中南大学学报（自然科学版）2017，Vol.48Issue(2)：448-456,9.DOI:10.11817/j.issn.1672-7207.2017.02.024
竖井地基热排水固结模型试验
Model test on thermal drainage consolidation of foundation with vertical drain
摘要
Abstract
Model test system was designed for thermal shaft drainage consolidation, and then tests of thermal drainage consolidation and drainage consolidation were carried out by selecting typical soft clay of Ningbo area at room temperature and the hydrothermal fluid circulation temperature of 70℃, respectively. The change law of temperature and pore water pressure of each measuring points and ground surface settlement were analyzed for the heating, step loading and cooling (constant load) stage, and the mechanism of thermal drainage consolidation was preliminary elaborated. The results show that the thermal drainage consolidation method can accelerate the consolidation rate of the ground model, and consolidation time required to achieve 90% reduction compared with the drainage consolidation method significantly. After the temperature history, the final settlement of the surface, shear strength increase, and the soft ground treatment effect is enhanced. On this basis of tests, combined with the existing preconsolidation pressure varies with temperature theory, the formula for calculating the subsidence of thermal drainage consolidation method is developed according to e-lgp curve, and theoretical calculations of the ground surface settlement of the shaft foundation are in good agreement with the experimental results, which initially verifies the reasonableness of settlement calculation formula.关键词
热排水固结/模型试验/竖井地基/e-lgp曲线/沉降Key words
thermal drainage consolidation/model test/shaft foundation/e-lgp curve/settlement分类
建筑与水利引用本文复制引用
刘干斌,范高飞,陶海冰,尹铁锋,邓岳保..竖井地基热排水固结模型试验[J].中南大学学报（自然科学版）,2017,48(2):448-456,9.基金项目
国家自然科学基金资助项目(51278256, 51478228)(Projects(51278256, 51478228) supported by the National Natural Science Foundation of China) （51278256, 51478228）
