岩土力学Issue(11)：3229-3234,6.DOI:10.16285/j.rsm.2015.11.026
考虑二期荷载的高填明洞加筋减载土压力计算
Calculation of the earth pressure on the high fill open-cut tunnel with load-reduction reinforcement considering secondary loading
摘要
Abstract
With the rapid development of urban construction, new structures inevitably induce the secondary loading on the top of existing high fill open-cut tunnel. In order to characterize the influence of the new secondary loading due to backfilling on vertical earth pressure on the top of high fill open-cut tunnel, the relationship between the geogrid deformation and the soil settlement is established by using the elastic theory of soil settlement, based on the formulation of earth pressure on the load reduction structure. Meanwhile, the effect of the secondary loading is considered. The method for calculating vertical earth pressure on the top of high fill open-cut tunnel before and after the load reduction is further improved. Numerical analysis models are established, and the numerical results are compared with the results obtained from the proposed procedure in this paper. The results show that the theoretical results are close to the numerical results, with the same regularity. The load reduction measure has a great impact on the backfill earth pressure on open-cut tunnel. The higher the fill, the more significant the effect of load reduction, and the smaller the practical earth pressure on the top of open cut tunnel. The calculation of vertical earth pressure on the top of open-cut tunnel under the secondary loading should consider the influence of soil settlement rather than a simple superposition.关键词
高填明洞/二期荷载/土体沉降/加筋减载/土压力/土工格栅Key words
high fill open cut tunnel/secondary loading/soil settlement/load reduction by reinforcement/earth pressure/geogrid分类
建筑与水利引用本文复制引用
李盛,马莉,王起才,李建新,李善珍,张延杰..考虑二期荷载的高填明洞加筋减载土压力计算[J].岩土力学,2015,(11):3229-3234,6.基金项目
长江学者和创新团队发展计划资助（No.IRT1139）；国家自然科学基金青年基金项目资助（No.51408289，No.41402252）。@@@@Project supported by the Program for Changjiang Scholars and Innovative Research Team in University (Grant No.IRT1139) and the National Science Foundation of China (Grant Nos.51408289 and 41402252) （Grant No.IRT1139）
