Foundation structure of soft soil stratum and construction method thereof

Abstract

The invention discloses a foundation structure of a soft soil stratum and a construction method thereof, and relates to the field of foundation construction. The problems that high backfill soil and adeep soft muddy soil foundation are poor in stability, and foundation settlement and differential settlement are difficult to control are solved. According to the construction method, small holes aredistributed in the pile periphery of a prefabricated pipe pile in a staggered mode at will, pre-buried barbs are arranged at the small holes, the prefabricated pipe pile is sleeved with geotextile tobe implanted into a soft soil layer, water in soil around the pile permeates through the geotextile and enters an inner pipe from the small holes to be pumped out, after drainage consolidation, the geotextile is torn off, soil around the prefabricated pipe pile enters the pipe through the small holes in the side surface of the prefabricated pipe pile, then foundation soil is backfilled in the pipe of the prefabricated pipe pile, a pile cap is cast in place at the top end of the prefabricated pipe pile, and a first reinforced layer, a cushion layer, a second reinforced layer and a soil fillinglayer are sequentially laid on the pile cap. According to the foundation structure, the foundation bearing capacity of a coastal soft mudflat area can be effectively improved, the filling load borneby soil between piles is small, filling settlement is reduced, and the construction period is effectively shortened.

Description

technical field [0001] The invention relates to the field of foundation construction, in particular to a foundation structure of a soft soil layer and a construction method thereof. Background technique [0002] At present, with the rapid development of my country's economic construction, the land resources in the developed eastern coastal areas are limited, and the construction of reclamation projects, large ports and new airports, high-speed railways, and coastal new urban areas has entered a new period of rapid development. However, soft soil environments generally exist in coastal areas, along rivers, and along lakes, and there are deep soft soil layers distributed under them. The soft soil layers have high water content, poor permeability, low strength, large pores, low density and certain structural properties. and other unfavorable engineering characteristics. In addition, the terrain of weak coastal tidal flats is generally low, and the floor elevation of the site i...

AI Technical Summary

Problems solved by technology

High backfill and deep soft muddy soil bring challenges to foundation treatment: 1) The stability of soft soil foundation under high backfill is poor; 2) It is difficult to control foundation settlement and uneven settlement

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