A gravel/sand filter layer-porous concrete pile composite foundation and its treatment method

Abstract

The present invention discloses a gravel / sand filtration layer - Porous concrete pile foundation and composite processing method of the external structure foundation gravel / sand filtration layer, internally porous concrete, the pile diameter of 0.3 ~ 0.8m, pile external gravel / sand filtration layer having a thickness of 0.2 ~ 0.4m, curing underwater porous concrete compressive strength of not less than 5 MPa 28d, permeability coefficient of not less than 5mm / s, the pile from the pile diameter 3-5 times, cellular concrete a porosity of> 20%.The foundation processing method as follows: The ground settlement and the bearing capacity is determined from the pile and the pile diameter, range of foundation reinforcement, reinforcing depth, the pile arrangement, the amount of the filler hole of the pile, the pile of wet clay or particulate material thickness, pile construction, the foundation problem effectively weakens the slurry of porous concrete pile congestion, gravel / sand filtration layer permeable filtration play the advantages of the pile can be continued effective drainage composite foundation.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a gravel / sand filter layer-porous concrete pile composite foundation and a treatment method. Background technique [0002] The composite foundation composed of pile foundation composed of porous concrete materials can carry a certain vertical load when dealing with weak soil foundations, and has a certain single pile bearing capacity and composite foundation bearing capacity. The porous concrete pile body combined with gravel piles and other bulk materials The pile can take advantage of the permeable filter of the bulk material and the high strength and rigidity of the concrete pile. Chinese patent CN102296593A discloses a cylindrical concrete gravel composite pouring pile and its construction technology. The construction technology of the pile is complicated, and the internal concrete is not dense Permeable, the drainage effect of the whole pile body is not ideal. Chinese patent ...

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Problems solved by technology

[0002] The composite foundation composed of pile foundation composed of porous concrete materials can carry a certain vertical load when dealing with weak soil foundations, and has a certain single pile bearing capacity and composite foundation bearing capacity. The porous concrete pile body combined with gravel piles and other bulk materials The pile can take advantage of the permeable filter of the bulk material and the high strength and rigidity of the concrete pile. Chinese patent CN102296593A discloses a cylindrical concrete gravel composite pouring pile and its construction technology. The construction technology of the pile is complicated, and the internal concrete is not dense Permeable, the drainage effect of the whole pile body is not ideal

Chinese patent CN103452093A mentions a series composite foundation of permeable concrete gravel piles. Since the freshly mixed porous concrete is prone to segregation in water environment and vibration construction, the separation of cement slurry and aggregate results in uneven distribution of cement slurry In porous concrete, part of the pores are blocked, so that the porous concrete loses its water permeability function

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