秸秆排水板室内降解试验及现场应用  

Laboratory degradation test and field application of straw drainage board

作　　者：袁威 邓永锋[1] 陈小兵 苏银强 李建东 杨倩 Yuan Wei;Deng Yongfeng;Chen Xiaobing;Su Yinqiang;Li Jiandong;Yang Qian(School of Transportation,Southeast University,Nanjing 211189,China;Zhuhai Hegang Expressway Co.,Ltd.,Zhuhai 519000,China)

机构地区：[1]东南大学交通学院,南京211189 [2]珠海鹤港高速公路有限公司,珠海519000

出　　处：《东南大学学报（自然科学版）》2023年第3期402-409,共8页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51878519).

摘　　要：为了探究秸秆排水板在软土地基处理中使用的可行性,分别对秸秆排水板和塑料排水板进行了室内降解试验、现场试验和经济性分析,对2种排水板进行了纵向通水量测试、抗拉强度测试、细菌种群测序、现场地基沉降和孔隙水压力监测.试验结果表明:秸秆排水板的通水量小于传统的塑料排水板,2种排水板的通水量均随围压和时间的增加而降低,但都满足规范要求;珠海海相软土中富含Prevotella、Rikenella和Ruminococcus等细菌,这些细菌是主要的纤维降解细菌,为秸秆排水板的降解提供了有利环境;秸秆排水板与塑料排水板真空预压现场试验中具有大致相同的加固效果,但成本低于塑料排水板.因此,秸秆排水板不仅具有良好的工程性能,还可以节约成本,保护环境,满足低碳、绿色、节能、环保的建设理念需求.To explore the viability of utilizing straw drainage boards for foundation treatment,laboratory degradation tests,field tests,and economic analyses were conducted on both straw and plastic drainage boards.Various tests including longitudinal discharge capacity,tensile strength,and bacterial population sequencing were conducted.Additionally,on-site monitoring was carried out to measure the foundation settlement and pore water pressure for both types of drainage boards.The experimental results show that the discharge capacity of straw drainage board is lower than that of traditional plastic drainage board.However,both drainage boards meet the required specifications,despite a decrease in discharge capacity with increased confine pressure and time.The Zhuhai marine soft soil is abundant in bacteria such as Prevotella,Rikenella,and Ruminococcus,which are the primary fiber-degrading bacteria.These bacteria create an ideal environment for the degradation of straw drainage board.Straw drainage board boasts excellent engineering performance,while also being cost-effective,environment-friendly,and in line with the“low-carbon,green,energy-saving,and environmental protection”construction concept.

关 键 词：可降解排水板 真空预压 地基处理 沉降 

分 类 号：TU443[建筑科学—岩土工程]