津浦铁路泰安路基塌陷研究与防治

STUDY ON GROUND COLLAPSE IN TAI-AN STATION OF JIN-PU RAILWAY LINE

本文对津浦铁路泰安路基塌陷机理及产生条件进行了剖析,并据此制定了稳定性分区标准,为工程整治提供了可靠依据。

This paper discussed ground collapse occurred in Tai-an Railway Station, about its formation conditions, mechanics, Stability assessment and measures for controlling it. Firtly, the geological environment of Tai-an region was introduced in detail, especially emphasied on Cambrian and Ordovician linestone formations and their petrological characteristics, development of karst in them, as well as Quaternary formation and their physico-mechanical properties. Secondary, the hydrogeological condition of this region was analysed. Based on above discussion, the genesis and mechamies of ground collapse in Taian station were taken into approach, the view was that, because of ovec pumping of groundwater, the water level dropped in great range up to 38m as maximum. Thus a depression cone was formed with the center at Daimiao. In the process of water level dropping, suffusion took place in covering soil layers. This was the principal factor of forming ground collapse. In the meanwhile, suffosion of permeating rain water and process of vacuum attracting erosion also played important role in the function of speeding up the collapse. In this paper also tried for zoning of stability based on the relation between three factors: caves, soil and water, put foreward suggestions cotrol measures for ground collapse.