摘要
研究了聚苯乙烯泡沫塑料的压缩性能,并将其用于现场进行土压力调整试验,通过回归分析和有限元计算,提出了在既定调整效果条件下合理、定量选择土压力调整材料厚度、密度及埋设宽等技术参数的方法,为工程设计提供参考依据。
With the rapid development of expressway, more and more constructions such as culverts have been built under highly filled embankment. However, the damage and accident occur frequently. The main cause of culvert damage is that the formulas or empirical curves with a smaller copulating result are adopted by some designers to calculate the vertical earth pressure on the top of the culvert. The better way to resolve the problem is to pave the soft material whose compressibility is larger than earth fill on the top of the culvert, and as a result, the earth pressure can be regulated properly. Having studied the mechanical properties of expanded polystyrene（EPS~ through experimental test and filled it on the top of the culvert with high embankment to in-situ test load shedding and compared the results, it is found that the deformations of EPS under two conditions are similar. Based on the combining recursive analyses, the empirical formulae to calculated the vertical earth pressure on the top of culvert under given regulation effects are presented. In addition, with the finite element calculation, the effects of the breadth of regulation material on earth pressure of culverts are studied and the propositional numerical values for different shapes of culverts are achieved. Furtheri^aore, the method of rational and measurable height choice, and density and filling breadth of regulation material for given regulation effects, are put forward which can afford references to project design.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第A02期5756-5761,共6页
Chinese Journal of Rock Mechanics and Engineering
