Optimization of CSG dam profile based on response surface methodology

Ding, Zelin; Xue, Jianghan; Zhu, Xuanyi; Wang, Jing

doi:10.1016/j.cscm.2022.e01430

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…This complexity arises due to notable differences between CSGR and CVC or GERCC in expansion coefficient, elastic modulus, and hydration heat parameters. Consequently, ensuring quality control during construction is often a cause for concern [9][10][11]. Hence, a novel approach is suggested: incorporating vibrated grout-enriched CSGR in constructing the protection and seepage control layer of the CSGR dam.…”

Section: Introductionmentioning

confidence: 99%

A New Method for Constructing the Protection and Seepage Control Layer for CSGR Dam and Its Application

Wu,

Jia,

Zheng

et al. 2024

Applied Sciences

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Effective seepage control is crucial for maintaining the structural integrity of Cemented Sand, Gravel and Rock (CSGR) dams. Traditional methods using conventional concrete (CVC) or grout-enriched roller-compacted concrete (GERCC) are costly and disruptive. This paper presents a novel technique for constructing the protection and seepage control layer in Cemented Sand, Gravel and Rock (CSGR) dams. The method involves grouting and vibrating the loosened Cemented Sand, Gravel and Rock (CSGR) material to create vibrated grout-enriched Cemented Sand, Gravel and Rock, which performs similarly to concrete. A new surface water stop structure has also been developed for the structural joints. Laboratory tests revealed that Cemented Sand, Gravel and Rock (CSGR) with a vibrating–compacted (VC) value of 2–6 s and a compressive strength of 4 MPa meets design requirements for medium and low dams when the slurry addition rate is 8–12%. The T-shaped surface water stop demonstrated a bonding strength of over 1.8 MPa, withstanding a water pressure of 1.6 MPa. This method, integrated with dam body construction, reduces material costs by about 50% and eliminates construction interference. Specialized equipment for this technique has been developed, with a capacity of 12 m2/h. Implemented in the Minjiang Navigation and Hydropower Qianwei Project and Shaping I Hydropower Station, it has shown significant economic, environmental and safety benefits, promoting sustainable dam construction.

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Section: Introductionmentioning

confidence: 99%

A New Method for Constructing the Protection and Seepage Control Layer for CSGR Dam and Its Application

Wu,

Jia,

Zheng

et al. 2024

Applied Sciences

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“…Since the last two decades, many hardfill dams and road embankments have been constructed around world concerning many extensive advantages in comparison with conventional embankments [2][3][4][5][6][7]. While the technology of hardfill dams was established in recent decades, many researchers focused on developing and optimizing new aspects of hardfill dam design [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

The strength and microstructure of cemented sand-gravel (CSG) mixture containing fine-grained particles

Karimi

Aghajani

2023

Geo-Engineering

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The hardfill embankments are composed of cemented sand-gravel (CSG) mixtures. In some cases, however, sand and gravel used in the mixture contain fine-grained fraction. This paper aimed to study the mechanical behavior and microstructure of CSG mixtures in which the base soil contains fine-grained particles with different plasticity specifications. Various contents of kaolinite and bentonite were added to a sand-cement mixture with different cement contents and uniaxial strength and deformation modulus in the mixtures were measured at two curing ages. According to the results, in low cement mixtures, the mixture containing 10% of the additive exhibited the maximum strength and deformation modulus, regardless of the additive type. In a family of bentonite-containing mixtures with higher cement, the strength of mixtures decreased with increasing the bentonite content. However, the mixture with higher cement and 10% of kaolinite presented the best performance from in terms of strength and stiffness. Analyzing the mineralogy and SEM images of mixtures showed that the structure of base soil attained the best packing and a strong matrix was devolved inside the mixture with 10% of fine additive. Furthermore, the kaolinite particles in the mixture containing 10% kaolinite contributed to the hydration process of cement.

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A new solution for water-tightening of the cemented sand-gravel (CSG) hardfill dams

Karimi

Aghajani

2023

Innov. Infrastruct. Solut.

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Optimization of CSG dam profile based on response surface methodology

Cited by 3 publications

References 14 publications

A New Method for Constructing the Protection and Seepage Control Layer for CSGR Dam and Its Application

A New Method for Constructing the Protection and Seepage Control Layer for CSGR Dam and Its Application

The strength and microstructure of cemented sand-gravel (CSG) mixture containing fine-grained particles

A new solution for water-tightening of the cemented sand-gravel (CSG) hardfill dams

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