深基坑施工中周围管线沉降预测与关联因素分析

PREDICTION AND CORRELATION FACTOR ANALYSIS OF PIPELINE SETTLEMENT IN CONSTRUCTION OF DEEP FOUNDATION PIT

目前对深基坑周围管线沉降虽有一些监测手段和措施,但由于部分监测数据的缺失和监测数据的实时性,当监测数据反馈出规定的限值时,管线已经破裂或濒于破裂边缘,所以对深基坑周围管线沉降量的预测十分重要。天津地铁六号线换乘站深基坑施工中,对周围管线沉降进行风险预测,并利用灰色关联度理论来分析影响深基坑周围管线的关联因素,辅助了工程决策,为防灾减灾提供了科学依据。

At present, there are some means and measures of pipeline' settlement around deep excavation.However in the practice of engineering, due to the lack of monitoring data and real-time monitoring data, when monitoring data feedback out of the prescribed limit, and then rupture of the pipeline has happened already or it is on the edge of breakdown. so the prediction of subsidence of pipeline around the deep foundation pit is very important. This paper is designed to analyse the risk of construction, combining with six line of metro 'station of transfer, and making use of theory of the grey correlation analysis.Thus this paper aids engineering decision-making and provides scientific basis for disaster prevention and mitigation.