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A platform for research: civil engineering, architecture and urbanism
Optimization and application of backfill grouting material for submarine tunnel
Highlights A new hardened cement-lime grouting material for the undersea shield tunnel is developed. The developed grouting material can provide a good working ability and anti-floating capacity. The applicability and effectiveness of HCLGM were verified in a field case.
Abstract The impacts of composition and mixture ratio of backfill grouts on the anti-floating ability and workability cannot be ignored in the submarine tunnel engineering. The orthogonal tests were adopted to design a new hardened cement-lime grouting material (HCLGM) and its physical properties were examined. The results show that the shear strength, density, consistency and bleeding rate of HCLGM are largely influenced by the water-binder ratio while the setting time is mainly affected by the cement-fly ash ratio. The recommended mixture ratio for grouting material was determined by linear regression analysis method which is sand of 16.3%, cement of 6.6%, slaked lime of 13.4%, fly ash of 26.5%, bentonite of 4.8% and water of 32.4%. The proposed HCLGM was used in a practical engineering case and contributed to the anti-floating capacity of tunnels.
Optimization and application of backfill grouting material for submarine tunnel
Highlights A new hardened cement-lime grouting material for the undersea shield tunnel is developed. The developed grouting material can provide a good working ability and anti-floating capacity. The applicability and effectiveness of HCLGM were verified in a field case.
Abstract The impacts of composition and mixture ratio of backfill grouts on the anti-floating ability and workability cannot be ignored in the submarine tunnel engineering. The orthogonal tests were adopted to design a new hardened cement-lime grouting material (HCLGM) and its physical properties were examined. The results show that the shear strength, density, consistency and bleeding rate of HCLGM are largely influenced by the water-binder ratio while the setting time is mainly affected by the cement-fly ash ratio. The recommended mixture ratio for grouting material was determined by linear regression analysis method which is sand of 16.3%, cement of 6.6%, slaked lime of 13.4%, fly ash of 26.5%, bentonite of 4.8% and water of 32.4%. The proposed HCLGM was used in a practical engineering case and contributed to the anti-floating capacity of tunnels.
Optimization and application of backfill grouting material for submarine tunnel
Mao, Jia-hua (author) / Yuan, Da-jun (author) / Jin, Da-long (author) / Zeng, Jian-feng (author)
2020-07-14
Article (Journal)
Electronic Resource
English
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