大连近海岩溶发育特点及基础工程设计  

Karst Development Features and Foundation Engineering Design in Offshore of Dalian City

作　　者：刘林[1] 刘晓鹏[1] 王玉岭[1] 刘连生[1] 

机构地区：[1]中交水运规划设计院有限公司,北京100007

出　　处：《土工基础》2015年第4期65-68,共4页Soil Engineering and Foundation

摘　　要：工程建设实践表明,大连近海岩溶以沟槽洞隙为主,垂向层状发育明显,构造地质挤压破碎和泥灰岩岩性是岩溶发育的主要原因。桩基设计要保证桩端底部洞隙顶板厚度,根据洞隙大小制定合理的灌注桩成孔施工方案。重力式基础底部要保证合适的基床厚度,清除溶芽露头以防应力集中,加强基槽清淤和基床夯实。The engineering developments in the nearshore Dalian area indicate that the karst conditions of nearshore area consist of rock pinnacles and fissure like cavities with the dipping in the vertical directions.The tectonic folding and alternating of mudstone are the main contributions to the karst rock characteristics.In the rock-socketed pile design practice,appropriate thickness above the karst cavern with different dimensions is critical to the safety.Gravity foundations require adequate cushion thickness and the rock pinnacles should be removed to minimize the stress concentration.Soft soils in the rock pinnacles need to be removed and appropriate compaction is necessary for the foundation construction.

关 键 词：近海 岩溶 基础工程 设计 施工 

分 类 号：P642[天文地球—工程地质学]