岩基载荷试验的试验成果及其运用分析

Analysis on Test Results and Application of Rock Foundation Loading Test

山区地基的优势为,岩石地基相比土质地基承载力更高,变形更小,基础形式更为简单,且多为桩基础和独立基础等。为了更好地发挥山区岩石的承载力,重庆地区编制了地方标准,修订了单桩竖向承载力通过岩基载荷试验确定的计算公式,很好地利用了山区岩石地基的作用机理,节约了工程造价。该文发现在众多设计文件和试验报告中,许多工程技术人员对岩基载荷试验的实验成果与使用存在误读,特别是国家标准和地方标准在计算公式上的不一致,容易造成在具体运用中混淆不清。为了进一步理清不同标准之间的关系,明确岩基载荷试验成果在使用上的路径,该文对不同标准中有关岩基载荷的规定进行了对比与分析,可为相关研究提供一定参考。

In mountainous areas,rock foundations,compared with soil ones,have greater bearing capacity,less deformations,simpler forms,and most are pile foundations and independent foundations.In order to better utilize the bearing capacity of rocks in the mountainous area,Chongqing has compiled local standards,revised the calculation formula for the vertical bearing capacity of a single pile determined by the rock foundation load test,which makes good use of the action mechanism of the rock foundation in the mountainous area and saves the project cost.This paper found that in many design documents and test reports,many engineers and technicians misunderstood the experimental results and the use of rock foundation load tests.In particular,the inconsistency in calculation formulas between national standards and local standards can easily cause confusion in specific applications.In order to further figure out the relationship between different standards and clarify the use of rock foundation load test results,this paper comparatively analyzed the rock foundation load regulations in different standards,which can provide a certain reference for related research.