摘要
基于多层采空区的复杂建设用地,利用已有的勘察结果,以地表变形计算的残余沉降量作为已知的结果,通过综合岩石试验的结果及工程类比经验,将地质模型中各类岩组赋予适当的物理力学性质参数,进行反复试算、调整,最大限度地按照实际地质体的地质条件和工程条件反演地质体材料属性参数,建立多层复杂的采空区的地质模型。通过数值模拟计算结果显示,采空区进行注浆处理后,选择适当的基础型式,则有无建筑物条件下的地面沉降变形值均很小,且变化不大。这些方法可以有效地预测在建筑物荷载作用下采空区的沉降变形,为评价场地的工程地质稳定性和工程建设适宜性。
Base on the complicated construction land above the multi strata goal and with the application of the existing survey achievements, the residue subsidence value calculated with the surface deformation could be the known results. With the comprehensive the rock test results as well as the project analogy experiment, the suitable physical mechanics property parameters of the each rock group in the geological model were repeatedly calculated and adjusted. Base on the geological conditions and project condition of the actual geological mass at maximum, the material attribute parameters of the geological mass were reversed. A geological model of the complicated goal in the multi strata was established. The calculation results of the numerical simulation showed that after the goal was grouted, a suitable basis mode was selected. Under the non building circumstances, the surface ground subsidence and deformation values were all in small and there was no big variation. Those methods could be effectively to predict the subsidence and deformation of the goal under the building structures loading, which could evaluate the project geological stability and project construction suitability of the project site.
出处
《煤炭科学技术》
CAS
北大核心
2009年第4期98-102,共5页
Coal Science and Technology
关键词
多层采空区
三维数值模拟
沉降变形
稳定性
multi strata goal
3D numerical simulation
subsidence deformation
stability
