地铁暗挖车站成本优化合理埋深研究
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摘要
优秀的地铁车站设计方案应在保障安全性的前提下提高经济性。在对青岛地铁6座暗挖车站土建成本工程数据统计分析和君峰路车站典型案例细致剖析的基础上,构建了上软下硬地层地铁暗挖车站建设成本数学分析模型,系统分析了不同软弱土层厚度地铁车站建设成本随埋深变化特征,深入探讨了上软下硬土岩组合地层地铁暗挖车站成本优化合理埋深问题。结果表明:车站主体开挖面从软硬土岩组合地层交界面过渡到下覆岩层,车站建设成本有一个突然下降的阶段;覆岩厚度是衡量地铁车站土建成本的有效指标;车站主体置于坚硬岩层中并满足围岩自稳要求的最小覆岩厚度时车站经济性最好,可将车站主体隧道围岩满足自稳要求最小覆岩厚度时的设计深度作为合理埋深。
Excellent metro station design scheme should improve the economy on the premise of safety. Firstly,the mathematical model for construction cost of mined metro station is constructed,based on the statistic analysis of engineering data and the in-depth analysis of typical case of the construction cost of Qingdao mined metro station.Then,the construction cost of mined metro station varies with buries depth is system analyzed under different thickness of soft soil stratum. Finally,the reasonable buried depth of mined metro station based on the construction cost optimization is discussed in the combined stratum of upper-soil and lower-rock stratum. The results show that the construction cost decreases suddenly when the excavation surface of the metro station main body transits from the combined stratum to the hard rock stratum; the cover layer rock thickness is the effective indicator for measuring the metro station construction cost; the metro station cost efficiency is optimal when the main body is placed in the rock stratum and kept the reasonable smallest thickness; the design depth which satisfies the minimum overburden thickness of the main body of the station can be taken as the reasonable burial depth.
Excellent metro station design scheme should improve the economy on the premise of safety. Firstly,the mathematical model for construction cost of mined metro station is constructed,based on the statistic analysis of engineering data and the in-depth analysis of typical case of the construction cost of Qingdao mined metro station.Then,the construction cost of mined metro station varies with buries depth is system analyzed under different thickness of soft soil stratum. Finally,the reasonable buried depth of mined metro station based on the construction cost optimization is discussed in the combined stratum of upper-soil and lower-rock stratum. The results show that the construction cost decreases suddenly when the excavation surface of the metro station main body transits from the combined stratum to the hard rock stratum; the cover layer rock thickness is the effective indicator for measuring the metro station construction cost; the metro station cost efficiency is optimal when the main body is placed in the rock stratum and kept the reasonable smallest thickness; the design depth which satisfies the minimum overburden thickness of the main body of the station can be taken as the reasonable burial depth.
引文
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[15]程韬,刘建伟,曹平.硬岩大跨暗挖地铁车站施工方案优化分析[J].地下空间与工程学报,2014,10(3):635-640.(Cheng Tao,Liu Wei,Cao Ping.Game theory in design of rock tunnel support[J].Chinese Journal of Underground Space and Engineering,2016,12(2):456-463.(in Chinese))
[2]胡兰,李涛.基于围岩级别变更的隧道工期与造价风险研究[J].现代隧道技术,2013,50(6):39-43.(Hu Lan,Li Tao.Risk assessment of tunnel construction schedule and cost based on the alteration of rock mass classifications[J].Modern Tunnelling Technology,2013,50(6):39-43.(in Chinese))
[3]胡兰,李涛,仇文革.隧道施工进度与成本动态预测与控制研究[J].铁道工程学报,2015(1):115-121.(Hu Lan,Li Tao,Qiu Wenge.Study on dynamic prediction and control about tunnel construction schedule and cost[J].Journal of Railway Engineering Society,2015(1):115-121.(in Chinese))
[4]丁士昭.工程项目管理[M].北京:中国建筑工业出版社,2017.(Ding Shizhao.Project management in construction[M].Beijing:China Construction Industry Press,2017.(in Chinese))
[5]杨义钊.关于降低城市地铁工程造价的几点思考[J].隧道建设,2001,24(2):77-80.(Yang Yizhao.Some thoughts on reducing the cost of metro Subway Engineering[J].Tunnel Construction,2004,24(2):77-80.(in Chinese))
[6]陈进杰.城市轨道交通项目广义全寿命周期成本理论与应用研究[D].北京:北京交通大学,2011.(Chen Jinjie.Theory and application of generalized life cycle cost of urban rail tail project[D].Beijing:Beijing Jiaotong University,2011.(in Chinese))
[7]农兴中.地铁车站土建工程造价控制的分析与探讨[J].广东土木与建筑,2002(7):35-36.(Nong Xingzhong.Analysis and discussion on construction cost control of metro station civil engineering[J].Guangdong Architecture Civil Engineering,2002(7):35-36.(in Chinese))
[8]张自光,仇文革.上软下硬地层暗挖地铁隧道合理岩跨比探讨及实例分析[J].现代隧道技术,2015,52(6):28-35.(Zhang Ziguang,Qiu Wenge.Discussion and case study of the rational ratio of rock mass thickness and tunnel span of mined subway tunnels in upper-soft and lower-hard ground[J].Modern Tunnelling Technology,2015,52(6):28-35.(in Chinese))
[9]张自光.土岩二元地层地铁隧道合理埋深研究[D].成都:西南交通大学,2017.(Zhang Ziguang.Study on the reasonable buried depth of metro tunnel in the two element strata of soil and rock[D].Chengdu:Southwest Jiaotong University,2017.(in Chinese))
[10]李克先,李术才,赵继增.大跨度暗挖地铁车站开挖工序优化研究[J].地下空间与工程学报,2017,13(5):1329-1337.(Li Kexian,Li Shucai,Zhao Jizeng.Study on optimizing excavation construction of large span subway station[J].Chinese Journal of Underground Space and Engineering,2017,13(5):1329-1337.(in Chinese))
[11]Broch E.Planning and utilization of rock caverns and tunnels in Norway[J].Tunnelling and Underground Space Technology,2016,55:329-338.
[12]朱德章.城市轨道交通车站造价分析[J].铁路工程造价管理,2007,22(4):16-18.(Zhu Dezhang.Analysis on the construction cost of urban rail station[J].Railway Engineering Cost Management,2007,22(4):16-18.(in Chinese))
[13]黄义勇.地铁车站造价分析与控制[J].铁路工程造价管理,2012(5):55-59.(Huang Yiyong.Analysis and control of the subway station cost[J].Railway Engineering Cost Management,2012(5):55-59.(in Chinese))
[14]佘金龙.地下车站主体土建工程造价探析[J].建筑经济,2012(2):25-26.(She Jinlong.Analysis and discussion on the construction cost of civil engineering of underground station main body[J].Construction Economy,2012(2):25-26.(in Chinese))
[15]程韬,刘建伟,曹平.硬岩大跨暗挖地铁车站施工方案优化分析[J].地下空间与工程学报,2014,10(3):635-640.(Cheng Tao,Liu Wei,Cao Ping.Game theory in design of rock tunnel support[J].Chinese Journal of Underground Space and Engineering,2016,12(2):456-463.(in Chinese))