Bamboo casing pile combined with electroosmosis to strengthen soft soil subgrade system and construction method

Abstract

The invention relates to a bamboo joint type sleeve pile and electroosmosis combined soft soil roadbed reinforcement system. The system is characterized by comprising an electroconductive plastic drainage plate, bamboo joint type sleeves, a prefabricated pile point and a prefabricated cover plate; the strip electroconductive plastic drainage plate tightly fits the outer sides of the bamboo joint type sleeves; the bamboo joint type sleeves are fixed through steel rings at certain intervals; the prefabricated pile point is arranged at the bottom end of a bamboo joint type sleeve pile; a U-shaped reinforcing bar is pre-buried in the prefabricated pile point; the bottom end of the electroconductive plastic drainage plate is connected with the U-shaped reinforcing bar; the prefabricated cover plate is arranged at the top end of the bamboo joint type sleeve pile; a preformed hole for allowing the electroconductive plastic drainage plate to pass through is reserved in the prefabricated cover plate; the electroconductive plastic drainage plate stretches out of the preformed hole; and the electroconductive plastic drainage plate is connected with a direct current power source through a conducting wire. The bamboo joint type sleeve pile and electroosmosis combined soft soil roadbed reinforcement system has the beneficial effects that the bamboo joint type sleeve pile is formed through connecting sections of bamboo joint type sleeves, and the problem that the construction is difficult due to the fact that the sleeve length of a conventional plastic sleeve pile is difficult to control is solved; and the bamboo joint type sleeves have bulges, so that the friction force of a common plastic sleeve pile and a surrounding soil body is improved, and the bearing capacity is improved.

Description

technical field [0001] The invention belongs to the field of foundation reinforcement engineering, and in particular relates to a soft soil subgrade system and construction method combined with electroosmotic reinforcement of bamboo joint casing piles, which is suitable for soft soil foundation treatment construction. Background technique [0002] A large amount of deep soft soil is widely distributed along the coast of my country, mainly including Tianjin, Lianyungang, Shanghai, Zhoushan, Hangzhou, Ningbo, Wenzhou, Fuzhou, Xiamen, Quanzhou, Zhangzhou, Guangzhou and other areas, and the soil quality is mainly muddy soil. These areas are all densely populated and economically developed areas in our country, and these areas are undergoing large-scale construction. Because soft soil has the characteristics of high water content, large natural pore ratio, high compressibility, low permeability, low shear strength, and small consolidation coefficient, it is not effective to deal ...

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Problems solved by technology

Plastic casing concrete pile is a new type of small-diameter rigid embankment pile. Although it has been applied in many expressway and municipal road projects in China, and has achieved certain technical and economic benefits, due to the high water content of the soft soil, the permeability is low. If it is relatively poor, it will generate high excess pore water pressure in the lower part of the plastic sleeved concrete pile, and it is not easy to dissipate; the plastic sleeved concrete pile will also produce a serious soil squeezing effect, which will cause the surrounding completed piles to float. In addition, although the plastic casing on the surface of the plastic casing concrete pile has depressions on the surface, it can increase the side friction to a certain extent, but because the pile is surrounded by soft soil, the side friction of the plastic casing concrete pile is still not high , usually requires a denser pile spacing to provide the required bearing capacity of the subgrade, which leads to a waste of resources and an increase in engineering costs

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