【摘 要】
：
通过PX固化剂对库布其沙漠风沙土进行加固.对不同含水状态、不同固化剂掺量、不同养护龄期下固化风沙土的强度特性进行试验研究.试验结果表明,不同含水状态下风沙土的强度特
论文部分内容阅读
通过PX固化剂对库布其沙漠风沙土进行加固.对不同含水状态、不同固化剂掺量、不同养护龄期下固化风沙土的强度特性进行试验研究.试验结果表明,不同含水状态下风沙土的强度特性是不同的,相同固化剂掺量、相同养护龄期时,固化风沙土在最优含水率下的无侧限抗压强度远远大于饱和含水率下的强度.相同含水状态下固化风沙土无侧限抗压强度随固化剂掺量增加、养护龄期延长而增大,且在养护初期强度增长较快,当固化剂掺量为8 %、养护龄期为28 d时,固化风沙土强度满足国际上对固沙强度的要求.最优含水率下固化风沙土抗剪强度较风沙土有较大提高;当固化剂掺量为8 %时,固化风沙土凝聚力和内摩擦角均达到最大,此时固化风沙土抗剪强度约为风沙土的1.8倍.进而,通过扫描电镜对风沙土固化前后微观结构变化进行试验研究.研究结果表明,风沙土中掺入PX固化剂后,颗粒间由原来的弱连接变为胶结连接,解释了固化风沙土较风沙土强度得以提高、稳定性得以改善的内在原因.
其他文献
In plants,non-coding small RNAs play a vital role in plant development and stress responses.To explore the possible role of non-coding small RNAs in the regulat
一定可接受的风险水平上,实现基金单位持有者投资价值最大化是房地产投资信托(REITs)应当追求的最关键目标。通过从盈利水平和风险程度两个方面,对新加坡7家业务类型各异且布
Background Identification of potential serum biomarkers of osteosarcoma to aid in its early diagnosis and in the discovery of possible therapeutic targets is an
Three oxidation processes of UV-Fe3+(EDTA)/H2O2 (UV:ultraviolet light; EDTA:ethylenediaminetetraacetic acid),UV-Fe3+/H2O2 and Fe3+/H2O2 were simultaneously inve
针对PDC钻头在钻复杂硬地层中容易出现崩齿、碎裂、剥蚀脱层和过度磨损等问题,本文采用自主研发的PDC钻凿/磨铣特性检测试验装置对五种φ19 PDC片、五种φ16 PDC片和七种φ13
Lymph node status is a key prognostic factor in penile squamous cell carcinoma.Recently,growing evidence indicates a multimodality approach consisting of neoadj
Background The aim of this research was to determine the efficacy of combination therapy using an alginate dressing and mouse epidermal growth factor (mEGF) on
Background Tetralogy of Fallot (TOF) is the most common malformation of children with an incidence of approximately 10％ of congenital heart disease patients.Ther
Objective:Although the development of trastuzumab has improved the outlook for women with human epidermal growth factor receptor 2 (HER2)-positive breast cancer
Background The radial approach has been increasingly used as an alternative to femoral access.And more procedures using repeated transradial coronary interventi