带肋排水板-真空预压处理工程废泥浆试验研究  

Experimental Study on Waste Construction Slurry Treated with Rib-Prefabricated Horizontal Drains by Vacuum Preloading Methods

作　　者：蔡瑛[1] 钟颖炘 曾芳金[2] 曹宇 张世祥 李校兵[1] 谢忠武 符洪涛[1] 叶舒祥 李淑芳 CAI Ying;ZHONG Yingxin;ZENG Fangjin;CAO Yu;ZHANG Shixiang;LI Jiaobing;XIE Zhongwu;FU Hongtao;YE Shuxiang;LI Shufang(School of Civil Engineering and Architecture,Wenzhou University,Wenzhou 325035,China;School of Civil Engineering and Surveying and Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341411,China;China Railway 16th Bureau Group Co.,Ltd.,Beijing 100018,China;Wenzhou Education Infrastructure Center,Wenzhou 325000,China)

机构地区：[1]温州大学建筑工程学院,浙江温州325035 [2]江西理工大学土木与测绘工程学院,江西赣州341411 [3]中铁十六局集团有限公司,北京100018 [4]温州市教育基建中心,浙江温州325000

出　　处：《工业建筑》2024年第12期221-228,共8页Industrial Construction

基　　金：国家自然科学基金项目(52178348,52178350);浙江省自然科学基金项目(LY20E080029);温州市科技项目(S20210004)。

摘　　要：传统真空预压法处理工程废弃泥浆存在排水板易淤堵、变形以及真空衰减等问题。基于此,提出了一种带肋排水板真空预压处理工程废浆的方法。通过5组室内真空预压模型试验,对加固过程中试验模型的孔隙水压力、排水量、真空度以及土层表面沉降进行监测,并对排水板滤膜进行电子显微镜扫描,分析不同肋宽比下带肋排水板对工程废浆固结的影响。试验结果表明:带肋排水板在泥浆真空固结过程中能提高真空的传递效率、削弱排水板滤膜淤堵;0.5的肋宽比使带肋排水板性能达到最佳,处理后土体平均含水率和十字板剪切强度分别为38.51%和32.38 kPa,有效地提高了加固后土体的整体强度。通过对排水板滤膜的微观结构的分析,发现肋宽比直接影响同宽度下带肋排水板的淤堵情况,0.5的肋宽比能将带肋排水板的排水性能发挥至最佳。The traditional vacuum preloading method used to treat waste construction slurry.As there were some problems involving clogging and deformation of drain boards and vacuum attenuation in the traditional vacuum preloading treatment,a method of vacuum preloading with Rib-prefabricated horizontal drains(RPHD)was proposed to treat waste construction slurry.Five groups of indoor vacuum preloading model tests were performed to measure the pore water pressure,water discharge,vacuum degree and surface settlement of soil specimens during the reinforcement processes.Simultaneously,the filter membranes of drainage boards were scanned with electron microscopes to analyze the effect of rib width ratios of RPHD on consolidation of waste construction slurry.The test results indicated that RPHD could improve the vacuum transfer efficiency and weaken the clogging of filter membranes of drainage boards during consolidation of waste construction slurry by the vacuum preloading method.A rib width ratio of 0.5 for ribbed drainage boards achieved the optimal performance of water discharge.The mean moisture content and the vane shear strength of treated soil specimens were respectively 38.51%and 32.38 kPa after reinforcement,which effectively improved the strength of reinforced soil.Analyzing the microstructure of filter membranes of drainage boards,it was found that the rib width ratio directly related the clogging of the ribbed drainage boards in the same width of drainage boards,and rib width ratio of 0.5 could fully play the drainage performance of RPHD.

关 键 词：真空预压 带肋排水板 肋宽比 工程废浆 淤堵效应 

分 类 号：TU472.33[建筑科学—结构工程]