工程地质学报2017，Vol.25Issue(1)：11-18,8.DOI:10.13544/j.cnki.jeg.2017.01.002
高真空击密法在平潭综合实验区吹填软基处理效果评价
APPLICATION OF HIGH VACUUM DENSIFICATION METHOD TO SOFT SOIL FOUNDATION TREATMENT ENGINEERING AT PINGTAN COMPREHENSIVE EXPERIMENTAL AREA
摘要
Abstract
According to conditions of the soft foundation and processing requirements,this paper introduces a new high vacuum densification method (HVDM).To exame the proposed method,tests are done before soft soil foundation treatment,at the end of the soft soil foundation treatment and 5months after the end of the soft soil foundation treatment,respectively.Plate load test on the hydraulic fill sand surface is done after the construction.The results show that,the foundation soil strength is greatly improved by using HVDM.The sand layer's cone tip resistance,the side friction,and the undrained shear strength of silt layer are increased by 406.3％,360.8％ and 60.3％,respectively.The treatment effect is more obvious in the range of 6～7m deep.The physical and mechanical properties are improved to varying degrees.The dry density,is increased by 6.08％.The pore compression coefficient decreased by 8.96％.The a1-2 decreased by 10.53％.The compression modulus of Es1-2 increased by 12.18％.Direct shear strength increased by 8.91％.The internal friction angle increased by 41.01％.The cohesion from triaxial(UU) test increased by 33.04％.The foundation bearing capacity increased from less than 50kPa to over 120kPa,which can meet the requirements of foundation treatment.关键词
软土地基处理/高真空击密法/静力触探试验/十字板剪切试验Key words
Soft soil foundation treatment/High vacuum densification method/Static cone penetration test/Vane shear test分类
建筑与水利引用本文复制引用
施有志,柴建峰,林树枝,赵花丽..高真空击密法在平潭综合实验区吹填软基处理效果评价[J].工程地质学报,2017,25(1):11-18,8.基金项目
福建省自然科学基金项目(2016J01271),福建省教育厅科技项目(JK2013035),福建省住房和城乡建设厅科学技术项目(2015-K-38),福建省住房和城乡建设厅科学技术项目(2016-K-26)资助. （2016J01271）
