土工基础

›› 2017, Vol. 31 ›› Issue (4): 481-485.

• 工程实录 • 上一篇    下一篇

基于岩土参数统计分析的地层划分研究

周文海1，李永东2   

  1. （1.北京科技大学，北京 100000；2.北京市勘察设计研究院有限公司，北京 100000）
  • 收稿日期:2016-08-23 修回日期:2016-09-06 出版日期:2017-08-20 发布日期:2017-08-22
  • 作者简介:周文海（1980-），男，工程师，研究方向为项目管理。

Soil Stratigraphy Classification Based on the Geotechnical Statistic Analysis

ZHOU Wenhai1， LI Yongdong2   

  1. (1.Beijing University of Science and Technology, Beijing 100000;
    2.BGI Engineering Consultant Ltd., Beijing 100000)
  • Received:2016-08-23 Revised:2016-09-06 Online:2017-08-20 Published:2017-08-22

摘要： 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。

关键词: 地层划分, 岩土参数统计, 标准差, 变异系数, 孔隙比, 压缩模量, 抗剪强度

Abstract: The soil stratigraphy and statistical analysis of the geotechnical engineering parameters are the important content of the geotechnical investigation. The accuracy of soil stratigraphy classification directly affect the site soil geotechnical engineering performance evaluation. In the conventional geotechnical investigation, the preliminary soil layers are classified based on the geological sediment conditions and soil parameters. The layers are finalized based on the laboratory test results and the soil layers can be adjusted. This paper presents a case history of the geotechnical investigation in Wangjing area of Beijing. The geotechnical engineering statistical works in areas with rich tested data are proposed. The soil parameters for major soil layers are summarized and the standard deviation, coefficient variations are also presented.

Key words: Soil Stratigraphy, Geotechnical Engineering Parameter Statistics, Standard Deviation, Coefficient of Variations, Void Ratio, Compression Modulus ；Shear Strength