Consistency of Horizontal Alignment at Tunnel Entrance and Exit Zone

doi:10.3969/j.issn.0253-374x.2012.04.009

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Consistency of Horizontal Alignment at Tunnel Entrance and Exit Zone
DOI:
                        10.3969/j.issn.0253-374x.2012.04.009
                    
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                        YANG ZhenYANG Zhen
College of Transportation Engineering, Tongji University, Shanghai 201804, China
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TANG YingTANG Ying
College of Transportation Engineering, Tongji University, Shanghai 201804, China
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TANG LeiTANG Lei
College of Transportation Engineering, Tongji University, Shanghai 201804, China
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Abstract:

针对现行公路隧道设计规范对隧道进出口处平面线形一致性缺乏明确判别标准，提出了方向盘冻结3 s导致的行车轨迹同原有路线的偏移值作为线形一致性的控制性指标,控制阈值取0.2 m .对3种不同设计条件下的隧道线形一致性进行分析，发现缓和曲线参数是影响平面线形一致性的重要指标.通过理论推导给出不同设计条件下隧道进出口平面线形一致性的判别标准，使设计者能在保证线形安全的前提下对隧道进出口平面线形进行灵活设计和评价.应用该研究成果对龙庆高速公路某隧道洞口的线形一致性进行了分析，提出了相应的改进建议.

Key words:tunnel entrance and exit zone; horizontal alignment; restraining indexes; consistency; spiral curve parameter

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YANG Zhen, TANG Ying, TANG Lei. Consistency of Horizontal Alignment at Tunnel Entrance and Exit Zone[J].同济大学学报(自然科学版),2012,40(4):0553~0558

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Received:January 12,2011
Revised:January 10,2012
Adopted:May 09,2011
Online: April 27,2012
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