Pile-sinking construction method for deep riprap unfavorable geologic region

Abstract

The invention discloses a pile-sinking construction method for a deep riprap unfavorable geologic region, and the pile-sinking construction method firstly performs earthwork replacing operation of a vertical enclosure structure area, and performs vertical pile construction or steel plate pile enclosure structure construction in an area in which replacement is completed. The pile-sinking construction method is characterized in that the earthwork replacing operation comprises the following steps: (1) measuring, paying off and positioning; (2) defining one group by a plurality of pile tubes which are arranged in parallel and are provided with movable pile tips, and performing pipe-sinking construction; (3) backfilling fine grained soil into one group of immersed tubes which are constructed; (4) after earthwork backfilling is completed, reserving the last pile tube as the first one of a next group, pulling off the rest of the pile tubes, thereby forming a cob wall; and (5) repeating steps (2) to (4), and performing pipe-sinking backfilling operation of the next group of pile pipes until earthwork of the vertical enclosure structure area is replaced. The pile-sinking construction method is convenient in construction, is high in pile sinking efficiency, is low in construction cost, and can strength the water-stop effect of the vertical enclosure structure.

Description

Technical field [0001] The invention relates to a construction method of geotechnical engineering, in particular to a construction method used for non-destructive pile driving in poor geological areas with thick and bad soil layers such as ballast, miscellaneous fill, rubble and silt squeezing. Background technique [0002] Vertical retaining structures such as steel sheet piles or construction method piles are relatively common construction structures. However, during the construction process, when encountering geological areas with thicker and unfavorable soil layers such as ballast, miscellaneous fill, and rock dumping and silt At times, these ballasts, miscellaneous fills, dumped rocks and squeezed silt will have a great impact on pile driving. The current general practice is to carry out large-scale excavation and replacement in the construction area before construction. This method has the following shortcomings: 1. The replacement workload is large and the cost is high; 2....

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a pile sinking construction method in deep and thick riprap-like unfavorable geological areas, so as to solve pile types such as construction method piles or steel sheet piles when encountering thicker bad conditions such as ballast, miscellaneous filling soil, and riprap silting. Problems that cannot be implemented smoothly in the soil layer

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