中文摘要：

灌注桩在岩土工程中得到了广泛的应用，其形式也逐渐丰富。从截面形式、施工工艺、工程应用等方面对DX桩、矩形桩、Y形桩、现浇薄壁桩等新型灌注桩进行了详细分析，并时其承载机理和承载力计算进行了探讨。与传统灌注桩相比．新型桩具有截面惯性矩大、单方混凝土承载力高等优点。

英文摘要：

Cast-in-site concrete piles are used extensively in geotechnical engineering, and the type becomes very rich. An analysis for new cast-in-site concrete piles such as DX pile, barrette, Y-shaped pile, thin-wall pile, is conducted from angles of section type, application field and construction technology, with their load-carrying behaviors studied. Comparing with traditional cast-in-site concrete piles, the new-type piles have such advantages including big section moment of inertia and high bearing capacity of unit volume concrete.