姑山铁矿复杂地层中多工艺防渗帷幕的设计

介绍了马钢集团的重要原料生产基地姑山铁矿复杂地层中防渗帷幕的设计和施工工艺及质量要求,给出了旋喷及摆喷加高压灌浆相结合的施工工艺的设计方案和工艺参数。实践证明,该方案和施工工艺是行之有效的。     

水下隧道周围土体及衬砌变形力学性状研究

以拟建的哈尔滨松花江隧道为例,直接针对隧道安全运营,采用因子对目标函数影响的优化思想,在假定不同工况的若干种设计模型下,考虑土体-衬砌相互作用及材料变形的非线性特性,建立尽可能逼近实际问题的有限元计算模型.基于 ANSYS 软件反复进行数值模拟实验,研究隧道周围土体及衬砌变形的力学性状,并据此预估隧道最危险破坏点,为合理确定隧道覆土层安全厚度提供理论依据.     

Simulation analysis of construction process of high rock slope＇ s stabilization

A self-developed elasto-plastic finite element program was used to analyze the construction sequence of high rock slope＇ s stabilization in a coal-coking plant, and the result was compared with that employing the ultimate equilibrium method. Based on the results of finite element analysis, the stress contour graphs and displacement vector graphs at different construction steps were obtained, and the behavior of the slope during stabilization construction process was analyzed quantitatively. Based on the analysis of safety factors of three different schemes of stabilization and two different construction schemes, the assessment of stability and bracing design of the construction process were performed. The results show that the original reinforcement design is improper; the stability of the rock slope is controlled by a developed structural plane, the stability factor after excavation is less than 1, and the free surface should be braced in time; for stability, the construction sequence should adopt that bracing follows excavation step by step up to down; the local slide occurred during the construction process agrees with the dangerous slide determined by the numerical analysis, which proves the validity and rationality of the adopted method.     

含软弱夹层岩坡的稳定性分析--以马钢"十一五"新区项目马三峰边坡为例

以马钢“十一五”新区项目马三峰边坡为例，对含软弱夹层的岩石边坡的控稳机制和稳定性进行了分析，结果表明，对顺层岩石边坡，其稳定性决定于软弱夹层的力学强度。     

水下隧道周围土体及衬砌变形力学性状研究

以拟建的哈尔滨松花江隧道为例，直接针对隧道安全运营，采用因子对目标函数影响的优化思想，在假定不同工况的若干种设计模型下，考虑土体-衬砌相互作用及材料变形的非线性特性，建立尽可能逼近实际问题的有限元计算模型．基于ANSYS软件反复进行数值模拟实验，研究隧道周围土体及衬砌变形的力学性状，并据此预估隧道最危险破坏点，为合理确定隧道覆土层安全厚度提供理论依据．     

桩-土间无厚度轴对称滑动面单刚矩阵的一种闭合解

在轴向荷载作用下，采用无厚度滑动面单元模拟桩-土之间相对滑动，方法简单、直接、概念清楚。针对桩-土相互作用的轴对称问题，从刚度矩阵的基本概念出发，对有厚度接触面进行简化，并沿桩周长积分，获得了适合于模拟桩-土之间相对滑动的无厚度滑动面单刚矩阵的一种精确闭合解，为其进一步应用提供了可靠的理论依据。分析表明，所获得的无厚度轴对称滑动面单刚矩阵的解，属于一种精确闭合解，且能更好地模拟桩-土圆筒形接触面的实际情况，这种精确闭合解便于在有限单元法中应用：平面滑动单元属于轴对称滑动单元的一种特殊形式，并且可由轴对称滑动单元统一表示，从而，很好地减少桩-土相互作用研究中数值模拟的单元类型，这对于节减剖分计算域与准备数据的工作量、缩短机时、提高计算效益等无疑具有重要意义。