Method for preparation of rich slurry vibrating cemented sand and gravel and its use in anti-seepage protection structure construction

Abstract

The invention discloses preparation of rich-paste vibration cemented sand gravel and a method for constructing an anti-seepage protection structure. The natural sand gravel is collected on the construction site, the water-binder ratio is determined according to the diamond belt theory, the screened sand gravel master batch is primarily mixed with water, cement, pulverized fuel ash and an additive proportionally to prepare the cemented sand gravel, the cemented sand gravel is transported to the position near to a pouring bin and is secondarily mixed with a cement paste proportionally, and finally the mixture is put in the bin and is manually vibrated. Based on the construction cost and the environment, the sand gravel near the dam site is used, the use amount of a binding material is increased on the basis, the rich-paste vibration cemented sand gravel is taken as the anti-seepage protection structure of a cemented sand gravel dam, no aggregate preparation equipment is arranged on the construction site, the construction cost is controlled, and the original purpose of taking the cemented sand gravel dam as an environmentally friendly dam is fulfilled, and the problem that a paste liquid is not evenly distributed when the paste is manually added and vibrated on the surface of the bin and the honey-comb and blasted surface appears after form removal are avoided.

Description

technical field [0001] The invention relates to the technical field of construction of cemented sand and gravel dams, in particular to a method for preparing cemented sand and gravels with rich slurry and vibrating them and for construction of anti-seepage protective structures. Background technique [0002] As a new type of dam, the cemented sand and gravel dam has been widely used in temporary projects such as cofferdams in China. However, its application in permanent engineering is still in its infancy, and its long-term durability index is relatively low due to its small amount of cementitious materials and low requirements for sand and gravel aggregates. In the application of water conservancy and hydropower projects, as long as the dam body is equipped with an effective anti-seepage protection structure, its internal structure is basically in a dry state, and it will basically not be affected by freezing and thawing. However, at the project site, cemented sand and gra...

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the object of the present invention is to provide a preparation method of rich slurry vibrating cemented sand and gravel and its construction method for anti-seepage protection structure. As an environment-friendly dam, it can avoid problems such as uneven distribution of grout during manual grouting and vibration, and honeycomb pockmarks after formwork removal.

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