Prof. Stefan Larsson
斯特凡·拉尔松教授
瑞典皇家理工学院岩土工程教授、土与岩石力学部负责人；建筑与建成环境学院博士教育负责人
Lecture
北欧干式深层搅拌法在基础设施建设中的应用
The Nordic Dry Deep Mixing Method for Infrastructure Development
Biography
嘉宾介绍
斯特凡·拉尔松教授拥有35年以上土木工程承包、咨询和学术研究经验，参与过大量基础设施项目和科研工作。自2010年起，他担任瑞典皇家理工学院（KTH）岩土工程教授及土与岩石力学部负责人；此前曾同时担任KTH副教授和Skanska瑞典公司基础工程区域技术经理，并曾在Tyréns工作10年，从事岩土工程专业服务和产业博士研究。他还通过个人公司承担多种形式的专家咨询工作。
其研究重点包括深层搅拌、竖向排水和土体压实等地基处理方法，土体与岩体设计施工中的风险与可靠度分析，以及铁路路堤离散元建模、人工智能应用和岩土工程全寿命成本分析等新兴方向。其所在团队与瑞典交通管理局、多家科研基金会以及咨询、承包和设备制造企业开展广泛合作。
他已指导21名博士和副博士毕业，并指导或评审140余篇硕士学位论文。除承担本科、硕士和博士课程外，他还担任KTH建筑与建成环境学院博士教育负责人，并参与学院管理咨询工作。
Lecture Abstract
报告摘要
中文内容根据会务组提供的英文Biography与Abstract整理。
北欧干式深层搅拌技术自20世纪70年代中期开始成功应用。该方法最初采用石灰处理形成具有延性的柱体，后来逐渐转向水泥基固化剂，形成刚度更高但更脆的柱体，也因此带来新的设计挑战。近年来，为实现更可持续的地基处理，工业副产品等替代固化材料得到越来越多的应用。
报告回顾北欧地区25年来干式深层搅拌技术的发展经验，涵盖基础设施项目设计方法、承载能力极限状态和正常使用极限状态分析、基于可靠度的方法、工程材料性质、施工生产控制以及实践经验和教训。相关内容基于具有代表性的学位论文、研究报告和学术论文，系统展示该方法的发展过程及当前工程实践。
Biography — English+
I have more than 35 years of experience as a civil engineering contractor, consultant, and scholar in the construction sector, and have been involved in numerous infrastructure projects and research initiatives. Since 2010, I have served as a Full Professor in Geotechnology and Head of the Division of Soil and Rock Mechanics at KTH. Prior to that, I held a joint position as an Associate Professor at KTH and Technical Manager of the Foundation Region at Skanska Sweden AB. I also spent 10 years at Tyréns as a geotechnical specialist and industrial doctoral student. I also work in my own company with expert consulting in various roles.
My research interests primarily concern ground improvement methods such as deep mixing, vertical drains and soil compaction, risk and reliability analysis for design and construction in soil and rock, and, more recently, discrete element modelling of railway embankments, artificial intelligence applications, and life-cycle cost (LCC/LCCA) analyses in geotechnics.
The Division of Soil and Rock Mechanics conducts research across a broad spectrum and collaborates with many funding bodies, including the Swedish Transport Administration, SBUF, BeFo, SVC, SKB, the Swedish Research Council Formas, as well as several consulting, contracting, and manufacturing companies such as Tyréns, ELU, Sweco, Itasca, Skanska, Peab, Dynapac, and others.
I have supervised 21 PhD and Licentiate graduates and have been the supervisor or examiner for more than 140 MSc thesis students. I am also responsible for several courses at the undergraduate, graduate, and doctoral levels. I am passionate about education and currently serve as Director of Third-Cycle Education at the School of Architecture and the Built Environment at KTH, where I am also a member of the School Management Advisory Board.
Abstract — English+
The Nordic Dry Deep Mixing (DDM) technique has been successfully used since the mid-1970s. Initially developed for lime-treated columns with ductile behaviour, the method has since evolved toward cement-based binders that produce stiffer, more brittle columns, introducing new design challenges. In recent decades, alternative binders, including industrial by-products, have been increasingly adopted for sustainable ground improvement.
This paper reviews 25 years of Nordic experience with DDM, covering design approaches for infrastructure projects, analyses in the ultimate and serviceability limit states, reliability-based methods, engineering properties, production control, and lessons learned. The review is based on selected theses, reports, and research papers illustrating the method’s development and current practice.