ICS93.010 CCSP13 21 辽宁省地方标准 DB21/T4413—2026 软土海床资源开发与灾害预警勘察技术规 程 Specificationforsurveyanddisasterwarninginresourcedevelopment ofsoftseabedsoil 2026-03-30发布 2026-04-30实施 辽宁省市场监督管理局  发布DB21/T4413—2026 I目次 前言.................................................................................III 1范围.................................................................................1 2规范性引用文件.......................................................................1 3术语和定义...........................................................................1 4勘察阶段与勘察等级...................................................................2 4.1勘察阶段.........................................................................2 4.2勘察等级.........................................................................3 5地质测绘调查.........................................................................4 5.1一般规定.........................................................................4 5.2软土海床资源开发地质测绘和调查...................................................4 6致灾作用调查.........................................................................4 6.1一般规定.........................................................................4 6.2风作用...........................................................................5 6.3波流作用.........................................................................5 6.4地震作用.........................................................................5 6.5海冰作用.........................................................................5 7钻探、取样与原位测试.................................................................5 7.1一般规定.........................................................................5 7.2钻探设备及机具选择...............................................................6 7.3钻探方法.........................................................................6 7.4取样要求和方法...................................................................6 7.5钻探编录.........................................................................7 7.6底质声学原位测试.................................................................7 7.7静力触探试验（CPT）..............................................................8 7.8原位十字板剪切测试...............................................................9 7.9标准贯入试验（SPT）.............................................................10 7.10波速测试.......................................................................10 8船基土工测试........................................................................10 8.1一般规定........................................................................10 8.2微型十字板剪切试验..............................................................10 8.3海洋土落锥试验..................................................................12 8.4全流动贯入试验..................................................................12 9室内试验............................................................................14 9.1一般规定........................................................................14 9.2分级加载标准固结试验............................................................14 9.3应变控制加荷固结试验............................................................14DB21/T4413—2026 II9.4静态直剪试验....................................................................14 9.5单调加载单剪试验................................................................14 9.6循环单剪试验....................................................................14 9.7叠环单剪试验....................................................................14 9.8共振柱试验......................................................................15 9.9不固结不排水静三轴试验..........................................................16 9.10固结不排水静三轴试验...........................................................16 9.11固结排水静三轴试验.............................................................16 9.12固结不排水动三轴试验...........................................................16 9.13弯曲元试验.....................................................................16 10软土海床灾害隐患识别与预警.........................................................17 10.1一般规定..............