Evaluating Construction Risks of Modified Shield Machine Applicable to Soft Soils Based on Fuzzy Comprehensive Evaluation Method

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Degree</td><td class="align_center">Valuation</td><td class="align_center">Description</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Rare</td><td class="align_center">1</td><td class="align_center">The risk is rarely seen</td></tr><tr><td class="align_left">Occasional</td><td class="align_center">2</td><td class="align_center">The risk is unlikely to happen</td></tr><tr><td class="align_left">Possible</td><td class="align_center">3</td><td class="align_center">The risk may happen</td></tr><tr><td class="align_left">Anticipated</td><td class="align_center">4</td><td class="align_center">The risk may happen repeatedly</td></tr><tr><td class="align_left">Frequent</td><td class="align_center">5</td><td class="align_center">The risk may happen frequently</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr><tr class="table-fn"><td><div>where 1.5, 2.5, 3.5, and 4.5 indicate that the probability of occurrence of the risk event is between the adjacent levels.<br/></div></td></tr></table>

<div>Probability valuation of risk occurrence.</div>

Mathematical Problems in Engineering

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Table 3

Table 3: Evaluating Construction Risks of Modified Shield Machine Applicable to Soft Soils Based on Fuzzy Comprehensive Evaluation Method 