辽宁工程技术大学学报（自然科学版）2024，Vol.43Issue(4)：425-433,9.DOI:10.11956/j.issn.1008-0562.20230434
膨胀土硬质地层振动载荷沉桩的挤土效应
Soil squeezing effect of vibratory pile sinking in expansive soil layer
摘要
Abstract
In order to study the soil squeezing effect of pile sinking under vibration load in expansive soil layer,based on the mechanical properties of shear expansion and water softening of expansive soil,the key technology of"hydrodynamic method"assisted pile sinking is proposed.Through field test and finite element calculation,the changing rules of deep horizontal displacement and deep soil pressure of the soil around the H-type and O-type steel sheet piles during pile sinking are summarized.The results shows that the deep horizontal displacement and deep soil pressure around the pile are closely related to the properties and depth of soil layer,and the shear expansion of expanding soil can significantly enhance the soil squeezing effect of the pile sinking.Compared with the pile sinking without auxiliary measures,the maximum value of deep horizontal displacement and deep soil pressure around the pile can be reduced by more than 50%when the pile sinking is assisted by"hydrodynamic method".The auxiliary measures of"hydrodynamic method"can significantly reduce the adverse effects of pile sinking on the surrounding environment,which provides important technical support for the design and construction of combined steel sheet pile support technology.关键词
膨胀土/振动载荷/沉桩/挤土效应/水冲法/钢板桩Key words
expansive soil/vibration load/pile sinking/soil squeezing effect/hydrodynamic method/steel sheet pile分类
矿业与冶金引用本文复制引用
张涛,蔡敏,孙闯,单灿灿,孙昌兴,郑永磊..膨胀土硬质地层振动载荷沉桩的挤土效应[J].辽宁工程技术大学学报（自然科学版）,2024,43(4):425-433,9.基金项目
国家自然科学基金项目(51704144) （51704144）
