应用复式真空管井法加固吹填淤泥的试验研究

Experimental study on application of double vacuum tube wells in reinforcing reclamation sludge

针对传统真空预压法在加固高含水量吹填土时存在的诸如易形成泥膜阻碍排水、排水板易折断等缺点,提出了复式真空管井法加固技术。在相同抽真空条件下的室内对比试验成果表明,经该法加固后的软土十字板强度、含水量两个指标均明显优于传统真空预压法。与传统真空预压法相比,复式真空管井法具有负压损失小、排水效率高、加固时间短等优势。主要介绍了该方法的加固机理和具体管井的设计细节,具有较高参考价值。

Aining to the disadvantages of conventional vacuun preloading nethod in reinforcing high water dredging fill,such as easily - forning of sludge filn hindering water drainage and easily - broken of draining board,a new reinforcenent technology using double vacuun tube wells has been proposed. Through indoor test,it shows that under the sane vacuun conditions,the in-dexes of vane shear strength and water content in consolidation by the new nethod are significantly superior to conventional vacu-un preloading nethod. Conpared with traditional vacuun preloading nethod,the double vacuun tube wells has snaller negative pressure loss,high efficiency of drainage,less reinforcenent duration etc. The reinforcing nechanisn and design detail of vacu-un tube of the presented nethod are presented.