HEC固化土施工技术参数对其抗压强度的影响  

Research on technical parameters in construction of HEC stabilizer

作　　者：杜向琴[1] 娄宗科[1] 闫宁霞[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《西北农林科技大学学报（自然科学版）》2007年第9期226-228,234,共4页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家"863"节水重大专项(2002AA2Z4211);西北农林科技大学科研专项(042M075)

摘　　要：为了获得固化土施工技术参数对其力学性能的影响规律,通过不同条件下的抗压强度试验和击实试验,研究了固化剂掺入比（固化剂与土体质量比）、压实系数、养护方式对固化土抗压强度的影响,测定了不同条件下固化土的最大干密度和最优含水量。结果表明,固化剂掺入比为1∶8时,固化土最大干密度最高,达1.78 g/cm3;固化土抗压强度随固化剂掺入比的增大而增加,固化剂掺入比超过1∶8后,压实系数为0.95时,固化土抗压强度增幅明显降低;压实系数是影响固化土抗压强度的主要因素,其取值宜为0.95~1.0;养护方式也是影响固化土抗压强度的重要因素,适合的养护方式为塑料薄膜覆盖28 d。To obtain the effect laws of technical parameters of construction of HEC stabilizer on physical properties of stabilized soil, through compressive test and compaction test, the relation of HEC-stabilizer mixing ratio ,compressive coefficient, curing method and compressive strength of stabilized soil are respectively studied in this paper,and the maximum dry density and optimal water content are also determined. The results show that the maximum dry density reaches its maximum vaule 1.78 g/cm^3 when HEC-stabilizer mixing ratio is 1 ： 8;compressive strength of stabilized soil increases as mixing ratio does; when mixing ratio reaches more than 1 ：8 and compressive coefficient is 0.95, the increasing range of compressive strength reduces evidently; compressive coefficient is one of the main factors influencing compressive strength, its feasible value is 0.95~1.0;curing method also vitally affects compressive strength of stabilized soil,and the fittest curing method is covering plastical membrane curing 28 days.

关 键 词：HEC 固化土 固化剂掺入比 压实系数 养护方式 

分 类 号：TV443[水利工程—水工结构工程]