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李明东,潘耀森,郎钞棚,等. 真空预压法处理吹填超软地基10a进展及展望[J]. 科学技术与工程, 2020, 20(1): 15-22.
李明东,panyaosen,et al.Review and outlook of improvement of hydraulic fill via vacuum preloading in the past ten years[J].Science Technology and Engineering,2020,20(1):15-22.
真空预压法处理吹填超软地基10a进展及展望
Review and outlook of improvement of hydraulic fill via vacuum preloading in the past ten years
投稿时间:2019-03-25  修订日期:2019-09-21
DOI:
中文关键词:  吹填土  超软地基  真空预压  地基处理  排水体  联合预压
英文关键词:hydraulic fill  soft ground  vacuum preloading  ground improvement  drainage  combined preloading
基金项目:国家自然科学基金资助(51869001,51609093)
           
作者单位
李明东 东华理工大学
潘耀森 东华理工大学
郎钞棚 东华理工大学
戴仁辉 东华理工大学
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中文摘要:
      近十年来,大量围填海等吹填造陆工程相继开展,真空预压是处理吹填超软地基的主要方法。由于吹填超软地基的性质比一般软基更差,真空预压处理中遇到了一系列新问题,研究和解决这些新问题推动了技术的持续发展。总结了真空预压法处理吹填超软地基的进展,总结了各项改进措施,及其对加固效果、经济、环境、工期的影响。超软地基表面施工用泡沫浮桥法搭建作业面的成本仅为传统真空预压成本的58.8%、对相邻排水体采取异步真空吸水预压,排水量较传统真空预压法提高了29.3%;采用沉降自适应排水通道连接排水体,降低了排水体的弯折。真空堆载联合预压最终沉降量比传统真空预压增加30%、电渗用在真空预压最后阶段,含水率下降了25%,能耗占真空预压能耗的8%、加入SS-331H试剂真空化学联合预压使抗剪强度增加了4~5倍。建议完善相关技术规程,便于文中方法推广应用;研发耐腐蚀的电渗阳极,防淤堵排水板,降低成本;对其他如S320等试剂进行研究,提升土体性能的同时,充分考虑对环境的影响。
英文摘要:
      In the past decade, a large number of land reclamation projects have been carried out, and vacuum preloading is the main method to deal with the reclamation of ultra-soft foundation. Since the properties of hydraulic fill are even worse than that of general soft ground, a series of new problems have been encountered in vacuum preloading treatment and the research and solution of these new problems have promoted continuous development of technology. This paper firstly summarizes the progress of vacuum preloading method in treating overfilled soft foundation, and then presents various improvement measures, and their impacts on the reinforcement effect, economy, environment and construction period. The cost of constructing the working surface with foam pontoon bridge method for the construction of ultra-soft foundation surface is only 58.8% of the cost of traditional vacuum preloading. And asynchronous vacuum preloading is applied to adjacent drainage bodies, so that the drainage volume was increased by 29.3% compared with the traditional vacuum preloading method. What’s more, the settlement adaptive drainage channel is adopted to connect the drainage water body, which reducing the bending of the drainage water body. In addition, in the final stage of vacuum preloading, the water content decreased by 25%, and the energy consumption accounted for 8% of the energy consumption of vacuum preloading. And with the addition of SS-331H reagent vacuum chemical combined preloading, the shear strength increased by 4-5 times. This thesis puts forward some suggests. First, relevant technical regulations requires further perfection to facilitate the popularization and application of the method; second, research corrosion-resistant electroosmotic anode and anti-blocking drainage board to reduce costs; third, other reagents, such as S320, are supposed to be studied to improve soil properties while taking full account of the impact on the environment.
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