Integrated compaction control based on the motion behavior of a deep vibrator

Nagy, Péter; Pistrol, Johannes; Kopf, Fritz; Adam, Dietmar

doi:10.1016/j.trgeo.2021.100539

Cited by 4 publications

(1 citation statement)

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“…This contrast is particularly evident in medium and low dams, where narrow construction sites and faster filling speeds are common requirements. The grouting and vibrating equipment designed for RCC dams [23][24][25] cannot be directly applied to CSGR dams because, unlike RCC, CSGR dam materials exhibit variation depending on the available material type for excavation in the reservoir area or nearby locations, and typically lack a fixed gradation. The maximum particle size is 150 mm for dams and up to 300 mm for cofferdam construction; hence, there is high fluctuation in mud and water content during mixing.…”

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%