It shows that surface layer stress of composite subgrade with plain concrete pile improved by plain concrete is focused on pile and is diffused to deep layer;there is displacement between pile and.

• 在较差地质条件、不同填筑材料情况下,用素混凝土桩和搅拌桩进行了城市道路路基处理的原位试验,分析了超孔隙水压力、桩间土分层沉降、附加有效应力、路基深层土的侧向位移等数据。