摘要
随着工程建设的日渐增多,室内土工试验项目和数量也相应增多。在工期紧、任务急的情况下,出现不确切问题较为明显。分析认为,土工试验产生误差的原因主要是现场取样不合理、土质本身的特殊性、试验方法的缺陷以及操作的不规范造成的,并提出了相应的改进措施。最后指出,土样加荷试验时,每块砝码的加压时间掌握在6s为宜;应采用76g锥下沉深度17mm时测得的含水率为液限标准;蜂窝结构和絮凝结构的土不能用作天然地基;窒内试验结果与野外描述有差别时,应根据具体情况分段或单独取样试验。
Along with the increasing of engineering construction,the project and number of indoor geotechnical testing are increasing correspondingly.Under the situation of pressing time limit and urgent task,problems of inaccuracy come forth obviously.The analysis considered that the causation of geotechnical testing error origin is mainly from improper site sampling,particularity of soil texture,imperfect test method and nonstandard operation,and corresponding improved measures put forward.Finally the authors point out： during the load test,6 second is favorable for loading time of every weight;using the moisture content of 76 gram cone 17mm penetrating depth as the liquid limit;soil with alveolar and flocculated structures cannot be used as natural foundation;when difference is existed between indoor test results and field description,should be segmented or separated sampling depend on the situation.
出处
《中国煤炭地质》
2011年第12期32-34,共3页
Coal Geology of China
关键词
土工试验
试样
误差分析
geotechnical testing
sample
error analysis
