摘要
在"鸡爪"偏压地形中,目前的施工顺序基本是按从外到内、支护参数基本是内外一样的设计和施工工序,从而引发了不少山体滑坡、隧道开裂及坍塌等安全事故,因此,本文根据隧道所处潜在滑坡体的位置,运用有限元分别计算了隧道左右洞全部在滑坡体中、外洞在滑坡体中、内洞在滑坡体外及隧道左右洞全部在滑坡体外的工况,通过安全系数和塑性区分布大小的比较,从而得出了先行洞的优先原则和支护结构优化的一些结论,期望为以后的隧道设计及施工提供参考。
In bias terrain, the design and construction processes for current construction is based on the sequence from outside to inside and the parameters of internal and external supports are the same, which led to many safety incidents shuch as cracking landslides, tunnel collapse, So, according to the location of potential landslides of tunnel, this paper using finite element calculates holes all around the tunnel in the landslide boby, outside hole in the landslide and inner hole outside the landslide holes all around the tunnel outside the landsile. Then, this paper gets the priority to structural optimization and support through the safety factor and the distribution of plastic zone. It is hoped to give reference for the future design and construction.
出处
《地下空间与工程学报》
CSCD
北大核心
2009年第6期1398-1402,共5页
Chinese Journal of Underground Space and Engineering
关键词
偏压地形
开挖顺序
支护结构
安全系数
塑性区
bias terrain
excavation sequence
supporting structure
safety factor
plastic zone
