文献类型：期刊文献

中文题名：Design of the yielding support used highly deformable elements for a tunnel excavated in squeezing rock

英文题名：Design of the yielding support used highly deformable elements for a tunnel excavated in squeezing rock

作者：Tian, Hong-ming[1];Tian, Yun[2];Chen, Wei-zhong[1];Tan, Xian-jun[1];Shu, Xiao-yun[3];Liu, Xia-lin[4]

机构：[1]Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China;[2]Shaoxing Univ, Sch Civil Engn, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China;[3]Hohai Univ, Coll Civil & Transportat Engn, Nanjing 210024, Peoples R China;[4]China Commun Second Highway Survey & Design Inst C, Wuhan 430058, Peoples R China

年份：2023

卷号：20

期号：5

起止页码：1458

中文期刊名：山地科学学报(英文)

外文期刊名：JOURNAL OF MOUNTAIN SCIENCE

收录：SCI-EXPANDED(收录号：WOS:001001382100018)、CSTPCD、、CSCD2023_2024、Scopus(收录号：2-s2.0-85160083029)、WOS、CSCD、PubMed

基金：AcknowledgementsThe authors gratefully acknowledge the support of the National Natural Science Foundation of China (Grant Nos. 52179113, 51991392 and 52279119), the Second Comprehensive Scientific Expedition on the Tibetan Plateau (No. 2019QZKK0904).

语种：英文

中文关键词：Highly deformable elements;Squeezing tunnel;Yielding support;Strain-softening behavior

外文关键词：Highly deformable elements; Squeezing tunnel; Yielding support; Strain-softening behavior

中文摘要：Yielding support is often used in the squeezing tunnel to prevent damage to the lining induced by large deformation of the surrounding rock.Highly Deformable Elements(HDE)which is often installed along the circumferential direction of the shotcrete lining is a common type of yielding support.To determine the yield parameters of HDE,the support characteristic of the lining using HDE and the ground pressure considering strain-softening of soft rock were analyzed by an analytical method.The analytical solution showed that when considering the strain-softening of squeezing ground,the ground pressure has a non-zero minimum value.The minimum value of ground stress can be used to determine the constant yield stress of the HDE,and the corresponding deformation of the minimum ground pressure can be used to determine the deformation capacity of the HDE.Based on the variation in the design constant yield stress and yield displacement of HDE with the in-situ stress and the mechanical parameters of the soft rock,equations were proposed for determining of the yield parameters of the HDE.

外文摘要：Yielding support is often used in the squeezing tunnel to prevent damage to the lining induced by large deformation of the surrounding rock. Highly Deformable Elements (HDE) which is often installed along the circumferential direction of the shotcrete lining is a common type of yielding support. To determine the yield parameters of HDE, the support characteristic of the lining using HDE and the ground pressure considering strain-softening of soft rock were analyzed by an analytical method. The analytical solution showed that when considering the strain-softening of squeezing ground, the ground pressure has a non-zero minimum value. The minimum value of ground stress can be used to determine the constant yield stress of the HDE, and the corresponding deformation of the minimum ground pressure can be used to determine the deformation capacity of the HDE. Based on the variation in the design constant yield stress and yield displacement of HDE with the in-situ stress and the mechanical parameters of the soft rock, equations were proposed for determining of the yield parameters of the HDE.