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桩-网复合地基同时具备竖向增强和水平向增强两种加固形式的优点,由桩、网、土三者共同协调作用,有效分担路堤荷载,是一种作用机理复杂的地基加固方法。通过对某客运专线红粘土桩-网复合地基试验段进行的现场测试试验,对复合地基的基底土压力、土工格栅变形、孔隙水压力以及桩土沉降量等方面的测试,得出红粘土复合地基需要在桩、网、桩间土通过一个反复的作用过程才能达到稳定状态等结论,将有助于深入研究桩-网复合地基加固机理,并为进一步完善桩-网复合地基设计方法提供依据。
The pile-net composite foundation has the advantages of both vertical reinforcement and horizontal reinforcement at the same time. The pile, net and soil work together to effectively share the embankment load, which is a method of foundation reinforcement with complicated mechanism of action. Through the field test on the test section of red clay pile-net composite foundation in a passenger dedicated railway line, the test of the soil pressure on the foundation, the deformation of geogrids, the pore water pressure and the settlement of pile-soil in the composite foundation shows that the red clay The composite foundation needs to reach a steady state through a repeated action process of piles, nets and piles and so on. It will be helpful to further study the reinforcement mechanism of the pile-net composite foundation and provide the basis for further improvement of the design method of pile-net composite foundation in accordance with.