就地固化土体路用力学参数研究
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摘要
针对就地固化土路基,将废弃的淤泥土就地固化后用作路基填料,达到了废弃资源的合理利用,对实际工程具有重要意义.通过室内试验对就地固化土的压实特性和路用力学参数进行研究,发现水泥和矿渣微粉可以有效改良河道淤泥土,其中11%的固化剂总配比,满足规范中对上路床的强度要求;使用室内承载板法发现,11%固化剂掺量能够满足沥青路面对土基回弹模量的要求;随着固化剂总配比的增加,试样的CBR值基本呈线性增加,可以用一次多项式较好的拟合;随着击实前闷料时间的增长,击实后固化土的强度增大.
In this paper,we study the in-situ stabilized soil of subgrade,use the abandoned silt soil solidifiy in suit as the roadbed filler,and make the waste resources to be reasonable utilization. This method has a great significance to practical engineering. Through the indoor experiment,we study the road mechanical parameters of stabilized soil in-situ.We find that cement and slag powder can improve the river silt soil effectively. And 11% in the curing agent of the total meets the specification requirement which towards the intensity of the road bed. We use the indoor bearing plate method to determine the modulus of resilience of 11% solidified soil which meets the request of standard.Through the indoor experiment study,it is found that with the increasing of curing agent ratio of the total,CBR value of the sample is increased linearly. We can use a linear polynomial to fit better. And with increasing of stuffing time,CBR value of the sample is increased.
In this paper,we study the in-situ stabilized soil of subgrade,use the abandoned silt soil solidifiy in suit as the roadbed filler,and make the waste resources to be reasonable utilization. This method has a great significance to practical engineering. Through the indoor experiment,we study the road mechanical parameters of stabilized soil in-situ.We find that cement and slag powder can improve the river silt soil effectively. And 11% in the curing agent of the total meets the specification requirement which towards the intensity of the road bed. We use the indoor bearing plate method to determine the modulus of resilience of 11% solidified soil which meets the request of standard.Through the indoor experiment study,it is found that with the increasing of curing agent ratio of the total,CBR value of the sample is increased linearly. We can use a linear polynomial to fit better. And with increasing of stuffing time,CBR value of the sample is increased.
引文
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[8]丁建文,张帅,洪振舜,等.水泥-磷石膏双掺加固处理高含水率疏浚淤泥试验研究[J].岩土力学,2010,31(9):2817-2823.
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[15]王少君.如何提高石灰稳定土路面基层的强度[J].山西建筑,2004,30(4):110-111.
[16]朱伟,刘汉龙,高玉峰,等.工程废弃土的再生资源利用技术[J].再生资源研究,2001,19(6):32-35.
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[18]董玉文,张伯平.黄土灰土的击实性与抗剪性试验研究[J].西北水资源与水工程,2001,12(1):62-64.
[19]朱志铎,刘松玉. SEU-2型固化剂稳定粉质土路基的试验研究[J].公路,2007,7(2):177-182.
[2]王颖,陈永辉,程潇,等.就地固化技术处理道路浅层软基的试验研究[J].上海建设科技,2016,17(2):29-32.
[3]王颖,李斌,陈永辉,等.强力搅拌头就地浅层固化地基承载特性研究[J].河北工程大学学报(自然科学版),2016,24(2):39-44.
[4] EL-RAWI N M,AWAD A A A. Permeability of lime stabilized soils[J]. Transp Engrg J,2014,107(1):25-35.
[5]朱伟,张春雷,高玉峰,等.海洋疏浚泥固化处理土基本力学性质研究[J].浙江大学学报,2005,39(10):1562-1565.
[6]冯志超,朱伟,张春雷,等.黏粒含量对固化淤泥力学性质的影响[J].岩石力学与工程学报,2007,26(5):3053-3057.
[7]范昭平,朱伟,张春雷,等.有机质含量对淤泥固化效果影响的试验研究[J].岩土力学,2005,26(8):1327-1332.
[8]丁建文,张帅,洪振舜,等.水泥-磷石膏双掺加固处理高含水率疏浚淤泥试验研究[J].岩土力学,2010,31(9):2817-2823.
[9]张心平,苏海涛,彭红涛,等.派酶固化土壤的无侧限强度试验研究[J].公路,2008,6(2):171-172.
[10]李国栋.派酶加固土路用性能试验研究[D].哈尔滨:东北林业大学,2009.
[11]杨廷玉,周宇,赵莹莹,等.水泥固化土强度特性试验研究[J].黑龙江工程学院学报,2012,26(3):6-9.
[12]陈洁.吹填土固化结构强度的再形成试验研究[D].杭州:浙江大学,2013.
[13]杨广庆.高速铁路路基设计与施工[M].北京:中国铁道出版社,1999.
[14]曹自强,肖永贵,阙建荣.全风化花岗岩路基采取石灰改良土处理[J].湖南交通科技,2001,27(4):21-23.
[15]王少君.如何提高石灰稳定土路面基层的强度[J].山西建筑,2004,30(4):110-111.
[16]朱伟,刘汉龙,高玉峰,等.工程废弃土的再生资源利用技术[J].再生资源研究,2001,19(6):32-35.
[17] ZHU W,CHIU C F,ZHANG C L,et al. Effrect of humic acid on the behavior of solidifield dredged material[J]. Canadian Geotechnical Journal,2009,46(9):3333-3341.
[18]董玉文,张伯平.黄土灰土的击实性与抗剪性试验研究[J].西北水资源与水工程,2001,12(1):62-64.
[19]朱志铎,刘松玉. SEU-2型固化剂稳定粉质土路基的试验研究[J].公路,2007,7(2):177-182.