在分析评价现有试验方法的基础上，提出了新的试验装置和试验方法，并通过对水泥土和水泥砂砾的试验进一步确定了试验条件，为继续深入地进行半刚性基层材料的抗冲刷性能研究提供了基础。

This paper presents the dynamic characteristic for the cement soils, discusses some key points in the dynamic modulus testing for them, such as loading frequency, interval time. Ioading wave profile. method of measuring deformation and specimen size, e.g.

As a structural course building material, stabilized soil is widely used in surpar highways in China.This is due to its full utilization of in-sult materials, lower construction cost, higher bearing capacity and simpler construction technique. However, some problems appeared during road construction, operation and reconstruction, such as cracking at low temperatures, slow strength developing, fatigue strength and deformation limits, and strength formation mechanism, were studied by the author. Some research achievements were presented in this paper. The main conclusions are follows, (1) With chemical additives, fully stimulating and utilizing the active matrix in fly ash and soil can increase early strength of stabilized soil at normal and low temperatures; (2) The gravel content and structural pattern of mixture determine their effect on the thermal contraction of stabilized soil. Greater percentage of fly ash in the mixture reduees the thermal sensibility of soil-fly ash-lime; (3) Gravel stabilized with inorganic binders is fragile and sensitive to applied stress level during repeated loading. Strain growth, for all kinds of stabilized gravels, has the same limit ∑=250×10-6; (4) With thermodynamics analysis the theoretical optimum quantity of lime, curing possibility at low or high teperatures were determined.

本文阐述了道路排水工程设计生态性要求的发生背景和迫切性，提出了排水设计生态性准则的内容，讨论了新的排水设计原则指导下的路面和路基结构设计方案。