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A kind of mixture of cemented sand and gravel dam and its application

A technology for cemented sand-gravel dam and mixture, which is applied in dams, buildings, infrastructure engineering, etc., can solve the problems of poor permeability resistance of cemented sand-gravel dams, and achieves improved stability and impermeability performance, good stability resistance and penetration resistance, overcoming compaction and localized cracks

Active Publication Date: 2019-09-03
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned prior art, the present invention provides a mixture of cemented sand and gravel dams and its application in the construction of cemented sand and gravel dams to solve the technical problem of poor permeability resistance of cemented sand and gravel dams

Method used

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  • A kind of mixture of cemented sand and gravel dam and its application
  • A kind of mixture of cemented sand and gravel dam and its application
  • A kind of mixture of cemented sand and gravel dam and its application

Examples

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Effect test

Embodiment 1

[0059] A mixture of cemented sand and gravel dams, comprising component A and component B, wherein:

[0060] Component A includes the following components by mass: 100 parts of aggregate, 1 part of cement, 8 parts of urea, and 3 parts of ammonium bicarbonate;

[0061] Component B comprises the following components by volume: 1 part of microbial bacterial liquid, 2.5 parts of calcium chloride solution, 0.8 part of magnesium chloride solution, and 0.7 part of Tris solution; the bacterial strains in the microbial bacterial liquid are Bacillus pasteurianus and Bacillus pumilus, Their activity is greater than 0.5mmol·min -1 ; Calcium chloride solution, magnesium chloride solution and Tris solution concentrations were 3mol / L, 1mol / L, 1mol / L.

[0062] Use the prepared mixture to build a cemented sand and gravel dam with a dam body height h of 5m, a dam top surface width b of 3m, and a dam slope slope angle of 60°. Calculated by the following formula, the dam bottom surface width It...

Embodiment 2

[0071] A mixture of cemented sand and gravel dams, comprising component A and component B, wherein:

[0072] Component A includes the following components by mass: 100 parts of aggregate, 0 parts of cement, 10 parts of urea, and 4 parts of ammonium bicarbonate;

[0073] Component B includes the following components by volume: 1 part of microbial bacterial liquid, 3 parts of calcium chloride solution, 1 part of magnesium chloride solution, and 1 part of Tris solution; the bacterial strains in the microbial bacterial liquid are Bacillus pasteurianus and Bacillus pumilus, Their activity is greater than 0.5mmol·min -1 ; Calcium chloride solution, magnesium chloride solution and Tris solution concentrations were 3mol / L, 1mol / L, 1mol / L.

[0074] Use the prepared mixture to build a cemented sand and gravel dam with a dam body height h of 5m, a dam top surface width b of 3m, and a dam slope slope angle of 45°. Calculated by the following formula, the dam bottom surface width It is 1...

Embodiment 3

[0083] A mixture of cemented sand and gravel dams, comprising component A and component B, wherein:

[0084] Component A includes the following components in parts by mass: 100 parts of aggregate, 2 parts of cement, 5 parts of urea, and 2 parts of ammonium bicarbonate;

[0085] Component B includes the following components by volume: 1 part of microbial bacterial liquid, 3 parts of calcium chloride solution, 1 part of magnesium chloride solution, and 0.5 part of Tris solution; the bacterial strains in the microbial bacterial liquid are Bacillus pasteurianus and Bacillus pumilus, Their activity is greater than 0.5mmol·min -1; Calcium chloride solution, magnesium chloride solution and Tris solution concentrations were 2mol / L, 0.5mol / L, 2mol / L.

[0086] Use the prepared mixture to build a cemented sand and gravel dam with a dam body height h of 5m, a dam top surface width b of 3m, and a dam slope slope angle of 50°. Calculated by the following formula, the dam bottom surface wid...

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Abstract

The invention discloses a mixture for gelled gravel dam and an application thereof. The mixture comprises a component A and a component B which are independently stored, wherein the component A comprises aggregates, cement, urea and ammonium hydrogen carbonate, and the component B comprises microbial liquid, a calcium chloride solution, a magnesium chloride solution and a Tris solution; and when in use, the component A and the component B are mixed according to a weight ratio of (10 to 15): 1. When the mixture is used for building the gravel dam, the component A is first mixed with water to prepare a base material, then the component B is mixed with the base material to obtain the dam building material, then the dam building material is gradually laid among the pre-built baffle plates layer by layer to be treated such as rolling, thus completing the building of the gravel dam. By adopting the mixture and method of the invention, the technical problem of poor seepage resistance of the gelled gravel damp can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of dams, and in particular relates to a mixture of cemented sand and gravel dams and its application in the construction of cemented sand and gravel dams. Background technique [0002] The cemented sand gravel dam is a new type of dam between concrete (including roller compacted concrete) dams and earth rock dams. 1. Stone materials are cemented granular materials with certain strength and shear resistance formed after simple mixing, paving, vibrating rolling or pouring and pounding. It has the characteristics of no collapse, environmental friendliness, strong adaptability, fast construction and low cost. [0003] However, aggregates in the construction of cemented sand and gravel dams are generally not washed and screened, and the amount of cementitious materials is low, the amount of admixtures is high, and the Ca(OH) in hydration products 2 Therefore, under the long-term penetration of pressure water, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00E02B7/04E02D15/02C04B111/27
Inventor 贾金生郑璀莹史婉丽汪洋刘中伟李曙光吴洋锋丁廉营
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES