论文部分内容阅读
地层划分与岩土参数统计分析是岩土工程勘察工作的重要内容,划分的精度和合理性直接影响到对场地土层的岩土工程条件的分析与评价。传统的岩土工程勘察中一般结合地质成因、沉积规律及岩土参数等方面,先进行初步划分,随后结合物理力学参数的统计情况,不断调整分层,最后划分出合理的地层层序。本文结合北京市大望京地区多个工程实例,提出在工程经验比较丰富的地区,开展区域性的岩土参数统计分析工作,初步确定了大望京地区地层层序情况,对各主要地层进行重点岩土参数的统计分析工作,以标准差及变异系数为控制指标,优化了地层层序划分,提出了各主要地层的分布标高、统计参数范围,对今后该地区岩土工程勘察工作具有借鉴意义。
Stratigraphic division and geotechnical parameters statistical analysis is an important part of geotechnical investigation. The accuracy and rationality of the classification directly affects the analysis and evaluation of the geotechnical conditions of the site soil. In the traditional geotechnical engineering survey, geology, sedimentation rules and geotechnical parameters are generally divided first. Then, according to the statistics of physical and mechanical parameters, the stratification is adjusted continuously, and finally the reasonable stratigraphic sequence is divided. Based on a number of engineering examples in Dawangjing area in Beijing, this paper proposes to carry out statistical analysis of regional geotechnical parameters in regions with rich engineering experience. The stratigraphic sequence of Dawangjing area is preliminarily determined, and key rock With the statistical analysis of soil parameters, taking the standard deviation and coefficient of variation as control indexes, the stratigraphic sequence is optimized. The distribution elevation of all the major strata and the range of statistical parameters are proposed, which can be used for geotechnical prospecting in this area in the future.