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基坑施工风险评价模型研究.doc
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基坑施工风险评价模型研究.doc
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摘 要
随着我国经济的飞速进展,多数都市正在修建或者立即修建地铁。
然而由于地铁施工受到周围阻碍多,地铁隧道施工风险具有多样性
和多层次性。应用网络分析法,对地铁隧道基坑施工过程中的成本
风险、环境风险、失效风险等各方面展开系统的分析和研究。并在
此基础上,对风险因素进行敏感性分析并提出相应的预防措施。
本文采纳网络分析法对基坑风险进行分析,首先将所有的风险因
素归纳为施工工艺风险、施工作业风险、施工环境风险和基坑本体
风险,每个分类都有六到七个风险因素,在此基础上对风险因素的
相互阻碍关系确定,依照阻碍关系通过计算确定权重。权重确定后
就能够对数据进行计算来得到结果。其结果有未加权超矩阵,加权
超矩阵和极限超矩阵。依照目的在其中选择所需要的矩阵进行归纳
分析得出结论。
在结果中,未加权超矩阵反映了各个元素组内部及之间的相互
阻碍关系,由此推断各元素组内的阻碍程度大小比较。加权超矩阵
是把有限于子系统内部指标之间的阻碍作用置于整个系统当中统一
进行考虑。加权超矩阵反映了各指标之间直接阻碍作用的排序。极
![](https://csdnimg.cn/release/download_crawler_static/86052348/bg2.jpg)
限超矩阵和加权超矩阵一样差不多上考虑了子系统内部指标至于整
个系统之中的阻碍,但极限超矩阵则是在考虑了各指标之间直接阻
碍作用后再考虑其间接阻碍的一个总的阻碍程度大小比较。
对计算结果进行分析,我们能够从中得出相应的结论。在基坑
施工中关于基坑而言,对其阻碍最大的因素是什么,哪一类因素组
对基坑的阻碍最大。借此我们能够针对性的提出预防和操纵措施。
关键词:基坑,风险因素,网络分析法,相对权重,施工期
ABSTRACT
With the rapid development of our economy, most of the
city is being built or will build the subway. But because
![](https://csdnimg.cn/release/download_crawler_static/86052348/bg3.jpg)
the subway construction by the surrounding influence,
subway tunnel construction risk has the diversity and
multi-level. Application of network analysis method,
analysis and Study on the process of system of subway
tunnel in foundation pit construction cost risk,
environmental risk, the risk of failure and other aspects.
And on this basis, conduct sensitivity analysis of the
risk factors and preventive measures.
The network analysis method was adopted to analyze the
risk of excavation, first of all risk factors into risk,
construction technology, construction of environmental
risk and operational risk risk foundation ontology, each
category has six to seven risk factors, on the basis of
risk because of the mutual effects between calculated and
determined according to the determined, weight effect
relationship. Weights can then calculated results of data.
The results are unweighted Super-matrix, weighted
![](https://csdnimg.cn/release/download_crawler_static/86052348/bg4.jpg)
super-matrix and ultimate super matrix. According to the
matrix to select the inductive analysis concluded.
In the result, the unweighted Super-matrix reflects the
interaction within the various elements of the
relationship between the group and, thus determine the
degree of each element in the group. The weighted
Super-matrix is limited to between internal index
subsystem effect in the whole system of unified
consideration. The weighted Super-matrix reflects the
index between direct influence ranking. The limit
Super-matrix and the weighted Super-matrix are considered
the effect of internal index system for the whole system,
but the limit Super-matrix is considering to consider each
index between the direct effects of the indirect effects
of a total impact degree.
Analysis of the results, we can draw the corresponding
conclusions from. In the construction of foundation pit
for foundation pit, the largest impact on the effect of
![](https://csdnimg.cn/release/download_crawler_static/86052348/bg5.jpg)
what is, what kind of factors on the pit maximum. Thus we
can put forward prevention and control measures.
Key words: foundation ditch, risk factor, Analytic Network
Process, relative weight, construction period
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