路基下沼泽草甸层地基沉降预测方法研究

针对沼泽草甸层地区工程地质特征,以新疆兵团垦区沼泽草甸层试验路段为依托,探讨了该类地区路堤填筑过程中地基沉降发展规律,并通过对比分析经验法沉降预测模型,给出了适合沼泽草甸层地基的沉降预测模型。最后,以预测沉降曲线与实际监测值对比,结果表明,双曲线法预测效果较好,适用于该类地区路堤填筑时沉降预测。

兵团垦区沼泽草甸层的利用及路基稳定性分析

通过对新疆生产建设兵团垦区吐尔干镇～坡马镇公路沼泽软土草甸层物理力学性质的分析,提出可以利用草甸层的加筋效果,在沼泽软土地基上直接填筑路堤的观点。采用简化毕肖普法计算了在草甸层上直接填筑路基时的稳定性,据此确定路基安全填筑高度,并通过工程实践进行了验证。

Effect of thatch on water-soluble phosphorus of pasture soil fertilized with broiler litter

The presence of a thatch layer in established pastures could reduce the contact between broiler litter and soil, thus increasing the potential for surface runoff contamination with litter P. We conducted a laboratory study to evaluate the effect of a thatch layer on the dynamics of water-soluble P in undisturbed cores taken from a pasture. Cores with and without a thatch layer received a surface application of broiler litter (5 thm-2) and were incubated at 25 oC for 56 d. The result showed that on the soil surface the contents of water soluble-P (39 kghm-2) of the cores with the thatch layer was higher than that (20 kghm-2) of the cores without the thatch layer. Therefore on well-established pastures fertilized with broiler litter, the presence of a thatch layer might lead to high concentrations of water-soluble P on the soil surface.

高寒矿区河流改道及综合治理工程实践

介绍哆嗦河新河道开挖及治理情况，通过分析河道开挖后出现的灾害因素，阐述了河道治理措施，总结河道治理中的经验得失。