Method for processing long-pile short-pier composite foundation

Abstract

The invention relates to a method for processing a long-pile short-pier composite foundation, which sets pier-changing and inter-pier pitching piles in the foundation to satisfy the foundation bearing capacity and deformation requirements, performs pier setting mainly through a forced ramming or forced ramming displacement method, and sets sedimentation control piles between the piers. The principle of displacing pier distribution points comprises the following steps: symmetrically setting one or more displacement points for changing the piers in the length direction of an independent foundation, and setting the sedimentation control piles between the displacement points as the inter-pier pitching piles; evenly setting a plurality of displacement points for changing the piers in the length direction of a strip foundation, and arranging the sedimentation control piles between the displacement points according to the designed separation distance; and on the basis of a large size, calculating the required displacement ratio of rectangular or quincuncial distribution points for the displacing pier distribution points according to the bearing capacity, calculating the required pile number for the sedimentation control piles according to sedimentation, and arranging the piles according to rectangular or quincuncial shapes between the displacing piles. The method has the advantages of manufacturing cost saving, mature construction experience, simple process and remarkable effect, and economically and effectively solves the problems that the bearing capacity of deep made ground or a soft soil foundation is insufficient and the foundation deformation is large and uneven.

Description

technical field [0001] The invention relates to a composite foundation treatment method, which is applied to the foundation treatment of construction structures, storage yards, oil tank foundations and other projects in the fields of water conservancy and hydropower, petroleum and petrochemical, shipbuilding, and logistics yards. A new method for insufficient bearing capacity of the foundation and difficult settlement control such as land filling or dredging land formation. Background technique [0002] At present, the commonly used foundation treatment methods for deep filling or dredging land area formation include surcharge preloading method, dynamic compaction method, dynamic compaction replacement method, cement-soil mixing pile method, CFG (Cement Fly-ash Grave, Cement fly ash gravel pile) pile method, compacted sandstone pile method, rigid pile, flexible pile, and rigid-flexible composite pile foundation method, settlement control composite pile foundation method, etc...

AI Technical Summary

Problems solved by technology

The settlement control composite pile foundation is applied to the geological conditions with relatively good foundation bearing capacity. For deep fill or dredging soft soil foundation, the bearing capacity is low, and the self-weight consolidation is usually not completed, so the application of the settlement control composite pile foundation has limitations.

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