瓯江三角洲深厚软土层中沉井施工技术研究

作者:宋立伟 王二成 蔡送宝 杨雪 张文帅
单位:天津市赛英工程技术咨询有限公司 河北工程大学土木工程学院
摘要:瓯江三角洲深厚沉积软土层中进行沉井作业时,沉井容易出现较大倾斜状态,通过单侧膨润泥浆减阻及对侧加大阻滑力的方式可以有效调整沉井姿态。通过数值计算研究了沉井下沉至设计标高时地表沉降及土层变形规律,并与监测点的实测沉降值进行对比分析,发现模拟值与实测值吻合良好,井底土体最大隆起量为62.1mm,最大应力分布在靠近井壁的井底大梁上。
关键词:沉井深厚软土姿态纠偏数值模拟施工技术
作者简介:宋立伟,博士,高级工程师,注册土木工程师(岩土),注册咨询工程师,E-mail:56370328@qq.com。
基金:中建股份专项科研课题资助项目(CSCEC-2020-Z-46)。 -页码-:107-109,112
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Research on Well-sinking Technology in Thick Mud Soil in Ou River Delta
SONG Liwei WANG Ercheng CAI Songbao YANG Xue ZHANG Wenshuai
(Tianjin Saiying Engineering & Technology Consulting Co., Ltd. School of Civil Engineering, Hebei University of Engineering)
Abstract: The obvious slant of well-sinking easily occurs when constructed in thick mud soil in Ou River delta, and the well-sinking posture can be adjusted effectively by churning resistance reducing mud on one side while increasing resistance on the other side. The rule of ground surface settlement and soil deformation was analyzed by numerical simulation, and the ground surface settlement was observed, then the contrastive analysis was conducted and found both results match each other well. The maximal heave of soil beneath pit bottom is 62.1 mm, and the maximal stress of well structure occurs in the section of beams near the well wall.
Keywords: well-sinking; thick soft soil; posture adjustment; numerical simulation; construction
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