旋喷桩在大型油罐地基后加固中的应用

Application of Jet Grouting Method in Post-reinforcement on Large Oil Tank Foundation

旋喷桩虽一种地基加固方法 ,但成本相对较高,一般用于特殊的地基处理工程中,如低净空、高强度地层以及块石抛填地基等。在既有建筑地基后加固中,由于施工净空不足以及施工过程中结构的安全控制要求等原因,旋喷桩作为一个可选的方案在工程中得到了应用。油罐地基做为一种特殊基础,其变形控制要求较严格,在施工结束并进行试水运行过程中,会遇到变形较大,需要进行地基后加固的工况。文章选取了有代表性的某大型油罐基础的后加固施工,系统介绍旋喷注桩技术在该类地基后加固中的应用,为以后的相似工程提供借鉴和参考。

Jet grouting method, a kind of ground improvement method is usually applied for the high cost in the special improvement project, e.g. low clearance, soils with high strength, and rubble foundation etc. Hence in the post-reinforcement engineering, jet grouting method is an optional method for the limitation of less clearance and high requirement of structure safety. Oil tank foundation is a kind of special ground for the strict deformation requirement. After the tank construction and trial operation, the post-operation is necessary when the deformation is large. In this paper, a typical case on the post-reinforcement of the tank foundation was introduced, where the application of the jet grouting method was detailed discussed. This introduction can give a sample and reference for the similar projects.