基于塑料排水板处理的滨海软土路基临界填筑高度研究  

STUDY ON CRITICAL FILLING HEIGHT OF COASTAL SOFT SOIL SUBGRADE BASED ON PLASTIC DRAINAGE PLATE TREATMENT

作　　者：冯荣先 金军良 钟钙冰 程文才 叶锡钧[2] FENG Rong-xian;JIN Jun-liang;ZHONG Gai-bing;CHENG Wen-cai;YE Xi-jun(The First Engineering Company of CCCC Fourth Harbor Engineering Co.,Ltd.,510450,Guangzhou,China;School of Civil Engineering,Guangzhou University,510006,Guangzhou,China)

机构地区：[1]中交四航局第一工程有限公司,广州510450 [2]广州大学土木工程学院,广州510006

出　　处：《建筑技术》2024年第17期2113-2116,共4页Architecture Technology

基　　金：国家自然科学基金项目(51908150)。

摘　　要：依托马来西亚某滨海铁路项目,考虑软土固结作用和塑料排水板的影响范围,提出了软土路基临界填筑高度的修正计算公式,并通过现场实测数据验证了该公式的有效性。结果表明:地表固结沉降变形随着路基填筑高度的增加而增大,但变化速率为非线性。临界高度前,地表沉降变化速率较小;达到临界填筑高度时,填土高度-地表沉降过程曲线出现拐点;临界高度后,地表沉降变化速率随路基填筑高度的增加而显著增大,曲线斜率较陡。塑料排水板间距越大,路基临界填筑高度越高,两者呈正相关关系。修正后的临界填筑高度计算值与实测值较为接近,差值平均值为0.162,标准差为0.411,修正的临界高度计算公式较精确、可靠。Based on a coastal railway project in Malaysia a modified formula for calculation of the critical filling height of a soft soil subgrade was proposed,considering the consolidation of soft soil and influence of plastic drainage plates.In addition,the effectiveness of this formula was verified with measured data.Results showed:the surface deformation in consolidation settlement grew at a nonlinear rate with the subgrade filling height increasing.In front of the critical height,the change rate of surface settlement was small;at the critical height,there was an inflection point on the filling height-surface settlement curve;and behind the critical height,the change rate of surface settlement rose greatly with the subgrade filling height increasing,and the slope of the curve was large.The larger the spacing of plastic drainage plates,the greater the critical filling height of subgrades.That is,they are positively correlated.The calculated value of the modified critical filling height was close to the measured value,with an average deviation of 0.162 and standard deviation of 0.411.Therefore,the modified formula for the critical height is accurate and reliable.

关 键 词：软土路基 塑料排水板 临界高度 固结沉降 

分 类 号：U416.1[交通运输工程—道路与铁道工程]