DB64 宁夏回族自治区 地方标准 DB 64/T 1646—2019 岩土工程勘察标准 Standard for investigation of geotechnical engineering 2019 - 07 - 23发布 2019 - 10 - 23实施 宁夏回族 自治区住房和城乡建设厅 宁夏回族自治区市场监督管理厅 发 布 DB64/T 1646—2019 目 次 前言 ................................................................................ IV 1 总则 .............................................................................. 1 2 规范性引用文件 .................................................................... 1 3 术语和符号 ........................................................................ 2 3.1 术语 .......................................................................... 2 3.2 符号 .......................................................................... 3 4 基本规定 .......................................................................... 5 4.1 岩土工程勘察分级 .............................................................. 5 4.2 前期工作 ...................................................................... 7 5 各类工程勘察基本要求 .............................................................. 8 5.1 工业与民用建筑 ................................................................ 8 5.2 边坡工程 ..................................................................... 12 5.3 基坑工程 ..................................................................... 13 5.4 桩基础 ....................................................................... 13 5.5 市政工程 ..................................................................... 15 5.6 废弃物处理工程 ............................................................... 15 5.7 地基处理 ..................................................................... 18 5.8 既有建筑物的增载和保护 ....................................................... 19 5.9 新能源电场工程 ............................................................... 20 6 不良地质作用和地质灾害 ........................................................... 23 6.1 滑坡 ......................................................................... 23 6.2 危岩和崩塌 ................................................................... 24 6.3 泥石流 ................................................................ ....... 25 6.4 采空区 ....................................................................... 26 6.5 场地和地基的地震效应 ......................................................... 28 7 特殊性岩土 ....................................................................... 31 7.1 湿陷性黄土和湿陷性土 ......................................................... 31 7.2 软土 ......................................................................... 37 7.3 混合土 ....................................................................... 38 7.4 填土 ......................................................................... 38 I DB64/T 1646—2019 7.5 膨胀岩土 ...................................................................... 39 7.6 盐渍岩土 ...................................................................... 40 7.7 风化岩和残积土 ................................................................ 41 7.8 污染土 ........................................................................ 42 8 地下水 ............................................................................ 43 8.1 一般规定 ...................................................................... 44 8.2 水文地质参数确定 .............................................................. 44 8.3 地下水作用的评价 .............................................................. 46 8.4 抗浮设防水位 .................................................................. 46 9 工程地质测绘和调查 ................................................................ 47 9.1 一般规定 ...................................................................... 47 9.2 工程地质调查 .................................................................. 47 9.3 工程地质测绘 .................................................................. 47 10 勘探和取样 ....................................................................... 49 10.1 一般规定 ..................................................................... 49 10.2