摘要
研究目的：天津港集装箱物流中心堆场一期工程地表主要为碱渣覆盖,厚度1.4-3.8 m,以下淤泥或淤泥质粘土层厚约20 m。必须根据场地各功能区的承载需要加固地基,从而满足设计荷载下的沉降控制标准要求。研究方法：根据堆场的使用功能,对场地进行合理分区,确定各功能区的设计荷载、铺面类型和沉降控制标准,在分析场地工程地质、水文地质条件的基础上,进行堆场地基加固处理方案研究,确定适宜的工程措施与监测检测要求。研究结果：采用真空预压排水固结、水泥搅拌桩等措施对堆场地基进行了加固处理,经检测,效果良好。研究结论：真空预压排水固结法能够改善软土地基的受力特征,消除软基的有害变形,适合于饱和软黏土地基的加固处理,当地基天然含水量高、地下水具有侵蚀性或软土层深厚时,效果尤佳。经过加固处理后,碱渣可以作为良好的地基使用,变废为宝,具有良好的经济效益和社会效益。
Research purposes： The first phase of construction of Tianjin harbor logistic center container yard is covered by 1.4 - 3.8 m caustic dross beneath which is 20 m silt and silty claypan. We must strengthen the foundation according to the load of yard function sections, and satisfy the requirement of settlement controlling standards of design loads. Research methods：According to the utility function, the yard is partitioned reasonably, also design loads, surface type and settlement controlling standards are determined. Based on geological and hydrological condition, in addition to scheme of yard foundation strengthening is studied, proper engineering measure and test demands are determined. Research results ：The testing results are fine after strengthening the yard by vacuum prepressing, cement deep mixing pile. Research conclusions：Vacuum prepressing can improve the mechanics condition of the foundation, eliminate harmful deformation. The method is suitable for saturated soft clay foundation, especially when the natural moisture is high or erosive ground water or thick soft clay. After treatment, caustic dross can beused as fine foundation making good use of offal which has good economic benefits and social benefits.
出处
《铁道工程学报》
EI
北大核心
2007年第10期25-27,35,共4页
Journal of Railway Engineering Society
关键词
堆场
碱渣
地基加固
真空预压
yard
caustic dross
foundation strengthening
vacuum prepressing
