A solution for squeezing deformation control in tunnels using foamed concrete: A review

被引：59
作者：
Wu, Kui [1 ,2 ]
Shao, Zhushan [1 ,2 ]
Qin, Su [1 ,2 ]
机构：
[1] Xian Univ Architecture & Technol, Sch Civil Engn, Xian 710055, Peoples R China
[2] Xian Univ Architecture & Technol, Shaanxi Key Lab Geotech & Underground Space Engn, Xian 710055, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 257卷
基金：
中国国家自然科学基金;
关键词：
Foamed concrete; Squeezing tunnel; Constituent; Properties; Performance; COMPRESSIVE STRENGTH; CELLULAR CONCRETE; FLY-ASH; DRYING SHRINKAGE; FOAMING AGENT; LIGHTWEIGHT CONCRETE; THERMAL-PROPERTIES; SHOTCRETE LINER; BEHAVIOR; PERFORMANCE;
D O I：
10.1016/j.conbuildmat.2020.119539
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Foamed concrete possesses characteristics such as high deformability and low density. Using foamed concrete in tunnel support is able to absorb a certain amount of rock creep deformation and reduce lining pressure, providing a good solution to deal with large deformation problems in squeezing tunnels. The application of foamed concrete in tunnel support is structurally implemented in two ways. To provide a comprehensive insight into application of foamed concrete in squeezing tunnels, this paper explains the mechanism of squeezing deformation of tunnel, proposes the performance requirements for foamed concrete used in squeezing tunnels, and also summarizes the basic constituents and typical properties of foamed concrete. Furthermore, this paper reviews researches of the design and practical application of foamed concrete elements in tunnel support, covering such areas as the constitutive models of foamed concrete, the important design parameters of foamed concrete elements, and the performance of tunnels using foamed concrete elements. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：15
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