泰安市岩溶地面塌陷动力诱导因素分析

Analysis of the Power-induced Factors of the Karst Land Collapse in Tai'an City

以泰安市岩溶地面塌陷的分布特征和形成塌陷的基本条件为基础,分析岩溶地面塌陷的直接诱导因素,认为水位降深越大,导致水力坡度增加,塌陷也相应增多;降雨导致的积水既增加了上部荷载,下渗时还会将上覆盖层中的部分黏土颗粒带走,承载力降低;振动诱发岩溶塌陷的实质是振动所产生的附加应力诱发地面塌陷,振动致塌机制和耦合效应与破坏累积有关。

Tai＇an city is an easy happening area of karst land collapse. Based on the distribution characteristics of Tai＇an karst land collapse and the basic forming conditions and analyzing direct factors to induce the karst land collapse, it is regarded that deep water level leads to increasing hydraulic gradient, and increasing land collapse. Surface water caused by rain not only increased the upper part of the load, but also taking away some clay particles in the surface and to reduce carrying capacity. Vibration generated by the additional stress induced collapse on the ground, and vibration induced collapse mechanism and the coupling effect have relation with damage accumulation.