摘要
为了定量化评估运营盾构隧道健康状态,需要考虑结构病害对其安全性、耐久性和适用性的综合影响。将盾构隧道常见病害成因分为管片错位、衬砌材质劣化以及渗漏水等6个子系,对每个子系构建了病害故障树;从工程应用角度出发,从故障树中选取了23个可定量化因素作为评价指标,通过层次分析法建立了三层病害评价指标体系;对体系中单一评价指标的定量化分级方法进行简述,并给出所有指标的建议分级标准,采用改进的层次分析法-乘积标度法确定了各评判指标之间的相对权重;确定了基于Cauchy分布模型的隶属函数的关键参数。本方法修正了单因素诊断指标的片面性,考虑了多种病害对隧道结构综合作用,对"亚健康"的隧道结构的健康状态也能进行有效的定量化评价。
In order to quantitatively assess the health status of shield tunnel, all of the structural defections and their influences on the security, durability and serviceability of tunnel should be taken into account. The causes of shield tunnel defections could be divided into six branches ： the segment dislocations, lining material deterioration and seepage, etc. Fault trees are also founded to illustrate each branch. 23 quantitative elements from the fault trees are selected to serve as the diagnosis indexes, all of which could be applied in engineering practice. By using the AHP （ Analytic Hierarchy Process ） method, a 3 - level diagnosis index system is established. Afterwards, the procedure of setting up the quantitative judging criteria is given, as well as the relative index weight of index layer, by using the improved Analytic Hierarchy Process - multiplication scale method. At last, the values of corresponding parameters of membership functions are set, with the Cauchy distribution model. This paper modifies the single element diagnosis index to avoid the one - sideness, it could be as an effective approach to quantitatively assess the health status of shield tunnel under ＂Subhealth Status＂.
出处
《地下空间与工程学报》
CSCD
北大核心
2010年第1期201-207,共7页
Chinese Journal of Underground Space and Engineering
基金
上海科学技术委员会科研计划项目"上海长江隧桥工程养护管理及数字化研究"(07DZ12059)
关键词
盾构隧道
病害
定量化
综合评价
诊断指标体系
shield tunnel
defection
quantitation
comprehensive assessment
diagnosis index system
