土木与环境工程学报（中英文）2024，Vol.46Issue(2)：70-78,9.DOI:10.11835/j.issn.2096-6717.2022.146
上覆CRSS快速固化淤泥硬壳层厚度对淤泥地基承载特性的影响
Influence of the thickness of the overlying CRSS rapid solidifying sludge hard shell layer on the bearing characteristics of sludge foundations
摘要
Abstract
The composite early strength soil stabilizer(CRSS)has the characteristics of rapid setting and high strength.The independently developed CRSS stabilizer is used to rapidly solidify the surface sludge as the overlying hard shell layer.Through model tests,the failure mode of the hard shell layer,p-s curve characteristics,the shape of the deflection basin and the distribution law of soil pressure under different overlying hard shell layer thicknesses(3 cm,6 cm,9 cm and 12 cm)are studied.On the basis of the existing deformation theory of the deflection basin,combined with the test results,deformation shape function of the deflection basin is modified.The results show that with increase of the thickness of the hard shell,the failure mode of the hard shell transits from folding failure to punching failure;The greater the thickness of the hard shell,the more obvious the diffusion effect,and the higher the ultimate bearing capacity,as well as the corresponding increase in settlement;the settlement displacement at different distances from the central point of the load plate can be described by the shape of the deflection basin.A modified formula for calculating the assumed deformation of the logarithmic deflection basin is proposed,which is more reasonable than the formula for calculating the assumed deformation of the linear deflection basin;the earth pressure decreases from the center outwards and gradually decreases along the depth direction;the distribution of earth pressure becomes more uniform with increase of the thickness of the hard shell.关键词
淤泥地基/复合型早强土壤固化剂/快速固化/硬壳层/承载力/弯沉盆Key words
sludge foundations/composite early strength soil stabilizer(CRSS)/rapid solidifying/hard shell layer/bearing capacity/deflection basin分类
建筑与水利引用本文复制引用
王明明,方祥位,刘汉龙,王忍,申春妮,张熙晨..上覆CRSS快速固化淤泥硬壳层厚度对淤泥地基承载特性的影响[J].土木与环境工程学报（中英文）,2024,46(2):70-78,9.基金项目
科技创新项目(20-163-13-ZT-007-060-01) Science and Technology Innovation Project(No.20-163-13-ZT-007-060-01) （20-163-13-ZT-007-060-01）
