长江科学院院报2019，Vol.36Issue(2)：81-86,6.DOI:10.11988/ckyyb.20170832
砂岩地基上地下结构浮力特性研究
Buoyancy Characteristics of Underground Structure on Sandstone Foundation
摘要
Abstract
The buoyancy characteristics of underground structures on sandstone foundation are studied for anti-float-ing design and the seepage laws of groundwater are analyzed by indoor model tests and field monitoring tests. Re-sults show that since sandstone is impervious, seepage condition, seepage pressure, and seepage time could all af-fect the buoyancy acting on sandstone structure, among which seepage condition has the largest impact. The influ-ence of seepage pressure and seepage time on buoyancy changes with the variation of seepage condition. The buoy-ancy of underground structure on sandstone foundation can be reduced safely, and the reduction coefficient depends on the contact between basement and ground. The reduction coefficients in three contact conditions ( simple contact, contact with sealing treatment in the peripheral and fractures inside the sandstone, and contact with sealing treat-ment in the peripheral and no fracture inside the sandstone) are 0.82-0.91, 0.63-0.73, 0.31-0.50, respectively. It is recommended to ease the anti-floating requirements and adopt impermeable materials surrounding underground to alter seepage path and enhance reduction effect during foundation backfill.关键词
砂岩地基/地下结构浮力特性/模型试验/现场试验/折减系数Key words
sandstone foundation/buoyancy of underground structure/model test/field test/reduction coefficient分类
建筑与水利引用本文复制引用
张豫川,姚永国,潘增志,朱克文,高飞,杨琴..砂岩地基上地下结构浮力特性研究[J].长江科学院院报,2019,36(2):81-86,6.基金项目
国家安全生产监督管理总局安全生产重大事故防治关键技术科技项目(hunan-0008-2016AQ,hunan-0009-2016AQ) （hunan-0008-2016AQ,hunan-0009-2016AQ）
河南省矿产资源绿色高效开采与综合利用重点实验室开放基金项目(S201611) （S201611）
衡阳市科技计划项目(2016KS31) （2016KS31）
南华大学研究生科研创新项目(2017XCX01) （2017XCX01）
