Abstract
ABSTRACT Many influencing factors should be considered in the selection of deep foundation pit supporting scheme. And the impact of different factors on supporting scheme is difficult to measure. There is a grey correlation between many influencing factors and the selection of supporting schemes. In this paper, the multi-objective fuzzy grey relation projection method can be obtained by weighting method and used to select the support of foundation pit. Therefore, a set of corresponding evaluation indexes of deep foundation pit support is put forward and the weight of each evaluation index is given. Then the weight is brought into the multi-objective fuzzy grey relation projection method to select the supporting mode of foundation pit. This method is applied to the selection of the supporting mode of the foundation pit of sand-pebble station, and the optimal supporting mode is obtained. The results is as follows : (1) It is effective to select the supporting scheme of foundation pit by fuzzy grey relational projection method. (2) The evaluation index of deep foundation pit supporting is reasonable. (3) It is of certain reference value to adopt bored pile + steel support method for sandy pebble foundation pit.
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