CFG core gravel composite pile, composite foundation formed by CFG core gravel composite pile and construction method
A composite foundation and composite pile technology, which is applied in basic structural engineering, soil protection, construction, etc., can solve the problems of slow dissipation of excess static pore water pressure, pile fracture, and large post-construction settlement. and the effect of settlement during operation, accelerated consolidation settlement, and shortened construction period
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[0038] Example 1
[0039] Such as figure 1 , The composite foundation of the CFG core sand-gravel composite pile of the present invention includes a CFG core sand-gravel composite pile 1, a geogrid 2, a cushion layer 3 and a soft soil foundation 5. The CFG core sand-gravel composite pile 1 is driven into the soft soil foundation 5, and the bottom end extends into the hard soil layer 6 at the end of the pile.
[0040] Such as figure 2 , CFG core sand-gravel composite pile 1 is composed of a CFG core 1-1 and a sand-stone shell 1-2 that wraps the CFG core. The CFG core 1-1 is a straight cylinder with a bottom diameter of 40-50cm, and the sand-stone shell 1-2 The cross section of is annular, and is arranged concentrically with the CFG core, and the thickness of the sandstone shell is 5-10cm.
[0041] The CFG core is obtained by pouring CFG mixture. The final setting strength of the CFG mixture is not lower than C15. The sand is medium sand or coarse sand, the particle size of the crush...
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