天津滨海新区吹填造陆浅层超软土加固技术研发及应用.PDF

第 30 卷 第 5 期 岩石力学与工程学报 Vol.30 No.5 2011 年 5 月 Chinese Journal of Rock Mechanics and Engineering May ，2011 天津滨海新区吹填造陆浅层超软土 加固技术研发及应用 董志良，张功新，周 琦，罗 彦，邱青长，李 燕 ( 中交四航工程研究院有限公司，广东 广州 510230) 摘要：对于新近吹填淤泥形成的超软土地基，常规软基处理方法难以取得理想加固效果或根本无法实施。为适应 天津滨海新区大面积吹填造陆的需要，针对当地吹填超软土的工程特性，研发出一种适合于天津滨海新区的浅层 超软土加固技术，详细介绍该技术的加固目的、技术方案、工艺要点及其工程应用情况。依托天津滨海新区中船 重工造修船基地造船 B 区软基处理工程，结合各种监测检测成果，评价其加固效果并分析其中原因，同时指出该 技术尚存在的问题。工程实践表明，经过该技术处理的吹填淤泥，浅层土体含水率大幅降低，物理力学性质明显 改善，表层形成一层具有一定承载力的硬壳层，完全可以满足后续吹填砂垫层和机械插板的施工要求，工程应用 成功，同时该技术具有成本低、工期短、工艺简单等特点，值得推广。 关键词：土力学；吹填造陆；吹填淤泥；浅层超软土加固；真空预压；无砂垫层排水系统；硬壳层 中图分类号：TU 43 文献标识码：A 文章编号：1000 –6915(2011)05 –1073 –08 RESEARCH AND APPLICATION OF IMPROVEMENT TECHNOLOGY OF SHALLOW ULTRA-SOFT SOIL FORMED BY HYDRAULIC RECLAMATION IN TIANJIN BINHAI NEW AREA DONG Zhiliang ，ZHANG Gongxin ，ZHOU Qi ，LUO Yan ，QIU Qingchang，LI Yan (CCCC Fourth Harbor Engineering Institute Co.，Ltd .，Guangzhou，Guangdong 510230，China) Abstract ：Conventional improvement methods of soft ground are ineffective or unpractial for ultra-soft soil formed by newly hydraulic mud fill. To meet the requirements of large-area reclamation by pumping filling in Tianjin Binhai New Area，a new improvement technology of shallow ultra-soft soil was proposed in connection with its engineering characteristics. It was introduced including the purpose ，technical program ，process points and application. Relying on a project in Tianjin Binhai New Area，the improvement effect was evaluated and the reasons and problems were analyzed with monitoring test results. Engineering practice sh