北京无水砂卵石地层盾构施工碴土改良试验及其应用研究
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- 英文论文题名：Experimental Study on Soil Conditioning for EPB Shield in the Waterless Sandy Pebble Stratum and Its Application
- 论文作者：程盼盼 ; 徐前卫 ; 李谷阳 ; 李晓亮
- 英文论文作者：CHENG Panpan ; XU Qianwei ; LI Guyang ; LI Xiaoliang ; Key Labiratory of Road and Traffic Engineering of Ministry of Education ; Tongji University ; Five Iron Group Electric Service City Link Engineering Co. ; Ltd.
- 年：2016
- 作者机构：同济大学道路与交通工程教育部重点实验室;中铁五局电务城通公司;
- 论文关键词：土压平衡盾构 ; 砂卵石地层 ; 碴土改良 ; 室内试验 ; 施工验证
- 英文论文关键词：EPB shield ; Sandy pebble stratum ; Soil conditioning ; Laboratory test ; Field test
- 会议召开时间：2016-10-24
- 会议录名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会论文集
- 语种：中文
- 分类号：U455.43
- 学会代码：OGTY
- 会议名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会
- 会议地点：中国四川成都
- 主办单位：中国土木工程学会隧道及地下工程分会
- 学会名称：中国土木工程学会
- 页数：8
- 文件大小：1815k
- 原文格式：O
- 会议级别：全国
摘要
碴土改良是盾构在砂卵石地层中掘进必不可少的一项辅助措施。为确保北京地铁天桥-永定门外区间隧道在砂卵石中顺利施工,开展了一系列碴土改良研究。首先,通过分析砂卵石土样的颗粒级配特征,并综合考虑经济性及环保要求,选取泡沫和膨润土为碴土改良剂;随后,为配制出特定性能的改良剂,对改良材料的性能进行了试验研究,最终确定了产生试验所用改良剂的试验条件;再后,以室内坍落度试验为主,在选定膨润土体积添加比为7%的情况下,得出泡沫添加剂最优配比为45%~60%;最后,将室内研究成果应用于实际工程,从现场改良土状态、坍落度值及掘进参数三个方面说明碴土改良取得了较好的效果,从而表明室内试验研究成果具有一定的实用价值,可为类似无水砂卵石地层碴土改良方案制订提供参考。
It is essential to condition the soil when shield tunneling in sandy pebble stratum.The interval tunnel from the Tianqiao Station to the Outside of Yongdingmen Station of Metro line 8 in Beijing city is mainly constructed in sandy pebble stratum.In order to ensure the safety and high efficiency of tunneling,a series of research on soil conditioning was carried out.Firstly,the foam and bentonite slurry were chosen as the soil additives based on comprehensive consideration of soil particle size distribution,construction cost and environment effect;Secondly,the influential factors of the properties of the foam and bentonite slurry were tested,and then the additives with specific properties were produced for the subsequent experiments;Thirdly,through soil slump tests,the optimum addition ratio of the foam was set about 45%to 60%under the condition that the injection ratio of bentonite slurry was 7%;Finally,the laboratory optimization results were applied to the practical engineering and the soil conditioning achieved an ideal result in terms of the muck performance,the value of conditioned soil slump and the tunneling parameters.These research results can provide some reference for soil conditioning in similar engineering.
It is essential to condition the soil when shield tunneling in sandy pebble stratum.The interval tunnel from the Tianqiao Station to the Outside of Yongdingmen Station of Metro line 8 in Beijing city is mainly constructed in sandy pebble stratum.In order to ensure the safety and high efficiency of tunneling,a series of research on soil conditioning was carried out.Firstly,the foam and bentonite slurry were chosen as the soil additives based on comprehensive consideration of soil particle size distribution,construction cost and environment effect;Secondly,the influential factors of the properties of the foam and bentonite slurry were tested,and then the additives with specific properties were produced for the subsequent experiments;Thirdly,through soil slump tests,the optimum addition ratio of the foam was set about 45%to 60%under the condition that the injection ratio of bentonite slurry was 7%;Finally,the laboratory optimization results were applied to the practical engineering and the soil conditioning achieved an ideal result in terms of the muck performance,the value of conditioned soil slump and the tunneling parameters.These research results can provide some reference for soil conditioning in similar engineering.
引文
[1]李培楠,黄德中,黄俊,丁文其.硬塑高黏度地层盾构施工土体改良试验研究[J].同济大学学报(自然科学版),2016,(1):59-66.LI Peinan,HUANG Dezhong,HUANG Jun,DING Wenqi.Experimental research on soil conditions of shield construction in hard plastic high viscosity layer[J].Journal of Tongji University(Natural Science Edition),2016,(1):59-66.
[2]叶新宇,王树英,肖超,等.上软下硬地层碴土改良试验及应用研究[J].现代隧道技术,2015,(6):147-153.YE Xinyu,WANG Shuying,XIAO Chao,and et al.Soil conditioning test for soft upper and hard lower mixed stratum and its application[J].Modern Tunneling Technology,2015,(6):147-153.
[3]李潮.砂卵石地层土压平衡盾构关键参数计算模型研究[D].北京:中国矿业大学,2012.LI Chao.Study on the calculation models of key parameters of the EPB shield machine in sandy cobble ground[D].Beijing:China University of Mining and Technology,2012.
[4]史亚军,郭彩霞,台启民,刘晶晶.无水大粒径卵石层中盾构开挖地层变形规律分析[J].现代隧道技术,2015,(6):77-84.SHI Yajun,GUO Caixia,TAI Qimin,LIU Jingjing.On the ground deformation law of shield tunneling in a waterless large-particle cobble stratum[J].Modern Tunneling Technology,2015,(6):77-84.
[5]姜厚停,龚秋明,杜修力.卵石地层土压平衡盾构施工土体改良试验研究[J].岩土工程学报,2013,(2):284-292.JIANG Houting,GONG Qiuming,DU Xiuli.Experimental study on soil conditioning in cobble layer by use of earth pressure balanced machine[J].Chinese Journal of Geotechnical Engineering,2013,(2):284-292.
[6]江华,张晋勋,苏艺,等.砂卵石地层土压平衡盾构隧道施工土体改良试验研究[J].中国铁道科学,2013,(4):40-45.JIANG Hua,ZHANG Jinxun,SU Yi,and et al.Study on soil conditioning experiments during earth pressure balance shield tunneling in sand gravel strata[J].China Railway Science,2013,(4):40-45.
[7]钟毅,杨龙才,房师涛,张润来.砂卵石地层的土压平衡盾构施工土体改良试验研究[J].华东交通大学学报,2015,(6):44-53.ZHONG Yi,YANG Longcai,FANG Shitao,ZHANG Runlai.Research on soil conditioning of sand pebble layer in EPB tunneling[J].Journal of East China Jiaotong University,2015,(6):44-53.
[8]唐卓华,徐前卫,杨新安,等.富水砂层盾构掘进碴土改良技术[J].现代隧道技术,2016,(1):153-158.TANG Zhuohua,XU Qianwei,YANG Xin'an,and et al.Soil conditioning technology for shield tunneling in a water-rich sandy stratum[J].Modern Tunneling Technology,2016,(1):153-158.
[9]叶新宇.泥质粉砂岩地层土压平衡盾构碴土改良试验研究与应用[D].长沙:中南大学,2014.YE Xinyu.Experimental Study of soil conditioning for earth pressure balance shield in argillaceous siltstone stratum and its application[D].Changsha:Central South University,2014.
[2]叶新宇,王树英,肖超,等.上软下硬地层碴土改良试验及应用研究[J].现代隧道技术,2015,(6):147-153.YE Xinyu,WANG Shuying,XIAO Chao,and et al.Soil conditioning test for soft upper and hard lower mixed stratum and its application[J].Modern Tunneling Technology,2015,(6):147-153.
[3]李潮.砂卵石地层土压平衡盾构关键参数计算模型研究[D].北京:中国矿业大学,2012.LI Chao.Study on the calculation models of key parameters of the EPB shield machine in sandy cobble ground[D].Beijing:China University of Mining and Technology,2012.
[4]史亚军,郭彩霞,台启民,刘晶晶.无水大粒径卵石层中盾构开挖地层变形规律分析[J].现代隧道技术,2015,(6):77-84.SHI Yajun,GUO Caixia,TAI Qimin,LIU Jingjing.On the ground deformation law of shield tunneling in a waterless large-particle cobble stratum[J].Modern Tunneling Technology,2015,(6):77-84.
[5]姜厚停,龚秋明,杜修力.卵石地层土压平衡盾构施工土体改良试验研究[J].岩土工程学报,2013,(2):284-292.JIANG Houting,GONG Qiuming,DU Xiuli.Experimental study on soil conditioning in cobble layer by use of earth pressure balanced machine[J].Chinese Journal of Geotechnical Engineering,2013,(2):284-292.
[6]江华,张晋勋,苏艺,等.砂卵石地层土压平衡盾构隧道施工土体改良试验研究[J].中国铁道科学,2013,(4):40-45.JIANG Hua,ZHANG Jinxun,SU Yi,and et al.Study on soil conditioning experiments during earth pressure balance shield tunneling in sand gravel strata[J].China Railway Science,2013,(4):40-45.
[7]钟毅,杨龙才,房师涛,张润来.砂卵石地层的土压平衡盾构施工土体改良试验研究[J].华东交通大学学报,2015,(6):44-53.ZHONG Yi,YANG Longcai,FANG Shitao,ZHANG Runlai.Research on soil conditioning of sand pebble layer in EPB tunneling[J].Journal of East China Jiaotong University,2015,(6):44-53.
[8]唐卓华,徐前卫,杨新安,等.富水砂层盾构掘进碴土改良技术[J].现代隧道技术,2016,(1):153-158.TANG Zhuohua,XU Qianwei,YANG Xin'an,and et al.Soil conditioning technology for shield tunneling in a water-rich sandy stratum[J].Modern Tunneling Technology,2016,(1):153-158.
[9]叶新宇.泥质粉砂岩地层土压平衡盾构碴土改良试验研究与应用[D].长沙:中南大学,2014.YE Xinyu.Experimental Study of soil conditioning for earth pressure balance shield in argillaceous siltstone stratum and its application[D].Changsha:Central South University,2014.