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工程力学  2014 

基于块体砌筑技术的大岗山高拱坝地质力学模型试验研究

, PP. 53-62

Keywords: 地质力学模型试验,块体砌筑技术,拱坝,整体稳定性,加固

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Abstract:

地质力学模型试验因能真实地模拟复杂地质构造,直观地反映破坏过程而成为研究地基及其上部结构稳定性和安全性的重要方法,广泛应用于高拱坝整体稳定和加固分析。采用块体砌筑技术不仅可以模拟裂隙岩体的变形和强度,而且能模拟坝基不连续结构面、坝体构造以及加固措施。将块体砌筑技术应用于基础处理的大岗山拱坝地质力学模型试验,结合加载和测量监测设备,得到拱坝坝体位移和应力的分布规律、坝体和坝基岩体的破坏机理及破坏过程。采用3个特征超载安全系数K1(起裂安全系数),K2(非线性变形安全系数)和K3(破坏安全系数)对大岗山拱坝整体稳定性进行了评价。通过与国内主要高拱坝模型试验的稳定性结果对比分析,说明大岗山拱坝整体稳定性和安全性均较高。通过与基础未处理的大岗山拱坝模型试验结果对比分析,说明基础处理措施具有明显的加固效果。

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