第39春第2期 2017年4月
土木建筑与环境工程
Journal of Civil,Architectural &. Environmental Engineering
doi;10.11835/j.issn. 1674-4764. 2017.02.008
Vol, 39 No. 2 Apr.2017
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不同地层比功阈值优化的统计方法及其应用
刘先珊，张同乐，牛万保
（重庆大学土木工程学院；山地城镇建设与新技术教育部重点实验室，重庆400045）
摘要：采用在线监测系统监测进行随钻参数的采样与分析，建立了派生参数与直测参数的理论表达式，提出了多因素组合的地层比功模型，实现了地层地质条件与随钻参数的有机结合。以重庆市某高压变电站施工场地为依托，建立了不同地层如素填土层、粉质粘土层、砂岩层及泥岩层的地层比功演化曲线，对比地勘信息可知，不同地层的比功值存在显著差异。可见，合理的地层比功阔值是辨识地层类型的重要参量。运用统计学原理对勘测孔附近不同地层的比功值阔值进行保值优化，通过地勘获得的地层信息来验证阔值区间的可靠性。进一步采用如上地层比功阔值对该区域的其他桩位所在地层进行分析验证，说明了地层比功闵值优化的统计方法可行，其阔值区间合理，可用于其他赋存环境的地层比功阀值确定及地层识别。
关键调：旋挖钻机；随钻参数；比功模型；统计分析；阔值优化
中图分类号：TU473.1
文献标志码：A
文章编号：1674-4764(2017)02-0058-07
Statistical analysisofworkratiothresholdof different
formationsanditsapplication Liu Xianshan,Zhang Tongle,Niu Wanbao
(School of Civil Engineering, Key Laboratory of New Technology for Construction of Cities in Mountain Area,
Ministry of Education,Chongqing University, Chongqing 400045, P, R. China)
Abstract: The drilling parameters in the rotary drilling process were sampled and analyzed using online monitoring system. The theoretical expressions between the derived parameters and direct sampling parameters were constructed, and the model of formation work ratio considering multi-factor combinations was also proposed to realize the perfect integration of geological conditions and drilling parameters. With the case study of a construction field of the high voltage substation in Chongqing, the curves of different formations such as backfilled soil, silty clay sandstone and mudstone formations were described and compared with the geological survey, the comparison presented obvious difference of different formations. The above results indicated that rational work ratio thresholds were significant to identify the strata
收稿日期：2016-06-20
基金项目：中央高校基本科研业务费（106112014CDJZR200014，106112014CDJZR200015）；国家白热科学基金
（51478065)；国家山区公路工程技术研究中心（GSGZJ-2015-09）
作者简介：刘先班（1978-），女，博士，副教授，主要从事建筑基础与地下工程研究，（E-mail)liuxianshan①163.com Received;2016-06-20
Foundation item: Fundamental Research Funds for the Central Universities ( No.106112014CDJZR200014,
106112014CDJZR200015); National Natural Science Foundation of China (No, 51478065); National Highway Engineering Technology Research Center (No, GSGZJ-2015-09)
Author brief Liu Xianshan(1978-), PhD,associate professor,main research interest building foundation and underground
engineering,(E-mail) liuxianshan@163. com.
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