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以福州江阴港铁路大型货场的软基处理项目为背景,对四种常用的软基处理工法(包括排水板堆载预压、砂桩堆载预压、真空联合排水板堆载预压、搅拌桩联合排水板堆载预压)进行了工程适用性研究。通过对现场监测、原位测试与室内试验数据的分析,在现有规范公式的基础上引入了两个新参数,提出了东南滨海相欠固结软土的抗剪强度与压缩模量随上覆荷载增长的经验公式。这种反映软土主要力学指标随上覆荷载发展的规律,可以为东南沿海地区类似条件下的软基处理工程提供借鉴与参考。
Based on the soft foundation treatment project of large freight yard of Jiangyin-Hongkong Railway, four kinds of commonly used soft foundation treatment methods (including preloading of drainage board, preloading of sand pile, preloading of vacuum combined drainage board, Pile joint drainage board preloading) carried out engineering applicability study. Based on the analysis of on-site monitoring, in-situ testing and laboratory test data, two new parameters were introduced based on the existing standard formulas, and the shear strength and compressive modulus of southeastern coastal undeveloped consolidated soft soil Empirical formula for increasing load. This law reflecting the development of major mechanical indexes of soft soil with overburden can provide references for soft foundation treatment projects under similar conditions in the southeastern coastal areas.