1e:["$","div",null,{"className":"space-y-5 sm:space-y-6","children":[["$","h1",null,{"className":"rich-html min-w-0 max-w-full break-words text-lg font-medium leading-relaxed tracking-tight text-foreground sm:text-xl sm:leading-relaxed","dangerouslySetInnerHTML":{"__html":"$21"}}],["$","div",null,{"className":"grid gap-3 sm:gap-4 sm:grid-cols-2","children":[["$","section",null,{"aria-labelledby":"excerpt-explanation-heading","className":"min-w-0 rounded-xl bg-muted/70 px-3.5 py-3.5 sm:px-4 sm:py-4","children":[["$","h2",null,{"id":"excerpt-explanation-heading","className":"mb-2 text-sm font-semibold tracking-tight text-foreground sm:text-base","children":"解释"}],["$","div",null,{"className":"rich-html min-w-0 max-w-full break-words text-sm leading-relaxed text-foreground sm:text-base","dangerouslySetInnerHTML":{"__html":"

$k$ 与围岩级别、接触条件有关，回填密实度影响显著。

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抗力 $\\sigma=k\\delta$ 。

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弹性抗力常用局部变形理论（温克尔假定）描述：抗力与径向变形成正比，σ=kδ\sigma=k\deltaσ=kδ，kkk 为弹性抗力系数。

解释

记忆法

弹性抗力常用局部变形理论（温克尔假定）描述：抗力与径向变形成正比， $\sigma=k\delta$ ， $k$ 为弹性抗力系数。