Construction Technology for Dense Small Clearance Group Pile in Complex Geological Conditions
In relation to the Hengbang Tianfu Yunxi project in Chengdu,it introduces the prcess of the determining the construction technology of the pile foundation with multiple trial piles under the condition of complicated geology,small pile spacing and pile length ≥30.0 m.According to the test results,φ800 mm piles adopted the scheme of"medium and long length casing+mud wall protection",and φ1 200 mm piles adopted the scheme of"full casing wall protection".When the hole collapsed,steel casing was installed into the stable soil layer ≥ 2.0 m.After testing,all pile foundations are Class Ⅰpiles and the vertical compressive capacity of single pile meets the design and specification requirements.
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