附属

They have one of the most awe-inspiring collections of stalagmites and stalactites found in the United States. A stalagmite is a cone-shaped mineral deposit that forms upward; a stalactite forms downward.

其为美国境内少数生有令人惊叹的石笋及钟乳石洞穴之一；因矿物沉淀而成的圆锥状石笋由下向上增高；而钟乳石则由上而下延伸。

How to deal with the restrictions of deep excavation is a very difficult problem. This paper analyzes the restrictions of pile-support structure detailedly, uses a castigatory function to deal with the restrictions, and adds the castigation to the function. Now the problem has changed to solve a minimal problem, and GA can be used to the optimal design successfully.

束条件的处理是遗传算法应用到深基坑支护结构优化的难题和重点，本文详细分析了桩撑支护结构的约束条件，采用了罚函数法对约束条件进行处理并反映到适应度函数上，使其变为无约束的极小值问题，从而使遗传算法得以顺利实施。