沙漏型岩溶地面塌陷物理模型

发布时间：2018-05-28 03:33

本文选题：岩溶地面塌陷 + 沙漏型塌陷　；参考：《中国岩溶》2017年01期

【摘要】：为了进一步研究覆盖型岩溶地面塌陷的发生条件和机理,在作者关于土体塌陷理论的基础上,着重研究了渗漏型地面塌陷的地质现象、地质模型、物理模型及其数学表达式。根据地质现象和砂性土中砂颗粒在塌陷过程中的运动学响应特征,建立沙漏型岩溶地面塌陷的地质模型。在此基础上,概化出物理模型,并根据物质守恒定律推演沙漏型塌陷的数学表达式。由此探讨了沙漏型塌陷规模与岩溶和水文地质条件的关系,认为沙漏型塌陷历时与砂性土的摩擦系数的平方、水力坡降的平方根及可溶岩洞径的8/3次方根成反比,与塌陷坑深度的立方成正比。文章从地质现象→地质模型→物理模型→数学表达式来研究沙漏型岩溶地面塌陷,地质理论依据充分,物理过程可靠,数学逻辑严密,所推导出的数学表达式较好地反映了沙漏型地面塌陷的基本规律。经工程案例验证,该物理力学模型与实际情况较为吻合。
[Abstract]:On the basis of the author's theory of soil collapse, the geological phenomena, geological models, physical models and their mathematical expressions are emphatically studied on the basis of the authors' theory of soil collapse, and the kinematic response of sand particles in the process of collapse in the sand soil is especially based on the author's Theory of soil collapse. The geological model of the hourglass type karst ground collapse is established. On this basis, the physical model is generalized and the mathematical expression of the hourglass type collapse is deduced according to the law of conservation of material. The relationship between the scale of the hourglass type and the karst and the hydrogeological conditions is discussed, and the square of the friction coefficient of the hourglass type collapse and the sand soil is considered. The square root of the hydraulic gradient is inversely proportional to the 8/3 square root of the soluble rock hole, and it is directly proportional to the cube of the depth of the collapse pit. The article studies the hourglass karst ground subsidence from the geological phenomenon, the geological model, the physical model and the mathematical expression. The geological theory is sufficient, the physical process is reliable, the mathematical logic is strict, and the mathematical table derived is derived. The basic law of hourglass ground collapse is better reflected by the Da formula. The engineering case proves that the physical and mechanical model is in good agreement with the actual situation.
【作者单位】：长江岩土工程总公司;
【基金】：武汉地铁岩溶专题勘察项目
【分类号】：P642.26

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