乌鲁木齐市头屯河区二号台地边坡临界坡角研究
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摘要
基于对乌鲁木齐市头屯河区二号台地人工开挖边坡及滑塌体的大量现场调查、勘测及边坡岩土体室内试验、典型边坡稳定性分析计算,得出不同岩土体、坡面形态与边坡稳定性之间的关系:滑塌堆积体体积大、一般上部为凹坡、砾石含量高、砂含量低则坡体相对稳定,现场测得这类滑塌体临界坡角约36°;砂砾石坡体表现为崩塌破坏,滑塌体含砂量越高越容易垮塌、临界坡角约28°～32°;边坡露头底部强风化泥质砂岩差异风化明显,细砾及砂含量高则易垮塌;细粉砂及含钙质结核的粉土区低缓坡基本稳定,而高陡边坡先期以蠕动变形为主,后期趋于垮塌;滑塌体临界坡角为28°～36°,且随着滑塌体临界坡角的增大,边坡稳定性系数有所提高。
This paper is based on a large number of investigations and surveys on the slopes and slumps on the No.2 platform in the Toutun District of Urumqi City,as well as the tests of soil and the analysis and calculation of typical slope stability.The relationship between body and slope morphology and slope stability:the volume of the collapsed deposit is large,the upper part is concave slope,the gravel content is high,and the sand content is relatively stable,the slope is relatively stable,this slope angle is about 36°;the slope of the gravel is collapsed,and the sand content of the landslide is more likely to collapse,and the critical slope angle is about 28°～32°;the weathering of the strong weathered argillaceous sand at the bottom of the slope outcrop is obvious.Fine gravel and high sand content are easy to collapse;fine silt and calcareous nodule silt area is basically stable,while high-steep slope is mainly creeping deformation in the early stage,and tends to collapse in the later stage;critical slope angle of sliding between 28° and 36°,and with the increase of the critical slope angle of the landslide,the stability coefficient of the slope is improved.
This paper is based on a large number of investigations and surveys on the slopes and slumps on the No.2 platform in the Toutun District of Urumqi City,as well as the tests of soil and the analysis and calculation of typical slope stability.The relationship between body and slope morphology and slope stability:the volume of the collapsed deposit is large,the upper part is concave slope,the gravel content is high,and the sand content is relatively stable,the slope is relatively stable,this slope angle is about 36°;the slope of the gravel is collapsed,and the sand content of the landslide is more likely to collapse,and the critical slope angle is about 28°～32°;the weathering of the strong weathered argillaceous sand at the bottom of the slope outcrop is obvious.Fine gravel and high sand content are easy to collapse;fine silt and calcareous nodule silt area is basically stable,while high-steep slope is mainly creeping deformation in the early stage,and tends to collapse in the later stage;critical slope angle of sliding between 28° and 36°,and with the increase of the critical slope angle of the landslide,the stability coefficient of the slope is improved.
引文
[1]张科,杨红宣,范文臣.基于溶洞随机模型的岩质边坡稳定性评估研究[J].地下空间与工程学报,2018,14(5):1381-1386.
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[5]马淑芝,刘小浪,席人双,王哲.开挖对顺向岩质高边坡稳定性影响及锚索加固效果分析[J].地球科学与环境学报,2018,40(5):637-644
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[7]王鑫,许万忠,罗丹.基于MIDAS/NX的二元结构边坡稳定性分析及加固设计[J].地质灾害与环境保护,2018,(3):87-93.
[8]丁参军,张林洪,于国荣,等.边坡稳定性分析方法研究现状与趋势[J].水电能源科学,2011,29(08):112-114+212.
[9]彭亚捷.道路边坡稳定性分析及治理设计[J].江西建材,2018(10):90-92.
[10]张新,吴彬,彭亮.新疆某水电站厂房后岩石高边坡稳定性分析[J].岩土工程界,2009,12(08):42-47.
[11]GB50330-2013.建筑边坡工程技术规范[S].北京:中国建筑工业出版社,2013.
[2]张云龙,周刘光,王静,吴春利,吕翔.冻融对粉砂土力学特性及路堤边坡稳定性影响[J].吉林大学学报(工学版):1-8.
[3]赵炼恒,曹景源,唐高朋,等.基于双强度折减策略的边坡稳定性分析方法探讨[J].岩土力学,2014,35(10):2977-2984.
[4]唐栋,李典庆,周创兵,等.考虑前期降雨过程的边坡稳定性分析[J].岩土力学,2013,34(11):3239-3248.
[5]马淑芝,刘小浪,席人双,王哲.开挖对顺向岩质高边坡稳定性影响及锚索加固效果分析[J].地球科学与环境学报,2018,40(5):637-644
[6]王玉平,曾志强,潘树林.边坡稳定性分析方法综述[J].西华大学学报(自然科学版),2012,31(2):101-105.
[7]王鑫,许万忠,罗丹.基于MIDAS/NX的二元结构边坡稳定性分析及加固设计[J].地质灾害与环境保护,2018,(3):87-93.
[8]丁参军,张林洪,于国荣,等.边坡稳定性分析方法研究现状与趋势[J].水电能源科学,2011,29(08):112-114+212.
[9]彭亚捷.道路边坡稳定性分析及治理设计[J].江西建材,2018(10):90-92.
[10]张新,吴彬,彭亮.新疆某水电站厂房后岩石高边坡稳定性分析[J].岩土工程界,2009,12(08):42-47.
[11]GB50330-2013.建筑边坡工程技术规范[S].北京:中国建筑工业出版社,2013.