【摘要】 安县晓坝镇处于"5.12"汶川大地震极重灾区,受灾严重,不具备重建条件,需选址重建。在野外详细调查的基础上,通过现场勘查和室内试验,深入研究了晓坝镇灾后新建场址的主要岩土工程问题。研究表明,新建场址主要土层为粉质粘土和淤泥质土,属高压缩性软弱土;地下水埋深浅,对基础施工和地基土承载力影响大;建筑场地类别Ⅱ类,属抗震不利地段。提出了深层水泥土搅拌法和换填地基两种软基处理方案,以及加强地基基础抗震设计等措施。更多还原

【Abstract】 Xiaoba Town of Anxian County,almost totally destroyed in the Wenchuan earthquake,did not have the reconstruction conditions and need to site redevelop.In order to study reconstruction-related geotechnical problems in heavy quake-hit areas,taking Xiaoba town as an example,we studied the main geotechnical problems of its new site based on detailed field survey and laboratory test.The results show that the main reconstruction-related geotechnical problems of this site are as follows: bad physical and mechanical properties of ground soils;shallow groundwater level;and unfavorable seismic site.Focusing on those problems,we present two methods,namely deep mixing method and replacement of ground soil method,to treat the soft ground,and suggest strengthening seismic design of subsoil-foundation.更多还原