ICS 93.020 P 13 备案号： 湖 DB42 北 省 地 方 标 准 DB42/T 1498—2019 公路工程地质钻探技术规程 Technical specification for geological drilling of highway engineering （报批稿） 2019-03 -28 发布 湖北省市场监督管理局 2019- 04 -28 实施 发 布 DB42/T 1498—2019 目 次 前言 .................................................................................III 引言 ...................................................................................V 1 范围 .................................................................................1 2 规范性引用文件 .......................................................................1 3 术语与定义和符号 .....................................................................1 3.1 术语与定义 .......................................................................1 3.2 符号 .............................................................................2 4 总则 .................................................................................2 5 钻探准备工作 .........................................................................3 5.1 作业指导书 .......................................................................3 5.2 孔位测量 .........................................................................3 5.3 钻机选型 .........................................................................3 5.4 场地的三通一平 ...................................................................4 5.5 钻探设备安装 .....................................................................4 6 钻进方法 .............................................................................4 6.1 一般规定 .........................................................................4 6.2 回转钻进 .........................................................................5 6.3 冲击钻进 .........................................................................6 6.4 冲击回转钻进 .....................................................................6 7 常规钻探 .............................................................................6 7.1 一般规定 .........................................................................6 7.2 黏性土、粉土地层 .................................................................6 7.3 砂土地层 .........................................................................7 7.4 碎石土地层 .......................................................................7 7.5 岩石地层 .........................................................................7 7.6 不良地质路段 .....................................................................7 7.7 特殊性岩土 .......................................................................8 7.8 堤防钻探 .........................................................................9 8 水上钻探 .............................................................................9 8.1 一般规定 .........................................................................9 8.2 钻探与成孔 .......................................................................9 9 水平及斜孔钻探 ......................................................................10 9.1 一般规定 ........................................................................10 9.2 钻探与成孔 ......................................................................10 10 水文地质钻探 .......................................................................11 10.1 一般规定 .......................................................................11 10.2 钻探与成孔 .....................................................................11 I DB42/T 1498—2019 10.3 简易水文地质观测 ............................................................... 12 11 护壁堵漏 ........................................................................... 12 11.1 一般规定 ....................................................................... 12 11.2 护壁堵漏方法 ................................................................... 12 12 钻探质量 ........................................................................... 13 12.1 一般规定 ....................................................................... 13 12.2 钻孔弯曲与孔深 ................................................................. 14 12.3 岩芯采取 ....................................................................... 14 12.4 岩土水试样的采取 ............................................................... 15 12.5 地下水位量测 ................................................................... 15 12.6 测试钻孔要求 ................................................................... 16 12.7 钻探现场记录 ................................................................... 16 12.8 封孔回填 ....................................................................... 17 13 钻探安全要求 .....................................