Optimization and application of backfill grouting material for submarine tunnel

被引：52

作者：

Mao, Jia-hua ^{[1
,2
]}

Yuan, Da-jun ^{[1
,2
]}

Jin, Da-long ^{[1
,2
]}

Zeng, Jian-feng ^{[1
,2
]}

机构：

[1] Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China

[2] Beijing Jiaotong Univ, Key Lab Urban Underground Engn, Educ Minist, Beijing 100044, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 265卷

基金：

中国国家自然科学基金;

关键词：

Grouting material; Shield tunneling; Submarine tunnel; Formulation optimization; Anti-floating; FLY-ASH; SHIELD TUNNEL; SLURRY SHIELD; CEMENT; PERFORMANCE; BENTONITE; STRENGTH; MODEL; SOIL; MICROSTRUCTURE;

D O I：

10.1016/j.conbuildmat.2020.120281

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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 antifloating capacity of tunnels. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：12

共 48 条

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