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齐嘉炜,魏海涛,何军杰,赵文博.优化分级真空预压法处理吹填土试验研究[J].河北工程大学自然版,2021,38(2):44-52
优化分级真空预压法处理吹填土试验研究
Experimental Study on Dredger Fill with Optimized Graded Vacuum Preloading Method
投稿时间:2020-11-03  
DOI:10.3969/j.issn.1673-9469.2021.02.008
中文关键词:  优化分级真空预压  模型试验  颗粒运移  含水率
英文关键词:optimized vacuum preloading  model experiment  particle movement  moisture content
基金项目:西藏自治区科学技术厅青年项目(XZ202001ZR0025G)
作者单位
齐嘉炜 中航勘察设计研究院有限公司, 北京 100086 
魏海涛 中航勘察设计研究院有限公司, 北京 100086 
何军杰 西藏农牧学院, 西藏 林芝 860000 
赵文博 中航勘察设计研究院有限公司, 北京 100086 
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中文摘要:
      通过室内模型试验对常规真空预压法、分级真空预压法和优化分级真空预压法的加固效果进行了对比研究,通过对加固过程中土体沉降量、排水量和真空度等变化规律及加固前后土体的含水率、颗粒粒径分布曲线指标对比分析,得到真空度传递规律,并对不同真空负压预压机理进行分析,指出优化分级真空预压法的处理效果优于其它两种工法,且在第一阶段(-20 kPa)后直接施加较大的真空吸力(-80 kPa)不会导致排水板的进一步淤堵并且可以提高排水效率。
英文摘要:
      A comparative study of the reinforcement effect of conventional vacuum preloading method, graded vacuum preloading method and optimized graded vacuum preloading method is carried out through indoor model test. Through the comparative analysis of the change law of soil settlement, drainage and vacuum degree during the reinforcement process, and the comparison of the soil moisture content and particle size distribution curve indicators before and after reinforcement, the vacuum degree transfer law is worked out and the mechanism of different vacuum negative pressure strengths are analyzed. The results show that the optimized vacuum preloading method is better than the other two, and directly applying a large vacuum suction force (-80 kPa) after the first stage (-20 kPa) will not cause further blockage of the drainage plate and can improve drainage efficiency.
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