摘要
交通动荷载作用下粉土路基具有沉降变形过大等特点,成为公路工程难题。依据工程实例,采用大型有限差分软件FLAC^(3D)对某粉土路基进行了动力响应分析、得到了路基沉降云图,路表沉降时程规律和剪切应变增量云图等。数值分析表明:动荷载幅值为10kPa、20kPa,30kPa和40kPa时,路基表面沉降位移分别为0.52cm、1.09cm、1.71cm和2.50cm,呈非线性增长:路基沉降分为瞬时沉降和动力固结沉降,其中动力固结沉降约占总沉降的一半左右,在公路工程中应给予重视。
The large settlement deformation of silt subgrade under traffic loading is a important engineering problems. Based on engineering example,the dynamic response of silt subgradc was analyzed.Subgrade settlement cloud, the road surface settlement process rules and shear strain increment cloud was obtained. Numerical analysis shows that： the dynamic load amplitude of 10kPa, 20kPa,30kPa and 40kPa, the subgrade surface subsidence displacement were 0.52cm,1.09cm, 1.71cm and 2.50era,is non--linear. Subgrade setllcment is divided intn immediate settlement and power consolidation settlement and dynamic consolidation settlement accounts for about half of the total settlement.
出处
《科技创新导报》
2015年第8期83-86,共4页
Science and Technology Innovation Herald
关键词
粉土
路基工程
交通荷载
数值分析
Western Liaoning Silt
Subgrade Engineering
Traffic Load
Numerical Analysis
