Lime coal ash precast pile and pile forming technique, and method for forming composite ground foundation

Abstract

The present invention discloses a lime and flyash precast pile which is used for reinforcing the soft base, the precast pile comprises a double ash material which is precast in the outer surrounding with a dense state; the double ash material is composed of lime and flyash; the bulk factor between the lime and the flyash is 7:3, 6:4 or 5:5; the lime adopts the lime with grade above III level and the water content of the flyash is 25-35%; the front and low ends of the precast outer surrounding is sealed openings; and the material of the precast outer surrounding is the nonwoven fabric with strong water permeability. The precast pile of the invention is mainly suitable for the sullage-shaped clay of the ultra-soft base, and is suitable for the ground treatment of the beach reclamation or the reinforcing of the ultra-soft ground. At the same time a pile forming technique of the precast pile and a method using the pile for forming the composite ground are disclosed in the invention.

Description

technical field [0001] The present invention relates to a kind of pile body that is applied in muddy cohesive soil and pile-forming technology and the method for forming composite ground with this pile, especially relate to a kind of method for dealing with weak ground (saturated cohesive soil, silt, muddy soil) Lime, fly ash double ash pile, pile forming technology and method for forming composite foundation with the pile. Background technique [0002] my country began to study the basic properties, reinforcement mechanism, design and construction of lime piles in the 1950s, and was conducted by Tianjin Academy of Building Research, Tianjin University, Beijing Railway Bureau Survey and Design Institute and Tongji University. A comparative test study of lime piles and other reinforcement methods shows that: under the condition of high groundwater level, lime piles have a better effect in treating subgrades in coastal areas. After 1981, the Jiangsu Provincial Architectural De...

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Problems solved by technology

Utilizing the lime and fly ash prefabricated piles and the pile forming process used to deal with weak foundations in the present invention can expand the application range of lime piles, and the method for forming composite foundations by using the prefabricated piles can ensure the quality of pile sinking and solve the problems in the prior art The influence of fly dust and noise on the environment caused by the construction of lime piles, at the same time, it also solves the problems such as difficult control of construction quality, environmental conditions and construction noise of lime piles in special engineering conditions such as soft foundations and ultra-soft foundations application problem

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