Open AccessTreatment Technology of Closed Tunnel Filled with Water
Author(s) -
Weisheng Rao,
Dejie Li,
Jiacheng Li,
Longjian Feng
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/783/1/012049
Subject(s) - settlement (finance) , heading (navigation) , drilling , engineering , underwater , tunnel construction , drilling rig , civil engineering , shield , borehole , geotechnical engineering , geology , computer science , mechanical engineering , petrology , oceanography , world wide web , payment , aerospace engineering
During the construction of No.3 connection gallery between huyong station and lvdaohu station of first phase project of Line 2 Foshan Rail Transit, water and sand kicks caused the large-scale settlement of tunnel segments. After comparison and selection of schemes, the rehabilitation scheme of abandoning the existing right line tunnel, shield machine starting from huyong station and heading to Lvdaohu Station by changing the line, is finally adopted. In order to prevent secondary disasters caused by the collapse of abandoned tunnels, the ground boreholes are used to fill the abandoned tunnels. During the construction, a series of key construction technologies have been formed, such as sectional backfill of abandoned tunnel, alternate backfill of underwater concrete and mortar, and prevention of pipe blockage. The results of core-drilling test and subsequent construction procedures show that the treatment scheme of abandoned tunnel is reliable and feasible, which can provide reference for similar projects.