Mushroom-shaped mixed composite pile capable of effectively controlling settlement and construction method

Abstract

The invention relates to a mushroom-shaped mixed composite pile capable of effectively controlling settlement and a construction method. The invention relates to a technique for treating soft geologies in geotechnical engineering, the pile not only solves the defects of the commonly used prior foundation treatment technique, including the low strength of the mixed pile body and the severe compression deformation of the pile body, but also can effectively control post-construction settlement and increase the pressure diffusion angle, and the invention is an economic novel foundation treatment technique. A special-purposed reducing single-shaft mixing pile driver is adopted to shape a mushroom-shaped single-shaft deep-mixed cement-soil pile body, and a precast concrete pile, or a steel pipe or a bamboo-wood material as a core material is inserted in the center of the pile body to form the novel composite pile which consists of a mushroom-shaped cement-soil mixed pile and a high-strength core pile.

Description

1. Technical field [0001] The invention relates to a strengthening technology for weak geography in geotechnical engineering. By inserting a high-strength core material into a mushroom-shaped cement-soil mixing pile to form a composite pile, the strength of the pile body of the composite pile will be greatly improved, and the pressure diffusion angle will be increased. Effectively control foundation settlement and reduce project cost. 2. Technical background [0002] In the engineering construction in my country's coastal areas, along the river and other areas, there are generally characteristics of weak foundation soil, poor stability, and low bearing capacity. Especially in areas with rapid economic development, the cost of foundation treatment will cost more than 100 billion yuan per year. . At present, in my country's foundation treatment projects, the technologies used mainly include: vibration rolling, surcharge drainage, cement-soil mixing piles or high-pressure rotar...

AI Technical Summary

Problems solved by technology

Due to the defects such as difficult control of late settlement, these treatment technologies are often limited in their application in foundation treatment places with high requirements for settlement control.

Due to the low strength of the deep mixing pile itself, it is often difficult to meet the requirements of the bearing capacity, and the high-pressure rotary grouting pile will greatly increase the construction cost due to the high amount of cement

[0003] In view of the shortcomings of the above-mentioned treatment technologies, such as

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