海南风化剥蚀地貌岩土工程勘察实例浅析

Analysis of Geotechnical Engineering Investigation of Hainan Weathered and Eroded Landform

结合海南省琼海市某风化剥蚀平原地貌下的工程勘察实例,通过采用多种勘察手段,查明了场地的岩土工程条件。场地内存在不同类型、不同风化程度的岩石,早期形成的砂岩、花岗岩与第四系早更新统形成的玄武岩之间充填了海陆相沉积的粘性土、砂土等,组合形成了具有空间分布复杂、软硬不均、强度差异大、存在软弱夹层等特点的地基岩土层。根据勘察结果,阐述了此类岩土条件下地基的复杂程度及均匀性,分析了基岩面起伏变化大、岩石间软弱夹层、火山岩硬夹层等特点对工程建设的影响。对小区建筑群中不同规模单体建筑,存在岩土工程问题,给出了处理措施与建议,并应用于项目建设,取得了良好的社会效应。

Combined with an engineering survey example under a weathered and eroded landform in Qionghai City,Hainan Province,the geotechnical engineering conditions of the site were identified by using a variety of investigation methods.There are different types of bedrocks with different degrees of weathering at the site.The sandstones and granites formed in the early period and the basalts formed in the Early Pleistocene of the Quaternary are filled with cohesive soil and sandy soil of marine and terrestrial deposits,forming a complex spatial distribution.Uneven hardness within the rock mass,large difference in shear strength,weak interlayer and other characteristics of the bedrock and soil layers.According to the investigation results,the complexity and uniformity of the proposed foundation under such geotechnical conditions are evaluated,and the influence of the characteristics of the large undulations of the bedrock surface,the soft interlayer between the bedrock and the hard interlayer of volcanic rock on the construction of the project is analyzed.For the individual building structures with different dimensions in the residential complex,potential geotechnical engineering problems,and the treatment measures and suggestions are presented in the paper.