真空堆载联合预压法加固码头堆场火山灰软基效果分析  

Effect of vacuum surcharge preloading method on strengthening volcanic ash soft soil foundation of wharf yard

作　　者：李建忠 LI Jianzhong(CHN ENERGY Indonesia Java Power Generation Co.,Ltd.,Serang 42161,Indonesia)

机构地区：[1]国家能源集团印尼爪哇发电公司,万丹西冷42161

出　　处：《水运工程》2023年第3期165-172,共8页Port & Waterway Engineering

摘　　要：印尼爪哇7号项目厂址分布着一层深厚火山灰沉积软土,天然含水率115.4%、孔隙比3.21、塑性指数25.5。结合工程实践,对软土地基处理达到的效果及承载力增长缓慢的原因进行分析。以码头堆场软土地基处理为例,基于三点法计算工后沉降和固结度,验证该方法的有效性。通过十字板剪切试验及平板荷载试验数据分析,验证承载力特征值计算公式的适用性。结果表明,实测的地表沉降量1587~2496 mm、平均2307 mm,加固效果显著;地基固结度达到90%且十字板剪切强度大于20 kPa,满足设计要求。There is a deep layer of volcanic ash deposited soft soil in the site of Project 7 in Java,Indonesia,the natural moisture content is 115.4%,the pore ratio is 3.21,and the plasticity index is 25.5.Combining with engineering practice,we analyze the effect of soft soil foundation treatment and the reasons for the slow growth of bearing capacity.Taking soft foundation treatment in wharf yard area as an example,we calculate the post-construction settlement and consolidation degree by three-point method,and verify the effectiveness of this method.Through the analysis of vane shear test and plate load test data,we verify the applicability of the calculation formula of bearing capacity eigenvalue.The results show that the measured ground settlement is 1587 mm to 2496 mm,with an average value of 2307 mm,and the reinforcement effect is remarkable.The consolidation degree of the foundation reaches 90%and the shear strength of the vane is greater than 20 kPa,which can meet the design requirements.

关 键 词：真空堆载 加固 码头堆场 火山灰 软土地基 

分 类 号：TU447[建筑科学—岩土工程] U655.54[建筑科学—土工工程]