Construction method for enhancing strength of cement mixing pile through combination of fiber reinforcement and electroosmosis method

Abstract

The invention discloses a construction method for enhancing the strength of a cement mixing pile by combining fiber reinforcement with an electro-osmosis method, which comprises the following steps: on the basis of a traditional cement mixing pile, mixing polypropylene fibers into a common Portland cement mixture, inserting steel bars into the pile as a cathode and an anode, and arranging a water collecting header pipe on the cathode side as a drainage channel; and a calcium chloride solution is doped during mixing, so that the electroosmosis period is shortened, and the electroosmosis effect is optimized. The construction technology is simple, after reinforcement is conducted through the polypropylene fibers, the bending resistance, shearing resistance, pulling resistance and cracking resistance of a pile body are remarkably improved, compared with a common cement mixing pile, the strength is uniform after electroosmosis, the solidification age is effectively shortened, and high engineering economic applicability is achieved.

Description

technical field [0001] The invention relates to a foundation construction technology, in particular to a construction method for strengthening the strength of cement mixing piles by fiber reinforcement combined with electroosmotic method. Background technique [0002] In my country's coastal areas, silty soft clay layers are widely distributed, and the soil particles are mainly small-sized clay particles with high plasticity and high water content. As one of the most commonly used reinforcement measures for soft foundation treatment, the cement-soil mixing pile uses cement as a curing agent, and through a specific mixing machine, the soft soil and cement mixture are forcibly mixed and hardened deep in the foundation, so that the reinforced pile body and The natural foundations together form a composite foundation with high bearing capacity and low compressibility. However, there are still some deficiencies in the traditional cement-soil mixing piles: since the pile body is ...

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in the traditional cement-soil mixing piles: since the pile body is not equipped with steel bars, the foundation piles have low resistance to horizontal loads, uplift loads, and impact loads; The design value of the pile strength generally takes at least 90 days, and the longer consolidation age delays the construction progress of the superstructure

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