爆炸挤淤置换法在深厚淤泥地基海堤工程中的应用  

The Application of Explosive Compaction and Silt Replacement Method in Deep Silt Foundation Seawall Projects

作　　者：黄朝煊 HUANG Chao-xuan(Zhejiang Design Institute of Water Conservancy and Hydroelectric Power,Hangzhou 310002,China)

机构地区：[1]浙江省水利水电勘测设计院,杭州310002

出　　处：《中国农村水利水电》2018年第9期157-160,165,共5页China Rural Water and Hydropower

基　　金：浙江省基础公益研究计划项目(LGF18E090004);浙江省水利厅科技计划项目(RC1701);浙江省水利水电勘测设计院科标业项目资助(B1609;B1803)

摘　　要：对爆炸挤淤置换法处理海堤淤泥地基技术进行介绍,结合相关技术规程对爆炸挤淤置换法技术特点、施工方式等进行说明,认为爆炸挤淤置换法具有处理地基置换深度深、范围大以及施工进度快等显著优势。根据土力学理论,给出了自重挤淤深度D_0和悬浮式结构置换深度D的理论计算式。计算结果表明所提公式的计算值与实测值基本一致。最后以漩门三期围垦工程为例,对爆炸挤淤置换法进行分析,并通过相关钻探进行对比验证,结果表明实际施工成形断面与设计断面基本一致;由于受结构性淤泥软土灵敏性的影响,其爆炸法处理后的淤泥土抗剪强度指标一般折减0.8~0.9倍。By analying and explaining the silt foundation of the sea dike with the method of the explosive compaction and sedimentation substitution,this paper explains the technical features and construction methods of the explosion squeeze and silt substitution method,and considers that the method of explosive compaction and sedimentation has the advantages of treating deep depth,large scope and fast construction progress. According to the theory of soil mechanics,the theoretical formulas of the depth D_0 and the displacement depth d of the suspended structure are given. Finally,for example,the three reclamation projects of the swirl gate in this paper,the method of explosive compaction and replacement is introduced in detail,and the correlation radar geophysical prospecting is used to verify that the actual construction section is in accordance with the design section,and the shear strength index of the silt soil after the explosion treatment is generally reduced 0.8 ～ 0.9 times.

关 键 词：海堤工程 爆炸挤淤置换法 深厚淤泥地基 悬浮式结构 置换深度 

分 类 号：TV52[水利工程—水利水电工程]