铁路堆场软土地基排水固结法现场试验研究-《高速铁路技术》

文章信息/Info

Title:: Field Test Study on Drainage Consolidation Method for Soft Soil Foundation in Railway Storage Yard

Author(s):: GAO Lingfa; China Railway Nanchang Group Co., Ltd., Nanchang 361007, China

Keywords:: railway|storage yard|soft soil|foundation|drainage consolidation|test|settlement

摘要:: 为研究排水固结法在软土地基中的实用性和有效性，文章以江阴港铁路堆场的软土地基处理工程为背景，首先采用塑料排水板堆载预压排水固结法对现场软土地基进行了试验，并对分级加载情况下的工后沉降进行了监测，然后利用FLAC3D有限元软件进行数值验证。结果表明：（1）现场试验和数值模拟结果表明二者变化规律基本一致；（2）随着土层深度的增加，土层固结沉降量逐渐减小；（3）在堆载过程中，浅层土体发生了较大的固结沉降，而在深层淤泥中由于排水不畅，较难发生固结。该研究成果可为相似地基处理工程提供参考。

Abstract:: To study the practicability and effectiveness of drainage consolidation method in soft soil foundation, taking the soft soil foundation treatment project of Jiangyin Port Railway Storage Yard as the background, the soft soil foundation was tested by preloading drainage consolidation method with plastic drainage plate, the post-construction settlement under the condition of graded loading was monitored, and was verified by FLAC3D finite element software. The results show that:(1) the change laws of the field test and numerical simulation are basically the same; (2) with the increase of soil depth, the consolidation settlement of soil layer decreases gradually; (3) during the preloading, the shallow soil has a large consolidation settlement, but in the deep silt, due to poor drainage, it is difficult to consolidate. The research results can provide reference for similar foundation treatment projects.