Construction method for underwater well point dewatering reinforcement pile forming

Abstract

The invention discloses a construction method for underwater well point dewatering reinforcement pile forming. The construction method comprises the following steps that S1, the initial water level and the mud surface depth are determined, and well point measuring and positioning are completed; S2, pressing a dewatering well pipe into the bottom mud; S3, a pore water pressure gauge and a submersible pump are placed in a dewatering well casing, and water pumping is tested; S4, after test water pumping is completed, the submersible pump and a drainage pipe are connected; S5, a water pumping system is started, and water pumping is stopped when the water level meets the design requirement; and S6, the dewatering well pipe is taken out, and gravel is backfilled. According to the construction method, the operation process is simple, the construction period is short, the construction sequence of dewatering firstly and then backfilling and pile forming in a well pipe hole is adopted, tube well point dewatering and backfilling and pile forming in the well pipe hole are combined, the underwater soft foundation is reinforced, the bearing capacity of the soft foundation is effectively improved, and good engineering application prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of soft soil consolidation, and in particular relates to a construction method for underwater well point precipitation and reinforcement into piles. Background technique [0002] In the prior art, soft soil foundation generally refers to a weak soil layer with low strength and low compressive modulus. Due to the low strength of soft soil and large settlement, in various roads or construction projects, it is necessary to reinforce the soft soil foundation deal with. The reinforcement methods for soft soil foundation mainly include drainage consolidation method, composite foundation method and dynamic compaction method. [0003] The drainage consolidation method is to set up vertical drainage bodies such as sand wells or plastic drainage strips on the natural foundation or the existing foundation, and then perform ballasting according to the weight of the building itself, or preload the preload on the site be...

AI Technical Summary

Problems solved by technology

The method of backfilling first and then treating the soft foundation has the following two disadvantages: first, the amount of settlement is large during backfilling, uneven backfilling will damage the foundation and even cause underwater landslides, and replacement of deep soft soil is uneconomical and not environmentally friendly; Backfilling to the water surface and then preloading, the reinforcement effect on the soft soil below the original mud surface is not ideal, and a large preloading load will be lost

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