Influence of different freezing modes on the base slab displacement of an upper structure
MetadataShow full item record
The high risk of metro tunnels that are underneath buildings in a water-rich layer has received much attention. The base slab of an upper structure deforms due to frost heave and settlement, which needs to be predicted before freezing and excavation. In this paper, simulation experiments with a similarity ratio of 1/25 were performed based on an engineering project where two tunnels underpass a running station through an artificial ground freezing method. The displacement of upper structures was analyzed under simultaneous and sequential freezing modes, with a simple formula proposed to estimate the frost heave in closely underpassing projects. It is shown that, under freezing and excavation stages, the base slab displacement displays a zigzag shape. These results are instructive to the construction of underpassing projects in a water-rich layer.
Showing items related by title, author, creator and subject.
Mitigation of heave response of semi-submersible platform (SSP) using tuned heave plate inerter (THPI)Ma, R.; Bi, Kaiming; Hao, Hong (2018)The undesirable motions resulting from wave loading can lead to the long-term fatigue damage or even catastrophic sinking of offshore semi-submersible platforms (SSP). It is therefore by all means necessary to suppress ...
Liu, Huihua; Nakagawa, K.; Chaudhary, Deeptangshu; Asakuma, Y.; Tade, Moses (2011)Freeze-dried macroporous foams were prepared from an aqueous colloidal suspension of chitosan/xanthangum/Na+-montmorillonite nanoclay (MMT). The suspension formed gel structure as a consequence of freezing, named cryogel. ...
A rigless coiled tubing based Subsea Well Light Intervention System (SWIS) for enhanced oilfield recoveriesCostello, David J. (2009)The objectives of this thesis are to describe the Subsea Well Intervention System (SWIS) andto test the hypothesis that this system has significant potential economic benefits over asemi-submersible rig-based system which ...