排水板加固软土地基的变形及孔隙水压力研究
Investigation on Foundation Deformation and Pore Water Pressure in Reinforcing Soft Clay with Drain Plates
浏览(2291) 下载(1)
- DOI:
- 作者:
- 霍吉栋
HUO Ji-dong
- 作者单位:
- 神华天津煤炭码头有限责任公司 天津 300452
Shenhua Tianjin Coal Dock Company, Ltd., Tianjin 300452, China
- 关键词:
- 软土地基;加固;排水板;等效变换;变形;孔隙水压力
soft foundation;reinforcement;drain plates;deformation;pore water pressure
- 摘要:
- 天津港南疆某围埝工程中，下部软黏土较厚，采用了塑料排水板加固地基，在加固后的地基上成功地使用了水泥固化土模袋施工工艺。文章结合该工程进行了排水板加固软土地基的变形及孔隙水压力研究，把轴对称问题转换为平面应变问题进行分析，通过等效变换，将排水板变换为连续的排水墙；同时考虑了模袋的加筋作用以及提高固化土强度的作用，采用土体的硬化模型模拟地基土体的固结过程。文中将计算结果与工程的实际监测数据进行对比，数据吻合较好，说明该理论模型能够较好地模拟工程施工过程中排水板加固软土地基的变形及孔隙水压力变化规律，对类似工程设计施工具有一定的指导意义。
In a cofferdam project of Tianjin Hasor, the plastic drain plates were adopted to rein-force thick soft clay foundation.Afterwards on the reinforced foundation, the construction technique ofgeobags filled with cement solidifying clay was successfully applied.Associated with the project,the in-vestigation on foundation deformation and pore water pressure in reinforcing clay with drain plates was carried out.For analysis, the axial symmetric problem was converted to a planar strain problem, andain plates were equivalently transformed to a continuous drain wall, in addition, the enforcing actionand increasing solidified soil strength effect of geobag were taken into account,the soil hardening model was applied to simulate the solidifying process of foundation soil.The calculational results were comparedwith tested data and found in good.2006,4(4): 7-11 收稿日期：2005-12-18分类号：TU447作者简介：霍吉栋(1974— ），男，河北黄骅人，工程师，1996年毕业于天津大学港口及航道工程专业，现从事港口工程管理工作。参考文献：
[1] 张学言,闫澍旺.岩土塑性力学基础[M] .天津:天津大学出版社,2004.
[2] 欧阳仲春.现代土工加筋技术[M] .北京:人民交通出版社,1991.
[3] 陈立宏,陈祖熠,李广信.砂井地基有限元计算的等效平面应变算法[J] .土木工程学报,2004,37(6):82-86.