Construction device and method for multifunctional pipe pile for drainage of land reclamation and island building

Abstract

The invention discloses a construction device and method for a multifunctional pipe pile for drainage of land reclamation and island building. Holes are formed in the side surfaces of pile bodies of aprefabricated pipe pile, the pipe pile is wrapped with geotextile, an upper piston is driven by expansion and shrinkage of a hydraulic liner to lift and drop vertically along guide columns, and hingeassemblies are driven to bend; the guide columns and the hinge assemblies are arranged between the upper piston and a lower piston, and the hinge assemblies are mounted on the guide columns; slurry enters upper spherical hinges through grouting ports, passes through upper linkage pipes, enters middle spherical hinges and is sprayed out by spray nozzles; the prefabricated pipe pile is partially embedded into submarine soil mass, layered placement for drainage is performed repeatedly in a sandy soil and soft soil layered alternate manner, grouting is performed after solidification, and different outwards grouting angles of a grouting fluid from the side wall holes of the pile correspond to different functions. The construction device and method have the advantages that bearing capacity, pull resistance and lateral resistance of a pile foundation are improved, and the bearing capacity of the pile foundation is improved effectively; expenditures are reduced, construction efficiency is increased, the requirement for fast island forming is met, and differential settlement of filled soil layers is controlled effectively.

Description

technical field [0001] The invention relates to a pipe pile construction device and a construction method thereof, and relates to a construction device and a construction method of a multifunctional pipe pile for reclamation and island construction capable of drainage in the field of civil engineering construction technology, which can be used for different engineering conditions, Accelerate the consolidation of the soil and improve the bearing capacity of the filling foundation, pullout resistance, side resistance, etc., and can effectively control the uneven settlement of the filling soil layer. Background technique [0002] At present, with the rapid development of my country's economic construction, land resources in the developed eastern coastal areas are limited, and people's demand for living environment is increasing. Reclamation and island construction projects such as Binhai New City, large ports, new airports, high-speed railways and other projects have entered sta...

AI Technical Summary

Problems solved by technology

Among them, mountain excavation and sea reclamation have the following characteristics: (1) the filling foundation structure is loose, (2) great damage to the natural environment and high pollution; sand blowing land reclamation has the following characteristics: (1) low bearing capacity, (2) Self-weight consolidation time is long, (3) high filling cost

The characteristics of the commonly used pile foundation composite foundation to reinforce the filling soil layer are as follows: (1) the bearing capacity of the soil layer has been improved to a certain extent, (2) the self-weight consolidation time is long, generally about 2-3 years, which may cause large (4) Due to the different properties of the soil layer on the offshore continental shelf, it is easy to produce uneven settlement after filling, which is not conducive to subsequent construction such as high-rise buildings and large airports, and will cause differences Settlement causes cracking of houses and the impact of aircraft take-off and landing at the airport; the drainage consolidation method uses plastic drainage boards as the vertical drainage body, and then adopts preloading preloading, vacuum preloading or a combination of the two methods to drain and consolidate the soil layer. The following characteristics: (1) It can achieve drainage and consolidation of the soil, but it cannot greatly increase the bearing capacity of the soil; (2) It cannot be completed simultaneously with the process of soil filling, and the construction period is long; (3) Drainage and consolidation The junction is uniform, and it is impossible to adjust the differential settlement in local areas

The engineering situation of reclamation and island construction is relatively complicated, and the current foundation treatment methods have a single improvement purpose, which cannot simultaneously meet various requirements such as bearing capacity, pull-out resistance, and lateral resistance.

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