王仕传, 李云凤, 邵艳, et al. Influence of Shallow-buried Subway Excavation on Urban Pavement Structure[J]. 2014, 34(6): 725-730. DOI: 10.13409/j.cnki.jdpme.2014.06.010.
地下通道浅埋暗挖对城市道路结构的影响
摘要
城市地下通道浅埋暗挖法施工会导致地层变形和地表沉降。采用通用有限元软件ABAQUS
对地下通道浅埋暗挖施工过程进行数值模拟
根据围岩开挖引起的位移响应和应力响应计算
结合现场实测数据
评价地下通道浅埋暗挖法施工对城市道路路面结构的影响
并讨论长管棚超前预支护对减小围岩开挖引起的路面结构附加弯拉应力的意义。分析结果表明:浅埋地下通道
围岩软弱
暗挖施工会引起显著的地层损失和路表沉降
这会导致沥青混凝土路面结构内形成较大的附加弯拉应力;采用长管棚超前预支护可控制地层损失和路表沉降
并可减小由此引起的路面结构附加弯拉应力。
Abstract
Urban shallow-buried subway construction will lead to stratum displacement and ground surface settlement.Construction process of shallow-buried subway was numerically modeled by general finite element method ABAQUS.According to calculated displacement response and stress response resulting from surrounding rock excavation
and also based on in-situ test data
influence of shallow-buried subway excavation on urban pavement structure was evaluated
and the meaning of decreasing of pavement structure additional flexural tensile stress due to presupported surrounding rock by advance long pipe roof was discussed.Analytical results show that excavation construction of shallow-buried subway with soft surrounding rock will cause remarkable stratum loss and distinct pavement surface settlement
which will lead to larger additional flexural tensile stress in asphalt concrete pavement structure
and pre-support of long pipe roof has great value to control the development of stratum loss and pavement surface settlement and decrease the additional flexural tensile stress in pavement structure due to them.
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