摘要
针对真空预压法在固结工程废浆过程中传统水平排水板易出现淤堵与变形的问题,提出了一种带肋排水板真空预压法。通过室内模型试验,对固结过程中的真空度、排水量、孔隙水压力及沉降量进行监测,研究带肋排水板真空预压法对工程废浆的加固效果。结果表明,在排水板用量不变的情况下,采用带肋排水板真空预压法处理工程废浆时能有效缓解淤堵,真空传递效率较高,带肋结构能显著提升排水体的抗变形能力,在固结过程中可提供不同方向的真空吸力,增加土体内部排水通道,降低细土颗粒对排水板的附着作用。经带肋排水板真空预压法处理后,土体的沉降量由80.2 mm提升至108.4 mm,十字板剪切强度最大提高2.2 kPa,固结后土体的整体强度提高,有效地改善了传统真空预压法远处土体加固效果较差的问题。
Aiming at the problems of silting and deformation of drain in the process of consolidation of engineering waste slurry by traditional horizontal vacuum preloading method,a ribbed drain vacuum preloading method is proposed.Through the indoor model test,the vacuum degree,water displacement,pore water pressure and surface settlement during the consolidation process are monitored,and the effect of vacuum preloading with ribbed drain on the reinforcement of engineering waste slurry is preliminarily explored.The test results show that,without changing the amount of drain,the vacuum preloading method of ribbed drain can effectively alleviate the siltation and improve the vacuum transfer efficiency when treating the engineering waste slurry,and its ribbed structure can enhance the deformation resistance of the drain,and may provide vacuum suction in different directions during the consolidation process,improve the drainage channel inside the soil,and reduce the adhesion of fine soil particles to the drain.After vacuum preloading with ribbed drain,the settlement of soil increased from 80.2 mm to 108.4 mm,the vane shear strength increased 2.2 kPa,and the overall strength of soil after consolidation improved,effectively advancing the problem of poor consolidation of remote soil by traditional vacuum preloading.
作者
曾芳金
钟颖炘
符洪涛
王军
李校兵
蔡瑛
ZENG Fangjin;ZHONG Yingxin;FU Hongtao;WANG Jun;LI Jiaobing;CAI Ying(School of Civil and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;School of Civil Engineering and Architecture,Wenzhou University,Wenzhou 325035,Zhejiang,China)
出处
《江西冶金》
2023年第6期516-523,共8页
Jiangxi Metallurgy
基金
国家自然科学基金资助项目(52178348,51878512,52178350)
浙江省自然科学基金资助项目(LY20E080029)
温州市科技资助项目(S20210004)。
关键词
真空预压
带肋排水板
防淤堵
工程废浆
沉降
vacuum preloading
ribbed drain
anti-clogging
engineering waste slurry
settlement
