新近吹填淤泥形成超软土地基的加固处理方法.pdf
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第 48 卷 第 5 期 港 工 技 术 Vol. 48 No.5
2011 年 10 月 总第 202 期 Port Engineering Technology Oct.2011 Total 202
新近吹填淤泥形成超软土地基的加固处理方法
冯会芳
(中交天津港湾工程设计院有限公司,天津 300461)
摘要:针对某港区新近吹填淤泥形成的超软土地基,在施工机具和设备均无法进入的情况下,先采用直排式真空预压法在
场地表面形成具有一定承载力的硬层,再按常规真空预压法进行二次处理,采用这种新方法处理后的软土地基承载力可
提高到 80 kPa,地基加固处理的效果显著。
关键词:新近吹填淤泥;超软土地基;直排式真空预压法;二次真空预压
中图分类号:U655.544.4 文献标志码:B 文章编号:1004-9592(2011)05-0059-02
Reinforcement Method of Ultra-soft Foundation Formed by Fresh Dredger
Filled Mud
Feng Huifang
(CCCC Tianjin Port Engineering Design and Consulting Co., Ltd., Tianjin 300461, China)
Abstract: Since the ultra-soft foundation is formed by fresh dredger filled mud within some port area, no
construction equipments could enter or be used in the area. In that case, the following foundation treatment
method is adopted in the project, i.e. straight-line vacuum preloading is carried out firstly so as to form a hard
layer whose bearing capacity is acceptable, normal vacuum preloading is applied for the secondary foundation
reinforcement. As the new method is used, the bearing capacity of the ultra-soft foundation can be raised up to
80 kPa, and the foundation reinforcement effect is remarkable.
Key words: fresh dredger filled mud; ultra-soft foundation; straight-line vacuum preloading; secondary
vacuum preloading
随着我国沿海港口和临港工业园区的建设用地 近吹填土的表面加速形成硬壳,为各种机具、设备进
需求急剧增长,土地资源不足的矛盾日渐突出,在沿 场施工创造条件;二次处理时可按常规真空预压法对
海地区涌现出大量的围填海造陆工程,这类工程大多 深层地基进行加固。目前天津滨海新区的围海造陆工
是将疏浚后的海底淤泥利用水力吹填工艺吹送到近 程较多,包括天津港南港工业区 178 km2 的围海造陆
岸的纳泥区而形成陆域,再对纳泥区的软弱淤泥进行 项目,临港产业区、东疆港区、泰达临海新城等区域也
加固处理成为可供开发建设的场地。实践证明真空预
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