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A method of using zeolite and fly ash to strengthen liquefied sand foundation

A sandy soil foundation and fly ash technology, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of poor durability and insufficient reinforcement strength, achieve stable reinforcement effect, improve reinforcement effect, and increase reinforcement strength Effect

Active Publication Date: 2020-08-18
上海先科桥梁隧道检测加固工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a method for strengthening liquefied sandy soil foundation by using zeolite and fly ash in view of the defects of poor durability, need for post-maintenance and insufficient reinforcement strength in the current traditional reinforcement method of liquefied sandy soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Weigh the zeolite and put it into the ball mill, add zirconia ball milling beads into the ball mill tank according to the mass ratio of the ball to material at 20:1, and filter the 200 mesh sieve after ball milling for 1 hour to obtain the zeolite powder, mix the zeolite powder and fly ash according to the mass ratio Mix the mixed powder at 2:1 to obtain mixed powder; mix the mixed powder and absolute ethanol at a mass ratio of 1:5, place it on a shaker and oscillate and impregnate for 30 minutes, filter and separate to obtain a filter residue after the impregnation, and then put the filter residue in an oven. Dry at 105°C for 1 hour, and then obtain hydroxylated mixed powder after drying; take expired milk and bean curd dregs at a mass ratio of 1:5, mix and stir for 30 minutes to obtain a mixed slurry, place the mixed slurry in a bamboo sieve, and then put the bamboo sieve into the Put it into a greenhouse with a temperature of 35°C and a relative air humidity of 70%, a...

example 2

[0027] Weigh the zeolite and put it into the ball mill, add zirconia ball milling beads into the ball mill tank according to the mass ratio of the ball to material at 20:1, and filter the 200 mesh sieve after ball milling for 1 hour to obtain the zeolite powder, mix the zeolite powder and fly ash according to the mass ratio Mix the mixed powder at 2:1 to obtain mixed powder; mix the mixed powder and absolute ethanol at a mass ratio of 1:5, place it on a shaker and oscillate and impregnate for 35 minutes. Dry at 108°C for 1 hour, and then obtain hydroxylated mixed powder after drying; take expired milk and bean curd dregs at a mass ratio of 1:5, mix and stir for 35 minutes to obtain a mixed slurry, place the mixed slurry in a bamboo sieve, and then put the bamboo sieve into the Put it into a greenhouse with a temperature of 40°C and a relative air humidity of 75%, and let it stand for 8 days to get moldy mixed pulp; mix the hydroxylated mixed powder with moldy mixed pulp and wat...

example 3

[0029] Weigh the zeolite and put it into the ball mill, add zirconia ball milling beads into the ball mill tank according to the mass ratio of the ball to material at 20:1, and filter the 200-mesh sieve after ball milling for 2 hours to obtain the zeolite powder. Mix the mixed powder at a ratio of 2:1 to obtain a mixed powder; mix the mixed powder and absolute ethanol at a mass ratio of 1:5, place it on a shaker and oscillate and impregnate for 40 minutes, filter and separate the filter residue after the impregnation, and then put the filter residue in an oven. Dry at 110°C for 2 hours, and obtain hydroxylated mixed powder after drying; take expired milk and bean curd dregs at a mass ratio of 1:5, mix and stir for 40 minutes to obtain a mixed slurry, place the mixed slurry in a bamboo sieve, and then put the bamboo sieve into the Put it into a greenhouse with a temperature of 45°C and a relative air humidity of 80%, and let it stand for 9 days to get moldy mixed pulp; mix the h...

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Abstract

The invention relates to the technical field of foundation reinforcing, in particular to a method for reinforcing a liquefied sand foundation through zeolite and coal ash. According to the method, thezeolite and the coal ash are jointly mixed and ground, and hydroxylation modification is carried out through absolute ethyl alcohol; hydroxylated mixed powder, overdue milk rich in protein and tofukasu are mixed, mildewed, sealed and fermented; microorganisms are used for degrading the milk and the tofukasu, and a large number of radical groups are generated; under the action of the microorganisms, the radical groups are introduced into a hydroxylated mixture; and hydrogen bond adsorption and chemical bonding occur on the radical groups on the surface of the mixture and particle surfaces of liquefied sand, a cross-linked network reinforcing layer is formed in the sand foundation, and therefore the sand is reinforced. According to the method, microorganisms for generating urease are addedinto the reinforcing materials, a mineralization effect is achieved through the microorganisms, carbonate crystals are induced to deposit in the liquefied sand, formed high-strength calcium carbonatecrystals achieve a filling and supporting effect on the sand, the reinforcing effect is further improved, and the application prospects are wide.

Description

technical field [0001] The invention relates to the technical field of foundation reinforcement, in particular to a method for reinforcing liquefied sand foundations by utilizing zeolite and fly ash. Background technique [0002] The fatigue life and working performance of weak foundations, especially those containing liquefiable soil layers, are not optimistic under the reciprocating action of increasing traffic loads (high speed, heavy load). If the bearing capacity of the foundation soil is deteriorated and insufficient, or even liquefied, it may cause engineering disasters related to liquefaction, such as roadbed subsidence, pile foundation bending and shear failure, underground pipelines and tunnels floating, slope instability, and coastal or river bank failures. Excessive erosion and other diseases will affect the performance of its transportation function. [0003] However, the traditional method of liquefied foundation improvement needs to be improved and improved u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/12
CPCE02D3/12
Inventor 高玉梅林茂兰
Owner 上海先科桥梁隧道检测加固工程技术有限公司
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