과벽토적과립조성、과립급배、조과립함량P5、세과립함량、함수솔공제대압실효과적영향。결과표명,대우고속철로로기전료,기불균균계수：기상이하로제Cu≥15、기상저층Cu≥20위의;수착전료중조료함량P5적증대,전료적간밀도증대,당조료함량재70%좌우시체최대;함수솔대소대조립토적압실효과적영향,주요유전료중세립함량（d≤0.075 mm）적다소이정。
Through site filling test and indoor geotechnical test of desert soil in the second double-line section of Lanzhou-Xinjiang High-speed Railway,the influence of grain composition,graduation,coarse particle content P5,fine particle content and water content on compaction effect are studied.The results show that the uniformity coefficient Cu of high-speed railway subgrade filling should be no less than 15 for the embankment below subgrade bed and 20 for base course.Dry density of filling increases with the content of coarse particles P5.When the content of coarse particles is 70 %,dry density is the maximum.The influence of water content on compaction effect is mainly determined by the content of fine particles（d≤0.075 mm）.
